AD5624R:  Quad,12-Bit nanoDAC® with 5ppm/°C On-Chip Reference

The AD5624R/AD5644R/AD5664R, members of the nanoDAC® family, are low power, quad, 12-/14-/16-bit buffered voltage-out DACs. All devices operate from a single 2.7 V to 5.5 V supply and are ...More

AD5624R:  Quad,12-Bit nanoDAC® with 5ppm/°C On-Chip Reference

Product Description

The AD5624R/AD5644R/AD5664R, members of the nanoDAC® family, are low power, quad, 12-/14-/16-bit buffered voltage-out DACs. All devices operate from a single 2.7 V to 5.5 V supply and are guaranteed monotonic by design.

The AD5624R/AD5644R/AD5664R have an on-chip reference. The AD56x4R-3 has a 1.25 V, 5 ppm/°C reference, giving a full-scale output range of 2.5 V; the AD56x4R-5 has a 2.5 V, 5 ppm/°C reference giving a full-scale output range of 5 V. The on-chip reference is off at power-up, allowing the use of an external refer-ence; all devices can be operated from a single 2.7 V to 5.5 V supply. The internal reference is enabled via a software write.

The part incorporates a power-on reset circuit that ensures the DAC output powers up to 0 V and remains there until a valid write takes place. The part contains a per-channel power-down feature that reduces the current consumption of the device to 480 nA at 5 V and provides software-selectable output loads while in power-down mode. The low power consumption of this part in normal operation makes it ideally suited to portable battery-operated equipment.

The AD5624R/AD5644R/AD5664R use a versatile 3-wire serial interface that operates at clock rates up to 50 MHz, and is compatible with standard SPI, QSPI™, MICROWIRE™, and DSP interface standards. The on-chip precision output amplifier enables rail-to-rail output swing.

Product Highlights

  1. Quad 12-/14-/16-bit DACs.
  2. On-chip 1.25 V/2.5 V, 5 ppm/°C reference.
  3. Available in 10-lead MSOP and 10-lead, 3 mm × 3 mm, LFCSP_WD.
  4. Low power, typically consumes 1.32 mW at 3 V and 2.25 mW at 5 V.

Applications

  • Process controls
  • Data acquisition systems
  • Portable battery-powered instruments
  • Digital gain and offset adjustment
  • Programmable voltage and current sources
  • Programmable attenuators

    • Data Sheet, Rev. B, 4/08

    Features

    • Low power, smallest pin-compatible, quad nanoDACs
      AD5664R: 16 bits
      AD5644R: 14 bits
      AD5624R: 12 bits
    • User selectable external or internal reference External reference default On-chip 1.25 V/2.5 V, 5 ppm/°C reference
    • 10-lead MSOP and 3 mm × 3 mm LFCSP_WD
    • 2.7 V to 5.5 V power supply
    • Guaranteed monotonic by design
    • Power-on reset to zero scale
    • Per channel power-down
    • Serial interface, up to 50 MHz

    Diagrams

    AD5624R Diagram
    Functional Block Diagram for AD5624R

    Specifications

    Resolution (Bits) 12bit
    DAC Update Rate 287kSPS
    DAC Settling Time 3µs
    # DAC Outputs 4
    DAC Type Voltage Out
    DAC Input Format Ser,SPI
    Output FSR (Uni 2.5V),(Uni 2Vref),(Uni 5V)
    Ref Int/Ext Int/Ext
    Supply Vnom Single(+2.7 to +5.5)
    Pwr Diss (Max) 6.6mW
    Package CSP,SOP

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    Part# Res (bits) Update Rate Settling Time # Outputs
    AD5625 12 333KSPS 3µs 4
    AD5624 12 287KSPS 3µs 4
    AD5624R 12 287KSPS 3µs 4
    AD7564 12 1.8MSPS 550ns 4
    AD5625R 12 333KSPS 3µs 4
    AD9765 12 125MSPS 35ns 2
    AD7805 10 667KSPS 1.5µs 4