5 V, 12-Bit nanoDAC, Serial Interface

in MSOP and LFCSP Packages

AD5626

Rev. 0

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FEATURES

8-lead MSOP and 8-lead LFCSP packages

Complete voltage output with internal reference

1 mV/bit with 4.095 V full scale

5 V single-supply operation

No external components required

3-wire serial interface, 20 MHz data loading rate

Low power: 2.5 mW

APPLICATIONS

Portable instrumentation

Digitally controlled calibration

Servo controls

Process control equipment

PC peripherals

GENERAL DESCRIPTION

The AD5626, a member of the nanoDAC® family, is a complete

serial input, 12-bit, voltage output digital-to-analog converter

(DAC) designed to operate from a single 5 V supply. It contains

the DAC, input shift register and latches, reference, and a rail-

to-rail output amplifier. The AD5626 monolithic DAC offers

the user low cost and ease of use in 5 V only systems.

Coding for the AD5626 is natural binary with the MSB loaded

first. The output op amp can swing to either rail and is set to a

range of 0 V to 4.095 V for a one-millivolt-per-bit resolution. It

is capable of sinking and sourcing 5 mA. An on-chip reference

is laser trimmed to provide an accurate full-scale output voltage

of 4.095 V.

This part features a serial interface that is high speed, three-

wire, DSP compatible with data in (SDIN), clock (SCLK), and

load strobe (LDAC). There is also a chip-select pin for

connecting multiple DACs.

The CLR input sets the output to zero scale at power on or upon

user demand.

The AD5626 is specified over the extended industrial tempera-

ture range (–40°C to +85°C). The AD5626 is available in MSOP

and LFCSP surface-mount packages.

FUNCTIONAL BLOCK DIAGRAM

REF

DAC REGISTER

AD5626

INPUT

REGISTER

12-BIT DAC

OUTPUT

BUFFER

LDAC

CLR

CS

SCLK SDIN

GND

Figure 1.