ANALOG DEVICES DAC8043 Service Manual

12-Bit Serial Input Multiplying CMOS

DAC8043

12-BIT DAC

12-BIT

DAC REGIST E R

12-BIT

SHIFT REGISTER

12

12

DAC8043

R

FB

V

REF

LD

CLK

SRI

GND

V

DD

I

OUT

R

FB

00271-001

FEATURES

12-bit accuracy in an 8-lead PDIP and SOIC package
Fast serial data input
Double data buffers
Low ±½ LSB maximum INL and ±1 LSB maximum DNL
Maximum gain error: 2 LSB
Low ±5 ppm/°C maximum tempco
ESD resistant
Low cost
Available in die form

APPLICATIONS

Autocalibration systems
Process control and industrial automation
Programmable amplifiers and attenuators
Digitally controlled filters

GENERAL DESCRIPTION

The DAC8043 is a high accuracy 12-bit CMOS multiplying
DAC in a space-saving 8-lead PDIP package. Featuring serial
data input, double buffering, and excellent analog performance,
the DAC8043 is ideal for applications where PC board space is
at a premium. In addition, improved linearity and gain error
performance permit reduced parts count 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 CLK pulse. When the new data word has been clocked
in, it is loaded into the DAC register with the

LD

input pin.

Digital-to-Analog Converter

FUNCTIONAL BLOCK DIAGRAM

Figure 1.

Data in the DAC register is converted to an output current by
the digital-to-analog converter (DAC).

The fast interface timing of the DAC8043 may reduce timing
design considerations while minimizing microprocessor wait
states. For applications requiring an asynchronous clear function
or more versatile microprocessor interface logic, refer to the

AD5443.

Operating from a single 5 V power supply, the DAC8043 is the
ideal low power, small size, high performance solution to many
application problems. It is available in a PDIP package that is
compatible with auto-insertion equipment. There is also a
16-lead SOIC pa

ckage available.

Rev. E

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