ADI LTC1329CS8-50#TRPBF

The LTC1329-10/LTC1329-50/LTC1329A-50 are micropower 8-bit current output D/A converters (DACs) with an output range of 0µA to 10µA for the LTC1329-10 and 0µA to 50µA 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 95µA for the LTC1329-50/LTC1329A-50 and 75µA for LTC1329-10. A shutdown mode drops the supply current to 0.2µA. 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 DIN. LTC1329 is available in 8-pin SO packages.

• Guaranteed Precision Full-Scale DAC Output Current at ±25%: LTC1329A-50 50µA ±1%, LTC1329-10 10µA ±3%, LTC1329-50 50µA ±3%
• Wide Output Voltage DC Compliance: –15V to 2.5V
• Wide Supply Range: 2.7V ≤ VCC ≤ 6.5V
• Supply Current in Shutdown: 0.2µA
• Low Supply Current: 75µA for LTC1329-10, 95µA for LTC1329-50/LTC1329A-50
• Available in 8-Pin SO
• Triple Mode Interface Modes:
  • Standard 3-Wire Mode
  • Pulse Mode 1-Wire Interface: Increment-Only
  • Pulse Mode 2-Wire Interface: Increment/Decrement
• Can Read Back the 8-Bit DAC Value in 3-Wire Mode
• DAC Powers Up at Midrange
• DAC Contents Are Retained in Shutdown

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