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Analog Devices Semiconductor Electronic Components Datasheet

AD5422 Datasheet

(AD5412 / AD5422) Current Source & Voltage Output DAC

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AD5422 pdf
Data Sheet
Single Channel, 12-/16-Bit, Serial Input, Current
Source and Voltage Output DACs, HART Connectivity
AD5412/AD5422
FEATURES
12-/16-bit resolution and monotonicity
Current output ranges: 4 mA to 20 mA, 0 mA to 20 mA, or
0 mA to 24 mA
±0.01% FSR typical total unadjusted error (TUE)
±3 ppm FSR/°C output drift
Voltage output ranges: 0 V to 5 V, 0 V to 10 V, ±5 V, or ±10 V
10% overrange
±0.01% FSR typical TUE
±2 ppm FSR/°C output drift
Flexible serial digital interface
On-chip output fault detection
On-chip reference: 10 ppm/°C maximum
Optional regulated DVCC output
Asynchronous clear function
Power supply range
AVDD: 10.8 V to 40 V
AVSS: −26.4 V to −3 V/0 V
Current loop compliance voltage: AVDD – 2.5 V
Temperature range: −40°C to +105°C
TSSOP and LFCSP packages
APPLICATIONS
Process controls
Actuator controls
PLC
HART network connectivity (LFCSP package only)
GENERAL DESCRIPTION
The AD5412/AD5422 are low cost, precision, fully integrated
12-/16-bit digital-to-analog converters (DAC) offering a pro-
grammable current source and programmable voltage output
designed to meet the requirements of industrial process control
applications.
The output current range is programmable at 4 mA to 20 mA,
0 mA to 20 mA, or an overrange function of 0 mA to 24 mA.
The LFCSP version of this product has a CAP2 pin so that the
HART signals can be coupled onto the current output of the
AD5412/AD5422.
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 10% is available on all ranges.
Analog outputs are short and open-circuit protected and can
drive capacitive loads of 1 µF.
The device operates with an AVDD power supply range from 10.8 V
to 40 V. Current loop compliance voltage is 0 V to AVDD − 2.5 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 device also includes a power-on-reset function, ensuring
that the device powers up in a known state. The part also includes
an asynchronous clear pin (CLEAR) that sets the outputs to
zero-scale/midscale voltage output or the low end of the
selected current range.
The total output error is typically ±0.01% in current mode and
±0.01% in voltage mode.
Table 1. Pin-Compatible Devices
Part No. Description
AD5410 Single channel, 12-bit, serial input current source DAC
AD5420 Single channel, 16-bit, serial input current source DAC
COMPANION PRODUCTS
HART Modem: AD5700, AD5700-1
Rev. M
Document Feedback
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responsibilityisassumedbyAnalogDevices for itsuse,nor foranyinfringementsofpatentsor 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.
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One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 ©2009–2016 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com


Analog Devices Semiconductor Electronic Components Datasheet

AD5422 Datasheet

(AD5412 / AD5422) Current Source & Voltage Output DAC

No Preview Available !

AD5422 pdf
AD5412/AD5422
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
General Description ......................................................................... 1
Companion Products ....................................................................... 1
Revision History ............................................................................... 3
Functional Block Diagram .............................................................. 4
Specifications..................................................................................... 5
AC Performance Characteristics .............................................. 10
Timing Characteristics .............................................................. 10
Absolute Maximum Ratings.......................................................... 13
ESD Caution................................................................................ 13
Pin Configurations and Function Descriptions ......................... 14
Typical Performance Characteristics ........................................... 16
General......................................................................................... 16
Voltage Output............................................................................ 18
Current Output ........................................................................... 23
Terminology .................................................................................... 27
Theory of Operation ...................................................................... 29
Architecture................................................................................. 29
Serial Interface ............................................................................ 30
Power-On State ........................................................................... 31
Data Register ............................................................................... 33
Control Register.......................................................................... 33
Reset Register.............................................................................. 34
Status Register............................................................................. 34
AD5412/AD5422 Features ............................................................ 35
Data Sheet
Fault Alert.................................................................................... 35
Voltage Output Short Circuit Protection ................................ 35
Voltage Output Overrange ........................................................ 35
Voltage Output Force-Sense ..................................................... 35
Asynchronous Clear (CLEAR) ................................................. 35
Internal Reference ...................................................................... 35
External Current Setting Resistor ............................................ 35
Digital Power Supply.................................................................. 36
External Boost Function............................................................ 36
External Compensation Capacitor........................................... 36
HART Communication............................................................. 36
Digital Slew Rate Control.......................................................... 36
IOUT Filtering Capacitors (LFCSP Package)............................. 37
Applications Information .............................................................. 39
Voltage and Current Output Ranges on the Same Terminal 39
Driving Inductive Loads............................................................ 39
Transient Voltage Protection .................................................... 39
Galvanically Isolated Interface ................................................. 39
Microprocessor Interfacing....................................................... 39
Layout Guidelines....................................................................... 40
Thermal and Supply Considerations ....................................... 40
Industrial Analog Output Module ........................................... 41
Industrial HART Capable Analog Output Application ........ 41
Outline Dimensions ....................................................................... 43
Ordering Guide .......................................................................... 44
Rev. M | Page 2 of 44


Part Number AD5422
Description (AD5412 / AD5422) Current Source & Voltage Output DAC
Maker Analog Devices
Total Page 30 Pages
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