LTC1329-10 Datasheet | Linear Technology

LTC1329-10/ LTC1329-50/LTC1329A-50 Micropower 8-Bit Current Output D/A Converter Features s DESCRIPTION The LTC ®1329-10/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 municate 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. , LTC and LT are registered trademarks of Linear Technology Corporation. Triple Mode is a trademark of Linear Technology Corporation. s s s s s s s s s Guaranteed Precision Full-Scale DAC Output Current at 25°C: LTC1329A-50 50µA ±1% LTC1329-10 10µA ±3% LTC1329-50 50µA ±3% Wide Output Voltage DC pliance: - 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 TM Interface Modes 1. Standard 3-Wire Mode 2. Pulse Mode 1-Wire Interface: Increment-Only 3. 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 U APPLICATIONS s s s s s LCD Contrast...