Datasheet AD5748 (Analog Devices)

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Industrial Current/Voltage Output Driver with Programmable Ranges Data Sheet AD5748 FEATURES
The output current range is programmable across two current ranges: 4 mA to 21 mA and 0 mA to 21 mA.
Current output ranges: 4 mA to 21 mA, 0 mA to 21 mA ±0.15% FSR total unadjusted error (TUE)
Voltage output is provided from a separate pin that can be
±5 ppm/°C FSR typical output drift
configured to provide 0 V to 5 V, 0 V to 10.5 V, or ±10.5 V
Voltage output ranges: 0 V to 5 V, 0 V to 10.5 V, ±10.5 V
output range.
±0.05% FSR total unadjusted error (TUE)
Analog outputs are short-circuit and open-circuit protected and
±3 ppm/°C FSR output drift
can drive capacitive loads of 2 μF and inductive loads of 0.1 H.
Flexible serial digital interface On-chip output fault detection
The device is specified to operate with a power supply range from
PEC error checking
±12 V to ±24 V. Output loop compliance is 0 V to AVDD − 2.75 V.
Asynchronous CLEAR function
The flexible serial interface is SPI- and MICROWIRE-compatible
Flexible power-up condition to 0 V or tristate
and can be operated in 3-wire mode to minimize the digital
Power supply range
isolation required in isolated applications. The interface also
AVDD: +12 V (± 10%) to +24 V (± 10%)
features an optional PEC error checking feature using CRC-8
AVSS: −12 V (± 10%) to −24 V (± 10%)
error checking, useful in industrial environments where data
Output loop compliance to AVDD − 2.75 V
communication corruption can occur.
Temperature range: −40°C to +105°C
The device also includes a power-on-reset function, ensuring
32-lead, 5 mm × 5 mm LFCSP package
that the device powers up in a known state (0 V or tristate),
APPLICATIONS
and an asynchronous CLEAR pin that sets the outputs to zero
Process control
scale/midscale voltage output or the low end of the selected
Actuator control
current range.
PLCs
An HW SELECT pin is used to configure the part for hardware or software mode on power-up.
GENERAL DESCRIPTION
Note that the plots in the Typical Performance Characteristics The AD5748 is a single-channel, low cost, precision, voltage/ section of this data sheet contain information on the standard current output driver with hardware or software programmable ranges, as released in the AD5750/AD5750-1 data sheet. Although output ranges. The software ranges are configured via an SPI-/ the overranges have been tested, new plots were not generated MICROWIRE™-compatible serial interface. The AD5748 targets and substitution data was used for plotting purposes. applications in PLC and industrial process control. The analog input to the AD5748 is provided from a low voltage, single-supply,
Table 1. Related Device
digital-to-analog converter (DAC) and is internally conditioned
Part Number Description
to provide the desired output current/voltage range. The analog AD5422 Single-channel, 16-bit, serial input current input range is 0 V to 4.096 V. source and voltage output DAC
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Document Outline Features Applications General Description Table of Contents Revision History Functional Block Diagram Specifications Timing Characteristics Timing Diagrams Absolute Maximum Ratings ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Voltage Output Current Output Terminology Theory of Operation Software Mode Current Output Architecture Driving Inductive Loads Voltage Output Amplifier Driving Large Capacitive Loads Power-On State of the AD5748 Default Registers at Power-On Reset Function OUTEN Software Control Input Shift Register Readback Operation Hardware Control Transfer Function Detailed Description of Features Output Fault Alert—Software Mode Output Fault Alert—Hardware Mode Voltage Output Short-Circuit Protection Asynchronous Clear (CLEAR) Current Setting Resistor Packet Error Checking Applications Information Transient Voltage Protection Thermal Considerations Layout Guidelines Galvanically Isolated Interface Microprocessor Interfacing Outline Dimensions Ordering Guide