The AD57801 is a true 18-bit, unbuffered voltage output DAC that operates from a bipolar supply of up to 33 V. The AD5780 accepts a positive reference input range of 5 V to VDD ? 2.5 V and a negative reference input range of VSS + 2.5 V to 0 V. Both reference inputs are buffered on chip and external buffers are not required. The AD5780 offers a relative accuracy specifica-tion of ±1 LSB maximum range, and operation is guaranteed monotonic with a ±1 LSB DNL maximum range specification.
The part uses a versatile 3-wire serial interface that operates at clock rates of 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 that the DAC output powers up to 0 V 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.
- True 18-bit voltage output DAC, ±1 LSB INL
- 8 nV/Hz output noise spectral density
- 0.025 LSB long-term linearity error stability
- ±0.018 ppm/°C gain error temperature coefficient
- 2.5 microseconds output voltage settling time
- 3.5 nV-sec midscale glitch impulse
- Integrated Precision Reference Buffers
- Operating temperature range: -40°C to +125°C
- 4 mm x 5 mm LFCSP package
- Wide power supply range of up to ±16.5 V
- 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
