DA9116.005
22 November, 2005
MAS9116
Stereo Digital Volume Control
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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
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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
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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)
MAS [ MICRO ANALOG SYSTEMS ]
