Analog Devices AD5399 d Datasheet

Twos Complement, Dual 12-Bit DAC

with Internal REF and Fast Settling Time

FEATURES

2-channel 12-bit DAC
Twos complement facilitates bipolar applications
Bipolar zero with 2 V dc offset
Built-in 2.000 V precision reference with 10 ppm/°C typ TC
Buffered voltage output: 0 V to 4 V
Single-supply operation: 4.5 V to 5.5 V
Fast 0.8 µs settling time typ
Ultracompact MSOP-10 package
Monotonic DNL < ±1 LSB
Optimized accuracy at zero scale
Power-on reset to V
3-wire serial data input
Extended temperature range: –40°C to +105°C

APPLICATIONS

Single-supply bipolar converter operations
General-purpose DSP applications
Digital gain and offset controls
Instrumentation level settings
Disk drive control
Precision motor control

GENERAL DESCRIPTION

The AD5399 is the industry-first dual 12-bit digital-to-analog
converter that accepts twos complement digital coding with 2 V
dc offset for single-supply operation. Augmented with a built-in
precision reference and a solid buffer amplifier, the AD5399 is
the smallest self-contained 12-bit precision DAC that fits many
general-purpose as well as DSP specific applications. The twos
complement programming facilitates the natural coding
implementation commonly found in DSP applications, and
allows operation in single supply. The AD5399 provides a 2 V
reference output, V
be used for other on-board components that require a precision
reference. The device is specified for operation from 5 V ± 10%
single supply with bipolar output swing from 0 V to 4 V
centered at 2 V.

REF

, for bipolar zero monitoring. It can also

REF

AD5399

FUNCTIONAL BLOCK DIAGRAM

V

TP

V

AGND

CS

CLK

SDI

DGND

DD

V

2V

REF

DECODER SW

DRIVER A

12

A0

16-BIT

DAC A

REGISTER

ADDR

DECODE

EN

D15...D0

AD5399

X2×2

DECODER SW

DRIVER B

DAC B

REGISTER

12

POWER-ON

RESET

Figure 1.

V

= ((D – 2048)/4096 × 4 V) + 2 V for 0 ≤ D ≤ 4095, where D

OUT

is the decimal code.

Table 1. Examples of Twos Complement Codes

Twos Complement D Scale V

2047 4095 +FS 4.000
2046 4094 +FS – 1 LSB 3.999
1 2049 BZS + 1 LSB 2.001
0 2048 BZS 2.000
4095 2047 BZS – 1 LSB 1.999
2049 1 –FS + 1 LSB 0.001
2048 0 –FS 0.000

FS = Full Scale, BZS = Bipolar Zero Scale.

4.0

3.5

(V)

V

OUT

3.0

2.5

2.0

1.5

V

= [(0 – 2048)/4096 × 4V] + 2V

OUT

VBZ(V

) = 2V

REF

VBZ + 2V = 4V

V

OUTA

V

– 2V = 0V

V

OUTB

BZ

OUT

(V)

03469-B-001

×2

12

The AD5399 is available in the compact 1.1 mm low profile
MSOP-10 package. All parts are guaranteed to operate over the
extended industrial temperature range of –40°C to +105°C.

Rev. D

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.

1.0

0.5

0

0 512 1024 1536 2048 2560 3072 3584 4096

TWOS COMPLEMENT CODE

Figure 2. Output vs. Twos Complement Code

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.

www.analog.com

03469-B-002

AD5399

TABLE OF CONTENTS

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

Electrical Characteristics ............................................................. 3

Absolute Maximum Ratings............................................................ 4

ESD Caution.................................................................................. 4

Pin Configuration and Function Descriptions............................. 5

Timing Characteristics..................................................................... 6

REVISION HISTORY

6/04—Data sheet changed from Rev. C to Rev. D

Correction to Table 7 Caption ...................................................... 11

3/04—Data sheet changed from Rev. B to Rev. C

Changes to Specifications................................................................ 3

Changes to Table 4............................................................................ 5

Replaced Figures 4 and 5 ................................................................. 6

Changes to Operation Section ...................................................... 10

Changes to Table 6.......................................................................... 10

Typical Performance Characteristics..............................................7

Operation......................................................................................... 10

Power-Up/Power-Down Sequence .......................................... 10

Outline Dimensions....................................................................... 12

Ordering Guide .......................................................................... 12

11/03—Data sheet changed from Rev. A to Rev. B

Changes to Table 5 notes ................................................................. 5

Changes to Figures 8 and 9.............................................................. 7

Changes to Figure 12........................................................................ 8

Added Power-Up/Power-Down section...................................... 10

3/03—Data sheet changed from Rev. 0 to Rev. A

Change to Table 1 ............................................................................. 1

2/03—Revision 0: Initial Version

Rev. D | Page 2 of 12

AD5399

SPECIFICATIONS

ELECTRICAL CHARACTERISTICS

VDD = 5 V ± 10%, –40°C < TA < +105°C, unless otherwise noted.

Table 2.

Parameter Symbol Conditions Min Typ1 Max Unit

DC CHARACTERISTICS

Resolution N 12 Bits
Differential Nonlinearity Error DNL –1 ±0.5 +1 LSB

Codes 2048 to 2052, due to int. op amp offset –1.2 ±0.5 +1.2 LSB

Integral Nonlinearity Error INL –0.4 ±0.02 +0.4 %FS
Positive Full-Scale Error V
Bipolar Zero-Scale Error V
Negative Full-Scale Error V

ANALOG OUTPUTS

Nominal Positive Full-Scale V
Positive Full-Scale Tempco2 TCV

Code = 0xFF, TA = –40°C to +105°C –60 ±10 +60 ppm/°C

Nominal VBZ Output Voltage VBZ 1.995 2.000 2.004 V
Bipolar Zero Output Resistance2
VBZ Output Voltage Tempco TCVBZ T

T

Nominal Peak-to-Peak Output Swing |V

DIGITAL INPUTS

Input Logic High VIH V
Input Logic Low VIL V
Input Current IIL V
Input Capacitance2

POWER SUPPLIES

Power Supply Range V
Supply Current IDD V
Supply Current in Shutdown I

V

Power Dissipation3 P
Power Supply Sensitivity PSS ∆VDD = 5 V ± 10% –0.006 +0.003 +0.006 %/%

DYNAMIC CHARACTERISTICS2

Settling Time tS 0.1% error band 0.8 µs
Digital Feedthrough Q 10 nV-s
Bipolar Zero-Scale Glitch G 10 nV-s
Capacitive Load Driving Capability CL No oscillation 1000 pF

INTERFACE TIMING CHARACTERISTICS

2, 4

SCLK Cycle Frequency t
SCLK Clock Cycle Time t1 30 ns
Input Clock Pulse Width t2, t3 Clock level low or high 15 ns
Data Setup Time t4 5 ns
Data Hold Time t5 0 ns
CS

to SCLK Active Edge Setup Time
SCLK to CS Hold Time
Repeat Programming, CS High Time

1

Typical values represent average readings at 25°C and VDD = 5 V.

2

Guaranteed by design and not subject to production test.

3

P

is calculated from (IDD × VDD). CMOS logic level inputs result in minimum power dissipation.

DISS

4

See timing diagram (Figure 5) for location of measured values. All input control voltages are specified with tR = tF = 2 ns (10% to 90% of 3 V) and timed from a voltage

level of 1.5 V. Switching characteristics are measured using V

Code = 0xF –0.75 –0.15 +0.75 %FS

+FSE

Code = 0x000 –0.75 –0.15 +0.75 %FS

BZSE

Code = 0x800 –0.75 –0.15 +0.75 %FS

–FSE

Code = 0x7FF 4 V

OUTA/B

Code = 0x7FF, TA = 0°C to 70°C –40 ±10 +40 ppm/°C

OUTA/B

R

BZ

| + |V

+FS

C

5 pF

IL

DD RANGE

DD_SHDN

V

DISS

1 Ω

= 0°C to 70°C –40 ±10 +40 ppm/°C

A

= –40°C to +105°C –60 ±10 +60 ppm/°C

A

| Code 0x7FF to Code 0x800 4 V

–FS

= 5 V 2.4 V

DD

= 5 V 0.8 V

DD

= 0 V or 5 V, VDD = 5 V ±1 µA

IN

4.5 5.5 V
= VDD or VIL = 0 V 1.8 2.6 mA

IH

V

= VDD or VIL = 0 V, B14 = 0, TA = 0°C to 105°C 10 100 µA

IH

= VDD or VIL = 0 V, B14 = 0, TA = –40°C to 0°C 100 500 µA

IH

= VDD or VIL = 0 V, VDD = 5.5 V 9 13 mW

IH

33 MHz

CYC

5 ns

t

6

0 ns

t

7

30 ns

t

8

= 5 V. Input logic should have a 1 V/µs minimum slew rate.

DD

Rev. D | Page 3 of 12

AD5399

ABSOLUTE MAXIMUM RATINGS

TA = 25°C, unless otherwise noted.

Table 3.

Parameter Rating

VDD to GND –0.3 V, +7.5 V
V

, V

OUTA

Digital Input Voltages to GND 0 V, VDD + 0.3 V
Operating Temperature Range –40°C to +105°C
Maximum Junction Temperature (TJ
Storage Temperature –65°C to +150°C
Lead Temperature (Soldering, 10 sec) 300°C
Package Power Dissipation (T
Thermal Resistance, θJA, MSOP-10 206°C/W

, VBZ to GND 0 V, VDD

OUTB

) 150°C

MAX

J MAX

– TA)/θJA

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.

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 indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.

Rev. D | Page 4 of 12