Quad Channel, 12-Bit, Serial Input, 4-20mA Output DAC with Dynamic Power Control and HART Connectivity

The AD5737 is a quad-channel current output DAC that operates with a power supply range from 10.8 V to 33 V. On-chip dynamic power control minimizes package power dissipation by regulating the voltage on the output driver from 7.4 V to 29.5 V using a dc-to-dc boost converter optimized for minimum on-chip power dissipation.

Each channel has a corresponding CHART pin so that HART signals can be coupled onto the current output of the AD5737.

The AD5737 uses a versatile 3-wire serial interface that operates at clock rates of up to 30 MHz and is compatible with standard SPI, QSPI™, MICROWIRE®, DSP, and microcontroller interface standards. The serial interface also features optional CRC-8 packet error checking, as well as a watchdog timer that monitors activity on the interface.

For a 16 bit equivalent solution, look at the AD5757. For a voltage and current configurable version, see the AD5755, AD5755-1 or AD5735.

Product Highlights

* Dynamic power control for thermal management.

* 12-bit performance.

* Quad channel.

* HART compliant.

Applications

* Process control

* Actuator Control

* PLCs

* HART Network Connectivity

* 12-Bit Resolution and Monotonicity

* Dynamic Power Control for Thermal Management or external PMOS mode

* IOUT Range: 0mA-20mA, 4mA–20mA or 0mA–24mA ±0.1% (TUE) Maximum

* User programmable Offset and Gain

* On-Chip Diagnostics

* On-Chip Reference: ±10 ppm/°C maximum

* −40°C to +105°C Temperature Range