DA9181.006
13 October, 1999
MAS9181B/C
OCTAL 8-BIT TRIMMER IC
· Eight discrete DACs
2
· I C-bus slave receiver
· Voltage output
DESCRIPTION
The MAS9181 comprises eight digital to analog
converters (DACs) each controlled by a two-wire I
2
C
bus. The DACs are individually programmed using an 8-
bit word to select an output from one of 256 voltage
steps. The maximum output voltage of all DACs is set
by Vmax and the resolution is Vmax/256. At power-on all
outputs are set to their lowest value. The I
2
C-bus slave
receiver has 3 programmable address pins (2 for
MAS9181 CS).
FEATURES
· Rail to rail output stages
· Octal 8-bit DACs on a single monolithic chip
· Power supply range from +5 V to +12 V
· -20°C to +85°C temperature range
· 16-pin PDIL and SO package
· Power-up reset
APPLICATION
· Trimmer replacement
· AGC/AFT or TVs and VCRs
· Graphic equalizers
· High resolution monitors
BLOCK DIAGRAM
SDA
SCL
A0
A1
A2
I C Bus
Slave
Receiver
2
8-BIT DAC
DAC7
8-BIT DAC
DAC6
DAC5
8-BIT DAC
8-BIT DAC
8-BIT DAC
8-BIT DAC
DAC4
DAC3
DAC2
DAC1
Vmax
Reference
Voltage
Generator
8-BIT DAC
8-BIT DAC
DAC0
VDD GND
1
MAS [ MICRO ANALOG SYSTEMS ]
