Philips Semiconductors RF Communications Products Product specification Unity gain level programmable low power compandor DESCRIPTION APPLICATIONS The NE/SA577 is a unity gain level programmable compandor designed for low power applications. The NE577 is internally configured as an expandor and a compressor to minimize external component count. The NE577 is available in a 14-pin plastic DIP and SO packages. FEATURES • Operating voltage range: 1.8V to 7V • Low power consumption (1.4mA @ 3.6V) • 0dB level programmable NE/SA577 PIN CONFIGURATION • High performance portable D and N Packages communications • Cellular radio • Cordless telephone • Consumer audio • Wireless microphones • Modems • Electric organs • Hearing aids • Automatic level control (ALC) GCELL- 1 14 VCC IN RECTIN 2 13 COMPCAP2 EXP- 3 12 COMPIN EXPCAP OUT 4 11 COMPCAP1 VREF 5 10 RECTIN IREF 6 9 GCELLIN GND 7 8 COMPOUT (10mVRMS to 1.0VRMS) • Over 90dB of dynamic range • Wide input/output swing capability (rail-to-rail) • Low external component count • SA577 meets cellular radio specifications • ESD hardened ORDERING INFORMATION DESCRIPTION TEMPERATURE RANGE ORDER CODE DWG # 14-Pin Plastic Dual In-Line Package (DIP) 0 to +70°C NE577N 0405B 14-Pin Plastic Small Outline (SO) 0 to +70°C NE577D 0175D 14-Pin Plastic Dual In-Line Package (DIP) –40 to +85°C SA577N 0405B 14-Pin Plastic Small Outline (SO) –40 to +85°C SA577D 0175D ABSOLUTE MAXIMUM RATINGS SYMBOL VCC TA TSTG θJA PARAMETER RATING Supply voltage Operating ambient temperature range Storage temperature range Thermal impedance December 15, 1993 DIP SO UNITS NE577 SA577 8 8 V 0 to +70 –40 to +85 °C –65 to +150 –65 to +150 °C 90 125 90 125 °C/W °C/W 2 853-1535 11649 Philips Semiconductors RF Communications Products Product specification Unity gain level programmable low power compandor NE/SA577 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 PARAMETER TEST CONDITIONS VCC Supply voltage1 ICC Supply current No signal R2 = 100kΩ Reference voltage2 VCC = 3.6V VREF RL Summing amp output load THD Total harmonic distortion ENO Expandor output noise voltage 0dB Unity gain level Programmable range3 VOS Output voltage offset UNITS MIN TYP MAX 2 3.6 7 V 1.4 2 mA 1.8 1.9 1.7 10 V kΩ 1kHz, 0dB, BW = 3.5kHz 0.25 1.5 % BW = 20kHz, RS = 0Ω 10 25 µV 0.18 1.5 0dB at 1kHz –1.5 dB R1 = R3 = 18.7kΩ, R2 = 24.3kΩ 0 dBV R1 = R3 = 22.6kΩ, R2 = 100kΩ –10 dBV R1 = R3 = 7.15kΩ, R2 = 100kΩ –20 dBV 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 NE/SA577 1kHz, 0dB, CREF = 10µF Output swing low 0.2 V Output swing high VCC – 0.2 V NOTE: 1. Operation down to VCC = 1.8V is possible, see application note AN1762. 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. December 15, 1993 3 Philips Semiconductors RF Communications Products Product specification Unity gain level programmable low power compandor NE/SA577 BLOCK DIAGRAM and TEST AND APPLICATION CIRCUIT 10k GAINCELL C1 EXPIN 10k + 1 10µF ∆G 14 Σ R1* RECTIFIER 10k COMPCAP2 5k 13 2 RECTIN 30k EXPCAP + C2 VCC 30k C7 10k + 12 3 2.2µF C8 2.2µF + COMPIN 10µF EXPANDOR C3 COMPCAP1 + 4 EXPOUT VREF 11 Σ 10µF 10k C4 + C6 2.2µF RECTIFIER 8.6k + 10 5 10µF RECTIN R3* VREF 10k BANDGAP 6 R2* IREF VCC COMPRESSOR ∆G 9 10µF GAINCELL GND 8 7 GCELLIN + C5 + C9 10µF GND *R1, R2 and R3 are 1% resistors. December 15, 1993 4 COMPOUT Philips Semiconductors RF Communications Products Product specification Unity gain level programmable low power compandor NE/SA577 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 0.2 0.2 UNITY GAIN ERROR (dB) UNITY GAIN ERROR (dB) 80 0 COMPRESSOR -0.2 0 COMPRESSOR -0.2 -0.4 -0.4 -0.6 -0.6 2 3 4 5 SUPPLY VOLTAGE (V) 6 7 -40 -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 INPUT LEVEL (dB) December 15, 1993 5 -20 0 20 40 60 TEMPERATURE (°C)