The AD5620/AD5640/AD5660, members of the nanoDACfamily of devices, are low power, single, 12-/14-/16-bit, bufferedvoltage-out DACs and are guaranteed monotonic by design.The AD5620/AD5640/AD5660-1 parts include an internal,1.25 V, 5 ppm/°C reference, giving a full-scale output voltagerange of 2.5 V. The AD5620/AD5640/AD5660-2-3 parts includean internal, 2.5 V, 5 ppm/°C reference, giving a full-scale outputvoltage range of 5 V. The reference associated with each part isavailable at the VREFOUT pin.The parts incorporate a power-on reset circuit to ensure that theDAC output powers up to 0 V (AD5620/AD5640/AD5660-1-2)or midscale (AD5620-3 and AD5660-3) and remains there untila valid write takes place. The parts contain a power-downfeature that reduces the current consumption of the device to480 nA at 5 V and provides software-selectable output loadswhile in power-down mode. The power consumption is2.5 mW at 5 V, reducing to 1 μW in power-down mode.The AD5620/AD5640/AD5660 on-chip precision outputamplifier allows rail-to-rail output swing to be achieved. Forremote sensing applications, the output amplifier’s invertinginput is available to the user. The AD5620/AD5640/AD5660 usea versatile 3-wire serial interface that operates at clock rates upto 30 MHz and is compatible with standard SPI®, QSPI™,MICROWIRE™, and DSP interface standards.
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