8-bit Dual Digital Pot With Independent Reference InputsThe CAT512 is a dual 8-Bit Memory DAC designed as an
electronic replacement for mechanical potentiometers
and trim pots. Intended for final calibration of products
such as camcorders, fax machines and cellular tele-
phones on automated high volume production lines and
systems capable of self calibration, it is also well suited
for applications were equipment requiring periodic ad-
justment is either difficult to access or located in a
hazardous environment.
The CAT512 offers 2 independently programmable DACs
each having its own reference inputs and each capable
of rail to rail output swing. Output settings, stored non-
volatile EEPROM memory, are not lost when the device
is powered down and are automatically reinstated when
power is returned. Each output CAN be dithered to test
new output values without effecting the stored settings
and stored settings CAN be read back without disturbing
the DACs output. Control of the CAT512 is accomplished with a simple 3
wire serial Interface A Chip Select pin allows several
CAT512 's to share a common serial Interface and com-
munications back to the host controller is via a single
serial data line thanks to the CAT512s Tri-Stated Data
Output pin. A RDY/BSYoutput working in concert with
an internal low voltage detector signals proper operation
of EEPROM Erase/Write cycle.
The CAT512 operates from a single 35 volt power
supply. The high voltage required for EEPROM Erase/
Write operations is generated on-chip.
The CAT512 is available in the 0C to 70C Commercial
and 40C to +85C Industrial operating temperature
ranges and offered in 14-pin plastic DIP and Surface
mount packages. By Catalyst Semiconductor
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