Members of Linear Technology’s LTC2751 family are extremely low-power, software-programmable, current-output 16-, 14-, and 12-bit DACs. Software programmability eliminates the need for expensive precision resistors, gain stages and manual jumper switching. Six unique output voltage ranges can be programmed via SoftSpan software, including two unipolar ranges (0 V to 5 V, and 0 V to 10 V), and four bipolar ranges (±10 V, ±5 V, ±2.5 V, and -2.5 V to +7.5 V). Additionally, these DACs typically draw only 0.7 μA of supply current while generating an output swing up to ±10 V.

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The LTC2751-16 offers accurate dc specifications, including ±1 LSB(max) INL and DNL over the industrial temperature range. This device also offers excellent ac specifications, including full-scale settling time of only 2 μs and low 2 nVs glitch impulse, which is key for ac applications such as waveform generation.

The LTC2751 DACs use a bidirectional input/output parallel interface that allows readback of any internal register, as well as the DAC output span setting. A power-on reset circuit returns the DAC output to 0 V when power is first applied, and a CLR pin asynchronously clears the DAC to 0 V in any output range. The DACs are available now in pin-compatible 16-bit, 14-bit, and 12-bit QFN-38 (5 mm x 7 mm) packages. Pricing begins at $4.95 for the LTC2751-12 in 1000-piece quantities.