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Data Sheet
Industrial Current/Voltage Output Driver with Programmable Ranges AD5750/AD5750-1/AD5750-2
FEATURES
Current output ranges: 4 mA to 20 mA, 0 mA to 20 mA, 0 mA to 24 mA, ±20 mA, and ±24 mA ±0.03% full-scale range (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 Packet error checking (PEC) 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
APPLICATIONS
Process controls Actuator controls PLCs
GENERAL DESCRIPTION
The AD5750/AD5750-1/AD5750-2 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/AD5750-2 target applications in PLC and industrial process control. The analog input to the AD5750/ AD5750-1/AD5750-2 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/AD5750-2) 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, 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 devices are 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 operate in 3-wire mode to minimize the digital isolation required in isolated applications. The interface also features an optional PEC feature using CRC-8 error checking, useful in industrial environments where data communication corruption can occur.
The devices also include a power-on-reset function, ensuring that the devices power up in a known state (0 V or tristate), and an asynchronous CLEAR pin that sets the outputs to a zero scale/midscale voltage output or the low end of the selected current range.
The HW SELECT pin is used to configure the parts for hardware or software mode on power-up.
Table 1. Related Devices
Part Number Description
AD5422
Single channel, 16-bit, serial input current source and voltage output DAC
AD5751
Industrial I/V output driver, single supply, 55 V maximum supply, programmable ranges
AD5420
Single channel, 16-bit, serial input, 4 mA to 20 mA current source DAC
Rev. F
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AD5750/AD5750-1/AD5750-2
TABLE OF CONTENTS
Features .............................................................................................. 1 Applications....................................................................................... 1 General Description ......................................................................... 1 Revision History ............................................................................... 2 Functional Block Diagram .............................................................. 3 Specifications..................................................................................... 4
Timing Characteristics ................................................................ 8 Absolute Maximum Ratings.......................................................... 10
ESD Caution................................................................................ 10 Pin Configuration and Function Descriptions........................... 11 Typical Performance Characteristics ........................................... 13
Voltage Output............................................................................ 13 Current Output ......