INTEGRATED CIRCUITS SA576 Low power compandor Product specification IC17 Data Handbook 1997 Aug 14 Philips Semiconductors Product specification Low power compandor SA576 DESCRIPTION PIN CONFIGURATION The SA576 is a unity gain level programmable compandor designed for low power applications. The SA576 is internally configured as an expandor and a compressor to minimize external component count. D and N Packages The SA576 can operate at 1.8V. During normal operations, the SA576 can operate from at least a 2V battery. If the battery voltage drops to 1.8V, this part will still continue to function, however, turning on the part at a VCC of 1.8V requires two external resistors to bring VREF to half VCC. One resistor connects between VCC and VREF; the other connects from VREF to ground. A typical value for these external resistors is approximately 20k. A lower value can be used, but the power consumption will go up. GCELLIN 1 14 VCC RECTIN 2 13 COMPCAP2 EXPCAP 3 12 COMPIN COMPCAP1 4 11 VREF 5 10 RECTIN IREF 6 9 GCELLIN GND 7 8 COMPOUT EXPOUT The SA576 is available in a 14-pin plastic DIP and SO packages. SR00713 FEATURES Figure 1. Pin Configuration • Operating voltage range: 1.8V to 7V • Low power consumption APPLICATIONS (1.4mA @ 3.6V) • Cordless telephone • Consumer audio • Wireless microphones • Modems • Electric organs • Hearing aids • Automatic level control • Over 80dB of dynamic range • Wide input/output swing capability (rail-to-rail) • Low external component count • ESD hardened ORDERING INFORMATION TEMPERATURE RANGE ORDER CODE DWG # 14-Pin Plastic Dual In-Line Package (DIP) DESCRIPTION –40 to +85°C SA576N SOT27-1 14-Pin Plastic Small Outline (SO) –40 to +85°C SA576D SOT108-1 ABSOLUTE MAXIMUM RATINGS RATING SYMBOL VCC TA TSTG θJA 1997 Aug 14 PARAMETER SA576 Supply voltage UNITS 8 V Operating ambient temperature range –40 to +85 °C Storage temperature range –65 to +150 °C 90 125 °C/W °C/W Thermal impedance DIP SO 10–2 853-1536 18287 Philips Semiconductors Product specification Low power compandor SA576 BLOCK DIAGRAM and TEST AND APPLICATION CIRCUIT 10k GAINCELL C1 EXPIN 10k + ∆G 1 R1* RECTIFIER 14 Σ 10µF 10k COMPCAP2 5k 13 2 RECTIN 30k EXPCAP + C2 30k C8 2.2µF + C7 10k + 12 3 2.2µF VCC COMPIN 10µF EXPANDOR C3 COMPCAP1 + EXPOUT VREF 4 11 Σ 10µF C4 + C6 2.2µF RECTIFIER 10k 8.6k + 10 5 10µF RECTIN R3* VREF 10k BANDGAP 6 IREF R2* VCC COMPRESSOR ∆G 9 GCELLIN 10µF GAINCELL GND + 8 7 + C5 C9 COMPOUT 10µF GND *R1, R2 and R3 are 1% resistors. SR00714 Figure 2. Block Diagram and Test and Application Circuit 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 SA576 Supply current No signal R2 = 100kΩ Reference voltage2 VCC = 3.6V TYP MAX 2 3.6 7 V 1.4 3 mA 1.8 Summing amp output load Total harmonic distortion ENO Expandor output noise voltage 0dB Unity gain level VOS Output voltage offset V 10 kΩ 1kHz, 0dB, BW = 3.5kHz 0.25 1.5 % BW = 20kHz, RS = 0Ω 10 30 µV 0dB at 1kHz –1.5 0.18 1.5 dB 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 Crosstalk, COMP to EXP 1kHz, 0dB, CREF = 10µF –80 Output swing low 0.2 Output swing high VCC – 0.2 NOTE: 1. Operation down to VCC = 1.8V is possible, see description on front page of SA576 data sheet. 2. Reference voltage, VREF, is typically at 1/2 VCC. 1997 Aug 14 UNITS MIN Supply voltage1 THD VO TEST CONDITIONS 10–3 dB V Philips Semiconductors Product specification Low power compandor SA576 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 Aug 14 10–4 0 20 40 60 TEMPERATURE (°C) SR00715 Philips Semiconductors Product specification Low power compandor SA576 DIP14: plastic dual in-line package; 14 leads (300 mil) 1997 Aug 14 5 SOT27-1 Philips Semiconductors Product specification Low power compandor SA576 SO14: plastic small outline package; 14 leads; body width 3.9 mm 1997 Aug 14 6 SOT108-1 Philips Semiconductors Product specification Low power compandor SA576 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 Aug 14 7