NE570DG ON Semiconductor

NE570 Compandor The NE570 is a versatile low cost dual gain control circuit in which either channel may be used as a dynamic range compressor or expandor. Each channel has a fullwave rectifier to detect the average value of the signal, a linerarized temperaturecompensated variable gain cell, and an operational amplifier. NE570 PIN FUNCTION DESCRIPTION Pin Symbol Description 1 RECT CAP 1 External Capacitor Pinout for Rectifier 1 2 RECT IN 1 Rectifier 1 Input 3 G CELL IN 1 Variable Gain Cell 1 Input 4 GND Ground 5 INV. IN 1 Inverted Input 1 6 RES. R3 1 R3 Pinout 1 7 OUTPUT 1 Output 1 8 THD TRIM 1 Total Harmonic Distortion Trim 1 9 THD TRIM 2 Total Harmonic Distortion Trim 2 10 OUTPUT 2 Output 2 11 RES. R3 2 R3 Pinout 2 12 INV. IN 2 Inverted Input 2 13 V Positive Power Supply CC 14 G CELL IN 2 Variable Gain Cell 2 Input 15 RECT IN 2 Rectifier 2 Input 16 RECT CAP 2 External Capacitor Pinout for Rectifier 2 ELECTRICAL CHARACTERISTICS V = +15 V, T = 25 C unless otherwise stated. CC A Characteristic Test Conditions Symbol Min Typ Max Unit Supply Voltage V 6.0 24 V CC Supply Current No Signal I 4.3 4.8 mA CC Output Current Capability I 20 mA OUT Output Slew Rate SR 0.5 V/ s Gain Cell Distortion (Note 1) Untrimmed 0.3 1.0 % Trimmed 0.05 % Resistor Tolerance 5 15 % Internal Reference Voltage 1.7 1.8 1.9 V Output DC Shift (Note 2) Untrimmed 90 150 mV Expandor Output Noise No signal, 15 Hz to 20 kHz 20 45 V (Note 3) Unity Gain Level (Note 4) 1.0 0 +1.0 dBm Gain Change (Notes 1 and 5) T = 0C to +70C 0.1 0.2 dB A Reference Drift (Note 5) T = 0C to +70C 5.0 10 mV A Resistor Drift (Note 5) T = 0C to +70C +8.0, 5.0 % A Tracking Error (measured relative to value at unity gain) Rectifier Input V = +6.0 V CC equals V V (unity gain) dB V dBm V = +6.0 dBm, V = 0 dB 0.2 dB O O 2 2 1 V = 30 dBm, V = 0 dB +0.2 0.5, +1.0 dB 2 1 Channel Separation 60 dB 1. Measured at 0 dBm, 1.0 kHz. 2. Expandor AC input change from no signal to 0 dBm. 3. Input to V and V grounded. 1 2 4. 0 dB = 775 mV . RMS 5. Relative to value at T = 25C. A