The AD5781 is a single 18-bit, unbuffered voltage-output DAC that operates from a bipolar supply of up to 33 V. The AD5781 accepts a positive reference input in the range 5V to VDD – 2.5 V and a negative reference input in the range VSS + 2.5 V to 0 V. The AD5781 offers a relative accuracy specification of ±0.5 LSB max, and operation is guaranteed monotonic with a ±0.5 LSB DNL max specification.
The part uses a versatile 3-wire serial interface that operates at clock rates up to 35 MHz and that 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 0 V and in a known output impedance state and remains in this state until a valid write to the device takes place. The part provides an output clamp feature that places the output in a defined load state.
- Single 18-bit DAC, ± 0.5 LSB INL
- 0.05 LSB Long Term Linearity Stability
- < 0.05-ppm/°C Temperature Drift
- 1µs Settling Time
- 1.4 nV-sec glitch impulse
- Operating temperature range: -40°C to 125°C
- 20-Lead TSSOP Package
- Wide Power Supply range up to ±16.5V
- 35 MHz Schmitt triggered Digital Interface
- 1.8 V compatible digital interface
- Applications
- Medical Instrumentation
- Test and Measurement
- Industrial Control
- Scientific and Aerospace Instrumentation
- Data Acquisition Systems
- Digital Gain and Offset Adjustment
- Power Supply Control
