RF COMMUNICATIONS PRODUCTS SA5752 Audio processor – companding, VOX and amplifier section Product Specification Replaces data of December 6, 1993 IC17 Data Handbook Philips Semiconductors 1997 Nov 07 Philips Semiconductors Product specification Audio processor – companding, VOX and amplifier section DESCRIPTION SA5752 PIN CONFIGURATION 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. DK PACKAGE MICIN 1 20 NCAN OUT PREAMPGRES 2 19 COMPIN 3 18 COMPCAP3 NCANCAP 4 17 COMPCAP1 RECTGRES VOXOUT 5 VOXTR 6 GND 7 14 VOXCTL VREF 8 13 HPDN VCC 9 12 EXPIN 16 COMPOUT SA5752 EXPCAP 10 FEATURES 15 COMPCAP2 11 EXPOUT • Operating voltage range: 2V to 5.5V SR00659 • Miniature SSOP Figure 1. Pin Configuration • High performance BENEFITS • Adjustable VOX and noise cancellation threshold • Very compact applications • Adjustable gain preamplifier • Long battery life in portable equipment • Audio companding • Complete cellular audio function with the SA5753 • ESD protected • Open collector VOX output APPLICATIONS • Logic inputs CMOS compatible • Cellular radio • Power down mode • Mobile communications • Few external components • High performance cordless telephones • Meets AMPS/TACS/NAMPS/NTACS requirements • 2-way radio ORDERING INFORMATION DESCRIPTION 20-Pin Plastic Shrink Small Outline Package (SSOP) 1997 Nov 07 2 TEMPERATURE RANGE ORDER CODE DWG # -40 to +85°C SA5752DK SOT266-1 853-1721 18666 Philips Semiconductors Product specification Audio processor – companding, VOX and amplifier section SA5752 PIN DESCRIPTIONS PIN NO. SYMBOL DESCRIPTION 1 MICIN 2 PREAMPGRES Microphone input 3 RECTGRES Rectifier gain resistor 4 NCANCAP Noise cancellation timing capacitor 5 VOXOUT Voice operated transmission output 6 VOXTR 7 GND Ground 8 VREF Reference voltage Positive supply Preamplifier gain resistor Voice operated transmission threshold resistor 9 VCC 10 EXPCAP Expandor timing capacitor Expandor output 11 EXPOUT 12 EXPIN Expandor input 13 HPDN Hardware power-down 14 VOXCTL 15 COMPCAP2 Compressor capacitor 2 DC block 16 COMPOUT Compressor output 17 COMPCAP1 Compressor timing capacitor 1 18 COMPCAP3 Compressor capacitor 3 DC block 19 COMPIN 20 NCANOUT Voice operated transmission control Compressor input Noise cancellation output BLOCK DIAGRAM 20 19 18 17 16 15 14 13 12 11 BUFFER EXPANDOR COMPANDOR SA5752 NOISE CANCEL VOX PREAMP 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 PARAMETER VCC Power supply voltage range VIN Voltage applied to any other pin RATING UNIT -0.3 to 6 V -0.3 to (VCC+0.3) V TSTG Storage temperature -65 to +150 oC TA Ambient operating temperature -40 to +85 °C DC ELECTRICAL CHARACTERISTICS TA = 25oC, VCC = +3.0V, 0dB = 77.5mVRMS. See test circuit, Figure 6. LIMITS SYMBOL VCC PARAMETER TEST CONDITIONS Supply voltage Supply current ZL Load impedance pins NCANOUT, EXPOUT 1 COMPOUT ZIN Input impedance COMPIN, MICIN MAX 2.74 3.0 5.5 V 3.1 125 4.0 mA µA Noise cancellation current 50 kΩ 10 kΩ 40 EXPIN2 VOS TYP No signal Power down mode ICC 50 60 kΩ 2.0 Pin 6 kΩ µA 25 DC offset NCANOUT3 UNIT MIN -50 –3.0 50 mV NOTES: 1. Compressor is tested in production with 50kΩ 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 LIMITS MIN TYP MAX 0 -1.0 39.0 0 40 40 1.0 41.0 UNIT dB dB dB Pin 2 AC grounded RS = 50kΩ unweighted 20Hz-20kHz 7 nV/√Hz weighted CCIR DIN45405 20-20kHz 8 nV/√Hz Switch amplifier gain 9 10 11 dB Compandor 1kHz, all tests1 COMPOUT Compressor error at -21dB output level Input level = -42dB –1.0 –0.16 1.0 dB COMPOUT Compressor error at -10dB output level Input level = -20dB -1.0 –0.11 1.0 dB COMPOUT Compressor error at 0dB output level Input level = 0dB -1.5 +0.1 1.5 dB COMPOUT Compressor error at +5dB output level Input level = +10dB -1.0 +0.04 1.0 dB COMPOUT Compressor error at +10dB output level Input level = +20dB -1.0 +0.02 1.0 dB EXPOUT Expandor error at -42dB output level Input level = -21dB –1.0 –0.12 1.0 dB EXPOUT Expandor error at -21dB output level Input level = -10.5dB -1.0 +0.1 1.0 dB EXPOUT Expandor error at -10dB output level Input level = -5dB -1.0 +0.03 1.0 dB 1997 Nov 07 4 Philips Semiconductors Product specification Audio processor – companding, VOX and amplifier section SA5752 AC ELECTRICAL CHARACTERISTICS (Contineud) LIMITS SYMBOL PARAMETER TEST CONDITIONS MIN TYP MAX UNIT EXPOUT Expandor error at 0dB output level Input level = 0dB -1.5 –0.2 1.5 dB EXPOUT Expandor error at +10dB output level Input level = +5dB -1.0 +0.03 1.0 dB level2 EXPOUT Expandor error at +20dB output Input level = +10dB -1.0 –0.1 1.0 dB EXPOUT Expandor VOS No signal -50.0 +3.0 50.0 mV EXPOUT Expandor output DC shift No signal to 0dB -100 +2.0 100 mV Timing capacitors compandor THD VOXOUT HPDN Compressor 1kHz, 0dB BW=300-3kHz 0.2 1 % Expandor 1kHz, 0dB BW=300-3kHz 0.1 1 % NCANOUT 1kHz. Pin 2 open output level = 0dB 0.02 1 % 1kHz, Pin 2 open output level = +20dB 0.06 1 % 0.5 mA 0.4 V V 0 µA Sink current Input current Open collector 0.5mA IL = VCC Low -50 –6.6 –0.02 High -10 Input level Low High 0 0.7VCC Input current Low -10 –4.1 High -10 –0.2 Low High 0 0.7VCC Input level Reference filter capacitor 10 NOTE: 1. Measurements are relative to 0dB output. 2. Measurement is indicative of the output dynamic range capability. 1997 Nov 07 nF Total harmonic distortion Low level High level VOXCTL 2200 5 +10 µA 0.3VCC VCC V V +10 µA +10 µA 0.3VCC VCC V V µF Philips Semiconductors Product specification Audio processor – companding, VOX and amplifier section Companding and Amplifier Section Filter and Control Section SA5752 SA5753 SA5752 PREAMP MICROPHONE NOISE CANCEL TX BANDPASS FILTER SUMMING AMP AUDIO TO TRANSMITTER GAIN CONTROL VOX VOX OUTPUT TX PRE– EMPHASIS TX LOW PASS FILTER RX DE– EMPHASIS RX BANDPASS FILTER COMPRESSOR AUDIO FROM RECEIVER DEMODULATOR EXPANDOR DTMF GENERATOR HEADPHONE PA ATTENUATOR I2C BUS INTERFACE CLOCK 1.2MHz PA FROM SYSTEM CONTROLLER I 2 C BUS SPEAKER VOX CONTROL TDA7050T 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 5V RXDATA DATA PROCESSOR TXCLOCK DATA BLOCK 7.5V TXDATA POWER SUPPLY 5.0/0V TXEN BUSY FVC SERV WSYNC DATA DATA IN DCLOCK 7.5/0V DEMOD RF BLOCK AUDIO BLOCK LOGIC UNIT POWER SUPPLY ENABLE MOD VOX 8 I2C MIC SPEAKER EAR CONTROL UNIT SR00653 Figure 4. Cellular Radio System 5V DEMOD DATA 7.5V DATA PROCESSOR POWER SUPPLY 5.0/0V TXEN 7.5/0V DATA DEMOD RF BLOCK NE5750 LOGIC UNIT NE5751 POWER SUPPLY ENABLE MOD VOX 8 I2C MIC RSSI SPEAKER EAR 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 1 NCANOUT NOISE CANCEL 20 220nF PREAMPGRES BUFFER 220nF + 2 220nF 4.7µF Avset 39.2k RECTGRES COMPIN 19 COMPRESSOR 3 + COMPCAP3 18 220nF 220nF VOX + NCANCAP + 4 COMPCAP1 17 1µF 2.2µF 130k COMPOUT VOXOUT 5 16 + 2.2µF VOXTR 11.2k 6 15 COMPCAP2 GND 7 14 8 13 VOXCTL HPDN VREF + 10µF BANDGAP VOLTAGE REF + VCC 9 2.2µF EXPANDOR EXPCAP + EXPIN 12 10 EXPOUT 11 220nF 2.2µF SR00662 Figure 6. SA5752 Test and Application Circuit 1997 Nov 07 8 1997 Nov 07 R2 4.7 µ F C2 + 220nF C1 3 2 1 9 Figure 7. Application Diagram for the Audio Processor 2.2 µ F EXPCAP VCC 10 µ F VREF GND VOXTR VOXOUT + C6 + C5 11.2k R4 R3 10 9 8 7 6 5 130k 39.2k C3 220nF 1 µ F C4 + NCAN CAP 4 RECTGRES R1 Avset PREAMPGRES MIC IN REF SA5752 BANDGAP VOLTAGE VOX NOISE CANCEL PREAMP EXP COMP BUFFER COMPCAP3 COMPCAP1 C7 EXP IN HPDN VOX CTL C8 V DD EAR OUT SPKR OUT AUDIO IN DE EMPH OUT HPDN VOX CTL 0.1 µ F 33nF C10 PRE EMPH IN TXBPF OUT TXBPF IN 10 9 8 7 6 5 4 3 2 1 S12 S7 S7 S10 S9 S8 S8 S4 S3 ATTN 6 DEEMPH S6 I2C R5B1 I2C R8B7 S2 S2 ATTN 1 TXBPF S1 SA5753 MUTE RX S5 RXBPF DTMF GEN S4 ATTN 2 PREEMPH AND SOFT LIM TXLPF S11 ATTN 7 MUTE TX Tx MUTE R0B4 I2C R8B1 V REF I2C R8B3 Rx MUTE R0B5 REGISTERS AND I 2 C INTERFACE ATTN 3 S13 Σ ATTN 4 IN 1.2MHz CLOCK MUTE IN RX DEMOD 11 12 RX 13 DFT 14 15 GND 16 SCL 17 SDA TX MUTE 18 19 OUT DATA TX 20 IN Audio processor – companding, VOX and amplifier section TDA7050T 220nF C15 220nF C16 + 2.2µ F COMPCAP2 2.2 µ F + COMPOUT + 2.2 µ F C11 220nF C12 220nF EXPOUT 11 12 13 14 15 C13 COMP IN 220nF 220nF C9 16 17 18 19 20 C14 NCAN OUT SIDE TONE S12 Philips Semiconductors Product specification SA5752 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 Supply Current vs Temperature and Supply Voltage 4.00 POWER DOWN SUPPLY CURRENT (mA) 0.40 SUPPLY CURRENT (mA) 3.75 3.50 VCC = 5.5V VCC = 3V 3.25 VCC = 2.7V 3.00 VCC = 2V 2.75 2.50 2.25 2.00 –50 –40 –30 –20 –10 0 10 20 30 40 50 TEMPERATURE (°C) 60 70 80 90 0.35 0.30 0.25 VCC = 5.5V 0.20 0.15 VCC = 3V 0.10 VCC = 2.7V 0.05 VCC = 2V 0.00 –50 –40 –30 –20 –10 0 100 10 20 30 40 50 60 70 80 90 100 TEMPERATURE (°C) THD vs Temperature for 3V Supply Compandor Tracking Error vs Input Level 1.0 1.0 0.9 0.8 0.8 OUTPUT ERROR (dB) 0.6 THD (%) 0.7 0.6 0.5 0.4 0.3 0.4 0.2 EXPANDOR 0.0 –0.2 COMPRESSOR –0.4 COMPRESSOR –0.6 0.2 0.1 EXPANDOR –0.8 –1.0 –45 –40 –35 –30 –25 –20 –15 –10 –5 0.0 –50 –40 –30 –20 –10 0 10 20 30 40 50 60 70 80 90 100 TEMPERATURE (°C) 1.00 UNITY GAIN ERROR (dB) UNITY GAIN ERROR (dB) 1.25 1.00 0.75 0.50 COMPRESSOR 0.00 –0.25 10 15 20 25 1.5 1.25 0.25 5 Unity Gain Error vs Supply Voltage Unity Gain Error vs Temperature 1.5 0 INPUT LEVEL (dB) EXPANDOR –0.50 0.75 0.50 0.25 0.00 –0.25 –0.50 –0.75 –0.75 –1.00 –1.00 –1.25 –1.25 –1.50 EXPANDOR COMPRESSOR –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 4 PIN 1 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 3 50.0ms/div STOP MARKER: START MARKER: ∆t: PIN 20 1.00V/div VOXOUT PIN 5 VOXCTL = LOW 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 SSOP20: plastic shrink small outline package; 20 leads; body width 4.4 mm 1997 Nov 07 12 SA5752 SOT266-1 Philips Semiconductors Product specification Audio processor — companding, VOX and amplifier section SA5752 DEFINITIONS Data Sheet Identification Product Status Definition Objective Specification Formative or in Design This data sheet contains the design target or goal specifications for product development. Specifications may change in any manner without notice. Preliminary Specification Preproduction Product 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. Product Specification Full Production 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. 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. Copyright Philips Electronics North America Corporation 1997 All rights reserved. Printed in U.S.A. Philips Semiconductors 811 East Arques Avenue P.O. Box 3409 Sunnyvale, California 94088–3409 Telephone 800-234-7381 1997 Nov 07 13