MAS9116

www.DataSheet4U.com DA9116.005 22 November, 2005 MAS9116 Stereo Digital Volume Control DESCRIPTION MAS9116 is a stereo volume control for audio systems, which require high output voltages (AC3). It has a 16-bit serial interface, which controls two audio channels. Simple serial interface allows microcontroller to control many MAS9116 chips on the same PCB board. “Clicking” between gain changes is eliminated by changing gain only when zero crossing has been detected from the signal. The use of external operational amplifier provides flexibility for the operating voltage, signal swing, noise floor and cost optimization. Signal Voltage up to ± 18V Two Independent Channels Use of Differential DACs Possible Serial Control Registers FEATURES Zero Detection for Gain Changes Gain Range +15.5db…-111.5dB 0.5 dB Step Size Mute Pin and Register Power On/Off Transient Suppression Signal Peak Level Comparator with Adjustable Reference APPLICATION High End Audio Systems Multichannel Audio Systems BLOCK DIAGRAM RIN R2 VIN R3 R1 RFO RMO RGND ZERO CROSSING PEAK DETECTOR VOUT DATA CCLK XCS XMUTE ZERO CROSSING 8 CONTROL DAC PEAK DETECTOR LIN R2 VIN R3 R1 LFO LMO LGND AGND AVCC DVCC DGND MAS9116 VOUT 1 (17) DA9116.005 22 November, 2005 PIN CONFIGURATIONS SO16 AVCC LMO LFO LIN LGND XCS DVCC XMUTE 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 AGND RMO RFO RIN RGND DGND CCLK DATA QFN 4 x 5 LMO AVCC 1 2 LIN 3 LGND 4 5 6 XCS 7 LFO AGND RMO 19 RFO 18 17 RIN 16 RGND 1...