NJM2173V

j NJM2173A LOW VOLTAGE MICROPHONE AMPLIFIER for PORTABLE AUDIO s GENERAL DESCRIPTION The NJM2173 is a low voltage microphone amplifier designed for portable audio items. It includes standby, two-type gain selector, and power ripple rejection adjustment circuit. It realizes very low turn-noise at standby mode. It is suitable for portable Mini-Disc, portable Compact-Disc, and other microphone amplifier application. s FEATURES q Operating Voltage Range 2.7 to 4.5V + q Operating Current 2.2mA typ. at V =2.7V q Supply Current in Standby Mode 1µA max. q Maximum Output Voltage -1.5dBV typ. at THD=0.1% q Internal Two-type Gain Select Function 13dB typ./ 29dB typ. q Internal Standby Function q Power Ripple Rejection Terminal 95dB typ. at Gv=13dB q Bipolar Technology q Package Outline SSOP14 s PIN CONFIGURATION 1 2 3 4 5 6 7 14 13 12 11 10 9 8 s PACKAGE OUTLINE NJM2173V PIN FUNCTION + 1. OUT 1 8. V 9. STBY 2. DC CUT 1 10. Gv 3. IN 1 + + 11. MIC V 2 4. MIC V 1 5. REG 12. IN 2 6. NOISE 13. DC CUT 2 7. GND 14. OUT 2 NJM2173V s BLOCK DIAGRAM OUT1 1 AMP1 AMP2 14 O U T 2 13 D C C U T2 12 IN 2 11 M IC V + 2 Gv REG DC CUT1 2 IN 1 3 M IC V + 1 4 REG 5 N O IS E 6 GND 7 10 G v 9 STBY 8 V+ j s ABSOLUTE MAXIMUM RATINGS (Ta=25°C) PARAMETER SYMBOL + Supply Voltage V Maximum Input Voltage VIN Power Dissipation PD Operating Temperature Range Topr Storage Temperature Range Tstg RATINGS 5 (3,12pin) -0.3 to VREG+0.3 300 -20 to +75 -40 to +125 NJM2173A UNIT V V mW °C °C s ELECRRICAL CHARACTERI...