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TA8155FG/FNG
TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic
TA8155FG,TA8155FNG
REC / PB System Dual Pre-amplifier (1.5 / 3V USE)
The TA8155FG and TA8155FNG are REC / PB system dual pre amplifier ICs, which are developed for low voltage operation (1.5 / 3V use). These are especially suitable for a stereo headphone cassette player.
Features
* Built-in dual playback amplifiers. Input coupling condenser-less. Built-in capacitor for buzz noise. * Built-in dual buffer amplifiers. For radio signal inut. Monitor for REC mode. * Built-in dual microphone amplifiers. Built-in an ALC circuit for MIC-REC mode. Attack time. : 0.1s (typ.) Recovery time. : 3.5s (typ.) * * * Built-in dual recording amplifiers. Single-end output type. Built-in a power switch. Low quiescent current. (VCC = 1.2V, Ta = 25C) PB mode .................... ICCQ2 = 2.6mA (typ.) ICCQ4 = 3.0mA (typ.) Radio mode ............. ICCQ3 = 2.4mA (typ.) Radio-REC mode ... MIC-REC mode * ........ ICCQ5 = 4.5mA (typ.) Low power dissipation. PB mode : 2.9mW (typ.) MIC-REC mode : 8.9mW (typ.) * Operating supply voltage range. (Ta = 25C) VCC (opr) = 0.9~4V VCC (opr) (REC) = 1.8~4V Weigh SSOP24-P-300-1.00: 0.32g (typ.) SSOP24-P-300-0.65A: 0.14g (typ.)
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Block Diagram
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Terminal Explanation Terminal Voltage : Typical Terminal Voltage at no Signal with Test Circuit. (VCC = 1.2V, VCC (REC) = 2.4V, Ta = 25C)
Terminal No. Name This terminal voltage supplies output stage of recording amplifier with power source. Function Internal Circuit Terminal Voltage (V)
1
VCC(REC)
2.4
2 3
REC OUTB Output of recording amplifier. REC OUTA PB INB Input of playback amplifier. 0.85 PB INA PB NFB NF of playback amplifier. 0.85 1.15
4
5
7
10
PB NFA
6
VREF
Reference voltage. All amplifier operate on this voltage.
0.85
8
PB OUTB Output of playback amplifier and buffer amplifier. 0.55
9
PB OUTA
11
REC SW
REC / PB switch. VCC: REC mode. GND / OPEN: PB mode. Power switch. VCC: Power on. GND / OPEN: Power off. Line switch. VCC: BUF (radio) mode. GND / OPEN: Tape mode.
12
PW SW
15
Line SW
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Terminal No. Name Function Internal Circuit Terminal Voltage (V)
13
BUF INA Input of buffer amplifier and recording amplifier. (Buffer amplifier is inverter type.) ALC level of microphone amplifier is determined by signal level of this terminal
0.85
14
BUF INB
16
MIC OUTB Output of microphone amplifier. 0.55
17
MIC OUTA
18
MIC NFA NF of microphone amplifier. 0.05
22
MIC NFB
19
MIC INA
Input of microphone amplifier. Built-in capacitor for buzz noise.
0.01
21 20 23
MIC INB GND VCC 0 1.2
24
ALC
ALC terminal. ALC function is operated in only MIC-REC mode.
0.11
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Application Note
(1) PW SW It is necessary to connect an external pull-down resistor with the terminal PW SW (pin(12)), in case that this IC is turned on due to external noise etc. (2) Mode SW IC mode is determined by switch condition of RED SW (pin(11)) and LINE SW (pin(15)) (Table.1) H level: Bias current should be applied to switch terminal more than 5A. L level: Bias voltage should be applied to switch terminal from 0V to 0.3V.
REC SW LINE SW L H
Table.1 IC mode
L PB mode (PB) Radio mode (BUF) H MIC-REC (BUF,MIC,REC) Radio-REC mode (BUF,REC)
( ) : Operating amplifier.
The leak current flows through the terminal of REC SW (pin(11)) or LINE SW (pin(15)), in case that the terminals connected with VCC line independently, even though this IC is off-mode (the terminal of PW SW (pin(12)) is off-mode). And it is necessary to connect an external pull-down resistor with the terminal REC SW (pin(11)) and LINE SW (pin(15)), in case that this IC is turned on due to external noise etc. (3) Playback amplifier Output voltage of playback amplifier is determined by an external resistor R1 and Rf. VO (PRE) = VREF-V-Rf ( V - IB(NF) )
R1
V is an off-set voltage which is designed to 18mV. In case that of transistor is assumed 100, IB(NF) is flowed 0.2A in Fig.1. And output voltage of playback amplifier (pin (8),(9)) in Fig.1 is VO (PRE) = 0.85V-0.018V- (330k+13k) x(
0.018V - 0.2A ) = 0.56(V) 18k
Output voltage of playback amplifier should be fixed VCC / 2, because playback amplifier get a enough dynamic range. And current source of 20A is operated except playback mode, in order to reduce a pop sound in swichover between playback on / off mode (Fig.2).
Fig.1 DC output voltage of playback amplifier.
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(4) Microphone amplifier Current source of 5.5A is operated except MIC-REC mode, because bias is applied to the same output voltage as output voltage of microphone amplifier in operation (Fig.3). (5) VCC (REC) The VCC (REC) terminal (pin(1)) is applied bias to VCC (REC) = VCC-0.7V, because the VCC (REC) terminal (pin(1)) is connected with the VCC terminal (pin(23)) by diode, as internal circuit of termial explanation. And supply current doesn't flow through VCC (REC) terminal (pin(1)), in case that the terminal is connectd with VCC line, even though this IC is on-mode and except REC mode.
Fig.2 Reducing a pop sound of mode switchover (1).
Absolute Maximum Ratings (Ta = 25C)
Characteristic Supply voltage TA8155FG TA8155FNG Symbol VCC VCC (REC) PD (Note) Topr Tstg Rating 4.5 4.5 400 500 -25~75 -55~150 Unit V
Fig.3 Reducing a pop sound of mode switchover (2).
Power dissipation
mW C C
Operating Temperature Storage temperature
(Note) Derated above Ta = 25C in the proportion of 3.2mW / C for TA8155FG, and of 4mW / C for TA8155FNG.
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Electrical Characteristics Unless Otherwise Specified: VCC = 1.2V, VCC(REC) = 2.4V, f = 1kHz, Ta = 25C, SW1: a,
SW8: OPEN, SW 9: ON, SW10: ON, SW11: ON, SW2~SW7 condition by next page
Symbol ICCQ1 ICCQ2 ICCQ3 ICCQ4 ICCQ5 ICCQ6 VREF GVO GVC Vom1 THD1 SW8: ON, SW9: OPEN Vo = -17dBV Vo = -17dBV THD = 1% Vo = -17dBV SW4: OPEN BPF = 30Hz~20kHz NAB (GV = 36dB,f = 1kHz) Vo = -17dBV SW4: OPEN, SW10: OPEN fr = 100Hz, Vr = -32dBV Vo = -17dBV THD = 1% Vo = -17dBV SW5: b, BPF = 30Hz~20kHz Vo = -17dBV SW5: b, SW10: OPEN fr = 100Hz,Vr = -32dBV Vo = -12dBV THD = 1% Vo = -12dBV SW5: b, BPF = 30Hz~20kHz Vo = -12dBV SW5: b, SW10: OPEN fr = 100Hz, Vr = -32dBV Test Cir- cuit Test Condition SW1: b, SW2: b, SW3: b SW2: b, SW3: b SW2: b, SW3: a SW2: a, SW3: a SW2: a, SW3: b SW2: a, SW3: b Min. 1.3 0.8 58 200 Typ. 0.1 2.6 2.4 3.0 4.5 1.5 0.85 70 36 310 0.1 Max. 5 3.9 3.6 4.5 6.5 2.4 0.9 dB 0.3 mVrms % V mA Unit A
Characteristic PW off PB Quiescent current Radio Radio-REC MIC-REC VCC (REC) Reference voltage Open loop voltage gain Closed loop voltage gain
Playback amplifier
Maximum output voltage Total harmonic distortion Equivalent input noise voltage Cross talk (CH-A / CH-B) Ripple rejection ratio Voltage gain Maximum output voltage Total harmonic distortion Output noise voltage Cross talk (CH-A / CH-B) Ripple rejection ratio Voltage gain Maximum output voltage
Vni CT1 RR1 GV2 Vom2 THD2 Vno2 CT2 RR2 GV3 Vom3 THD3 Vno3 CT3 RR3

-4 200 16.5 500
1.2 62 40 -2 270 0.1 35 51 55 18.5 720 0.1 0.09 49 40
3.0 0 20.5 0.5 0.25
Vrms
dB dB mVrms % Vrms dB dB mVrms % mVrms dB
Recording amplifier
Buffer amplifier
Total harmonic distortion Output noise voltage Cross talk (CH-A / CH-B) Ripple rejection ratio
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Characteristic Voltage gain Maximum output voltage Symbol GV4 Vom4 THD4 Vno4 CT4 RR4 GV5 Vom5 THD5 Vno5 VoALC1 VoALC2 CBALC WALC CT5 RR5 I12 V12 Test Cir- cuit Test Condition Vo = -17dBV THD = 1% Vo = -17dBV SW6: a, BPF = 30Hz~20kHz Vo = -17dBV SW6: a, SW10: OPEN fr = 100Hz,Vr = -32dBV SW7: ON, Vo = -17dBV THD = 3% Vin = -32dBV SW6: a, BPF = 30Hz~20kHz Vin = -62dBV Vin = -32dBV VoALC 3dB (input voltage) with respect to standard Vin = -42dBV Vin = -32dBV SW6: a, fr = 100Hz, Vr = -17dBV SW1: c, SW2: b, SW3: b V6 0.6V SW1: d, SW2: b, SW3: b V6 0.2V Min. 30 120 600 -11.7 -11.7 5 0 Typ. 32.5 200 0.25 0.12 52 36 58 800 0.8 2.1 -8.5 -8.5 0 48 37 39 Max. 35 0.8 3.5 -6.7 -6.7 1.5 0.3 dB dB dB dB mVrms % mVrms dBV Unit dB mVrms % mVrms
Microphone amplifier Microphone amplifier + recording amplifier
Total harmonic distortion Output noise voltage Cross talk (CH-A / CH-B) Ripple rejection ratio Voltage gain Maximum output voltage ALC total harmonic distortion Output noise voltage ALC voltage ALC channel balance ALC width Cross talk (CH-A / CH-B) Ripple rejection ratio Power on current Power off voltage
A V
Power switch
Switch Condition For Test Mode (unless otherwise specified.)
Mode Operating Amplifier Switch SW 2 SW 3 SW 4 SW 5 SW 6 SW 7 b b ON b a OPEN b a OPEN a a OPEN a a OPEN a a OPEN ON b b OPEN a b OPEN c PB AMP. (PB mode) BUF AMP. (radio mode) REC AMP. (radio-REC mode) BUF REC MIC AMP. (MIC mode) MIC AMP. + REC AMP. (MIC-REC mode) MIC-ALC BUF, REC
PB
BUF
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Test Circuit
(*) RR5 is measured by circuit below (for VCC line)
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Characteristic Curves Unless Otherwise Specified VCC = 1.2V, VCC(REC) = 2.4V, f = 1kHz, Ta = 25C RL = 10k : PB amp., BUF amp., MIC amp. (load of recoading amplifier is shown in test circuit)
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Package Dimensions
Weight: 0.32g (typ.)
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Package Dimensions
Weight: 0.14g (typ.)
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RESTRICTIONS ON PRODUCT USE
* The information contained herein is subject to change without notice. 021023_D
060116EBA
* TOSHIBA is continually working to improve the quality and reliability of its products. Nevertheless, semiconductor devices in general can malfunction or fail due to their inherent electrical sensitivity and vulnerability to physical stress. It is the responsibility of the buyer, when utilizing TOSHIBA products, to comply with the standards of safety in making a safe design for the entire system, and to avoid situations in which a malfunction or failure of such TOSHIBA products could cause loss of human life, bodily injury or damage to property. In developing your designs, please ensure that TOSHIBA products are used within specified operating ranges as set forth in the most recent TOSHIBA products specifications. Also, please keep in mind the precautions and conditions set forth in the "Handling Guide for Semiconductor Devices," or "TOSHIBA Semiconductor Reliability Handbook" etc. 021023_A * The TOSHIBA products listed in this document are intended for usage in general electronics applications (computer, personal equipment, office equipment, measuring equipment, industrial robotics, domestic appliances, etc.). These TOSHIBA products are neither intended nor warranted for usage in equipment that requires extraordinarily high quality and/or reliability or a malfunction or failure of which may cause loss of human life or bodily injury ("Unintended Usage"). Unintended Usage include atomic energy control instruments, airplane or spaceship instruments, transportation instruments, traffic signal instruments, combustion control instruments, medical instruments, all types of safety devices, etc. Unintended Usage of TOSHIBA products listed in this document shall be made at the customer's own risk. 021023_B * The products described in this document shall not be used or embedded to any downstream products of which manufacture, use and/or sale are prohibited under any applicable laws and regulations. 060106_Q * The information contained herein is presented only as a guide for the applications of our products. No responsibility is assumed by TOSHIBA for any infringements of patents or other rights of the third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of TOSHIBA or others. 021023_C * The products described in this document are subject to the foreign exchange and foreign trade laws. 021023_E
About solderability, following conditions were confirmed * Solderability (1) Use of Sn-37Pb solder Bath * solder bath temperature = 230C * dipping time = 5 seconds * the number of times = once * use of R-type flux (2) Use of Sn-3.0Ag-0.5Cu solder Bath * solder bath temperature = 245C * dipping time = 5 seconds * the number of times = once * use of R-type flux
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