AD5781ARUZ Data Converter IC DAC 18-Bit VOut +/-0.5 LSB INL
da converter chip
,da converter circuit
AD5781ARUZ Data Converter IC DAC 18-Bit VOut +/-0.5 LSB INL
FEATURES
- Single 18-bit DAC, ±0.5 LSB INL
- 7.5 nV/√Hz noise spectral density
- 0.05 LSB long-term linearity stability
- <0.05 ppm/°C temperature drift
- 1 μs settling time
- 1.4 nV-sec glitch impulse
- Operating temperature range: −40°C to +125°C 20-lead TSSOP 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
GENERAL DESCRIPTION
The AD57811 is a single 18-bit, unbuffered voltage output digital- to-analog converter (DAC) that operates from a bipolar supply of up to 33 V. The AD5781 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. The AD5781 offers a relative accuracy specifi- cation of ±0.5 LSB maximum, and operation is guaranteed monotonic with a ±0.5 LSB differential nonlinearity (DNL) maximum 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 serial peripheral interface (SPI), QSPITM, MICROWIRETM, and DSP interface standards. The part incorporates a power-on reset circuit that ensures that 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.
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