NE577

Philips Semiconductors RF Communications Products Product specification Unity gain level programmable low power compandor NE/SA577 DESCRIPTION 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. APPLICATIONS communications • High performance portable • Cellular radio • Cordless telephone • Consumer audio • Wireless microphones • Modems • Electric organs • Hearing aids • Automatic level control (ALC) PIN CONFIGURATION D and N Packages GCELL- 1 2 3 4 14 13 12 11 10 9 8 VCC COMPCAP2 COMPIN COMPCAP1 RECTIN GCELLIN COMPOUT IN RECTIN EXPEXPCAP OUT FEATURES • Operating voltage range: 1.8V to 7V • Low power consumption (1.4mA @ 3.6V) VREF 5 IREF GND 6 7 • 0dB level programmable • Over 90dB of dynamic range • Wide input/output swing capability (rail-to-rail) (10mVRMS to 1.0VRMS) • Low external component count • SA577 meets cellular radio specifications • ESD hardened ORDERING INFORMATION DESCRIPTION 14-Pin Plastic Dual In-Line Package (DIP) 14-Pin Plastic Small Outline (SO) 14-Pin Plastic Dual In-Line Package (DIP) 14-Pin Plastic Small Outline (SO) TEMPERATURE RANGE 0 to +70°C 0 to +70°C –40 to +85°C –40 to +85°C ORDER CODE NE577N NE577D SA577N SA577D DWG # 0405B 0175D 0405B 0175D ABSOLUTE MAXIMUM RATINGS SYMBOL PARAMETER RATING NE577 VCC TA TSTG θJA Supply voltage Operating ambient temperature range Storage temperature range Thermal impedance DIP SO 8 0 to +70 –65 to +150 90 125 SA577 8 –40 to +85 –65 to +150 90 125 V UNITS °C °C °C/W °C/W December 15, 1993 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 MIN VCC ICC VREF RL THD ENO 0dB Supply voltage1 Supply current Reference voltage2 Summing amp output load Total harmonic distortion Expandor output noise voltage Unity gain level Programmable range3 1kHz, 0dB, BW = 3.5kHz BW = 20kHz, RS = 0Ω 0dB at 1kHz R1 = R3 = 18.7kΩ, R2 = 24.3kΩ R1 = R3 = 22.6kΩ, R2 = 100kΩ R1 = R3 = 7.15kΩ, R2 = 100kΩ R1 = R3 = 1.33kΩ, R2 = 200kΩ VOS Output voltage offset Expandor output DC shift Tracking error relative to 0dB output Crosstalk, COMP to EXP VO Output swing low Output swing high No signal No signal to 0dB -20dB expandor 1kHz, 0dB, CREF = 10µF –150 –100 –1.0 –1.5 No signal R2 = 100kΩ VCC = 3.6V 1.7 10 0.25 10 0.18 0 –10 –20 –40 1 7 0.3 –80 0.2 VCC – 0.2 150 100 1.0 –65 1.5 25 1.5 2 NE/SA577 TYP 3.6 1.4 1.8 MAX 7 2 1.9 V mA V kΩ % µV dB dBV dBV dBV dBV mV mV dB dB V V UNITS 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 EXPIN C1 + 10µF R1* RECTIFIER RECTIN EXPCAP + C2 2.2µF C3 + EXPOUT VREF C4 + 10µF 10k 5k COMPCAP2 GAINCELL 10k 1 ∆G Σ 14 VCC 2 30k 30k 10k 13 C7 + C8 2.2µF 3 EXPANDOR 12 + 10µF COMPCAP1 COMPIN 4 10µF Σ 10k 8.6k RECTIFIER 11 + C6 2.2µF 5 VREF BANDGAP 10k VCC GND COMPRESSOR ∆G GAINCELL 10 RECTIN R3* 6 R2* IREF 9 10µF GCELLIN + C5 + C9 10µF COMPOUT 7 GND 8 *R1, R2 and R3 are 1% resistors. December 15, 1993 4 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 SUPPLY VOLTAGE 1.6 SUPPLY CURRENT vs TEMPERATURE 1.8 1.5 1.6 1.4 SUPPLY CURRENT (mA) 1.4 SUPPLY CURRENT (mA) 1.3 1.2 1.2 1 0.8 1.1 0.6 1 2 3 4 5 6 SUPPLY VOLTAGE (V) 7 8 1 -40 -20 0 20 40 60 AMBIENT TEMPERATURE (°C) 80 100 0.6 UNITY GAIN ERROR vs SUPPLY VOLTAGE 0.6 NOTE: UNITY GAIN ERROR MAY BE SET TO 0 AT ANY VCC BY ADJUSTING THE VALUE OF R1, R3 0.4 EXPANDOR UNITY GAIN ERROR vs TEMPERATURE 0.4 EXPANDOR 0.2 UNITY GAIN ERROR (dB) 0.2 UNITY GAIN ERROR (dB) 0 COMPRESSOR 0 COMPRESSOR -0.2 -0.2 -0.4 -0.4 -0.6 2 3 4 5 SUPPLY VOLTAGE (V) 6 7 -0.6 -40 -20 0 20 40 60 TEMPERATURE (°C) 80 100 TRACKING ERROR vs INPUT LEVEL 1 NOTE: RELATIVE TO UNITY GAIN 0.5 THD vs TEMPERATURE COMPRESSOR 0.5 EXPANDOR OUTPUT ERROR (dB) 0.4 0 COMPRESSOR THD (%) 0.3 EXPANDOR -0.5 0.2 -1 2 3 4 INPUT LEVEL (dB) 5 6 0.1 -40 -20 0 20 40 60 TEMPERATURE (°C) 80 100 December 15, 1993 5