Industrial Current/Voltage Output Driver with Programmable Ranges Data Sheet AD5748 The output current range is programmable across two current FEATURES 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 F and inductive loads of 0.1 H. Flexible serial digital interface The device is specified to operate with a power supply range from On-chip output fault detection 12 V to 24 V. Output loop compliance is 0 V to AVDD 2.75 V. PEC error checking 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 AV : +12 V ( 10%) to +24 V ( 10%) DD features an optional PEC error checking feature using CRC-8 AV : 12 V ( 10%) to 24 V ( 10%) SS error checking, useful in industrial environments where data Output loop compliance to AV 2.75 V DD communication corruption can occur. Temperature range: 40C to +105C 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), and an asynchronous CLEAR pin that sets the outputs to zero APPLICATIONS scale/midscale voltage output or the low end of the selected Process control current range. Actuator control 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 Rev. B Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. No Tel: 781.329.4700 20102014 Analog Devices, Inc. All rights reserved. license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Technical Support www.analog.com Trademarks and registered trademarks are the property of their respective owners. AD5748 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Reset Function ............................................................................ 25 Applications ....................................................................................... 1 OUTE N ........................................................................................ 25 General Description ......................................................................... 1 Software Control ........................................................................ 25 Revision History ............................................................................... 2 Hardware Control ...................................................................... 27 Functional Block Diagram .............................................................. 3 Transfer Function ....................................................................... 27 Specif icat ions ..................................................................................... 4 Detailed Description of Features .................................................. 28 Timing Characteristics ................................................................ 7 Output Fault AlertSoftware Mode ....................................... 28 Absolute Maximum Ratings ............................................................ 9 Output Fault AlertHardware Mode ..................................... 28 ESD Caution .................................................................................. 9 Voltage Output Short-Circuit Protection ................................ 28 Pin Configuration and Function Descriptions ........................... 10 Asynchronous Clear (CLEAR) ................................................. 28 Typical Performance Characteristics ........................................... 12 Current Setting Resistor ............................................................ 29 Voltage Output ............................................................................ 12 Packet Error Checking ............................................................... 29 Current Output ........................................................................... 16 Applications Information .............................................................. 30 Terminology .................................................................................... 21 Transient Voltage Protection .................................................... 30 Theory of Operation ...................................................................... 22 Thermal Considerations ............................................................ 30 Software Mode ............................................................................ 22 Layout Guidelines....................................................................... 30 Current Output Architecture .................................................... 24 Galvanically Isolated Interface ................................................. 31 Driving Inductive Loads ............................................................ 24 Microprocessor Interfacing ....................................................... 31 Power-On State of the AD5748 ................................................ 24 Outline Dimensions ....................................................................... 32 Default Registers at Power-On ................................................. 25 Ordering Guide .......................................................................... 32 REVISION HISTORY 9/14Rev. A to Rev. B Change to Table 4 ............................................................................. 9 Change to Figure 4 ......................................................................... 10 Changes to Figure 44 ...................................................................... 19 Changes to Asynchronous Clear (CLEAR) Section ................... 28 Changes to Thermal Considerations Section ............................. 30 Updated Outline Dimensions ....................................................... 32 Changes to Ordering Guide .......................................................... 32 5/10Rev. 0 to Rev. A Changes to Table 2, Power Requirements ..................................... 6 3/10Revision 0: Initial Version Rev. B Page 2 of 32