LTC2641 Datasheet | Linear Technology

LTC2641/LTC2642 16-/14-/12-Bit VOUT DACs in 3mm × 3mm DFN Features DESCRIPTION n Tiny 3mm × 3mm 8-Pin DFN Package n Maximum 16-Bit INL Error: ±1LSB over Temperature n Low 120µA Supply Current n Guaranteed Monotonic over Temperature n Low 0.5n V- sec Glitch Impulse n 2.7V to 5.5V Single Supply Operation n Fast 1µs Settling Time to 16 Bits n Unbuffered Voltage Output Directly Drives 60k Loads n 50MHz SPI/QSPI/MICROWIRE patible Serial Interface n Power-On Reset Clears DAC Output to Zero Scale (LTC2641) or Midscale (LTC2642) n Schmitt-Trigger Inputs for Direct Optocoupler Interface n Asynchronous CLR Pin n 8-Lead MSOP and 3mm × 3mm DFN Packages (LTC2641) n 10-Lead MSOP and 3mm × 3mm DFN Packages (LTC2642) APPLICATIONS n High Resolution Offset and Gain Adjustment n Process Control and Industrial Automation n Automatic Test Equipment n Data Acquisition Systems The LTC®2641/LTC2642 are families of 16-, 14- and 12‑bit unbuffered voltage output DACs. These DACs operate from a single 2.7V to 5.5V supply and are guaranteed monotonic over temperature. The LTC2641A-16/LTC2642A‑16 provide 16‑bit performance (±1LSB INL and ±1LSB DNL) over temperature. Unbuffered DAC outputs result in low supply current of 120µA and a low offset error of ±1LSB. Both the LTC2641 and LTC2642 feature a reference input range of 2V to VDD. VOUT swings from 0V to VREF . For bipolar operation, the LTC2642 includes matched scaling resistors for use with an external precision op amp (such as the LT1678), generating a ±VREF output swing at RFB. The LTC2641/LTC2642 use a simple SPI/MICROWIRE patible 3-wire serial interface which can be operated at clock rates up to 50MHz and can interface directly with optocouplers for applications requiring isolation. A power-on reset circuit clears the LTC2641’s DAC output to zero scale and the LTC2642’s DAC output to midscale when power is initially applied. A logic low on the CLR pin asynchronously clears the DAC to zero scale (LTC2641) or...