LTC1329A-50

· LCD Contrast Control
· Backlight Brightness Control
· Battery Charger Current/Voltage Adjustment
· Power Supply Voltage Adjustment
· Trimmer Pot Elimination

The LTC^®1329-10/LTC1329-50/LTC1329A-50 are micropower 8-bit current output D/A converters (DACs) with an output range of 0A to 10A for the LTC1329-10 and 0A to 50A for the LTC1329-50/LTC1329A-50. The DAC current output can be biased from 15V to 2V or 15V to 2.5V in 3.3V and 5V systems, respectively. Supply current is only 95A for the LTC1329-50/LTC1329A-50 and 75A for LTC1329-10. A shutdown mode drops the  supply current to 0.2A.

The LTC1329 can communicate with external circuitry by using one of three interface modes: standard 3-wire serial mode and two pulse modes. Upon power-up, the internal counter resets to 1000 0000B, the DAC output assumes midrange and the chip is configured in 3-wire or pulse mode depending on the signal level at CS.

In 3-wire mode, the system MPU can serially transfer 8-bit data to and from the LTC1329. In pulse mode, the upper six bits of the DAC output can be programmed for increment- only (1-wire interface) or increment/decrement (2-wire interface) operation depending on the signal level at D_IN.

LTC1329 is available in 8-pin SO packages.