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Texas Instruments DAC7678 Digital to Analog Converters

The Texas Instruments DAC7678 digital-to-analog converter (DAC) is a low-power, voltage-output, octal channel, 12-bit data converter. The TI DAC7678 includes a 2.5V internal reference (disabled by default), giving a full-scale output voltage range of 5V. The internal reference has an initial accuracy of ±5mV and can source up to 20mA at the VREFIN/VREFOUT pin. The TI DAC7678 DAC is monotonic, provides very good linearity, and minimizes undesired code-to-code transient voltages (glitch). The TI DAC7678 uses a versatile, 2-wire serial interface that is I²C-compatible and operates at clock rates of up to 3.4MHz. Multiple devices can share the same bus. The TI DAC7678 incorporates a power-on-reset circuit that ensures the DAC output powers up to either zero-scale or mid-scale until a valid code is written to the device.

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DAC7678 Features
  • Relative Accuracy: 1 LSB INL
  • Glitch Energy: 0.15nV-s
  • Internal Reference:
    • 2.5V Reference Voltage (disabled by default)
    • 5ppm/°C Temperature Drift (typ)
    • 20mA Sink/Source Capability
  • Temperature Range: -40°C to +125°C
  • Ultra-Low Power Operation: 0.13mA/Channel at 5V (without internal reference current)
  • Wide Power-Supply Range: +2.7V to +5.5V
DAC7678 Applications
  • Portable Instrumentation
  • Closed-Loop Servo-Control
  • Process Control
  • Data Acquisition Systems
  • Programmable Attenuation
  • PC Peripherals
DAC7678 Functional Diagram

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Texas Instruments DAC7678EVM Evaluation Board

The Texas Instruments DAC7678EVM is an evaluation board for the TI DAC7678 low-power, voltage-output, octal, 12-bit digital-to-analog converter (DAC). The TI DAC7678EVM allows evaluation of all aspects of the device and allows user control over every pin on the DAC7678. The converter is controlled by an I²C interface that can operate at clock rates of up to 3.4MHz. This TI evaluation module features onboard optional external reference selection, a wide selection of digital and I/O voltages, and hardware or software control of control logic.

DAC7678EVM Features
  • Contains all support circuitry needed for the DAC7678
  • Onboard optional external reference selection
  • Wide selection of digital and I/O voltages
  • Hardware or software control of control logic
  • Compatible with the TI Modular EVM System

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