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LTC1446CN8#PBF
LTC1446/LTC1446L Dual 12-Bit Rail-to-Rail Micropower DACs in SO-8 U DESCRIPTIO FEATURES s s s s s s s s s s s s Dual DACs with 12-Bit Resolution SO-8 Package Rail-to-Rail Output Amplifiers Internal Reference Maximum DNL Error: 0.5LSB 3V Operation (LTC1446L): ICC = 650µA Typ 5V Operation (LTC1446): ICC = 1000µA Typ Settling Time: 14µs to ±0.5LSB Power-On Reset Clears DACs to 0V 3-Wire Cascadable Serial Interface with 500kHz Update Rate Schmitt Trigger On Input Allows Direct Optocoupler Interface Low Cost The LTC ®1446/LTC1446L are dual 12-bit digital-to-analog converters (DACs) available in an SO-8 package. They are complete with a rail-to-rail voltage output amplifier, an internal reference and an easy-to-use 3-wire cascadable serial interface. The LTC1446 has an internal reference and a full-scale output of 4.095V. It operates from a single 4.5V to 5.5V supply. The LTC1446L has an internal reference and a full-scale output of 2.5V. It operates from a single 2.7V to 5.5V supply. The low power supply current makes the LTC1446 family ideal for battery-powered applications. These DACs are available in space saving 8-pin SO and PDIP packages and require no external components for operation. U APPLICATIO S s s s Digital Calibration Industrial Process Control Automatic Test Equipment Cellular Telephones , LTC and LT are registered trademarks of Linear Technology Corporation. U s TYPICAL APPLICATION Functional Block Diagram: Dual 12-Bit Rail-to-Rail DAC 7 LTC1446: 5V LTC1446L: 3V TO 5V VCC Differential Nonlinearity vs Input Code 2 DIN + 24-BIT SHIFT REG AND DAC LATCH RAIL-TO-RAIL VOLTAGE OUTPUT + 12-BIT DAC A VOUT A 5 DNL ERROR (LSB) – 1 CLK 3 CS/LD 0.4 0.3 12-BIT DAC B µP 0.5 VOUT B 8 0.2 0.1 0 –0.1 –0.2 –0.3 –0.4 – –0.5 4 DOUT 0 POWER-ON RESET 512 1024 1536 2048 2560 3072 3584 4095 CODE 1446/46L G13 GND 6 1446/1446L TA01 1
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