FEATURES
► 16-bit resolution, ±3 LSB16 INL, ±1 LSB16 DNL
► TUE: ±0.22% of FSR maximum
► Offset error: ±1.5mV maximum
► Gain error: ±0.26% of FSR maximum
► Guaranteed sourcing current of 100 mA
► Ultra-low headroom: 12mV at 20mA load
► 2.5V internal voltage reference, 5ppm/°C, typical
► 55nV/√Hz noise spectral density (external reference)
► 96nV/√Hz noise spectral density (internal reference)
► Output voltage, current, and die temperature monitors
► 50MHz SPI write and read
► 2.7V to 5.5V power supply range
► 1.2V or 1.8V compatible digital interface
► Operating temperature range: −40°C to +125°C
► Small package: 2.1 mm × 2.2 mm, 25-ball WLCSP

APPLICATIONS
► Optical transceivers
► Test and measurement
► Industrial automation
► Data acquisition systems

GENERAL DESCRIPTION
The AD3531/AD3531R are low power, 4-channel, 16-bit, buffered
voltage output, digital-to-analog converters (DACs) that include
software-programmable gain controls that result in full-scale output
spans of 2.5V or 5V for reference voltages of 2.5V. The devices operate
from single, 2.7V to 5.5V supply ranges and are guaranteed
monotonic by design. The AD3531R also offers a 2.5V, 5ppm/°C
internal reference that is disabled by default.
The devices include integrated multiplexers that allow monitoring
of output voltages, currents, and internal die temperature. The
AD3531/AD3531R are available in 2.1 mm × 2.2 mm, 25-ball
WLCSP packages. The devices incorporate power-on reset (POR)
circuits that ensure that the DACs output power up to and present
at 16kΩ to ground until a valid write is executed. The DACs also
contain power-down modes that reduce the current consumption
down to 620μA, typical.
The serial peripheral interface (SPI) and MICROWIRE®-compatible,
4-wire serial interface operates on logic levels as low as 1.08V up
to 1.98V and clock rates up to 50MHz.