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CAT522

Part Number	CAT522
Manufacturer	Catalyst Semiconductor
Description	8-Bit Dual Digital POT With Independent Reference Inputs
Published	Mar 23, 2005
Detailed Description	Advanced Information CAT522 8-Bit Dual Digital POT With Independent Reference Inputs FEATURES s Buffered Outputs s Outp...
Datasheet	CAT522 PDF File

Overview

Advanced Information CAT522 8-Bit Dual Digital POT With Independent Reference Inputs FEATURES s Buffered Outputs s Output settings retained without power s Independent Reference Inputs s Output range includes both supply rails s Programming voltage generated on-chip s 2 independently addressable outputs s Serial µP interface s Single supply operation: 2.
7V-5.
5V APPLICATIONS s Automated product calibration.
s Remote control adjustment of equipment s Offset, gain and zero adjustments in Self- Calibrating and Adaptive Control systems.
s Tamper-proof calibrations.
DESCRIPTION The CAT522 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 telephones on automated high volume production lines and systems capable of self calibration, it is also well suited for applications were equipment requiring periodic adjustment is either difficult to access or located in a hazardous environment.
The CAT522 offers 2 independently programmable DACs each having its own reference inputs and each capable of rail to rail output swing.
Outputs are buffered by rail to rail OP AMPS Output settings, stored in 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 FUNCTIONAL DIAGRAM VDD and stored settings can be read back without disturbing the DAC’s output.
Control of the CAT522 is accomplished with a simple 3 wire serial interface.
A Chip Select pin allows several CAT522's to share a common serial interface and communications back to the host controller is via a single serial data line thanks to the CAT522’s Tri-Stated Data Output pin.
A RDY/BSY output working in concert with an internal low voltage detector signals proper operation of EEPROM Erase/Write cycle.
The CAT522 operate...

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