Single Channel, 12-/16-Bit, Serial Input, Current
Source and Voltage Output DACs, HART Connectivity
AD5412/AD5422
Data Sheet
FEATURES
GENERAL DESCRIPTION
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
The AD5412/AD5422 are low cost, precision, fully integrated
12-/16-bit digital-to-analog converters (DAC) offering a programmable current source and programmable voltage output
designed to meet the requirements of industrial process control
applications.
APPLICATIONS
Process controls
Actuator controls
PLC
HART network connectivity (LFCSP package only)
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.
AD5410
AD5420
Description
Single channel, 12-bit, serial input current source DAC
Single channel, 16-bit, serial input current source DAC
COMPANION PRODUCTS
HART Modem: AD5700, AD5700-1
Rev. O
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