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RF COMMUNICATIONS PRODUCTS
SA5752 Audio processor - companding, VOX and amplifier section
Product Specification Replaces data of December 6, 1993 IC17 Data Handbook 1997 Nov 07
Philips Semiconductors
Philips Semiconductors
Product specification
Audio processor - companding, VOX and amplifier section
SA5752
DESCRIPTION
The SA5752 is a high performance low power audio signal processing system especially designed to meet the requirements for small size and low voltage operation of hand-held equipment. The SA5752 subsystem includes a low noise microphone preamplifier with adustable gain, a noise cancellation switching amplifier with adjustable threshold, a voice operated transmitter (VOX) switch, VOX control, an audio compressor with buffered input, audio expandor, and an internal bandgap voltage regulator with power down capability. When used with Philips Semiconductors' SA5753, the complete audio processing function of an AMPS or TACS cellular telephone is easily implemented. The system also meets the requirements of the proposed NAMPS or NTACS specifications. The SA5752 can also be used without the SA5753 in a wide variety of radio communications applications.
PIN CONFIGURATION
DK PACKAGE
MICIN 1 20 NCAN OUT 19 COMPIN 18 COMPCAP3 17 COMPCAP1 16 COMPOUT
PREAMPGRES 2 RECTGRES 3
NCANCAP 4 VOXOUT VOXTR GND VREF VCC 5 6 7 8 9
SA5752
15 COMPCAP2 14 VOXCTL 13 HPDN 12 EXPIN 11 EXPOUT
FEATURES
* Operating voltage range: 2V to 5.5V * Miniature SSOP * High performance * Adjustable VOX and noise cancellation threshold * Adjustable gain preamplifier * Audio companding * ESD protected * Open collector VOX output * Logic inputs CMOS compatible * Power down mode * Few external components * Meets AMPS/TACS/NAMPS/NTACS requirements
EXPCAP 10
SR00659
Figure 1. Pin Configuration
BENEFITS
* Very compact applications * Long battery life in portable equipment * Complete cellular audio function with the SA5753
APPLICATIONS
* Cellular radio * Mobile communications * High performance cordless telephones * 2-way radio
ORDERING INFORMATION
DESCRIPTION 20-Pin Plastic Shrink Small Outline Package (SSOP) TEMPERATURE RANGE -40 to +85C ORDER CODE SA5752DK DWG # SOT266-1
1997 Nov 07
2
853-1721 18666
Philips Semiconductors
Product specification
Audio processor - companding, VOX and amplifier section
SA5752
PIN DESCRIPTIONS
PIN NO. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 SYMBOL MICIN PREAMPGRES RECTGRES NCANCAP VOXOUT VOXTR GND VREF VCC EXPCAP EXPOUT EXPIN HPDN VOXCTL COMPCAP2 COMPOUT COMPCAP1 COMPCAP3 COMPIN NCANOUT Microphone input Preamplifier gain resistor Rectifier gain resistor Noise cancellation timing capacitor Voice operated transmission output Voice operated transmission threshold resistor Ground Reference voltage Positive supply Expandor timing capacitor Expandor output Expandor input Hardware power-down Voice operated transmission control Compressor capacitor 2 DC block Compressor output Compressor timing capacitor 1 Compressor capacitor 3 DC block Compressor input Noise cancellation output DESCRIPTION
BLOCK DIAGRAM
20 19 BUFFER 18 17 16 15 14 13 12 11
EXPANDOR COMPANDOR
SA5752
NOISE CANCEL PREAMP VOX BANDGAP VOLTAGE REF
1
2
3
4
5
6
7
8
9
10
SR00660
Figure 2. Block Diagram
1997 Nov 07
3
Philips Semiconductors
Product specification
Audio processor - companding, VOX and amplifier section
SA5752
ABSOLUTE MAXIMUM RATINGS
SYMBOL VCC VIN TSTG TA Power supply voltage range Voltage applied to any other pin Storage temperature Ambient operating temperature PARAMETER RATING -0.3 to 6 -0.3 to (VCC+0.3) -65 to +150 -40 to +85 UNIT V V
oC
C
DC ELECTRICAL CHARACTERISTICS
TA = 25oC, VCC = +3.0V, 0dB = 77.5mVRMS. See test circuit, Figure 6. LIMITS SYMBOL VCC ICC ZL PARAMETER Supply voltage Supply current Load impedance pins NCANOUT, EXPOUT COMPOUT ZIN
1
TEST CONDITIONS
MIN 2.74
TYP 3.0 3.1 125
MAX 5.5 4.0
UNIT V mA A k k
No signal Power down mode 50 10 40 2.0 Pin 6 -50
Input impedance COMPIN, MICIN EXPIN2 Noise cancellation current DC offset NCANOUT3
50
60
k k A
25 -3.0 50
VOS
mV
NOTES: 1. Compressor is tested in production with 50k load. 2. Not tested in production. 3. Offset values are identical for both gain states of noise reduction circuit. 4. Operational down to VCC = 2V.
AC ELECTRICAL CHARACTERISTICS
TA = 25oC, VCC = +3.0V, 0dB level = 77.5mVRMS. See test circuit, Figure 6. SYMBOL PARAMETER Preamplifier gain range Preamplifier voltage gain 0dB Preamplifier voltage gain 40dB Preamplifier noise density TEST CONDITIONS Pin 2 open Pin 2 AC ground Pin 2 AC grounded RS = 50k unweighted 20Hz-20kHz weighted CCIR DIN45405 20-20kHz Switch amplifier gain Compandor 1kHz, all tests1 COMPOUT COMPOUT COMPOUT COMPOUT COMPOUT EXPOUT EXPOUT EXPOUT Compressor error at -21dB output level Compressor error at -10dB output level Compressor error at 0dB output level Compressor error at +5dB output level Compressor error at +10dB output level Expandor error at -42dB output level Expandor error at -21dB output level Expandor error at -10dB output level Input level = -42dB Input level = -20dB Input level = 0dB Input level = +10dB Input level = +20dB Input level = -21dB Input level = -10.5dB Input level = -5dB -1.0 -1.0 -1.5 -1.0 -1.0 -1.0 -1.0 -1.0 -0.16 -0.11 +0.1 +0.04 +0.02 -0.12 +0.1 +0.03 1.0 1.0 1.5 1.0 1.0 1.0 1.0 1.0 dB dB dB dB dB dB dB dB 9 LIMITS MIN 0 -1.0 39.0 TYP 0 40 MAX 40 1.0 41.0 UNIT dB dB dB
7 8 10 11
nV/Hz nV/Hz dB
1997 Nov 07
4
Philips Semiconductors
Product specification
Audio processor - companding, VOX and amplifier section
SA5752
AC ELECTRICAL CHARACTERISTICS (Contineud)
LIMITS SYMBOL EXPOUT EXPOUT EXPOUT EXPOUT EXPOUT PARAMETER Expandor error at 0dB output level Expandor error at +10dB output level Expandor error at +20dB output Expandor VOS Expandor output DC shift Timing capacitors compandor THD Total harmonic distortion Compressor Expandor NCANOUT 1kHz, 0dB BW=300-3kHz 1kHz, 0dB BW=300-3kHz 1kHz. Pin 2 open output level = 0dB 1kHz, Pin 2 open output level = +20dB VOXOUT Sink current Low level High level VOXCTL Input current Low High Input level HPDN Input current Low High Low High Input level Low High Open collector 0.5mA IL = VCC -50 -10 0 0.7VCC -10 -10 0 0.7VCC 10 -4.1 -0.2 -6.6 -0.02 0 +10 0.3VCC VCC +10 +10 0.3VCC VCC 0.2 0.1 0.02 0.06 1 1 1 1 0.5 0.4 % % % % mA V V A A V V A A V V F level2 TEST CONDITIONS Input level = 0dB Input level = +5dB Input level = +10dB No signal No signal to 0dB MIN -1.5 -1.0 -1.0 -50.0 -100 TYP -0.2 +0.03 -0.1 +3.0 +2.0 2200 MAX 1.5 1.0 1.0 50.0 100 UNIT dB dB dB mV mV nF
Reference filter capacitor NOTE: 1. Measurements are relative to 0dB output. 2. Measurement is indicative of the output dynamic range capability.
1997 Nov 07
5
Philips Semiconductors
Product specification
Audio processor - companding, VOX and amplifier section
SA5752
Companding and Amplifier Section SA5752
PREAMP MICROPHONE NOISE CANCEL
Filter and Control Section SA5753
TX BANDPASS FILTER
SUMMING AMP
AUDIO TO TRANSMITTER
GAIN CONTROL VOX VOX OUTPUT TX PRE- EMPHASIS COMPRESSOR TX LOW PASS FILTER
RX DE- EMPHASIS
RX BANDPASS FILTER AUDIO FROM RECEIVER DEMODULATOR
EXPANDOR DTMF GENERATOR HEADPHONE PA ATTENUATOR PA SPEAKER I2C BUS INTERFACE
CLOCK 1.2MHz
FROM SYSTEM CONTROLLER I 2 C BUS
TDA7050T
VOX CONTROL
SR00661
Figure 3. Typical Configuration of Audio Processor (APROC) System Chip Set
1997 Nov 07
6
Philips Semiconductors
Product specification
Audio processor - companding, VOX and amplifier section
SA5752
RXCLOCK DEMOD DATA DATA BLOCK TXEN RXDATA TXCLOCK TXDATA DATA PROCESSOR 5V 7.5V 5.0/0V 7.5/0V POWER SUPPLY
DCLOCK
DATA IN
WSYNC
SERV
DATA
DEMOD
RF BLOCK MOD
BUSY
FVC
AUDIO BLOCK
LOGIC UNIT
POWER SUPPLY ENABLE
VOX I2C SPEAKER
8
MIC EAR
CONTROL UNIT
SR00653
Figure 4. Cellular Radio System
DEMOD DATA DATA PROCESSOR TXEN
5V 7.5V 5.0/0V 7.5/0V POWER SUPPLY
DATA
DEMOD
RF BLOCK MOD
NE5750
NE5751
LOGIC UNIT
POWER SUPPLY ENABLE
VOX I2C SPEAKER
8
RSSI EAR
MIC
CONTROL UNIT
SR00654
Figure 5. APROC Application Diagram
1997 Nov 07
7
Philips Semiconductors
Product specification
Audio processor - companding, VOX and amplifier section
SA5752
SIDE TONE
PREAMP MICIN 220nF NOISE CANCEL BUFFER NCANOUT 20 220nF
1
PREAMPGRES Avset
+ 2 4.7F 19 220nF
COMPIN
RECTGRES
39.2k 3 220nF VOX
COMPRESSOR
+ 18 220nF
COMPCAP3
NCANCAP 1F
+ 4 130k 17
+ 2.2F
COMPCAP1
VOXOUT
COMPOUT 5 16 +
VOXTR
2.2F 11.2k 6 15 COMPCAP2
GND
7
14
VOXCTL
VREF + 10F
HPDN 8 BANDGAP VOLTAGE REF + 9 EXPANDOR 12 2.2F EXPIN 13
VCC
EXPCAP + 2.2F
10
11 220nF
EXPOUT
SR00662
Figure 6. SA5752 Test and Application Circuit
1997 Nov 07
8
1997 Nov 07
TX S12 S11 SIDE TONE S1 TXBPF IN TXLPF 1 S12 S13 2 ATTN 3 S3 PRE EMPH IN 3 COMPCAP1 S2 C10 33nF 0.1 F S2 S4 4 V DD ATTN 2 I2C R8B1 Tx MUTE R0B4 17 SDA PREEMPH AND SOFT LIM ATTN 1 V REF DATA 19 TX MUTE 18 IN TXBPF TXBPF OUT MUTE TX ATTN 4 C14 NCAN OUT 220nF 19 220nF C12 COMP 18 220nF C11 17 + 2.2 F COMPOUT + C9 2.2 F 5 VOX CTL 6 HPDN I2C R5B1 DTMF GEN S6 CLOCK 12 EXP C7 11 220nF EXPOUT SA5752 C16 220nF C15 220nF EAR OUT 10 S10 RX DEMOD IN SPKR OUT 9 AUDIO IN 8 + 2.2 F S7 S8 S7 S8 S5 RXBPF Rx MUTE R0B5 I2C R8B3 S9 ATTN 6 ATTN 7 11 MUTE RX RX 12 MUTE 13 DFT EXP IN 7 C8 DE EMPH OUT DEEMPH 14 1.2MHz IN I2C R8B7 S4 I 2 C INTERFACE AND 14 VOX CTL REGISTERS 15 GND 16 SCL 15 COMP CAP2 COMP CAP3 C13 COMP IN 20 OUT 20 BUFFER
Philips Semiconductors
PREAMP
MIC IN
C1
1
220nF
NOISE CANCEL
PREAMPGRES
C2 +
2
R1 Avset
4.7 F
RECTGRES
R2
3
39.2k C3 220nF 1 F C4 + NCAN CAP 4
VOX
R3 16
130k
VOXOUT
5
R4
VOXTR
6
11.2k
Audio processor - companding, VOX and amplifier section
Figure 7. Application Diagram for the Audio Processor
9
13 HPDN TDA7050T
GND
7
VREF
10 F
+ C5
8
BANDGAP VOLTAGE
VCC
9
REF
EXPCAP
+
10
C6
2.2 F
SA5752
SA5753
Product specification
SR00663
Philips Semiconductors
Product specification
Audio processor - companding, VOX and amplifier section
SA5752
TYPICAL PERFORMANCE CHARACTERISTICS
Power Down Supply Current vs Temperature and Supply Voltage
0.40 POWER DOWN SUPPLY CURRENT (mA) 0.35 0.30 0.25 0.20 0.15 0.10 0.05 VCC = 3V VCC = 2.7V VCC = 2V 10 20 30 40 50 60 70 80 90 100
Supply Current vs Temperature and Supply Voltage
4.00 3.75 SUPPLY CURRENT (mA) 3.50 3.25 3.00 2.75 2.50 2.25 2.00 -50 -40 -30 -20 -10 0 VCC = 5.5V VCC = 3V VCC = 2.7V VCC = 2V
VCC = 5.5V
10 20 30 40 50 TEMPERATURE (C)
60
70
80
90
100
0.00 -50 -40 -30 -20 -10 0
TEMPERATURE (C)
THD vs Temperature for 3V Supply
1.0 0.9 0.8 0.7 THD (%) 0.6 0.5 0.4 0.3 COMPRESSOR 0.2 0.1 0.0 -50 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 EXPANDOR -0.6 -0.8 -1.0 -45 -40 -35 -30 -25 -20 -15 -10 -5 OUTPUT ERROR (dB)
Compandor Tracking Error vs Input Level
1.0 0.8 0.6 0.4 0.2 0.0 -0.2 -0.4 COMPRESSOR EXPANDOR
0
5
10
15
20
25
TEMPERATURE (C)
INPUT LEVEL (dB)
1.5 1.25 UNITY GAIN ERROR (dB)
Unity Gain Error vs Temperature
Unity Gain Error vs Supply Voltage
1.5 1.25 UNITY GAIN ERROR (dB) 1.00 0.75 0.50 0.25 0.00 -0.25 -0.50 -0.75 -1.00 -1.25 -1.50 COMPRESSOR EXPANDOR
1.00 0.75 0.50 0.25 0.00 EXPANDOR COMPRESSOR
-0.25 -0.50 -0.75 -1.00 -1.25 -1.50
-50 -40 -30 -20 -10 0 10 20 30 40 TEMPERATURE (C)
50
60
70
80
90
100
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
SUPPLY VOLTAGE (V)
SR00664
Figure 8. Typical Performance Characteristics
1997 Nov 07
10
Philips Semiconductors
Product specification
Audio processor - companding, VOX and amplifier section
SA5752
TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
Noise Cancellation Switching Amplifier
DYNAMIC RESPSONSE 1 30.0mV/div
MICIN
PIN 1
4
30.0mV/div NCANOUT PIN 20
50.0ms/div STOP MARKER: START MARKER: t: 11.960 ms 0.00000 s 11.960 ms
Voice Activated Transmitter (VOX)
DYNAMIC RESPSONSE 1 30.0mV/div
NCANOUT
PIN 20
3
1.00V/div
VOXOUT VOXCTL
PIN 5 = LOW
50.0ms/div STOP MARKER: START MARKER: t:
120.000 ms 0.00000 s 120.000 ms
SR00665
Figure 9. Typical Performance Characteristics (cont.)
1997 Nov 07
11
Philips Semiconductors
Product specification
Audio processor -- companding, VOX and amplifier section
SA5752
SSOP20: plastic shrink small outline package; 20 leads; body width 4.4 mm
SOT266-1
1997 Nov 07
12
Philips Semiconductors
Product specification
Audio processor -- companding, VOX and amplifier section
SA5752
DEFINITIONS
Data Sheet Identification
Objective Specification
Product Status
Formative or in Design
Definition
This data sheet contains the design target or goal specifications for product development. Specifications may change in any manner without notice. This data sheet contains preliminary data, and supplementary data will be published at a later date. Philips Semiconductors reserves the right to make changes at any time without notice in order to improve design and supply the best possible product. This data sheet contains Final Specifications. Philips Semiconductors reserves the right to make changes at any time without notice, in order to improve design and supply the best possible product.
Preliminary Specification
Preproduction Product
Product Specification
Full Production
Philips Semiconductors and Philips Electronics North America Corporation reserve the right to make changes, without notice, in the products, including circuits, standard cells, and/or software, described or contained herein in order to improve design and/or performance. Philips Semiconductors assumes no responsibility or liability for the use of any of these products, conveys no license or title under any patent, copyright, or mask work right to these products, and makes no representations or warranties that these products are free from patent, copyright, or mask work right infringement, unless otherwise specified. Applications that are described herein for any of these products are for illustrative purposes only. Philips Semiconductors makes no representation or warranty that such applications will be suitable for the specified use without further testing or modification. LIFE SUPPORT APPLICATIONS Philips Semiconductors and Philips Electronics North America Corporation Products are not designed for use in life support appliances, devices, or systems where malfunction of a Philips Semiconductors and Philips Electronics North America Corporation Product can reasonably be expected to result in a personal injury. Philips Semiconductors and Philips Electronics North America Corporation customers using or selling Philips Semiconductors and Philips Electronics North America Corporation Products for use in such applications do so at their own risk and agree to fully indemnify Philips Semiconductors and Philips Electronics North America Corporation for any damages resulting from such improper use or sale. Philips Semiconductors 811 East Arques Avenue P.O. Box 3409 Sunnyvale, California 94088-3409 Telephone 800-234-7381 (c) Copyright Philips Electronics North America Corporation 1997 All rights reserved. Printed in U.S.A.
Philips Semiconductors
1997 Nov 07 13

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