8-Channel, True 14-Bit, SPI, Voltage-Output DAC With Precision Internal Reference

8-Channel, True 14-Bit, SPI, Voltage-Output DAC With Precision Internal Reference - DAC70508Z


The DACx0508 is a pin-compatible family of low power, eight-channel, buffered voltage-output, digital-to-analog converters (DACs) with 16-, 14- and 12-bit resolution. The DACx0508 includes a 2.5-V, 5-ppm/°C internal reference, eliminating the need for an external precision reference in most applications. A user selectable gain configuration provides full-scale output voltages of 1.25 V (gain = ½), 2.5 V (gain = 1) or 5 V (gain = 2). The device operates from a single 2.7-V to 5.5-V supply, is specified monotonic and provides high linearity of ±1 LSB INL.

Communication to the DACx0508 is performed through a 4-wire serial interface that operates at clock rates up to 50 MHz. The VIO pin enables serial interface operation from 1.7 V to 5.5 V. The DACx0508 flexible interface enables operation with a wide range of industry-standard microprocessors and microcontrollers.

The DACx0508 incorporates a power-on-reset circuit that powers up and maintains the DAC outptus at either zero scale or midscale until a valid code is written to the device. The device consumes low current of 0.6 mA/channel at 5.5 V, making it suitable for battery-operated equipment. A per-channel power-down feature reduces the device current consumption to 15 µA.

The DACx0508 is characterized for operation over the temperature range of –40°C to 125°C and is available in small packages.


  • Performance
    • INL: ±1 LSB Maximum at 16-Bit Resolution
    • TUE: ±0.14% of FSR Maximum
  • Integrated 2.5 V Precision Internal Reference
    • Initial Accuracy: ±5 mV Maximum
    • Low Drift: 5 ppm/°C Typical
  • High Drive Capability: 20 mA with 0.5 V from Supply Rails
  • Flexible Output Configuration
    • User Selectable Gain: 2, 1 or ½
    • Reset to Zero Scale or Midscale
  • Wide Operating Range
    • Power Supply: 2.7 V to 5.5 V
    • Temperature Range: –40˚C to 125˚C
  • 50 MHz SPI Compatible Serial Interface
    • 4-Wire Mode, 1.7 V to 5.5 V Operation
    • Daisy Chain Operation
    • CRC Error Check
  • Low Power: 0.6 mA/Channel at 5.5 V
  • Small Packages:
    • 3 mm × 3 mm, 16-Pin WQFN
    • 2.4 mm x 2.4 mm, 16-Pin DSBGA

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Parametrics Compare all products in Precision DACs (<=10MSPS)

Resolution (Bits)
DAC Channels
DAC Architecture
Output Type
Output Range Min. (mA/V)
Output Range Max. (mA/V)
Reference: Type
Operating Temperature Range (C)
Buffered Voltage   
-40 to 125   

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