The LTC2641/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 V DD. V OUT swings from 0V to V REF. For bipolar operation, the LTC2642 includes matched scaling resistors for use with an external precision op amp (such as the LT1678), generating a ±V REF output swing at R FB. The LTC2641/LTC2642 use a simple SPI/MICROWIRE compatible 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 midscale (LTC2642). These DACs are all specified over the commercial and industrial ranges.
- Tiny 3mm × 3mm 8-Pin DFN package
- Maximum 16-Bit INL error: ±1LSB over temperature
- Low 120µA supply current
- Guaranteed monotonic over temperature
- Low 0.5nV•sec glitch impulse
- 2.7V to 5.5V single supply operation
- Fast 1µs settling time to 16 bits
- Unbuffered voltage output directly drives 60k loads
- 50MHz SPI™/QSPI™/MICROWIRE™ compatible
- Serial interface
- Power-on reset clears DAC output to zero scale (LTC2641) or midscale (LTC2642)
- Schmitt-trigger inputs for direct optocoupler interface
- Asynchronous CLR pin
- 8-Lead MSOP, 3mm × 3mm DFN, and 8-Lead SO packages (LTC2641)
- 10-Lead MSOP and 3mm × 3mm DFN packages
- (LTC2642)
- Operating temp.: -40 to +85°C
- For full details please refer to data sheet
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