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Analog Devices Semiconductor Electronic Components Datasheet

AD5748 Datasheet

Industrial Current/Voltage Output Driver

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AD5748 pdf
Industrial Current/Voltage Output Driverwww.DataSheet4U.com
with Programmable Ranges
AD5748
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
Rev. 0
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
rights of third parties that may result from its use. Specifications subject to change without notice. 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.


Analog Devices Semiconductor Electronic Components Datasheet

AD5748 Datasheet

Industrial Current/Voltage Output Driver

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AD5748 pdf
AD5748
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Functional Block Diagram .............................................................. 3
Specifications..................................................................................... 4
Timing Characteristics ................................................................ 7
Absolute Maximum Ratings............................................................ 9
ESD Caution.................................................................................. 9
Pin Configuration and Function Descriptions........................... 10
Typical Performance Characteristics ........................................... 12
Voltage Output............................................................................ 12
Current Output ........................................................................... 16
Terminology .................................................................................... 21
Theory of Operation ...................................................................... 22
Software Mode ............................................................................ 22
Current Output Architecture.................................................... 24
Driving Inductive Loads............................................................ 24
Power-On State of the AD5748 ................................................ 24
Default Registers at Power-On ................................................. 25
REVISION HISTORY
3/10—Revision 0: Initial Version
www.DataSheet4U.com
Reset Function ............................................................................ 25
OUTEN........................................................................................ 25
Software Control ........................................................................ 25
Hardware Control ...................................................................... 27
Transfer Function....................................................................... 27
Detailed Description of Features.................................................. 28
Output Fault Alert—Software Mode ....................................... 28
Output Fault Alert—Hardware Mode ..................................... 28
Voltage Output Short-Circuit Protection................................ 28
Asynchronous Clear (CLEAR) ................................................. 28
Current Setting Resistor ............................................................ 29
Packet Error Checking............................................................... 29
Applications Information .............................................................. 30
Transient Voltage Protection .................................................... 30
Thermal Considerations............................................................ 30
Layout Guidelines....................................................................... 30
Galvanically Isolated Interface ................................................. 31
Microprocessor Interfacing....................................................... 31
Outline Dimensions ....................................................................... 32
Ordering Guide .......................................................................... 32
Rev. 0 | Page 2 of 32


Part Number AD5748
Description Industrial Current/Voltage Output Driver
Maker Analog Devices
Total Page 30 Pages
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