The AD5620/AD5640/AD5660, members of the nanoDACTM family of devices, are low power, single, 12-/14-/16-bit,
buffered voltage-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 voltage
range of 2.5 V. The AD5620/AD5640/AD5660-2-3 parts include an
internal, 2.5 V, 5 ppm/°C reference, giving a full-scale output
voltage range of 5 V. The reference associated with each part is
available at the VREFOUT pin.
The parts incorporate a power-on reset circuit to ensure that the
DAC output powers up to 0 V (AD5620/AD5640/AD5660-1-2) or midscale
(AD5620-3 and AD5660-3) and remains there until a valid write takes
place. The parts contain a power-down feature that reduces the
current consumption of the device to 480 nA at 5 V and provides
software-selectable output loads while in power-down mode. The
power consumption is
2.5 mW at 5 V, reducing to 1 μW in power-down mode.
The AD5620/AD5640/AD5660 on-chip precision output amplifier allows
rail-to-rail output swing to be achieved. For remote sensing
applications, the output amplifier’s inverting input is available
to the user. The AD5620/AD5640/AD5660 use a versatile 3-wire serial
interface that operates at clock rates up to 30 MHz and is
compatible with standard SPI®, QSPITM, MICROWIRETM, and DSP
interface standards.
