Analog Devices AD5545 56 0 Datasheet

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

Multiplying DACs with 4-Quadrant Resistors

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
Low power: I

0.5 µs settling time
Built-in RFB facilitates current-to-voltage conversion
Built-in 4-quadrant resistors allow 0 V to –10 V, 0 V to +10 V,

or ±10 V outputs
2 mA full-scale current ±20%, with V
Automotive operating temperature: –40°C to +125°C
Compact TSSOP-28 package

APPLICATIONS

Automatic test equipment
Instrumentation
Digitally controlled calibration
Digital waveform generation

= 10 µA

DD

= 10 V

REF

AD5546/AD5556

FUNCTIONAL BLOCK DIAGRAM

R1R

R1R

WR

AD5546/

DD

AD5556

V

LDAC

DB0–DB15

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 multi­plying 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
multiquadrant applications. The feedback resistor (R
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.

COM

2

CONTROL

LOGIC

POR

MSB RS

REF R

OFS

R

OFSRFB

16/14

REGISTER

DAC

DAC

R

FB

I

OUT

GND

03810-0-001

) simpli-

FB

5V

2

VIN

U3

ADR03

TRIM

VOUT

GND

4

5V VDD

16/14 DATA

LDAC

MSB

5
6

AD5546/AD5556

WRWRLDAC

+

U2A

OP2177

–

C1

–VREF +VREF

RCOMR1

R

1

U1

RSRSMSB

REF

R2

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

Rev. 0

Information furnished by Analog Devices is believed to be accurate and reliable.
However, no responsibility is assumed by Analog Devices for its use, nor for any
infringements of patents or other rights of third parties that may result from its use.
Specifications subject to change without notice. No license is granted by implication
or otherwise under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective owners.

ROF

RFB

ROFS

RFB

C2

16/14-BIT

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: [phone]
Fax: [phone] © 2004 Analog Devices, Inc. All rights reserved.

IOUT

GND

–

U2B

OP2177

+

–VREF TO +VREF

VOUT

03810-0-002

www.analog.com

AD5546/AD5556

TABLE OF CONTENTS

Specifications..................................................................................... 3

Absolute Maximum Ratings............................................................ 5

Pin Configurations and Functional Descriptions ........................ 6

Typical Performance Characteristics ............................................. 8

Circuit Operation ...........................................................................11

D/A Converter Section .............................................................. 11

Digital Section............................................................................. 12

ESD Protection Circuits............................................................. 12

Amplifier Selection..................................................................... 12

REVISION HISTORY

Revision 0: Initial Version

Reference Selection .................................................................... 12

Applications..................................................................................... 13

Unipolar Mode ........................................................................... 13

Bipolar Mode .............................................................................. 14

AC Reference Signal Attenuator ............................................... 15

System Calibration ..................................................................... 15

Outline Dimensions....................................................................... 16

Ordering Guide .......................................................................... 16

Rev. 0 | Page 2 of 16

AD5546/AD5556

SPECIFICATIONS

Table 1. Electrical Characteristics. VDD = 2.7 V to 5.5 V, I
temperature range, unless otherwise noted.

Parameter Symbol Conditions Min Typ Max Unit

STATIC PERFORMANCE

Resolution N

Resolution N

1

AD5546, 1 LSB = V
V

= 10 V

REF

AD5556, 1 LSB = V

= 10 V

V

REF

Relative Accuracy INL Grade: AD5556C ±1 LSB

Relative Accuracy INL Grade: AD5546B ±2 LSB

Differential Nonlinearity DNL Monotonic ±1 LSB

Output Leakage Current I

Output Leakage Current I

Full-Scale Gain Error G

Bipolar Mode Gain Error G

Bipolar Mode Zero-Scale

OUT

OUT

FSE

E

G

ZSE

Data = zero scale, TA = 25°C 10 nA
Data = zero scale, TA = TA maximum 20 nA
Data = full scale ±1 ±4 mV
Data = full scale ±1 ±4 mV
Data = full scale ±1 ±2.5 mV

Error

Full-Scale Tempco2 TCV

FS

1 ppm/°C

REFERENCE INPUT

V

Range V

REF

REF

–18 +18 V
REF Input Resistance REF 4 5 6 kΩ
R1 and R2 Resistance R1 and R2 4 5 6 kΩ
R1-to-R2 Mismatch ∆(R1 to R2) ±0.5 ±1.5 Ω

R

Feedback and Offset
Resistance

Input Capacitance

2

, R

FB

OFS

C

REF

5 pF

ANALOG OUTPUT

Output Current I
Output Capacitance2 C

OUT

OUT

Data = full scale 2 mA

Code dependent 200 pF

LOGIC INPUT AND OUTPUT

Logic Input Low Voltage V
Logic Input Low Voltage V
Logic Input High Voltage V
Logic Input High Voltage V
Input Leakage Current I

IL

IL

IH

IH

IL

VDD = 5 V 0.8 V

VDD = 3 V 0.4 V

VDD = 5 V 2.4 V

VDD = 3 V 2.1 V

10 µA
Input Capacitance2 CIL 10 pF

, 3

INTERFACE TIMING

Data to WR Setup Time
V
Data to WR Hold Time
V
WR Pulse Width

V
LDAC Pulse Width t
V
RS Pulse Width
V
WR to LDAC Delay Time
V

2

t

t

t

t

t

DS

DH

WR

LDAC

RS

LWD

VDD = 5 V 20 ns

= 3 V 35 ns

DD

VDD = 5 V 0 ns

= 3 V 0 ns

DD

VDD = 5 V 20 ns

= 3 V 35 ns

DD

VDD = 5 V 20 ns

= 3 V 35 ns

DD

VDD = 5 V 20 ns

= 3 V 35 ns

DD

VDD = 5 V 0 ns

= 3 V 0 ns

DD

= virtual GND, GND = 0 V, V

OUT

/216 = 153 µV at

REF

/214 = 610 µV at

REF

= –10 V to 10 V, TA = full operating

REF

16 Bits

14 Bits

8 10 12 kΩ

Rev. 0 | Page 3 of 16

AD5546/AD5556

Parameter Symbol Condition Min Typ Max Unit

SUPPLY CHARACTERISTICS

Power Supply Range V
Positive Supply Current I
Power Dissipation P
Power Supply Sensitivity P

AC CHARACTERISTICS

4

Output Voltage Settling

DD RANGE

DD

DISS

SS

t

S

Time
Reference Multiplying BW BW V
DAC Glitch Impulse Q V
Multiplying Feedthrough

V

OUT/VREFVREF

Error
Digital Feedthrough Q

D

Total Harmonic Distortion THD V
Output Noise Density e

N

1

All static performance tests (except I

tied to the amplifier output. The op amp +IN is grounded and the DAC I

2

These parameters are guaranteed by design and not subject to production testing.

3

All input control signals are specified with tR = tF = 2.5 ns (10% to 90% of 3 V), and timed from a voltage level of 1.5 V.

4

All ac characteristic tests are performed in a closed-loop system using an AD841 I-V converter amplifier.

) are performed in a closed-loop system, using an external precision OP97 I-V converter amplifier. The AD554x RFB terminal is

OUT

2.7 5.5 V
Logic inputs = 0 V 10 µA
Logic inputs = 0 V 0.055 mW
∆VDD = ±5% 0.003 %/%

To ±0.1% of full scale, data cycles from zero scale to full scale

0.5 µs

to zero scale

= 5 V p-p, data = full scale 4 MHz

REF

= 0 V, midscale to midscale minus 1 7 nV-s

REF

= 100 mV rms, f = 10 kHz –65 dB

WR = 1, LDAC toggles at 1MHz

= 5 V p-p, data = full-scale, f = 1 KHz –85 dB

REF

f = 1 kHz, BW = 1 Hz 12

7 nV-s

nV/rt
Hz

is tied to the op amp –IN. Typical values represent average readings measured at 25°C.

OUT

Rev. 0 | Page 4 of 16

AD5546/AD5556

ABSOLUTE MAXIMUM RATINGS

Table 2.

Parameter Rating

VDD to GND –0.3 V, +8 V

RFB, R

, R1, R

OFS

Logic Inputs to GND –0.3 V, +8 V

V(I

) to GND –0.3 V, VDD + 0.3 V

OUT

Input Current to Any Pin except Supplies ±50 mA

Thermal Resistance (θJA) 128°C

Maximum Junction Temperature (TJ

Operating Temperature Range –40°C to +125°C

Storage Temperature Range –65°C to +150°C

Lead Temperature:

Vapor Phase, 60 s 215°C
Infrared, 15 s 220°C

Package Power Dissipation (T

ESD CAUTION

ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on

the human body and test equipment and can discharge without detection. Although this product features

proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy

electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance

degradation or loss of functionality.

, and REF to GND –18 V, 18 V

COM

) 150°C

MAX

J MAX

– TA)/θ

JA

Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those listed in the operational sections
of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.

Rev. 0 | Page 5 of 16