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AD5303:  2.5 V to 5.5 V, 230 µA, Dual Rail-to-Rail Voltage Output 8-Bit DACs

The AD5303/AD5313/AD5323* are dual 8-/10-/12-bit buffered voltage output DACs in a 16-lead TSSOP package that operate from a single 2.5 V to 5.5 V supply, consuming 230 μA at 3 V. Their on-chip output amplifiers allow the outputs to swing rail-to-rail with a slew rate of 0.7 V/μs. The AD5303/AD5313/AD5323 utilize a versatile 3-wire serial interface that operates at clock rates up to 30 MHz and is ...More

AD5303:  2.5 V to 5.5 V, 230 µA, Dual Rail-to-Rail Voltage Output 8-Bit DACs

Product Description

The AD5303/AD5313/AD5323* are dual 8-/10-/12-bit buffered voltage output DACs in a 16-lead TSSOP package that operate from a single 2.5 V to 5.5 V supply, consuming 230 μA at 3 V. Their on-chip output amplifiers allow the outputs to swing rail-to-rail with a slew rate of 0.7 V/μs. The AD5303/AD5313/AD5323 utilize a versatile 3-wire serial interface that operates at clock rates up to 30 MHz and is compatible with standard SPI, QSPI™, MICROWIRE™, and DSP interface standards.

The references for the two DACs are derived from two reference pins (one per DAC). These reference inputs may be configured as buffered or unbuffered inputs. The parts incorporate a power-on reset circuit, which ensures that the DAC outputs power up to 0 V and remain there until a valid write to the device takes place. There is also an asynchronous active low CLR pin that clears both DACs to 0 V. The outputs of both DACs may be updated simultaneously using the asynchronous LDAC input. The parts contain a power-down feature that reduces the current consumption of the devices to 200 nA at 5 V (50 nA at 3 V) and provides software-selectable output loads while in power-down mode. The parts may also be used in daisy-chaining applications using the SDO pin.

The low power consumption of these parts in normal operation makes them ideally suited to portable battery-operated equipment. The power consumption is 1.5 mW at 5 V and 0.7 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

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

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    • AD5303: 2 buffered 8-bit DACs in 1 package
      A version: ±1 LSB INL, B version: ±0.5
      LSB INL
    • AD5313: 2 buffered 10-bit DACs in 1 package
      A version: ±4 LSB INL, B version: ±2
      LSB INL
    • AD5323: 2 buffered 12-bit DACs in 1 package
      A version: ±16 LSB INL, B version: ±8
      LSB INL
    • 16-lead TSSOP package
    • Power-down to 200 nA @ 5 V, 50 nA @ 3 V
    • Micropower operation: 300 μA @ 5 V (including reference current)
    • 2.5 V to 5.5 V power supply
    • Double-buffered input logic
    • Guaranteed monotonic by design over all codes
    • Buffered/unbuffered reference input options
    • Output range: 0 V to VREF or 0 V to 2 VREF
    • Power-on-reset to 0 V
    • Resolution (Bits): 8bit
    • DAC Update Rate: 167kSPS
    • DAC Settling Time: 6µs
    • # DAC Outputs: 2
    • DAC Type: Voltage Out
    • DAC Input Format: Ser,SPI
    • Output FSR: (Uni 2Vref),(Uni Vref)
    • Ref Int/Ext: Ext
    • Supply Vnom: Single(+2.5),Single(+2.7),Single(+3),Single(+3.3),Single(+5)
    • Pwr Diss: 2.5mW
    • Package: SOP

    Functional Block Diagram for AD5303

    Of Note ...

    For additional information, please see also AD5302 in 10-lead MicroSOIC package.

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    AD5428 8 21.3MSPS 30ns 2
    AD5429 8 2.47MSPS 30ns 2
    AD5302 8 167KSPS 6µs 2
    AD5303 8 167KSPS 6µs 2
    AD9709 8 125MSPS 35ns 2
    AD5332 8 167KSPS 6µs 2
    AD7628 8 2.9MSPS 350ns 2
    AD7302 8 833KSPS 1.2µs 2
    AD7528 8 5.6MSPS 180ns 2
    AD5424 8 20.4MSPS 30ns 1
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