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ICs for Audio Common Use
AN12942B
Audio signal processing IC for notebook PC
Overview
AN12942B is an one-chip IC for the stereo speakers which can output 1 W by 8 , headphone amplifiers, line amplifiers, and electronic volumes. The AGC circuit is built-in to prevent the resonance or the vibration by the speaker's energy and the clipping distortion what is called "broken up sound". Also the AN12942B is built-in power saving on/off function automatically detecting input signal to save the power of speaker amplifier.
Features
* Speaker amplifier 1 W x 2-channel: 8 , VCC = 5 V * Built-in AGC circuit Prevention of the resonance or the vibration due to the speaker and the clipping distortion by AGC at excessive input signal (with AGC on/off switch). * Built-in automatic power saving function. It detects input signals and switches on/off (with the on/off switch for the auto power saving). * Built-in headphone amplifier and line amplifier
Applications
* Notebook PC
Package
* Dual surface implementing package (HSOP056-P-0300A)
Type
* Silicon monolithic bipolar IC
Publication date: June 2003
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AN12942B
Application circuit example
Out-L-ch. (Line) -9.17 dBV 1 F 29 30 31 Line mute -10 dBV 0.47 F 28 27 GND 26 25 24 + + 23 22 21 EVR EVR 20 19 Offset cancel Offset cancel 18 PRI Charge 17 VCC 16 GND 15 14 13 AGC AGC Offset cancel Det. Signal det. Control Mute Save CTL 14 dB 14 dB Mute 12 11 10 GND 9 8 7 SP GND 6 5 Power save 4 3 14 dB VCC_SP 14 dB VCC_SP 2 1 -2 dBV 8 R-ch. out -2 dBV 10 F VREF 10 F 0. 1 F 10 F 0.47 F -10 dBV
1.1 times 1.1 times
In-L-ch. (Line,HP) In-R-ch. (Line,HP)
Out-R-ch. (Line) 1 F 1 F Line mute STBY VCC Beep in -9.17 dBV 1 M Switch B 0.47 F
32 Standby 33 34 35
Switch B-2 Switch B-1 Switch A-3 Switch A-2 Switch A-1 BVREF EVRCTL
Switch A 1 F 1 F HP power save HP mute 100 F 100 F 220 k
36
37 GND 38 6 dB -4 dBV 39 -4 dBV 40 6 dB 41 GND 42 Power save
1 F 10 F
Save CTL
20 k 0. 47 F
V (SP) 43 REF -13 dBV -3 dB 44 -13 dBV -3 dB 45 46 47 GND 48 49
0. 47 F 0. 47 F 0. 47 F 2 200 pF
Signal automatic detection function on/off VCC VCC SP save on/off
0.47 F 0.47 F 1 F
100 k 1 F
Offset cancel
0.47 F AGC on1/on2/off
330 k
50 SP GND 51 52 53 54 55 56
-2 dBV 8 L-ch. out -2 dBV
10 F
Supply voltage 5 V
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Pin Descriptions
Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 Pin name VCC_SP SP_OUT_R+ SP_OUT_R+ SP_OUT_R- SP_OUT_R- GND_SP DETECT_CAP AGC_LV GND AGC_CAP DETECT_IN DAMP_OUT OFFSET_HPR OFFSET_HPL GND VCC PRI_V VREF_IN EVR_CTL BVREF Switch A-1 Switch A-2 Switch A-3 Switch B-1 Switch B-2 GND INPUT_R INPUT_L LINEOUT_L LINEOUT_R LINE_MUTE STANDBY Switch B BEEP_IN Type VCC Output Output Output Output GND Input TTL input GND Input Input Output Input Input GND VCC Input Input TTL input Input Output Output Output Output Output GND Input Input Output Output TTL input TTL input TTL input Input VCC_SP R-channel Description
Speaker amplifier R-channel positive phase output (+) Speaker amplifier R-channel positive phase output (+) Speaker amplifier R-channel negative phase output (-) Speaker amplifier R-channel negative phase output (-) GND_SP R-channel Demodulation pin for signal automatic detection AGC-on level control GND AGC demodulation pin Signal input for signal automatic detection Signal automatic detection mix amplifier output Offset cancel pin for headphone R-channel Offset cancel pin for headphone L-channel GND VCC PRI-charge level pin VREF EVR control for speaker and headphone Bias in Switch A-1 Switch A-2 Switch A-3 Switch B-1 Switch B-2 GND R-channel input L-channel input Line L-channel output Line R-channel output Line mute on/off control Standby on/off control Switch B Input for beep signal
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Pin Descriptions (continued)
Pin No. 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 Pin name Switch A HP_SAVE HP_MUTE GND HP_OUT_L HP_OUT_R VCC GND VREF_SP SP_IN_R SP_IN_L OFFSET_SPR OFFSET_SPL GND DETECT_ON SP_SAVE GND_SP SP_OUT_L- SP_OUT_L- SP_OUT_L+ SP_OUT_L+ VCC_SP Type TTL input TTL input TTL input GND Output Output VCC GND Input Input Input Input Input GND TTL input TTL input GND Output Output Output Output VCC Switch A Headphone power save control Headphone mute on/off control GND Headphone amplifier L-channel output Headphone amplifier R-channel output VCC GND VREF_SP Speaker amplifier R-channel input Speaker amplifier L-channel input Offset cancel pin for speaker R-channel Offset cancel pin for speaker L-channel GND Signal automatic detection on/off control Speaker power save control GND_SP L-channel Speaker amplifier L-channel negative phase output (-) Speaker amplifier L-channel negative phase output (-) Speaker amplifier L-channel positive phase output (+) Speaker amplifier L-channel positive phase output (+) VCC_SP L-channel Description
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Absolute Maximum Ratings
A No. 1 2 3 4 5 Parameter Supply voltage Supply current Power dissipation Storage temperature Operating ambient temperature Symbol VCC VCC_SP ICC PD Tstg Topr Rating 5.75 5.75 517 -55 +150 -20 +75 Unit V A mW C C Note *1 *2 *3 *3
Note) *1: The values under the condition not exceeding the above absolute maximum ratings and the power dissipation. *2: When using this IC, referring to the technical data in page 17, observe the power dissipation characteristic curve. Be sure to use the IC so that the power dissipation of the IC without heat sink will not exceed 517 mW at Ta = 75C. *3: Except for the operating ambient temperature and storage temperature, all ratings are for Ta = 25C.
Operating Supply Voltage Range
Parameter Operating supply voltage range Symbol VCC VCC_SP Range 4.50 5.50 4.50 5.50 Unit V Note *
Note) *: The values under the condition not exceeding the above absolute maximum ratings and the power dissipation.
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Electrical Characteristics at VCC = 5.0 V, VCC_SP = 5.0 V
Note) Ta = 25C2C unless otherwise specified.
B No. Circuit current 1 2 3 4 5 6 7 8
Parameter
Symbol
Test circuits
Conditions
Limits Min Typ Max
Unit
Note
Circuit current 1A at non-signal (VCC_SP) Circuit current 2A at non-signal (VCC) Circuit current 1B at non-signal (VCC_SP) Circuit current 2B at non-signal (VCC) Circuit current 1C at non-signal (VCC_SP) Circuit current 2C at non-signal (VCC) Standby current 1 at non-signal (VCC_SP) Standby current 2 at non-signal (VCC) Output level L-channel Output level R-channel Output distortion L-channel Output distortion R-channel Maximum output electric power L-channel Maximum output electric power R-channel Output noise L-channel Output noise R-channel Channel balance Cross talk in L-channel Cross talk in R-channel
IT1A IT2A IT1B IT2B IT1C IT2C IST1 IST2
1 1 1 1 1 1 1 1
VCC = 5.00 V, at non-signal, at automatic distinction: on

35 20.0 9.3 21.0 35 14.0 10 0.1
70 27.0 18.6 28.0 70 19.0 50 50
A mA mA mA A mA A A

VCC = 5.00 V, at non-signal, SP and HP power save: off, at automatic distinction VCC = 5.00 V, at non-signal, at automatic distinction: off, SP and HP power save: on
VCC = 5.00 V, at standby mode
Speaker amplifier (RL = 8 ): Speaker_input (pin 44, pin 45) Speaker_output (pin 2 to pin 5, pin 52 to pin 55) 9 10 11 12 13 14 15 16 17 18 19 VSPL VSPR THSL THSR VMAXSL VMAXSR VNSL VNSR CHBS CTLSLR CTLSRL 1 1 1 1 1 1 1 1 1 1 1 VIN = -13.0 dBV, f = 1 kHz, RL = 8 VIN = -13.0 dBV, f = 1 kHz, RL = 8 , to THD fifth VIN = 1 kHz, THD = 1%, RL = 8 , Rg = 1 k, RL = 8 , A curve filter VIN = -13.0 dBV, f = 1 kHz, RL = 8 VIN = -13.0 dBV, f = 1 kHz, RL = 8 , A curve filter 2.0 2.0 0.7 0.7 -1 70 70 4.0 4.0 0.04 0.04 0.88 0.88 -76 -76 0 76 76 6.0 6.0 0.5 0.5 -67 -67 1 -3.0 -3.0 1.0 dBV dBV % % W W dBV dBV dB dB dB
Headphone amplifier (RL = 32 ): L-channel, R-channel_input (pin 28, pin 27) Headphone_output (pin 39, pin 40) 20 21 22 Output level L-channel Output level R-channel Channel balance VHPL VHPR CHBH 1 1 1 VIN = -10.0 dBV, RL = 32 Vol = 3.3 V (max), f = 1 kHz VIN = -10.0 dBV, RL = 32 Vol = 3.3 V (max), f = 1 kHz R-ch./L-ch. difference -5.0 -5.0 -1.0 -4.0 -4.0 0.0 dBV dBV dB
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Electrical Characteristics at VCC = 5.0 V, VCC_SP = 5.0 V (continued)
Note) Ta = 25C2C unless otherwise specified.
B No.
Parameter
Symbol
Test circuits
Conditions
Limits Min Typ Max
Unit
Note
Headphone Amplifier (RL = 32 ) (continued): L-channel, R-channel_input (pin 28, pin 27) Headphone_output (pin 39, pin 40) 23 24 25 26 27 28 29 30 31 32 33 34 35 36 Output distortion L-channel Output distortion R-channel Maximum input level L-channel Maximum input level R-channel Maximum output level L-channel Maximum output level R-channel Output noise L-channel Output noise R-channel Cross talk in L-channel Cross talk in R-channel Mute attenuation quantity L-channel Mute attenuation quantity R-channel Beep output level L-channel Beep output level R-channel THHL THHR VMAHIL VMAHIR VMAHOL VMAHOR VNHL VNHR CTLHLR CTLHRL VMUHL VMUHR BEHL BEHR 1 1 1 1 1 1 1 1 1 1 1 1 1 1 VOUT = -14 dBV, RL = 32 Vol = 3.3 V (max), f = 1 kHz THD = 1%, RL = 10 k Vol = 1.65 V (typ), f = 1 kHz THD = 1%, RL = 10 k Vol = 3.3 V (max), f = 1 kHz Rg = 1 k, A curve filter VIN = -10 dBV, RL = 32 f = 10 kHz, A curve filter VIN = -10 dBV, RL = 32 f = 1 kHz, A curve filter VIN = 3.3 VPP, RL = 32 1 cycle = 1ms 0.0 0.0 0.0 0.0 60 60 70 70 0.28 0.28 0.03 0.03 6.0 6.0 2.8 2.8 -94 -94 70 70 90 90 0.58 0.58 0.1 0.1 -79 -79 % % dBV dBV dBV dBV dBV dBV dB dB dB dB VPP VPP dBV dBV dB
Volume part: L-channel, R-channel_input (pin 28, pin 27) Headphone_output (pin 39, pin 40) 37 38 39 Medium voltage gain L-channel Medium voltage gain R-channel Channel balance at the time of the medium gain Volume maximum attenuation quantity L-channel Volume maximum attenuation quantity R-channel VOLL VOLR VCHB 1 1 1 VIN = -20 dBV, f = 1 kHz, Vol = 1.65 V (typ) VIN = -20 dBV, f = 1 kHz, Vol = 1.65 V (typ) R-ch./L-ch. Difference VIN = -10 dBV, f = 1 kHz, Vol = 0.0 V (min), A curve filter -32.5 -30.0 -27.5 -32.5 -30.0 -27.5 -2.0 0.0 2.0
40 41
VOLNL VOLNR
1 1
70 70
90 90

dB dB

Line amplifier part : L-channel, R-channel_input (pin 28, pin 27) Headphone_output (pin 29, pin 30) 42 43 44 45 46 47 48 Output level L-channel Output level R-channel Channel balance Output distortion L-channel Output distortion R-channel Maximum output level L-channel Maximum output level R-channel VHLL VHLR CHBL THLL THLR VMALL5 VMALR5 1 1 1 1 1 1 1 VIN = -10.0 dBV, RL = 10 k, f = 1 kHz VIN = -10.0 dBV, RL = 10 k, f = 1 kHz, R-ch./L-ch. difference VIN = -10.0 dBV, RL = 10 k, f = 1 kHz, THD = 1%, RL = 10 k f = 1 kHz -10.0 -9.2 -10.0 -9.2 -0.8 0.0 0.0 0.0 -8.4 -8.4 0.8 dBV dBV dB % % dBV dBV 7
0.003 0.03 0.003 0.03 4.0 4.0
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Electrical Characteristics at VCC = 5.0 V, VCC_SP = 5.0 V (continued)
Note) Ta = 25C2C unless otherwise specified.
B No.
Parameter
Symbol
Test circuits
Conditions
Limits Min Typ Max
Unit
Note
Line amplifier part (continued) : L-channel, R-channel_input (pin 28, pin 27) Headphone_output (pin 29, pin 30) 49 50 51 52 53 54 Output noise L-channel Output noise R-channel Cross talk in L-channel Cross talk in R-channel Mute attenuation quantity L-channel Mute attenuation quantity R-channel VNLL VNLR CTLLLR CTLLRL VMUHL VMUHR 1 1 1 1 1 1 Rg = 1 k, A curve filter VIN = -10 dBV, RL = 10 k f = 10 kHz, A curve filter VIN = -10 dBV, RL = 10 k f = 1 kHz, A curve filter 60 60 70 70 -105 -105 84 84 87 87 -87 -87 dBV dBV dB dB dB dB
Speaker AGC part : Speaker_input (pin 44, pin 45) Speaker_output (pin 2 to pin 5, pin 52 to pin 55) 55 56 57 58 Speaker amplifier output level L-channel AGC-on1 Speaker amplifier output level R-channel AGC-on1 Speaker amplifier output level L-channel AGC-on2 Speaker amplifier output level R-channel AGC-on2 VAGSPL VAGSPR VAGSP1L VAGSP1R 1 1 1 1 4.5 4.5 5.5 5.5 6.0 6.0 7.0 7.0 7.5 7.5 8.5 8.5 dBV dBV dBV dBV
VIN = -3.0 dBV, f = 1 kHz, RL = 8
Automatic signal detection part : L-channel, R-channel_input (pin 28, pin 27) Signal detection preamplifier output (pin 12) 59 60 61 62 Preamplifier output voltage level L-channel entry Preamplifier output voltage level R-channel entry Signal detection limit entry voltage level L-channel Signal detection limit entry voltage level R-channel VSDTL VSDTR VSDTTHL VSDTTHR 1 1 1 1 VIN = -33 dBV, f = 1 kHz Vol = 1.65 V (typ) -13 -13 -63 -63 -10 -10 -58 -58 -7 -7 -53 -53 dBV dBV dBV dBV
VIN = 1 kHz Vol = 1.65 V (typ)
Switch switching-over voltage level 63 64 65 66 67 68 69 70 71 72 Headphone mute on Headphone mute off Headphone power save on Headphone power save off Speaker power save on Speaker power save off Standby on Standby off Line mute on Line mute off HMUON HMUOF HPSON HPSOF SPSON SPSOF STON STOF LMUON LMUOF 1 1 1 1 1 1 1 1 1 1
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GND 2.0 GND 2.0 GND 2.0 GND 2.0 GND 2.0

0.8 5.5 0.8 5.5 0.8 5.5 0.8 5.5 0.8 5.5
V V V V V V V V V V
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AN12942B
Electrical Characteristics at VCC = 5.0 V, VCC_SP = 5.0 V (continued)
Note) Ta = 25C2C unless otherwise specified.
B No.
Parameter
Symbol
Test circuits
Conditions
Limits Min Typ Max
Unit
Note
Switch switching-over voltage level (continued) 73 74 75 76 77 78 79 80 81 Signal automatic detection feature off Signal automatic detection feature on Speaker-AGC off Speaker-AGC on2 Speaker-AGC on1 Switch A Off Switch A On Switch B Off Switch B On ATOF ATON AGOF AGON1 AGON CMUOF CMUON DMUOF DMUON 1 1 1 1 1 1 1 1 1 GND 2.0 GND 2.5 GND 2.0 GND 2.0 Open 0.8 5.5 0.5 5.5 0.8 5.5 0.8 5.5 V V V V V V V V V
Control Terminal, The Mode Table
Note) The holding range of control voltage is shown in B No. 63 to B No. 81 of Electrical Characteristics.
Pin No. 37 36 49 32 50 35 33 31 Pin No. 8
Description Headphone mute on/off Headphone power save on/off The signal automatic detection feature on/off Standby on/off Speaker power save on/off Switch A Switch B Line mute on/off Description At the time of time of AGC: on, it changes on level.
Voltage Low Mute on Save on (HP off) Automatic distinction: off STB on Save on (SP off) Off Off Mute on High Mute off Save off (HP on) Automatic distinction: on STB off Save off (SP on) On On Mute off Voltage Low AGC: off Open AGC: on2 High AGC: on1
Remarks It has priority over power saving by pin 50 more than an automatic detection.
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Control Terminal, The Leakage Current Table at VCC = 5.0 V, VCC_SP = 5.0 V
* Design reference value Pin No. Description Leakage current IiL-max +2A +2A -20A -20A IiH-max +80A +80A +30A +50A Input impedance The low holding range: High impedance The high holding range: About 80 k The low holding range: High impedance The high holding range: About 80 k About 170 k About 125 k
33 35 37 8
Switch B Switch A Headphone mute on/off At the time of AGC = on, it changes on level.
In the case of less than the voltage of the input voltage limitation circuit Pin No. Description Leakage current IiL-max 31 32 36 49 50 Line mute on/off Standby on/off Headphone power save on/off Signal automatic detection feature on/off Speaker power save on/off +1A +1A -1A +1A -1A IiH-max +1A +1A +1A +1A +1A Input impedance High impedance High impedance High impedance High impedance High impedance
In the case beyond the voltage of the input voltage limitation circuit Leakage current IiL-max +40A +5A IiH-max +100A +50A +200A +20A +200A Input impedance 25 k typ. 45 k typ. 16 k typ. 85 k typ. 15 k typ.
* The sourcing current of the pin is indicated with "+". * The range that a control voltage is held in low level : Pin 33, pin 35, pin 37, pin 31, pin 32, pin 36, pin 49, pin 50 : 0 V 0.8 V Pin 8 : 0 V 0.5 V * The range that a control voltage is held in high level : Pin 33, pin 35, pin 37, pin 31, pin 32, pin 36, pin 49, pin 50 : 2.0 V 5.5 V Pin 8 : 2.5 V 5.5 V * Pin 31, pin 32,pin 36,pin 49 and pin 50 builds in an input voltage limitation circuit. * In the case beyond the voltage of the input voltage limitation circuit, leakage current depends on inside resistance. * When resistance is connected to a pin, current decreases by the sum total of resistance and internal resistance.
Note) The characteristics listed above are reference values based on the IC design and are not guaranteed.
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Technical Data
* Circuit diagrams of the input/output part and pin function descriptions
Note) The characteristics listed below are reference values based on the IC design and are not guaranteed.
Pin No.
Waveform and voltage
Inner circuit
Impedance
Description Power supply pins specifically designed for speaker amplifiers. * Pin 1 for R-channel. * Pin 56 for L-channel. Because the big electric current flows, it is desirable to separate from the VCC line to the other power supply pins on the board pattern.
1, 56
VCC_SP DC: 5.0 V
52, 53, 54, 55, 2, 3, 4, 5
Speaker output Pin 52, pin 53 Pin 2, pin 3 Positive phase
VCC_SP (5.0 V) 18k
Pin 52, pin 53, pin 2, pin 3
Pin 54, pin 55 Pin 4, pin 5 Negative phase
3.6k
Pin 54, pin 55, pin 4, pin 5
DC: 2.20 V AC: 4 dBV
Output pins of speaker amplifiers. It becomes BTL output. * Pin 54, pin 55 for L-channel positive phase output * Pin 52, pin 53 for L-channel negative phase output The output * Pin 2, pin 3 for R-channel positive impedance: Equal phase output to or less than 1 * Pin 4, pin 5 for R-channel negative phase output To reduce voltage loss caused by the wire resistance in maximum output, it makes output 2 terminals. When the speaker amplifiers save power, DC voltage is also kept. It is GND pin for the speaker amplifier. * Pin 6 is for R-channel. * Pin 51 is for L-channel. Because the big electric current flows, it is desirable to separate from the GND line to the other GND pin on the board pattern. Also, it isn't connected with the substrate potential in the IC.
51, 6
GND_SP DC : 0.0 V
31 31 Line mute control
25 k
The base entry (With the resistance) It controls on/off of the mute function of In the range which the line output. entry limiter does not depend on, it is high impedance.
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Technical Data (continued)
* Circuit diagrams of the input/output part and pin function descriptions (continued)
Note) The characteristics listed below are reference values based on the IC design and are not guaranteed.
Pin No.
Waveform and voltage Audio automatic detection detection pin: 7
Inner circuit VREG (4.5 V) 100
Impedance
Description It connects a condenser for the peak detection. It is the circuit which detects a peak after rectifying the audio signal of the audio signal automatic detection circuit in both waves. By changing a capacity value, the time which the power saving depends on in case of the switchover which is without signal with signal's there being can be changed.
7
Signal nothing DC: 0.0 V Signal's there being DC: 2.0 V
40k
Signal less time: Constant current source Signal's there being: The output impedance: About 200
9, 15, 26, 38, 42, 48
GND DC: 0.0 V
It is the GND pins of the signal system. It is connected with the substrate potential of the IC. Pin 15, pin 42 connect with the lead frame of the IC.
VCC_SP (5.0 V) VREF (SP) 43 DC: 2.20 V 43 400k 400k The entry impedance: About 200 k It is the standard voltage pin to fix the DC bias of the speaker output. It connects a condenser to remove a ripple.
VREG (4.5 V) Line out 29, 30 AC: -9.17 dBV DC : 2.25 V 9.6k 17.4k The output impedance: Equal It is the output pin of the line amplifier. to or less than about 10
Pin 29, Pin 30
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Technical Data (continued)
* Circuit diagrams of the input/output part and pin function descriptions (continued)
Note) The characteristics listed below are reference values based on the IC design and are not guaranteed.
Pin No.
Waveform and voltage
Inner circuit VREG (4.5 V)
Impedance
Description
49
Signal automatic detection function on/off control pin DC:
8k 220k 44k 8k 80k
49
The entry impedance: The high impedance
We change an audio signal automatic detection function in on/off. In case of automatic detection off, it controls power saving by speaker with the manual with the power saving on/off pin. * High: Function on * Low: Function off
Speaker amplifier entry 44, 45 DC: 2.25 V AC: -10 dBV
Pin 45, pin 44
18k VREF (2.25 V)
It is the voice input pins of the speaker amplifier. To make offset voltage in power saving on/off changing by the The entry speaker amplifier little, it combines impedance: About capacity. 18 k ( It makes POP noise small ). Pin 44: R-channel speaker entry Pin 45: L-channel speaker entry
VREG (4.5 V) BVREF 20 DC: V 20 The entry impedance: The high impedance
It is the input pin of BVREF.
21, 22, 23,
Switch A-1 Switch A-2 Switch A-3
VREG (4.5 V)
Pin 21, pin 22, pin 23, pin 24, pin 25 20
24, 25 33 35
Switch B-1 Switch B-2 DC: V Switch B Switch A Pin 33, pin 35 DC: 0 V (at Open) 250k 80k
The output impedance: Equal It is the output pin of BVREF. to or less than about 10
We change a noise removal function in The entry on/off. impedance: About * High: Function on 80 k * Low: Function off
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Technical Data (continued)
* Circuit diagrams of the input/output part and pin function descriptions (continued)
Note) The characteristics listed below are reference values based on the IC design and are not guaranteed.
Pin No.
Waveform and voltage
Inner circuit
Impedance
Description
VCC (5.0 V) Pri_charge level pin 17 DC: 3 V 17 240k
160k
The entry impedance: It is the voltage pin for DC bias pri_charge. About 100 k
Pin 28, pin 27 Audio signal input 27, 28 DC: 2.25 V AC: -10 dBV
VREG (4.5 V)
22.5k
13.2k
It enters a main audio signal. The entry impedance: * Pin 27: R-channel entry About 22.5 k * Pin 28: L-channel entry
22.5k
31.8k
VREF (2.25 V) VREF (2.25 V) It is the power supply (VCC) pin to supply the regulator circuit to create the inner power supply VREG with the voltage. It is separating from VCC_SP of pin 1, pin 56 fully inside. It is desirable to separate as far as it finishes coming out about the P board pattern, too.
16, 41
VCC DC: 5.0 V
32 Standby on/off changing SW 32 Open DC voltage DC: 0.00 V 80k
240k
It changes whether or not it makes this IC an operation condition or whether or not it makes it a standby. The entry impedance: * Low: Standby About 80 k * High: The operation condition In that the power changes a connected condition to the standby, the circuit electric current can be almost made 0.
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Technical Data (continued)
* Circuit diagrams of the input/output part and pin function descriptions (continued)
Note) The characteristics listed below are reference values based on the IC design and are not guaranteed.
Pin No.
Waveform and voltage 180
Inner circuit
Impedance
Description
34 Beep entry 34 DC: 2.25 V AC: 3.3 VPP
6.75k 18k VREF (2.25 V) VCC (5 V)
It is the entry pin to enter beep signal. The same signal is entered both by The entry impedance: About L-channel and R-channel with the audio 180 k signal mix amplifier of the following paragraph.
VREF 18 DC: 2.25 V 18
440k 360k
With the pin to fix the bias voltage (the operation point) of the system which the The entry inner power supply (VREG) works, it impedance: About becomes 1/2 VREG (V). To remove noise, 200 k it connects a condenser with the interval of GND.
VREG (4.5 V) The signal detection system preamplifier output pin 12 DC: 2.25 V AC: -10 dBV
12
The output It is the output pin of the signal detection impedance: About system preamplifier. 10
Signal input for signal automatic detection 11 DC: 2.25 V AC: -10 dBV
11 It is the signal input pin for signal The entry automatic detection. It is possible to impedance: About adjust in the direction lowers a gain by 20 k adding external resistance. 20k VREF (2.25 V)
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Technical Data (continued)
* Circuit diagrams of the input/output part and pin function descriptions (continued)
Note) The characteristics listed below are reference values based on the IC design and are not guaranteed.
Pin No.
Waveform and voltage
Inner circuit
Impedance
Description
80k 19 19 EVR control for SP and HP DC: V The entry impedance: The high impedance It is the pin which controls EVR for speaker amplifier and Headphone amplifier. The holding range with control voltage is 0 V to 3.3 V.
VREG (4.5 V) AGC detection pin 10 DC: 0 V 1 V 80k It is the detection circuit to detect the signal level of the AGC circuit of the speaker output for the clip prevention. It connects a condenser for the detection.
10
90
The entry impedance: Unsettled
VREG (4.5 V) AGC on1/on2/off control pin DC: 216k 48k 96k 240k 40k 120k 8
8
It is the pin which controls the operation of the AGC circuit of the speaker output for the clip prevention in on/off. The entry At the time of off , the AGC circuit does impedance: About not work. 76 k * "High" : AGC-on1 * "Open" : AGC-on2 * "Low" : AGC-off
VREG (4 V)
13, 14, 46, 47
Offset cancellation C pin DC : 2.25 V
Pin 13, pin 14, pin 46, pin 47
80k
It is the condenser connection pin of the The entry offset cancellation circuit to remove the impedance: About DC offset. As the principle, it composes high pass filter by entry impedance "R" 80 k and connection condenser "C".
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Technical Data (continued)
* Circuit diagrams of the input/output part and pin function descriptions (continued)
Note) The characteristics listed below are reference values based on the IC design and are not guaranteed.
Pin No.
Waveform and voltage
Inner circuit VCC (5 V) VREG (4.5 V) 180k
Impedance
Description
50
SP amplifier power saving on/off control pin DC:
80k
50
The entry impedance: The high impedance
48k VCC (5 V) VREG (4.5 V) 200k The entry impedance: The high impedance
It is the pin which controls power saving by the speaker amplifier. At the time of on in addition to the control in case of automatic distinction function off, too, power saving on by pin 50 have priority over.
36
HP amplifier power saving on/off control pin DC:
16k
36
It is the pin which controls power saving by the headphone amplifier.
70k
VREG (4.5 V) HP amplifier mute on/off control terminal DC : 2.0 V 220k 200k 80k 130k 160k 37 The input impedance: Equal It controls on/off of the mute function of to or less than the headphone output. about 170 k
37
VREG (4.5 V) Output terminal for the HP amplifier Pin 39, pin 40
39, 40
DC : 2.20 V AC : -4 dBV
The output impedance: Equal to or less than about 1
It is an output pin for the headphone amplifier. The signal which was adjusted in the volume in EVR can be output by the low impedance.
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AN12942B
Technical Data (continued)
* Power dissipation of package HSOP056-P-0300A PD Ta
5.000
4.280 4.000 Mounted on four layers of standard board Soldering radiation plate (50 x 50 x 0.8 mm3) Rth(j-a) = 29.2C/W
Power dissipation PD (W)
3.000
2.000
Mounted on standard board Nonsoldering radiation plate (50 x 50 x 0.8 mm3) Rth(j-a) = 79.5C/W 1.572
1.000
0.862 Independent IC without a heat sink Rth(j-a) = 144.9C/W 0 25 50 75 100 125 150
0.000
Ambient temperature Ta (C)
Note) The characteristics listed above are reference values based on the IC design and are not guaranteed.
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AN12942B
Technical Data (continued)
Main characteristics 1) Speaker amplifier Speaker I/O characteristics - 8
SP output level (pin 52-pin 55, pin 2-pin 5) (dBV)
20 VCC = 5 V VCC_SP = 5 V L-in, R-in L-out, R-out EVR = 3.3 V AGC: Off SP input (pin 45, pin 44) 24 k-ATT HPF: 400 Hz LPF: 20 kHz
SP output (pin 52-pin 55, pin 2-pin 5) distortion THD (%)
Speaker I/O characteristics - 8
10 VCC = 5 V VCC_SP = 5 V L-in, R-in L-out, R-out freq = 1 kHz EVR = 3.3 V AGC: Off SP input (pin 45, pin 44) 24 k-ATT HPF: 400 Hz LPF: 20 kHz
10
1
0
-10
0.1
-20
-30 -40
-30
-20
-10
0
0.01 -40
-30
-20
-10
0
Input level (L-ch., R-ch. pin 28, pin 27) (dBV)
Input level (L-ch., R-ch. pin 28, pin 27) (dBV)
SP output level (pin 52-pin 55, pin 2-pin 5) (dBV)
10
SP output (pin 52-pin 55, pin 2-pin 5) distortion THD (%)
Speaker output frequency characteristics - 8
Speaker output frequency characteristics - 8
10 VCC = 5 V VCC_SP = 5 V L-in, R-in L-out, R-out VIN = -10 dBV EVR = 3.3 V AGC: Off SP input (pin 45, pin 44) 24 k-ATT
8
1
6
4
2
0 0.01
VCC = 5 V VCC_SP = 5 V L-in, R-in L-out, R-out VIN = -10 dBV EVR = 3.3 V AGC: Off SP input (pin 45, pin 44) 24 k-ATT 0.1 1 10 100
0.1
0.01 0.01
0.1
1
10
100
Input frequency (L-ch., R-ch. pin 28, pin 27) (kHz)
Input frequency (L-ch., R-ch. pin28, pin27) (kHz)
Speaker output frequency characteristics - 8
40
Speaker output frequency characteristics - 8
40
50
SP output cross talk (R-ch. L-ch.) (dB)
SP output cross talk (L-ch. R-ch.) (dB)
VCC = 5 V VCC_SP = 5 V VIN = -10 dBV EVR = 3.3 V AGC: Off SP input (pin 44) 24 k-ATT LPF: 80 kHz
50
VCC = 5 V VCC_SP = 5 V VIN = -10 dBV EVR = 3.3 V AGC: Off SP input (pin 45) 24 k-ATT LPF: 80 kHz
60
60
70
70
80 0.01
0.1
1
10
100
80 0.01
0.1
1
10
100
Input frequency (L-ch.-pin 28) (kHz)
Input frequency (R-ch.-pin 27) (kHz)
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AN12942B
Technical Data (continued)
Main characteristics 2) Headphone amplifier Headphone amplifier I/O characteristics - EVR = max
HP amplifier output (Pin 39, Pin 40) level (dBV)
10 0 -10 -20 -30 -40 -50 -60 -50 VCC = 5 V VCC_SP = 5 V L-in, R-in L-out, R-out freq = 1 kHz RL = 32 EVR = 3 V
HP amplifier output (Pin 39, Pin 40) distortion THD (%)
Headphone amplifier I/O distortion characteristics - EVR = max
10 VCC = 5 V VCC_SP = 5 V L-in, R-in L-out, R-out freq = 1 kHz RL = 32 EVR = 3 V
1
0.1
0.01
-40
-30
-20
-10
0
10
0.001 -50
-40
-30
-20
-10
0
10
Input level (Pin 28, Pin 27) (dBV)
Input level (Pin 28, Pin 27) (dBV)
HP amplifier output (Pin 39, Pin 40) level (dBV)
10
HP amplifier output (Pin 39, Pin 40) distortion THD (%)
Headphone amplifier frequency characteristics - EVR = max
VCC = 5 V VCC_SP = 5 V L-in, R-in L-out, R-out VIN = -10 dBV RL = 32 EVR = 3 V
Headphone amplifier frequency characteristics - EVR = max
10 VCC = 5 V VCC_SP = 5 V L-in, R-in L-out, R-out VIN = -10dBV 1 RL = 32 EVR = 3 V
0
0.1
-10
0.01
-20 0.01
0.1
1
10
100
0.001 0.01
0.1
1
10
100
Input frequency (Pin 28, Pin 27) (kHz)
Input frquency (Pin 28, Pin 27) (kHz)
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AN12942B
Technical Data (continued)
Main characteristics (continued) 2) Headphone amplifier (continued) Headphone amplifier I/O characteristics - EVR = typ
HP amplifier output (Pin 39, Pin 40) level (dBV)
VCC = 5 V VCC_SP = 5 V 0 L-in, R-in L-out, R-out freq = 1 kHz RL = 32 -10 EVR = 1.5 V -20 -30 -40 -50 -60 -50 10
Headphone amplifier I/O distortion characteristics - EVR = typ
HP amplifier output (Pin 39, Pin 40) distortion THD (%)
10 VCC = 5 V VCC_SP = 5 V L-in, R-in L-out, R-out freq = 1 kHz RL = 32 EVR = 1.5 V
1
0.1
0.01
-40
-30
-20
-10
0
10
0.001 -50
-40
-30
-20
-10
0
10
Input level (Pin 28, Pin 27) (dBV)
Input level (Pin 28, Pin 27) (dBV)
EVR attenuate level characteristics - Headphone output
HP amplifier output (Pin 39, Pin 40) distortion THD (%)
EVR attenuate distortion characteristics - Headphone output
10 VCC = 5 V VCC_SP = 5 V L-in, R-in L-out, R-out VIN = -10 dBV freq = 1 kHz RL = 32
HP amplifier output (Pin 39, Pin 40) level (dBV)
0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 0 0.5 1 1.5 VCC = 5 V VCC_SP = 5 V L-in, R-in L-out, R-out VIN = -10 dBV freq = 1 kHz RL = 32 2 2.5 3
1
0.1
0.01 0 0.5 1 1.5 2 2.5 3
EVR-CTL (Pin 19) (V)
EVR-CTL (Pin 19) (V)
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AN12942B
Application Notes
1. Linear amplifier circuit block Following block diagrams is line amplifier circuit. -3 dB 13.1k 31.9k -3 dB 13.1k 31.9k +3.83 dB Line mute
Line input L-channel
28
+3.83 dB
Line output 29 L-channel
Line input R-channel
27
Line output 30 R-channel 31 Line mute control
Headphone amplifier input terminal (Input impedance = 45 k) 1) The gain of the linear amplifier system is +0.83 dB. 2) To become a connection of the standing in the row, the entry impedance of pin 28, pin 27 becomes 22.5 k. It stores up that these pins also serve as the headphone entry (the impedance = 45 k). 3) It is possible to adjust to the direction which lowers a gain in adding resistance to pin 28, pin 27. But, the gain of the headphone system, too, changes at the same time. Pin 28 Pin 27 13.1k +3.83 dB R 31.9k
If external resistance is "R" Gain = 20 log 31.9 k R + 13.1 k + 31.9 k
4) By the mute control by pin 31, the line can be output in the mute. 5) For the pop sound measure at the time of power on, delay from the standby cancellation by pin 32 and cancel a linear mute. (Refer to sheet no.2 for circuit constant.) Design reference value Parameter The input/output gain Input impedance Design reference value +0.83 dB 22.5 k
Note) *: It done the change being of 10% because there is a change of the inner resistance. Note) *: But, it limits into the sound band range of equal to or less than 50 kHz. Note) *: The time of the warp (to 5th of THD) of 1% of output. Note) *: The time of the warp (to 5th of THD) of 1% of output.
Note
Output impedance Maximum input level Maximum output level Ability of the output drive
Equal to or less than 10 1.6 dBV 3.0 dBV Equal to or more than 10 k of loads
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AN12942B
Application Notes (continued)
2. Headphone amplifier circuit block Following block diagrams is headphone amplifier circuit.
Headphone input 28 L-channel
-6 dB 22.5k 45k
+6 dB (at EVR = Max) EVR +
+6 dB
40 Headphone output L-channel
Headphone input R-channel
27
-6 dB 45k
22.5k +
+6 dB EVR
+6 dB HP mute
39 Headphone output R-channel 37 Headphone mute control
6.75k Beep input 34 Beep HP EVR
HP save
36 Headphone power save control 19 EVR control
Headphone amplifier input pin (Input impedance = 45 k) 1) The gain of the headphone amplifier system is +6.0 dB when EVR is maximum. 2) To become a connection of the standing in the row, the entry impedance of pin 28, pin 27 becomes 22.5 k. It stores up that these pin also serve as the headphone entry (the impedance = 45 k). 3) It is possible to adjust to the direction which lowers a gain in adding resistance to pin 28, pin 27. But, the gain of the line system, too, changes at the same time. Pin 28 22.5k Pin 27 45k R If external resistance is "R" Gain = 20 log 22.5 k R + 45 k
4) By the mute control by pin 37, the headphone can be output in the mute. 5) By the EVR control of pin 19, the gain of the headphone output can be variably done. 6) The entry of the beep circuit of pin 34 is a virtual grounding entry. Therefore, the external resistance is necessary. 7) For the pop sound measure at the time of power on, delay from the standby cancellation by pin 32 and cancel a headphone save mute. (Refer to sheet no.2 for circuit constant.) 8) When high impedance load is likely to be connected to headphone amplifier output, insert a resistor of 1 to 4.7 k so as to lower shock noise at power on or standby on/off. Pin 39 Pin 40 1k ~ 4.7k
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AN12942B
Application Notes (continued)
2. Headphone amplifier circuit block (continued) * Beep signal I/O 6.75k R1 IN1 - 34 Comparator + R2 VREF Input amplifier Headphone amplifier IN2 IN3 R3
Speaker amplifier
Since input amplifier is of a reverse amplifier system, any input to pin 34 through a resistor from some circuits would not cause any drop of input impedance. Gain of in 1 6.75 k Gain = 20 log R1 Gain of in 2 6.75 k Gain = 20 log R2 Threshold level of comparator is 0.1 Vrms to 0.4 Vrms. Therefore, keep output of input amplifier equal to or more than 0.4 Vrms. Equal to or more than 0.4 Vrms ensures that a certain level of beep sound is output to the speaker. Beep I/O level characteristics : Speaker load - 8
10
Beep frequency level characteristics : Speaker load - 8
2
1
SP output level (R-ch., L-ch.) (Vrms)
SP output level (R-ch., L-ch.) (Vrms)
0.1 VCC = 5 V VCC_SP = 5 V Beep L-out, R-out freq = 1 kHz Input resistance = 15 k Square wave EVR = 3 V(max) AGC : Off Autimatic detection on 1 10
1.5 VCC = 5 V VCC_SP = 5 V Beep L-out, R-out VIN = 1.5 Vrms Input resistance = 15 k Square wave EVR = 3 V(max) AGC : Off Autimatic detection on 1 10 100
0.01
0.001 0.1
1 0.1
Beep input level (Pin 34) (Vrms)
Beep input frequency (Pin 34) (kHz)
Design reference value Parameter The input/output gain Input impedance Design reference value +6.0 dB 22.5 k Note
Note) *: At EVR is maximum. Note) *: It done the change being of 10% because there is a change of the inner resistance. Note) *: But, it limits into the sound band range of equal to or less than 50 kHz. Note) *: The time of the warp (to 5th of THD) of 1% of output. Note) *: The time of the warp (to 5th of THD) of 1% of output.
Output impedance Maximum input level Maximum output level Ability of the output drive
Equal to or less than 1 3.0 dBV 2.4 dBV Equal to or more than 32 of loads
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AN12942B
Application Notes (continued)
3. Speaker amplifier circuit block Following block diagrams is speaker amplifier circuit. -3 dB SP input L-ch. 45 18k AGC +14 dB Mute +14 dB + Offset cancel 46 +14 dB Save +14 dB Mute 2 SP output R-ch.+ 3 SP output R-ch.+ 4 SP output R-ch.- 5 SP output R-ch.- 50 SP save 55 SP output L-ch.+ 54 SP output L-ch.+ 53 SP output L-ch.- 52 SP output L-ch.- 10 -3 dB SP input R-ch. 44 18k AGC Det.
Offset cancel 47
1) The gain of the speaker amplifier system is +17.0 dB. 2) The entry impedance of pin 45, pin 44 becomes 18 k. 3) It is possible to adjust to the direction which lowers a gain in adding resistance to pin 28, pin 27. Pin 44 Pin 45 R Gain at insert a resistance Gain = 20 log 18 k R + 18 k + 17 dB 18k
4) By the power save control by pin 50, the speaker can be output in the save mute. 5) For the pop sound measure at the time of power on, delay from the standby cancellation by pin 32 and cancel a speaker save mute. Design reference value Parameter The input/output gain Input impedance Design reference value +17.0 dB 18 k
Note) *: It done the change being of 10% because there is a change of the inner resistance. Note) *: But, it limits into the sound band range of equal to or less than 50 kHz. Note) *: The time of the warp (to 5th of THD) of 10% of output.
Note
Output impedance Maximum output level Ability of the output drive
Equal to or less than 1 1 W : at 8 of loads Equal to or more than 8 of loads
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AN12942B
Application Notes (continued)
* The output wave at the time of AGC operation It is the following output wave form chart at the AGC operation time. AGC-off
SP out R-ch.+ Pin2 ~ Pin3
AGC-on1
VCC = 5 V VCC_SP = 5 V VIN = 1 Vrms f = 1 kHz SP R-ch. input (Pin 44) SP out R-ch. load 8 Output : 1.34 W
SP out R-ch.+ Pin2 ~ Pin3
VCC = 5 V VCC_SP = 5 V VIN = 1 Vrms f = 1 kHz SP R-ch. input (Pin 44) SP out R-ch. load 8 Output : 0.54 W
SP out L-ch.- Pin4 ~ Pin5
SP out L-ch.- Pin4 ~ Pin5
AGC-on2
SP out R-ch.+ Pin2 ~ Pin3
VCC = 5 V VCC_SP = 5 V VIN = 1 Vrms f = 1 kHz SP R-ch. input (Pin 44) SP out R-ch. load 8 Output : 0.28 W
SP out L-ch.- Pin4 ~ Pin5
Example: Output waveform of sound signal input
AGC on
AGC off
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AN12942B
Application Notes (continued)
4. Automatic power save of speaker amplifier function When input signal becomes zero or very small, a speaker amplifier is automatically power save off. 28 27 EVR EVR OFFSET CANCEL OFFSET CANCEL 12 R 11 Signal Det. 20 k 7 CDET
VREF C
In the case that a detection circuit operation error to noise, insert "R" and "C" between pin 12 and pin 11 to prevent operation error. fC = 1 2RC
However, that insertion of "R" causes input signal to attenuate. Gain = 20 log 20 k R + 20 k
Setting L-channel, R-channel input of -58 dBV (Vol = 1.65 V) as detection threshold, insertion of "R" would drive detection threshold value up for the above gain.. CDET of pin 7 is capacitor to determine detection time.
Det.capacity vs detection time (Signal input Speaker automatic power save off)
200
Det.capacity vs detection time (Input signal off Speaker automatic power save on)
2
150
1.5
Detection time (sec)
Detection time (sec)
100
1
50
0.5
0 0.01
0.1
1
0 0.01
0.1
1
Det. capacity (Pin 7) (F)
Automatic off (Detection time until audio output) Measurement conditions * VCC, VCC_SP = 5 V * Signal input Time difference until speaker output * Measure time difference from signal input (sine wave) at no signal status until speaker output. * Speaker output (load 8 ) = -4 dBV, f = 1 kHz
Det. capacity (Pin 7) (F)
Automatic power save on (No sound Time until power save) Measurement conditions * VCC, VCC_SP = 5 V * Input signal off Time difference until speaker power save * Measure time difference from switching speaker signal (sine wave) output to no input until speaker power save. * Speaker output (load 8 ) = -4 dBV, f = 1 kHz
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AN12942B
Application Notes (continued)
5. Mute switch of signal line circuit
CD/DVD player audio signal output and etc.
Switch A 35 21
Reference voltage 20 input for mute Pin21 to pin25 When mute is on mode,output reference voltage input via buffer amplifier. Output impedance is equal to or less than 10 . When mute is off mode, it become high impedance.
22
23
24
25
Switch B 33
Note) * : Refer to sheet no.12 for circuit of inner IC
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AN12942B
Outside figure (Unit: mm)
* HSOP056-P-0300A (Lead-free package)
14.00 0.10 (6.90) (5.45) 56 29
Area of no resin flash
(1.00) (3.70) 6.10 0.10 8.10 0.20
(2.25)
0 to 8 0.50 0.10 0.50 1.20 max. 1 (0.25) 28 0.10 M (1.00) 0.10 0.10
0.10
Seating plane
Seating plane
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AN12942B
Usage Notes
* Avoid the power line short and the ground short of the terminals. * Especially positive phase speaker output pins (pin 2, pin 3, pin 54 and pin 55) and negative phase speaker output pins (pin 4, pin 5, pin 52 and pin 53) have the possibility of break-down caused by the power line short and the ground short. Be sure to avoid power line short, ground short and load short.
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30
Request for your special attention and precautions in using the technical information and semiconductors described in this material
(1) An export permit needs to be obtained from the competent authorities of the Japanese Government if any of the products or technologies described in this material and controlled under the "Foreign Exchange and Foreign Trade Law" is to be exported or taken out of Japan. (2) The technical information described in this material is limited to showing representative characteristics and applied circuits examples of the products. It neither warrants non-infringement of intellectual property right or any other rights owned by our company or a third party, nor grants any license. (3) We are not liable for the infringement of rights owned by a third party arising out of the use of the product or technologies as described in this material. (4) The products described in this material are intended to be used for standard applications or general electronic equipment (such as office equipment, communications equipment, measuring instruments and household appliances). Consult our sales staff in advance for information on the following applications: * Special applications (such as for airplanes, aerospace, automobiles, traffic control equipment, combustion equipment, life support systems and safety devices) in which exceptional quality and reliability are required, or if the failure or malfunction of the products may directly jeopardize life or harm the human body. * Any applications other than the standard applications intended. (5) The products and product specifications described in this material are subject to change without notice for modification and/or improvement. At the final stage of your design, purchasing, or use of the products, therefore, ask for the most up-to-date Product Standards in advance to make sure that the latest specifications satisfy your requirements. (6) When designing your equipment, comply with the guaranteed values, in particular those of maximum rating, the range of operating power supply voltage, and heat radiation characteristics. Otherwise, we will not be liable for any defect which may arise later in your equipment. Even when the products are used within the guaranteed values, take into the consideration of incidence of break down and failure mode, possible to occur to semiconductor products. Measures on the systems such as redundant design, arresting the spread of fire or preventing glitch are recommended in order to prevent physical injury, fire, social damages, for example, by using the products. (7) When using products for which damp-proof packing is required, observe the conditions (including shelf life and amount of time let standing of unsealed items) agreed upon when specification sheets are individually exchanged. (8) This material may be not reprinted or reproduced whether wholly or partially, without the prior written permission of Matsushita Electric Industrial Co., Ltd.
2002 JUL

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