8-/10-/12-Bit, High Bandwidth

Multiplying DACs with Parallel Interface

Data Sheet

AD5424/AD5433/AD5445

Rev. D

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FEATURES

2.5 V to 5.5 V supply operation

Fast parallel interface (17 ns write cycle)

Update rate of 20.4 MSPS

INL of ±1 LSB for 12-bit DAC

10 MHz multiplying bandwidth

±10 V reference input

Extended temperature range: –40°C to +125°C

20-lead TSSOP and chip scale (4 mm × 4 mm) packages

8-, 10-, and 12-bit current output DACs

Upgrades to AD7524/AD7533/AD7545

Pin-compatible 8-, 10-, and 12-bit DACs in chip scale

Guaranteed monotonic

4-quadrant multiplication

Power-on reset with brownout detection

Readback function

0.4 µA typical power consumption

APPLICATIONS

Portable battery-powered applications

Waveform generators

Analog processing

Instrumentation applications

Programmable amplifiers and attenuators

Digitally controlled calibration

Programmable filters and oscillators

Composite video

Ultrasound

Gain, offset, and voltage trimming

GENERAL DESCRIPTION

The AD5424/AD5433/AD54451 are CMOS 8-, 10-, and 12-bit

current output digital-to-analog converters (DACs), respectively.

These devices operate from a 2.5 V to 5.5 V power supply,

making them suitable for battery-powered applications and

many other applications. These DACs utilize data readback,

allowing the user to read the contents of the DAC register via

the DB pins. On power-up, the internal register and latches are

filled with 0s and the DAC outputs are at zero scale.

As a result of manufacturing with a CMOS submicron process,

they offer excellent 4-quadrant multiplication characteristics,

with large signal multiplying bandwidths of up to 10 MHz.

provides temperature tracking and full-scale voltage output

when combined with an external I-to-V precision amplifier.

While these devices are upgrades of the AD5424/AD5433/

AD5445 in multiplying bandwidth performance, they have a

latched interface and cannot be used in transparent mode.

The AD5424 is available in small, 20-lead LFCSP and 16-lead

TSSOP packages, while the AD5433/AD5445 DACs are available

in small, 20-lead LFCSP and TSSOP packages.

The EVAL-AD5445SDZ evaluation board is available for

evaluating DAC performance. For more information, see the

UG-333 evaluation board user guide.

1

U.S Patent No. 5,689,257.

FUNCTIONAL BLOCK DIAGRAM

AD5424/

AD5433/

AD5445

CS

R/W

GND

DB0

DATA

INPUTS

DB7/DB9/DB11

POWER-ON

RESET

DAC REGISTER

INPUT LATCH

8-/10-/12-BIT

R-2R DAC

R

Figure 1.