12-/14-Bit High Bandwidth

Multiplying DACs with Serial Interface

Data Sheet

AD5444/AD5446

Rev. E

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FEATURES

12 MHz multiplying bandwidth

INL of ± 0.5 LSB at 12 bits

Pin-compatible 12-/14-bit current output DAC

2.5 V to 5.5 V supply operation

10-lead MSOP package

±10 V reference input

50 MHz serial interface

2.7 MSPS update rate

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

4-quadrant multiplication

Power-on reset with brownout detection

0.4 µA typical current consumption

Guaranteed monotonic

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

Automotive radar

GENERAL DESCRIPTION

The AD5444/AD54461 are CMOS 12-bit and 14-bit, current

output, digital-to-analog converters (DACs). Operating from a

single 2.5 V to 5.5 V power supply, these devices are suited for

battery-powered and other applications.

As a result of the CMOS submicron manufacturing process,

these parts offer excellent 4-quadrant multiplication char-

acteristics of up to 12 MHz.

These DACs use a double-buffered, 3-wire serial interface that

is compatible with SPI®, QSPI™, MICROWIRE™, and most DSP

interface standards. On power-up, the internal shift register and

latches are filled with 0s, and the DAC output is at zero scale.

the full-scale output current. These parts can handle ±10 V

inputs on the reference, despite operating from a single-supply

power supply of 2.5 V to 5.5 V. An integrated feedback resistor

when combined with an external current-to-voltage precision

amplifier. The AD5444/AD5446 DACs are available in small

10-lead MSOP packages, which are pin-compatible with the

AD5425/AD5426/AD5432/AD5443 family of DACs.

The EV-AD5443/46/53SDZ board is available for evaluating

DAC performance. For more information, see the UG-327

evaluation board user guide.

1

US Patent Number 5,689,257.

FUNCTIONAL BLOCK DIAGRAM

POWER-ON

RESET

GND

R

SDO

CONTROL LOGIC AND

INPUT SHIFT REGISTER

DAC REGISTER

12-BIT

R-2R DAC

INPUT LATCH

SCLK

SDIN

SYNC

AD5444/

AD5446

Figure 1.