SM6452BM

SM6452AM/BM NIPPON PRECISION CIRCUITS INC. Audio Variable Volume ICs OVERVIEW The SM6452AM/BM are serial-control electronic variable volume ICs for audio applications. They provide electronic volume control for 6 channels, with independent channel gain, attenuation and muting. They feature enhanced digital zip noise suppression. The serial control options are 3-wire interface (SM6452AM) and I2C bus (SM6452BM). The SM6452AM/BM are available in 24-pin SSOP packages. FEATURES s PINOUT pre lim ina AVDD1 VREF1 AIN1 AIN2 AIN3 AIN4 AIN5 AIN6 1 s s s s s s s 6-channel input/output (positive-phase-sequence output) Attenuation function 6-channel independent control +16 to 0 to −79dB variable range 1.0 dB/step adjustment Mute function Microcontroller interface 3-wire serial data interface (SM6452AM) I2C bus format 2-wire control (SM6452BM)*1 I2C address = 1000000 Low noise ≤ 0.002% THD + noise ≤ 10µVrms residual noise 0.5AVDD analog reference voltage source built-in Power supply 7 to 13V analog supply 2.7 to 5.5V digital supply Molybdenum-gate CMOS process 24-pin SSOP SM6452AM ORDERING INFORMATION D e vice SM6452BM P ackag e SM6452AM SM6452BM 24-pin SSOP 24-pin SSOP *1. I2C bus is a registered trademark of Philips Electronics N.V. NIPPON PRECISION CIRCUITS—1 ry Top view 24 AVDD2 VREF2 AOUT1 AOUT2 AOUT3 AOUT4 AOUT5 AOUT6 AVSS2 DVSS MCK MLEN S M 6 4 5 2 AM AVSS1 MDT DVDD RSTN 12 13 Top view AVDD1 VREF1 AIN1 AIN2 AIN3 AIN4 AIN5 AIN6 1 24 ...