12-Bit Serial Input
Multiplying DAC
AD5441
Rev. A
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FEATURES
2.5 V to 5.5 V supply operation
True 12-bit accuracy
5 V operation @ <1 μA
Fast 3-wire serial input
Fast 5 μs settling time
1.9 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
V
DD
V
REF
LD
CLK
SRI
GND
I
OUT
R
FB
06492-001
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 1 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.
