20 bit DAC with Integrated Reference


20 bit DAC with Integrated Reference

20 bit DAC with Integrated Reference

The AD5790 is a single 20-bit, unbuffered voltage-output DAC that operates from a bipolar supply of up to 34V. The AD5790 accepts a positive reference input in the range 4V to VDD – 2.5V and a negative reference input in the range VSS + 2.5 V to 0V. The AD5790 offers a relative accuracy specification of ±1 LSB max, and operation is guaranteed monotonic with a ±1 LSB DNL max specification.

The part uses a versatile 3-wire serial interface that operates at clock rates up to 50 MHz and that is compatible with standard SPI®, QSPI™, MICROWIRE™, and DSP interface standards. Reference buffers are also provided on-chip. 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.

APPLICATIONS
  • Process control
  • Data acquisition systems
  • Digital gain and offset adjustment
  • Programmable voltage and current sources
  • Programmable attenuators
  • Source measure units
  • Precision sources
  • Gradient Control
PRODUCT HIGHLIGHTS
  • Available in 24-Lead LFCSP.
  • 2 LSB INL.
  • Low glitch on power-up.
  • High speed serial interface with clock speeds up to 50 MHz.
  • Low 8 nV/√Hz Noise.
  • Low 0.018 ppm/°C gain error temperature coefficient.

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