Datasheet AD5749 (Analog Devices)

Industrial Current Out Driver, Single-Supply, 55 V Maximum Supply, Programmable Ranges Data Sheet AD5749 FEATURES FUNCTIONAL BLOCK DIAGRAM Current output ranges: 0 mA to 24 mA or 4 mA to 20 mA DVCC GND AVDD GND ±0.03% FSR typical total unadjusted error (TUE) CLEAR ±5 ppm/°C typical output drift CLRSEL INPUT SHIFT SCLK/OUTEN * AD5749 2% overrange REGISTER SDIN/R0 * AND Flexible serial digital interface SYNC/RSET * CONTROL On-chip output fault detection SDO LOGIC AVDD PEC error checking HW SELECT STATUS Asynchronous CLEAR function REGISTER R2 R3 Power supply range VIN AV VREF DD: 12 V (± 10%) to 55 V (maximum) Output loop compliance to AVDD − 2.75 V IOUT RANGE RESET Temperature range: −40°C to +105°C SCALING IOUT 32-lead, 5 mm × 5 mm LFCSP package APPLICATIONS FAULT/TEMP * OVERTEMP REXT1 NC/IFAULT * IOUT OPEN FAULT Process control RSET REXT2 IOUT OPEN FAULT Actuator control PLCs POWER- ON RESET IOUT OPEN FAULT AD2/R1 * AD1/R2 * AD0/R3 * *DENOTES SHARED PIN. SOFTWARE MODE DENOTED BY REGULAR TEXT,
1
HARDWARE MODE DENOTED BY ITALIC TEXT. FOR EXAMPLE, FOR
00 3-
FAULT/TEMP PIN, IN SOFTWARE MODE, THIS PIN TAKES ON FAULT FUNCTION. IN HARDWARE MODE, THIS PIN TAKES ON TEMP FUNCTION.
0892 Figure 1.
GENERAL DESCRIPTION
The AD5749 is a single channel, low cost, precision, current output error checking, useful in industrial environments where data driver with hardware or software programmable output ranges. communication corruption can occur. The software ranges are configured via an SPI-/MICROWIRE™- The device also includes a power-on reset function ensuring compatible serial interface. The AD5749 targets applications in that the device powers up in a known state and an asynchron- PLC and industrial process control. The analog input to the ous CLEAR pin that sets the outputs to the low end of the AD5749 is provided from a low voltage, single-supply digital-to- selected current range. analog converter (DAC) and is internally conditioned to provide the desired output current/voltage range. An HW SELECT pin is used to configure the part for hardware or software mode on power-up. The output current range is programmable across two current ranges: 0 mA to 24 mA, or 4 mA to 20 mA. Current output is
Table 1. Related Devices
open-circuit protected and can drive inductive loads of 0.1 H.
Part No. Description
The device is specified to operate with a power supply range AD5750 Industrial current/voltage output (I/V) driver with programmable ranges from 10.8 V to 55 V. Output loop compliance is 0 V to AVDD − AD5751 Industrial I/V output driver, single-supply, 55 V maximum 2.75 V. supply, programmable ranges The flexible serial interface is SPI and MICROWIRE compatible AD5748 Industrial I/V output driver with programmable ranges and can be operated in 3-wire mode to minimize the digital AD5410/ Single-channel, 12-/16-bit, serial input, current source AD5420 output DAC isolation required in isolated applications. The interface also AD5412/ Single-channel, 12-/16-bit, serial input, I/V output DAC features an optional PEC error checking feature using CRC-8 AD5422
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Document Outline FEATURES APPLICATIONS FUNCTIONAL BLOCK DIAGRAM GENERAL DESCRIPTION REVISION HISTORY TIMING CHARACTERISTICS Timing Diagrams ESD CAUTION SOFTWARE MODE CURRENT OUTPUT ARCHITECTURE DRIVING INDUCTIVE LOADS POWER-ON STATE OF THE AD5749 DEFAULT REGISTERS AT POWER-ON RESET FUNCTION OUTEN SOFTWARE CONTROL Input Shift Register Status Bit Read Operation HARDWARE CONTROL TRANSFER FUNCTION OUTPUT FAULT ALERT—SOFTWARE MODE OUTPUT FAULT ALERT—HARDWARE MODE ASYNCHRONOUS CLEAR (CLEAR) EXTERNAL CURRENT SETTING RESISTOR PROGRAMMABLE OVERRANGE MODES PACKET ERROR CHECKING TRANSIENT VOLTAGE PROTECTION THERMAL CONSIDERATIONS LAYOUT GUIDELINES GALVANICALLY ISOLATED INTERFACE MICROPROCESSOR INTERFACING ORDERING GUIDE