AD5337:  2.5 V to 5.5 V, 250 μA, 2-Wire Interface, Dual Voltage Output, 8-Bit DACs

The AD5337/AD5338/AD5339 are dual 8-, 10-, and 12-bit buffered voltage output DACs, respectively. Each part is housed in an 8-lead MSOP package and operates from a single 2.5 V to 5.5 V supply, ...More

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AD5337:  2.5 V to 5.5 V, 250 μA, 2-Wire Interface, Dual Voltage Output, 8-Bit DACs

Product Description

The AD5337/AD5338/AD5339 are dual 8-, 10-, and 12-bit buffered voltage output DACs, respectively. Each part is housed in an 8-lead MSOP package and operates from a single 2.5 V to 5.5 V supply, consuming 250 μA at 3 V. On-chip output amplifiers allow rail-to-rail output swing with a slew rate of 0.7 V/μs. A 2-wire serial interface operates at clock rates up to 400 kHz. This interface is SMBus compatible at VDD < 3.6 V. Multiple devices can be placed on the same bus.

The references for the two DACs are derived from one reference pin. The outputs of all DACs can be updated simultaneously using the software LDAC function. The parts incorporate a power-on reset circuit to ensure that the DAC outputs power up to 0 V and remain there until a valid write to the device takes place. A software clear function resets all input and DAC registers to 0 V. A power-down feature reduces the current consumption of the devices to 200 nA @ 5 V (80 nA @ 3 V).

The low power consumption of these parts in normal operation makes them ideally suited to portable battery-operated equipment. The power consumption is typically 1.5 mW at 5 V and 0.75 mW at 3 V, reducing to 1 μW in power-down mode.

Applications

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

    • Data Sheet, Rev. C, 9/07

    Features

    • AD5337
      2 buffered 8-bit DACs in 8-lead MSOP
    • AD5338, AD5338-1
      2 buffered 10-bit DACs in 8-lead MSOP
    • AD5339
      2 buffered 12-bit DACs in 8-lead MSOP
    • Low power operation: 250 μA @ 3 V, 300 μA @ 5 V
    • 2-wire (I2C-compatible) serial interface
    • 2.5 V to 5.5 V power supply
    • Guaranteed monotonic by design over all codes
    • Power-down to 80 nA @ 3 V, 200 nA @ 5 V
    • 3 power-down modes
    • Double-buffered input logic
    • Output range: 0 V to VREF
    • Power-on reset to 0 V

    Diagrams

    AD5337 Diagram
    Functional Block Diagram for AD5337

    Характеристики

    Resolution (Bits) 8bit
    DAC Update Rate 14.8kSPS
    DAC Settling Time 6µs
    # DAC Outputs 2
    DAC Type Voltage Out
    DAC Input Format I2C/Ser 2-wire
    Output FSR (Uni Vref)
    Ref Int/Ext Ext
    Supply Vnom Single(+2.7),Single(+3),Single(+3.3),Single(+5)
    Pwr Diss (Max) 1.9mW
    Package SOP

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    Part# Res (bits) Update Rate Settling Time # Outputs
    AD7628 8 2.9MSPS 350ns 2
    AD5302 8 167KSPS 6µs 2
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    AD7302 8 833KSPS 1.2µs 2
    AD7528 8 5.6MSPS 180ns 2
    AD5332 8 167KSPS 6µs 2
    AD7303 8 833KSPS 1.2µs 2