LTC2642

V_DD to GND .................................................0.3V to 6V
CS, SCLK, DIN,
CLR to GND ........................0.3V to (V_DD + 0.3V) or 6V
REF, VOUT, INV to GND ......0.3V to (V_DD + 0.3V) or 6V
RFB to INV .................................................... 6V to 6V
RFB to GND ....................................................6V to 6V
Operating Temperature Range
LTC2641C/LTC2642C ................................... 0 to 70
LTC2641I/LTC2642I ................................ 40 to 85
Maximum Junction Temperature ........................... 125
Storage Temperature Range ..................65 to 150
Lead Temperature (Soldering, 10 sec) .................. 300

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 LTC2641-16/LTC2642-16 provide 16-bit performance (±2LSB INL and ±1LSB DNL) over temperature. Unbuffered DAC outputs result in low supply current of 120A and a low offset error of ±1LSB.

Both the devices 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 ±VREF output swing at RFB.

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 specifi ed over the commercial and industrial ranges.