RF COMMUNICATIONS PRODUCTS SA578 Unity gain level programmable low power compandor Product specification Replaces data of 1993 December 15 IC17 Data Handbook Philips Semiconductors 1997 Nov 07 Philips Semiconductors Product specification Unity gain level programmable low power compandor DESCRIPTION SA578 PIN CONFIGURATION The SA578 is a unity gain level programmable compandor designed for low power applications. The SA578 is internally configured as an expandor and a compressor to minimize external component count. D Package The summing amplifiers of the SA578 have 600Ω drive capability and the inverting input of the compressor amplifier is accessible through Pin 9 for summing multiple external signals. Power Down/Mute function is active low and requires an open collector output logic configuration at Pin 8. If Power Down/Mute is not needed, Pin 8 should be left open. When the part is muted, supply current drops to 170mA at 3.6V. FEATURES • Operating voltage range: 1.8V to 7V • Low power consumption (1.4mA @ 3.6V) • 0dB level programmable GCELLIN 1 16 VCC RECTIN 2 15 COMPCAP2 EXPCAP 3 14 COMPIN EXPOUT 4 13 COMPCAP1 VREF 5 12 RECTIN IREF 6 11 GCELLIN GND 7 10 COMP OUT PWRDN/ MUTE 8 9 SUM NODE SR00719 Figure 1. Pin Configuration (10mVRMS to 1.0VRMS) • Over 90dB of dynamic range • Wide input/output swing capability • Low external component count • SA578 meets cellular radio specifications • ESD hardened • Power Down mode (ICC = 170µA @ 3.6V) • Mute function • Multiple external summing capability • 600Ω drive capability APPLICATIONS • High performance portable communications • Cellular radio • Cordless telephone • Consumer audio • Wireless microphones • Modems • Electric organs • Hearing aids • Automatic level control (ALC) ORDERING INFORMATION DESCRIPTION 16-Pin Plastic Small Outline (SO) TEMPERATURE RANGE ORDER CODE DWG # –40 to +85°C SA578D SOT109-1 ABSOLUTE MAXIMUM RATINGS SYMBOL VCC TA TSTG θJA 1997 Nov 07 RATING PARAMETER SA578 Supply voltage UNITS 8 V Operating ambient temperature range –40 to +85 Storage temperature range –65 to +150 °C °C 125 °C/W Thermal impedance SO 2 853-1537 18660 Philips Semiconductors Product specification Unity gain level programmable low power compandor SA578 BLOCK DIAGRAM and TEST AND APPLICATION CIRCUIT 10k GAINCELL C1 EXPIN 10k + 1 10µF ∆G 16 Σ R1* RECTIFIER RECTIN 10k COMPCAP2 5k 15 2 30k EXPCAP + C2 30k 14 + COMPIN 10µF EXPANDOR C3 COMPCAP1 + 4 EXPOUT 10µF 13 Σ 10k C4 + C6 2.2µF RECTIFIER 8.6k + 12 5 10µF RECTIN R3* VREF 10k BANDGAP 6 R2* IREF VCC COMPRESSOR GND PWRDN MUTE ∆G 11 GCELLIN + C5 10µF GAINCELL 7 10 8 9 + C9 GND R4 10kΩ PWRDN/ MUTE Figure 2. Block Diagram and Test and Application Circuit 3 COMPOUT 10µF + SUMIN C10 10µF *R1, R2 and R3 are 1% resistors. 1997 Nov 07 C8 2.2µF + C7 10k 3 2.2µF VREF VCC SR00720 Philips Semiconductors Product specification Unity gain level programmable low power compandor SA578 ELECTRICAL CHARACTERISTICS TA = 25°C, VCC = 3.6VDC, compandor 0dB level = –20dBV = 100mVRMS, output load RL = 10kΩ, Freq = 1kHz, unless otherwise specified. R1, R2 and R3 are 1% resistors. LIMITS SYMBOL VCC ICC VREF RL PARAMETER Supply voltage1 Supply current operating power down Reference voltage2 Total harmonic distortion ENO Expandor output noise voltage 0dB Unity gain level Programmable range3 Output voltage offset MIN TYP MAX 2 3.6 7 V 1.4 170 2 mA µA 1.8 1.9 No signal, R2 = 100kΩ VCC = 3.6V UNITS 1.7 V Ω 600 1kHz, 0dB, BW = 3.5kHz 0.25 1.0 % BW = 20kHz, RS = 0Ω 10 20 µV 0.18 1.0 dB 0dB at 1kHz –1.0 R1 = R3 = 18.7kΩ, R2 = 24.3kΩ 0 R1 = R3 = 22.6kΩ, R2 = 100kΩ –10 R1 = R3 = 7.15kΩ, R2 = 100kΩ –20 R1 = R3 = 1.33kΩ, R2 = 200kΩ –40 dBV No signal –150 1 150 mV Expandor output DC shift No signal to 0dB –100 7 100 mV Tracking error relative to 0dB output -20dB expandor –1.0 0.3 1.0 dB –80 –65 dB Crosstalk, COMP to EXP VO SA578 Summing amp minimum output load THD VOS TEST CONDITIONS 1kHz, 0dB, CREF = 10µF Output swing low 0.2 Output swing high VCC – 0.2 Power Down/Mute low level Power Down/Mute input current 0 Pin 8 grounded V 0.4 –65 V µA NOTE: 1. Operation down to VCC = 1.8V is possible. 2. Reference voltage, VREF, is typically at 1/2 VCC. 3. Unity gain level can be adjusted CONTINUOUSLY between –40dBV = 10mVRMS and 0dBV = 1.0VRMS. For details see application note AN1762. 1997 Nov 07 4 Philips Semiconductors Product specification Unity gain level programmable low power compandor SA578 TYPICAL PERFORMANCE CHARACTERISTICS VCC = 3.6V, TA = 25°C, R1=R3=7.15kΩ, R2=100kΩ, 0dB level = 100mV, Freq. = 1kHz SUPPLY CURRENT vs TEMPERATURE SUPPLY CURRENT vs SUPPLY VOLTAGE 1.6 1.8 1.5 1.6 SUPPLY CURRENT (mA) SUPPLY CURRENT (mA) 1.4 1.4 1.2 1 1.2 1.1 0.8 1 0.6 1 0.6 1.3 2 3 4 5 6 SUPPLY VOLTAGE (V) 7 -40 8 UNITY GAIN ERROR vs SUPPLY VOLTAGE -20 0 20 40 60 AMBIENT TEMPERATURE (°C) 100 UNITY GAIN ERROR vs TEMPERATURE 0.6 NOTE: UNITY GAIN ERROR MAY BE SET TO 0 AT ANY VCC BY ADJUSTING THE VALUE OF R1, R3 0.4 0.4 EXPANDOR EXPANDOR UNITY GAIN ERROR (dB) 0.2 UNITY GAIN ERROR (dB) 80 0 COMPRESSOR -0.2 0.2 0 COMPRESSOR -0.2 -0.4 -0.4 -0.6 -0.6 2 3 4 5 SUPPLY VOLTAGE (V) 6 -40 7 -20 TRACKING ERROR vs INPUT LEVEL 0 20 40 60 TEMPERATURE (°C) 80 100 80 100 THD vs TEMPERATURE 0.5 1 NOTE: RELATIVE TO UNITY GAIN COMPRESSOR 0.5 0.4 THD (%) OUTPUT ERROR (dB) EXPANDOR 0 0.3 EXPANDOR COMPRESSOR -0.5 0.2 -1 0.1 2 3 4 5 6 -40 -20 INPUT LEVEL (dB) Figure 3. Typical Performance Characteristics 1997 Nov 07 5 0 20 40 60 TEMPERATURE (°C) SR00715 Philips Semiconductors Product specification Unity gain level programmable low power compandor SO16: plastic small outline package; 16 leads; body width 3.9 mm 1997 Nov 07 6 SA578 SOT109-1 Philips Semiconductors Product specification Unity gain level programmable low power compandor SA578 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 7