Current Output, Parallel Input, 16-/14-Bit

Multiplying DACs with 4-Quadrant Resistors

AD5546/AD5556

Rev. 0

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FEATURES

16-bit resolution

14-bit resolution

2- or 4-quadrant multiplying DAC

±1 LSB DNL

±1 LSB INL or ±2 LSB INL

Operating supply voltage: 2.7 V to 5.5 V

Low noise: 12 nV/

√Hz

0.5 µs settling time

Built-in 4-quadrant resistors allow 0 V to –10 V, 0 V to +10 V,

or ±10 V outputs

Automotive operating temperature: –40°C to +125°C

Compact TSSOP-28 package

APPLICATIONS

Automatic test equipment

Instrumentation

Digitally controlled calibration

Digital waveform generation

FUNCTIONAL BLOCK DIAGRAM

DAC

AD5546/

AD5556

WR

LDAC

MSB

RS

DB0–DB15

CONTROL

LOGIC

DAC

REGISTER

POR

16/14

GND

Figure 1. AD5546/AD5556 Simplified Block Diagram

GENERAL DESCRIPTION

The AD5546/AD5556 are precision 16-/14-bit, multiplying, low

power, current output, parallel input D/A converters. They

operate from a single 2.7 V to 5.5 V supply with ±10 V multi-

plying references for 4-quadrant outputs. Built-in 4-quadrant

resistors facilitate the resistance matching and temperature

tracking that minimize the number of components needed for

fies the I-V conversion with an external buffer. The AD5546/

AD5556 are packaged in compact TSSOP-28 packages with

operating temperatures from –40°C to +125°C.

16/14-BIT

2

5V

6

5

4

GND

VIN

TRIM

U3

ADR03

VOUT

5V

VDD

R1

ROFS

ROF

–VREF TO +VREF

VOUT

RFB

RFB

C2

GND

U1

AD5546/AD5556

IOUT

R2

U2A

OP2177

+

–

C1

–VREF

+VREF

RCOM

R1

16/14 DATA

REF

U2B

OP2177

–

+

WR

WR

LDAC

LDAC

RS

RS

MSB

MSB

Figure 2. 16-/14-Bit, 4-Quadrant Multiplying DAC with a Minimum of External Components