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AD5321:  2.5 V to 5.5 V, 120 µA, 2-Wire Interface, Voltage-Output 12-Bit DAC

The AD5301/AD5311/AD5321* are single 8-/10-/12-bit, buffered, voltage-output DACs that operate from a single 2.5 V to 5.5 V supply, consuming 120 μA at 3 V. The on-chip output amplifier allows rail-to-rail output swing with a slew rate of 0.7 V/μs. It uses a 2-wire (I2C-compatible) serial interface that operates at clock rates up to 400 kHz. Multiple devices can share the same bus. ...More

AD5321:  2.5 V to 5.5 V, 120 µA, 2-Wire Interface, Voltage-Output 12-Bit DAC

Product Description

The AD5301/AD5311/AD5321* are single 8-/10-/12-bit, buffered, voltage-output DACs that operate from a single 2.5 V to 5.5 V supply, consuming 120 μA at 3 V. The on-chip output amplifier allows rail-to-rail output swing with a slew rate of 0.7 V/μs. It uses a 2-wire (I2C-compatible) serial interface that operates at clock rates up to 400 kHz. Multiple devices can share the same bus.

The reference for the DAC is derived from the power supply inputs and thus gives the widest dynamic output range. These parts incorporate a power-on reset circuit, which ensures that the DAC output powers up to 0 V and remains there until a valid write takes place. The parts contain a power-down feature that reduces the current consumption of the device to 50 nA at 3 V and provides software-selectable output loads while in power-down mode.

The low power consumption in normal operation makes these DACs ideally suited to portable battery-operated equipment. The power consumption is 0.75 mW at 5 V and 0.36 mW at 3 V, reducing to 1 μW in all power-down modes.

Applications

  • Portable battery-powered instruments
  • Digital gain and offset adjustment
  • Programmable voltage and current sources
  • Programmable attenuators

    • *Protected by U.S. Patent No. 5684481, other patents pending.

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      AD5301: buffered voltage output 8-bit DAC
      AD5311: buffered voltage output 10-bit DAC
      AD5321: buffered voltage output

    • 12-bit DAC 6-lead SOT-23 and 8-lead MSOP packages
    • Micropower operation: 120 μA @ 3 V
    • 2-wire (I2C®-compatible) serial interface
    • Data readback capability
    • 2.5 V to 5.5 V power supply
    • Guaranteed monotonic by design over all codes
    • Power-down to 50 nA @ 3 V
    • Reference derived from power supply
    • Power-on reset to 0 V
    • On-chip rail-to-rail output buffer amplifier
    • 3 power-down functions
    • Resolution (Bits): 12bit
    • DAC Update Rate: 125kSPS
    • DAC Settling Time: 8µs
    • # DAC Outputs: 1
    • DAC Type: Voltage Out
    • DAC Input Format: I2C/Ser 2-wire,Ser
    • Output FSR: (Uni Vdd)
    • Ref Int/Ext: Int
    • Supply Vnom: Single(+2.5),Single(+2.7),Single(+3),Single(+3.3),Single(+5)
    • Pwr Diss: 1.4mW
    • Package: SOP,SOT

    Functional Block Diagram for AD5321

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    *The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
    **Sample availability may be better than production availability. Please enter samples into your cart to check sample availability.