System Ready 20-Bit, ±2 LSB INL, Voltage Output DAC

The AD5790 is a single 20-bit, voltage out DAC that operates from a bipolar supply up to 33V. Reference buffers are also provided on-chip The AD5790 accepts a positive reference input in the range of 5V to VDD – 2.5V and a negative reference input in the range of VSS + 2.5v to 0V. The AD5790 offers a relative accuracy of +/-2 LSB's max and operation is guaranteed monotonic with a -1 LSB to +3 LSB's DNL specification.

The part uses a versatile 3-wire serial interface that operates at clock rates up to 35 MHz and is compatible with standard SPI®, QSPI™, MICROWIRE™, and DSP interface standards. The part incorporates a power-on reset circuit that ensures the DAC output powers up to 0V and in a known output impedance state and remains in this state until a valid write to the device takes place. The part provides a disable feature that places the output in a defined load state.

PRODUCT HIGHLIGHTS

* 20-bit resolution

* Wide power supply range of up to ±16.5 V.

* −40°C to +125°C operating temperature range.

* Low 8 nV/√Hz noise.

* Low ±0.018 ppm/°C gain error temperature coefficient.

APPLICATIONS

* Medical instrumentation

* Test and measurement

* Industrial control

* Scientific and aerospace instrumentation

* Data acquisition systems

* Digital gain and offset adjustment

* Power supply control

* Single 20-bit voltage output DAC, ±2 LSB INL

* 8 nV/√Hz output noise spectral density

* 0.1 LSB long term linearity error stability

* ±0.018 ppm/°C gain error temperature coefficient

* 2.5 µs output voltage settling time

* 3.5 nV-sec midscale glitch impulse