Analog Devices AD5545 55 Datasheet

K

Dual, Current-Output,

Serial-Input, 16-/14-Bit DAC

AD5545/AD5555

FEATURES

FUNCTIONAL BLOCK DIAGRAM

16-bit resolution AD5545
14-bit resolution AD5555
±1 LSB DNL monotonic
±2 LSB INL AD5545
2 mA full-scale current ±20%, with V

= 10 V

REF

0.5 µs settling time
2Q multiplying reference-input 4 MHz BW
Zero or midscale power-up preset
Zero or midscale dynamic reset
3-wire interface
Compact TSSOP-16 package

APPLICATIONS

V

DD

SDI

CS

CL

16 OR 14

D0..DX

EN

DAC A

B

ADDR

DECODE

DGND MSB

INPUT

REGISTER

INPUT

REGISTER

POWER-

ON

RESET

RS LDAC

R

R

Figure 1.

Automatic test equipment
Instrumentation
Digitally controlled calibration
Industrial control PLCs
Programmable attentuator

PRODUCT OVERVIEW

DAC A

REGISTER

DAC B

REGISTER

BV

A

V

REF

REF

RFBA

I

DAC A

R

DAC B

R

AD5545/

AD5555

02918-0-001

OUT

A

RFBB

I

OUT

A

A

A

GND

B

B

GND

The AD5545/AD5555 are 16-bit/14-bit, current-output, digital­to-analog converters designed to operate from a single 5 V
supply with bipolar output up to ±15 V capability.

An external reference is needed to establish the full-scale out­put-current. An internal feedback resistor (R

) enhances the

FB

resistance and temperature tracking when combined with an
external op amp to complete the I-to-V conversion.

A serial data interface offers high speed, 3-wire microcontroller
compatible inputs using serial data in (SDI), clock (CLK), and
chip select (

). Additional

CS

function allows simultane-

LDAC

ous update operation. The internal reset logic allows power-on
preset and dynamic reset at either zero or midscale, depending
on the state of the MSB pin.

The AD5545/AD5555 are packaged in the compact TSSOP-16
package and can be operated from –40°C to +85°C.

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 companies.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: [phone] www.analog.com
Fax: [phone] © 2003 Analog Devices, Inc. All rights reserved.

AD5545/AD5555

TABLE OF CONTENTS

AD5545/AD5555—Electrical Characteristics .............................. 3

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

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

Pin Configuration And Functional Descriptions......................... 6

Typical Performance Characteristics ............................................. 9

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

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

Serial Data Interface................................................................... 11

Power-Up Sequence ...................................................................12

Layout and Power Supply Bypassing .......................................12

Grounding................................................................................... 12

REVISION HISTORY

Revision 0: Initial Version

Stability ........................................................................................ 13

Positive Voltage Output ............................................................. 13

Bipolar Output............................................................................ 13

Programmable Current Source ................................................ 13

DAC with Programmable Input Reference Range................ 14

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

ESD Caution................................................................................ 16

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

Rev. 0 | Page 2 of 16

AD5545/AD5555

AD5545/AD5555—ELECTRICAL CHARACTERISTICS

Table 1. VDD = 5 V ± 10%, I
unless otherwise noted.

Parameter Symbol Conditions 5 V ± 10% Units

STATIC PERFORMANCE1

Resolution N AD5545, 1 LSB = V
Resolution N AD5555, 1 LSB = V
Relative Accuracy INL AD5545 ±2 LSB max
Relative Accuracy INL AD5555 ±1 LSB max
Differential Nonlinearity DNL Monotonic ±1 LSB max
Output Leakage Current I
Output Leakage Current I
Full-Scale Gain Error G
Full-Scale Temperature Coefficient2 TCVFS 1 ppm/°C typ

REFERENCE INPUT

V

Range V

REF

Input Resistance R
Input Capacitance2 C

ANALOG OUTPUT

Output Current I
Output Capacitance2 C

LOGIC INPUTS AND OUTPUT

Logic Input Low Voltage VIL 0.8 V max
Logic Input High Voltage VIH 2.4 V min
Input Leakage Current IIL 10 µA max
Input Capacitance2 C

INTERFACE TIMING

2, 4

Clock Input Frequency f
Clock Width High tCH 10 ns min
Clock Width Low tCL 10 ns min
CS to Clock Setup
Clock to CS Hold
Data Setup tDS 5 ns min
Data Hold tDH 10 ns min
LDAC Setup

Hold

LDAC Width

SUPPLY CHARACTERISTICS

Power Supply Range V
Positive Supply Current IDD Logic Inputs = 0 V 10 µA max
Power Dissipation P
Power Supply Sensitivity PSS ∆VDD = ±5% 0.006 %/% max

= Virtual GND, GND = 0 V, V

OUT

Data = 0x0000, TA = 25°C 10 nA max

OUT

Data = 0x0000, TA = TA Max 20 nA max

OUT

Data = Full Scale ±1/±4 mV typ/max

FSE

–12/+12 V min/V max

REF

5 kΩ typ3

REF

5 pF typ

REF

Data = Full Scale 2 mA typ

OUT

Code Dependent 200 pF typ

OUT

10 pF max

IL

50 MHz

CLK

0 ns min

t

CSS

10 ns min

t

CSH

5 ns min

t

LDS

10 ns min

t

LDH

10 ns min

t

LDAC

Range 4.5/5.5 V min/V max

DD

Logic Inputs = 0 V 0.055 mW max

DISS

= 10 V, TA = Full Operating Tempearture Range,

REF

/216 = 153 µV when V

REF

/214 = 610 µV when V

REF

= 10 V 16 Bits

REF

= 10 V 14 Bits

REF

1

All static performance tests (except I

is tied to the amplifier output. Typical values represent average readings measured at 25°C.

2

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

3

All ac characteristic tests are performed in a closed-loop system using an O42 I-to-V converter amplifier.

4

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.

) are performed in a closed-loop system using an external precision OP1177 I-to-V converter amplifier. The AD5545 RFB terminal

OUT

Rev. 0 | Page 3 of 16

AD5545/AD5555

Parameter Symbol Conditions 5 V ± 10% Units

AC CHARACTERISTICS

Output Voltage Setting Time

t

S

Reference Multiplying BW BW V
DAC Glitch Impulse

Feedthrough Error

Digital Feedthrough

Q

V

OUT/VREF

Q
Total Harmonic Distortion THD V
Analog Crosstalk

C

TA

Output Spot Noise Voltage eN f = 1 kHz, BW = 1 Hz 12 nV/√Hz

To ±0.1% Full Scale, Data = Zero Scale to
Full Scale to Zero Scale

= 5 V p-p, Data = Full Scale 4 MHz typ

REF

= 0 V, Data = Zero Scale to Midscale to Zero

V

REF

Scale
Data = Zero Scale, V

f = 1 kHz, Same Channel
CS

= Logic High and f

= 5 V p-p, Data = Full Scale, f = 1 kHz to 10 kHz –85 dB typ

REF

V

= 0 V, Measure V

REFB

= 100 mV rms,

REF

= 1 MHz

CLK

with V

OUTB

Wave, Data = Full Scale, f = 1 kHz to 10 kHz

= 5 V p-p Sine

REFA

0.5 µs typ

7 nV-s typ

–65 dB

7 nV-s typ

–95 dB typ

Rev. 0 | Page 4 of 16

AD5545/AD5555

ABSOLUTE MAXIMUM RATINGS

Table 2. AD5545/AD5555 Absolute Maximum Ratings

Parameter Rating

VDD to GND –0.3 V, +8 V
V

to GND –18 V, +18 V

REF

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
Package Power Dissipation

Thermal Resistance θJA

16-Lead TSSOP 150°C/W
Maximum Junction Temperature (TJ max) 150°C
Operating Temperature Range –40°C to +85°C
Storage Temperature Range –65°C to +150°C
Lead Temperature

RU-16 (Vapor Phase, 60 sec) 215°C

RU-16 (Infrared, 15 sec) 220°C

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

max – TA)/ θJA

(T

J

Rev. 0 | Page 5 of 16