12-Bit Serial Input

Multiplying DAC

Preliminary Technical Data

AD5441

Rev. PrA

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FEATURES

3 V to 5 V supply operation

True 12-bit accuracy

5 V operation @ <10 μA

Fast 3-wire serial input

Fast 1 μs settling time

2.4 MHz, 4-quadrant multiply BW

Upgrade for DAC8043 and DAC8043A

Standard and rotated pinout

APPLICATIONS

Ideal for PLC applications in industrial control

Programmable amplifiers and attenuators

Digitally controlled calibration and filters

Motion control systems

FUNCTIONAL BLOCK DIAGRAM

12-BIT SHIFT

REGISTER

DAC REG

12

12

DAC

AD5441

LD

CLK

SRI

GND

Figure 1.

GENERAL DESCRIPTION

The AD5441 is an improved high accuracy 12-bit multiplying

digital-to-analog converter (DAC) in space-saving 8-lead

packages. Featuring serial input, double buffering, and excellent

analog performance, the AD5441 is ideal for applications where

PC board space is at a premium. Improved linearity and gain

error performance permit reduced part counts through the

elimination of trimming components. Separate input clock and

load DAC control lines allow full user control of data loading

and analog output.

The circuit consists of a 12-bit serial-in/parallel-out shift

register, a 12-bit DAC register, a 12-bit CMOS DAC, and

control logic. Serial data is clocked into the input register on the

rising edge of the CLOCK pulse. When the new data-word is

clocked in, it is loaded into the DAC register with the LD input

pin. Data in the DAC register is converted to an output current

by the DAC.

Consuming only 10 μA from a single 5 V power supply, the

AD5441 is the ideal low power, small size, high performance

solution to many application problems.

The AD5441 is specified over the extended industrial (−40°C to

+125°C) temperature range. It is available in an 8-lead LFCSP

and an 8-lead MSOP.

CODE

0.1

0

–0.1

0

1024

2048

3072

4096

–0.5

0.5

0.4

0.3

0.2

–0.2

–0.3

–0.4

512

1536

2560

3584

Figure 2. Integral Nonlinearity Error vs. Code