Quad Channel, 16-Bit,

Serial Input, 4-20mA Output DAC,

Dynamic Power Control, HART Connectivity

Preliminary Technical Data

AD5757/AD5737

Rev. PrD

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FEATURES

16/12-Bit Resolution and Monotonicity

Dynamic Power Control for Thermal Management

IOUT Range: 0mA-20mA, 4mA–20mA or 0mA–24mA

±0.05% Total Unadjusted Error (TUE) Max

User programmable Offset and Gain

On Chip Diagnostics

On-Chip Reference (±5 ppm/°C Max)

−40°C to +105°C Temperature Range

APPLICATIONS

Process Control

Actuator Control

PLC’s

HART Network Connectivity

PRODUCT HIGHLIGHTS

Dynamic Power Control for Thermal management

16bit performance

Multi-channel

HART Compliant

GENERAL DESCRIPTION

The AD5757/AD5737 is a quad, current output DAC, which

operates with a power supply of up to +33v. On chip dynamic

power control minimizes package power dissipation in current

mode. This is achieved by regulating the voltage on the output

driver from between 7V-30V.

Each channel has a corresponding CHART pin so that HART

signals can be coupled onto the AD5757/AD5737’s current

output.

The part uses a versatile 3-wire serial interface that operates at

clock rates up to 30 MHz and that is compatible with standard

SPI®, QSPI™, MICROWIRE™, DSP and microcontroller

interface standards. The interface also features optional CRC-8

packet error checking as well as a watchdog timer that monitors

activity on the interface.

Table 1. Complementary Devices

Part No.

Description

ADR445

5V, Ultralow Noise, LDO XFET Voltage

Reference with Current Sink and Source

ADP1871

Synchronous Buck Controller with Constant

On-Time, Valley Current Mode, and Power

Save Mode

Figure 1.