AD5821:  120 mA, Current Sinking, 10-Bit, I2C® DAC

The AD5821 is a single 10-bit digital-to-analog converter with 120 mA output current sink capability. It features an internal reference and operates from a single 2.7 V to 5.5 V supply. The DAC is ...More

AD5821:  120 mA, Current Sinking, 10-Bit, I2C® DAC

Product Description

The AD5821 is a single 10-bit digital-to-analog converter with 120 mA output current sink capability. It features an internal reference and operates from a single 2.7 V to 5.5 V supply. The DAC is controlled via a 2-wire (I2C-compatible) serial interface that operates at clock rates up to 400 kHz.

The AD5821 incorporates a power-on reset circuit that ensures that the DAC output powers up to 0 V and remains there until a valid write takes place. It has a power-down feature that reduces the current consumption of the device to 1 µA maximum.

The AD5821 is designed for autofocus, image stabilization, and optical zoom applications in camera phones, digital still cameras, and camcorders.

The AD5821 also has many industrial applications, such as controlling temperature, light, and movement, over the range of −40°C to +85°C without derating.

The I2C address for the AD5821 is 0x18.

Consumer Applications

  • Lens autofocus
  • Image stabilization
  • Optical zoom
  • Shutters
  • Iris/exposure
  • Neutral density (ND) filters
  • Lens covers
  • Camera phones
  • Digital still cameras
  • Camera modules
  • Digital video cameras/camcorders
  • Camera-enabled devices
  • Security cameras
  • Web/PC cameras


    • Industrial Applications
  • Heater controls
  • Fan controls
  • Cooler (Peltier) controls
  • Solenoid controls
  • Valve controls
  • Linear actuator controls
  • Light controls
  • Current loop controls

    • Features

    • 120 mA current sink
    • Available in 3 × 3 array WLCSP package
    • 2-wire (I2C-compatible) 1.8 V serial interface
    • 10-bit resolution
    • Integrated current sense resistor
    • 2.7 V to 5.5 V power supply
    • Guaranteed monotonic over all codes
    • Power-down to 0.5 µA typical
    • Internal reference
    • Ultralow noise preamplifier
    • Power-down function
    • Power-on reset

    Diagrams

    AD5821 Diagram
    Functional Block Diagram for AD5821

    Specifications

    Resolution (Bits) 10bit
    DAC Update Rate n/a
    DAC Settling Time 250µs
    # DAC Outputs 1
    DAC Type Current Out
    DAC Input Format I2C/Ser 2-wire,Ser
    Output FSR (3-120mA)
    Ref Int/Ext Int
    Supply Vnom Single(+2.7 to +5.5),Single(+2.7),Single(+3),Single(+3.3),Single(+5)
    Pwr Diss (Max) 20mW
    Package CSP

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