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AD5748ACPZ Fiches technique(PDF) 1 Page - Analog Devices |
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AD5748ACPZ Fiches technique(HTML) 1 Page - Analog Devices |
1 / 32 page Industrial Current/Voltage Output Driver with Programmable Ranges AD5748 Rev. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringementsof patentsorother rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 ©2010 Analog Devices, Inc. All rights reserved. FEATURES Current output ranges: 4 mA to 21 mA, 0 mA to 21 mA ±0.15% FSR total unadjusted error (TUE) ±5 ppm/°C FSR typical output drift Voltage output ranges: 0 V to 5 V, 0 V to 10.5 V, ±10.5 V ±0.05% FSR total unadjusted error (TUE) ±3 ppm/°C FSR 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 APPLICATIONS Process control Actuator control PLCs GENERAL DESCRIPTION The AD5748 is a single-channel, low cost, precision, voltage/ current output driver with hardware or software programmable output ranges. The software ranges are configured via an SPI-/ MICROWIRE™-compatible serial interface. The AD5748 targets applications in PLC and industrial process control. The analog input to the AD5748 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. The analog input range is 0 V to 4.096 V. The output current range is programmable across two current ranges: 4 mA to 21 mA and 0 mA to 21 mA. Voltage output is provided from a separate pin that can be configured to provide 0 V to 5 V, 0 V to 10.5 V, or ±10.5 V output range. Analog outputs are short-circuit and open-circuit protected and can drive capacitive loads of 2 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 a 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. Note that the plots in the Typical Performance Characteristics section of this data sheet contain information on the standard ranges, as released in the AD5750/AD5750-1 data sheet. Although the overranges have been tested, new plots were not generated and substitution data was used for plotting purposes. Table 1. Related Device Part Number Description AD5422 Single-channel, 16-bit, serial input current source and voltage output DAC |
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