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AD5750:  Industrial Current/Voltage Output Driver with Programmable Ranges

The AD5750/AD5750-1 are single-channel, low cost, precision voltage/current output drivers with hardware- or software- programmable output ranges. The software ranges are configured via an SPI-/MICROWIRE™-compatible serial interface. The AD5750/AD5750-1 target applications in PLC and industrial process control. The analog input to the AD5750/AD5750-1 is provided from a low voltage, single-supply ...More

AD5750:  Industrial Current/Voltage Output Driver with Programmable Ranges

Product Description

The AD5750/AD5750-1 are single-channel, low cost, precision voltage/current output drivers with hardware- or software- programmable output ranges. The software ranges are configured via an SPI-/MICROWIRE™-compatible serial interface. The AD5750/AD5750-1 target applications in PLC and industrial process control. The analog input to the AD5750/AD5750-1 is provided from a low voltage, single-supply digital-to-analog converter (DAC) and is internally conditioned to provide the desired output current/voltage range. Analog input ranges available are 0 V to 2.5 V (AD5750-1) or 0 V to 4.096 V (AD5750).

The output current range is programmable across five current ranges: 4 mA to 20 mA, 0 mA to 20 mA or 0 mA to 24 mA, ±20 mA, and ±24 mA. An overrange of 2% is available on the unipolar current ranges.

Voltage output is provided from a separate pin that can be configured to provide 0 V to 5 V, 0 V to 10 V, ±5 V, or ±10 V output ranges. An overrange of 20% is available on the voltage ranges.

Analog outputs are short-circuit and open-circuit protected and can drive capacitive loads of 1 μF and inductive loads of 0.1 H.

The device is specified to operate with a power supply range from ±12 V to ±24 V. Output loop compliance is 0 V to AVDD − 2.75 V.

The flexible serial interface is SPI and MICROWIRE compatible and can be operated in 3-wire mode to minimize the digital isolation required in isolated applications. The interface also features an optional PEC error checking feature using CRC-8 error checking, useful in industrial environments where data communication corruption can occur.

The device also includes a power-on reset function, ensuring that the device powers up in a known state (0 V or tristate), and an asynchronous CLEAR pin that sets the outputs to zero scale/midscale voltage output or the low end of the selected current range.

An HW SELECT pin is used to configure the part for hardware or software mode on power-up.

Applications

  • Process Control
  • Actuator Control
  • PLCs

RESOURCES & TOOLS

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  • Current output ranges:
    4 mA to 20 mA, 0 mA to 20 mA or 0 mA to 24 mA, ±20 mA, and ±24 mA ±0.03% FSR total unadjusted error (TUE)
    ±5 ppm/°C typical output drift
  • Voltage output ranges:
    0 V to 5 V, 0 V to 10 V, ±5 V, and ±10 V, with 20% overrange ±0.02% FSR TUE
    ±3 ppm/°C typical output drift
  • Flexible serial digital interface
  • On-chip output fault detection
  • PEC error checking
  • Asynchronous CLEAR function
  • Flexible power-up condition to 0 V or tristate
  • Power supply range
    AVDD: +12 V (± 10%) to +24 V (± 10%)
    AVSS: −12 V (± 10%) to −24 V (± 10%)
  • Output loop compliance to AVDD − 2.75 V
  • Temperature range: −40°C to +105°C
  • 32-lead 5 mm × 5 mm LFCSP package

Functional Block Diagram for AD5750

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