DAC81408 - 8-channel 16-bit high-voltage output DAC with integrated internal reference

The DAC81408, DAC71408, and DAC61408 (DACx1408) are a pin-compatible family of 8-channel,buffered, high-voltage output digital-to-analog converters (DACs) with 16-, 14- and 12-bitresolution. The DACx1408 includes a low drift, 2.5-V internal reference, eliminating the need foran external precision reference in most applications. These devices are specified monotonic andprovide high linearity of ±1 LSB INL.

A user selectable output configuration enables full-scale bipolar output voltages: ±20 V,±10 V, ±5 V or ±2.5 V and full-scale unipolar output voltages: 40 V, 20 V, 10 V or 5 V. Thefull-scale output range for each DAC channel is independently programmable. The integrated DACoutput buffers can sink or source up to 25 mA thus limiting the need of additional operationalamplifiers. Each pair of channels can be configured to provide a differential output with offsetcalibration. The three dedicated A-B toggle pins enable dither signal generation with up to threepossible frequencies.

The DACx1408 incorporates a power-on-reset circuit that connects the DAC outputs toground at power-up. The outputs remain at this state until the device registers are properlyconfigured for operation.

Communication to the DACx1408 is performed through a 4-wire serial interface thatsupports operation from 1.7 V to 5.5 V.

• Performance
  • Specified Monotonic at 16-Bit Resolution
  • INL: ±1 LSB Maximum at 16-Bit Resolution
  • TUE: ±0.1% of FSR Maximum
• Integrated 2.5-V Precision Internal Reference
  • Initial Accuracy: ±2.5 mV Maximum
  • Low Drift: 5 ppm/˚C Typical
• Flexible Output Configuration
  • Output Range: ±2.5 V, ±5 V, ±10 V, ±20 V
    0 to 5 V, 0 to 10 V, 0 to 20 V, 0 to 40 V
  • Differential Output Mode
• High Drive Capability: ±25 mA with 1.5 V from Supply Rails
• Three Dedicated A-B Toggle Pins for Dither Signal Generation
• Analog Temperature Output
  • Sensor Gain of –4 mV/˚C
• 50-MHz SPI Compatible Serial Interface
  • 4-Wire Mode, 1.7-V to 5.5-V Operation
  • Daisy Chain Operation
  • CRC Error Check
• Temperature Range: –40˚C to +125˚C
• Small Package
  • 6 mm × 6 mm, 40-Pin VQFN

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