DA8444A.005
May 31, 1996
MAS8444A
OCTAL 6-BIT TRIMMER IC
• Eight discrete DACs
2
• I C-bus slave receiver
• Voltage output
DESCRIPTION
The MAS8444a comprises eight digital to analog
converters (DACs) each controlled by a two-wire I
2
C
bus. The DACs are individually programmed using an
6-bit word to select an output from one of 64 voltage
steps. The maximum output voltage of all DACs is set
by Vmax. At power-on all outputs are set to their lowest
value. The I
2
C-bus slave receiver has 3 programmable
address pins (2 in the SO16 package).
FEATURES
• Rail to rail output stages
• Octal 6-bit DACs on a single monolithic chip
• Power supply range from +5V to +12V
• -25 C to +85 C temperature range
• 16-pin PDIL and SO package
• pin to pin compatibility with TDA8444
APPLICATION
• Trimmer replacement
• Automatic gain control
• High resolution monitors
BLOCK DIAGRAM
¡
SDA 3
SCL 4
A0 5
A1 6
A2 7
I C Bus
Slave
Receiver
2
6-BIT DAC
DAC7
6-BIT DAC
DAC6
DAC5
6-BIT DAC
6-BIT DAC
6-BIT DAC
6-BIT DAC
DAC4
DAC3
DAC2
DAC1
Vmax 2
Reference
Voltage
Generator
6-BIT DAC
6-BIT DAC
DAC0
1
8
VDD GND
1
MAS [ MICRO ANALOG SYSTEMS ]
