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AD5422 Datasheet
(AD5412 / AD5422) Current Source & Voltage Output DAC
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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
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AD5422 Datasheet PDF



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