DatasheetsPDF.com

LTC1329-50 Dataheets PDF



Part Number LTC1329-50
Manufacturers Linear Technology
Logo Linear Technology
Description Micropower 8-Bit Current Output D/A Converter
Datasheet LTC1329-50 DatasheetLTC1329-50 Datasheet (PDF)

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. .

  LTC1329-50   LTC1329-50



Document
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 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. , 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 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 ModeTM 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 Control Backlight Brightness Control Battery Charger Current/Voltage Adjustment Power Supply Voltage Adjustment Trimmer Pot Elimination TYPICAL APPLICATION Digitally Controlled LCD Bias Generator VIN 5V 47Ω VIN SW1 LT ®1173 FB GND SW2 1N5818 ILIM L1* 100µH 1N4148 200k 0.1µF 1 2 IOUT VCC + 47µF + LTC1329-50 4.7µF 10.1k 1N5818 3 4 SHDN CLK GND CS 6 5 + *GOWANDA GA10-103K OR COILTRONICS CTX100-4 22µF 220k VOUT –22V at 40mA 1329 TA01 U U DOUT DIN 8 7 MPU (e.g., 8051) P1.2 P1.1 P1.0 1 LTC1329-10/ LTC1329-50/LTC1329A-50 ABSOLUTE MAXIMUM RATINGS (Note 1) PACKAGE/ORDER INFORMATION TOP VIEW IOUT 1 VCC 2 SHDN 3 CLK 4 8 DOUT 7 DIN (UP/DN) 6 GND 5 CS Supply Voltage (VCC) ................................................ 7V Input Voltage (All Inputs)............ – 0.3V to (VCC + 0.3V) Output Voltage IOUT ......................................... – 15V to (VCC + 0.3V) DOUT ....................................... – 0.3V to (VCC + 0.3V) Short-Circuit Duration (All Outputs) ..........


LTC1329-10 LTC1329-50 LTC1329A-50


@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site.
(Privacy Policy & Contact)