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AD7399BRZ

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24
Quad, Serial-Input
12-Bit/10-Bit DACs
AD7398/AD7399
Rev. C
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.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 www.analog.com
Fax: 781.461.3113 ©2000–2011 Analog Devices, Inc. All rights reserved.
FEATURES
AD7398—12-bit resolution
AD7399—10-bit resolution
Programmable power shutdown
Single (3 V to 5 V) or dual (±5 V) supply operation
3-wire, serial SPI®-compatible interface
Internal power-on reset
Double buffered registers for simultaneous
multichannel DAC update
Four separate rail-to-rail reference inputs
Thin profile, TSSOP-16 package available
Low tempco: 1.5 ppm/°C
Qualified for automotive applications
APPLICATIONS
Automotive output voltage span
Portable communications
Digitally controlled calibration
PC peripherals
FUNCTIONAL BLOCK DIAGRAM
DAC A
DAC A
REGISTER
INPUT
REG A
DAC B
REGISTER
INPUT
REG B
DAC C
REGISTER
INPUT
REG C
DAC D
REGISTER
INPUT
REG D
SERIAL
REGISTER
POWER
ON RESET
DAC D
DAC C
DAC B
12/10
CLK
V
OUT
A
V
OUT
B
V
OUT
C
V
OUT
D
SDI
V
SS
RS LDAC V
REF
C V
REF
D
GND
CS
V
DD
V
REF
B
V
REF
A
AD7398/AD7399
02179-001
Figure 1.
GENERAL DESCRIPTION
The AD7398/AD7399 family of quad, 12-bit/10-bit, voltage
output digital-to-analog converters (DACs) is designed to
operate from a single 3 V to 5 V supply or a dual ±5 V supply.
Built with the Analog Devices, Inc. robust CBCMOS process,
these monolithic DACs offer the user low cost with ease-of-use
in single or dual-supply systems.
The applied external reference, V
REF
, determines the full-scale
output voltage. Valid V
REF
values include V
SS
< V
REF
< V
DD
that
result in a wide selection of full-scale outputs. For multiplying
applications, ac inputs can be as large as ±5 V
P
.
A doubled-buffered serial-data interface offers high speed, 3-wire,
SPI- and microcontroller-compatible inputs using serial data-in
(SDI), clock (CLK), and a chip-select (
CS
). A common level-
sensitive, load-DAC strobe (
LDAC
) input allows simultaneous
update of all DAC outputs from previously loaded input registers.
Additionally, an internal power-on reset forces the output voltage to
zero at system turn on. An external asynchronous reset (
RS
) also
forces all registers to the zero code state. A programmable power-
shutdown feature reduces power dissipation on unused DACs.
Both parts are offered in the same pinout, enabling users to
select the appropriate resolution for their application without
redesigning the layout. For 8-bit resolution applications, see the
pin-compatible AD7304 product.
The AD7398/AD7399 are specified over the extended industrial
(−40°C to +125°C) temperature range. Parts are available in
16-lead, wide body SOIC and ultracompact, thin, 1.1 mm
TSSOP packages.
0.5
–0.5
–0.4
–0.3
–0.2
–0.1
0
0.
1
0.2
0.3
0.4
0 4096358430722560204815361024512
DNL (LSB)
CODE (Decimal)
02179-002
V
DD
= +5V
V
SS
= –5V
V
REF
= +2.5V
T
A
= 25°C
Figure 2. AD7398 DNL vs. Code (T
A
= 25°C)
AD7398/AD7399
Rev. C | Page 2 of 24
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
Functional Block Diagram .............................................................. 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications ..................................................................................... 3
AD7398 12-Bit Voltage Output DAC ........................................ 3
AD7399 10-Bit Voltage Output DAC ........................................ 4
Timing Diagrams .......................................................................... 5
Absolute Maximum Ratings ............................................................ 6
ESD Caution .................................................................................. 6
Pin Configuration And Function Descriptions ............................ 7
Input Registers .................................................................................. 8
AD7398 Serial Input Register Data Format .............................. 8
AD7399 Serial Input Register Data Format .............................. 8
Terminology ...................................................................................... 9
Typical Performance Characteristics ........................................... 10
Theory of Operation ...................................................................... 14
DAC Operation .......................................................................... 14
Operation with V
REF
Equal to the Supply ................................ 15
Power Supply Sequencing ......................................................... 15
Programmable Power Shutdown .............................................. 15
Worst Case Accuracy ................................................................. 15
Serial Data Interface ................................................................... 15
Power-On Reset .......................................................................... 16
Microprocessor Interfacing ....................................................... 16
Applications Information .............................................................. 18
Staircase Windows Comparator ............................................... 18
Programmable DAC Reference Voltage .................................. 19
Outline Dimensions ....................................................................... 20
Ordering Guide .......................................................................... 21
REVISION HISTORY
1/11—Rev. B to Rev. C
Added Automotive Model and Information .............. Throughout
12/09—Rev. A to Rev. B
C
hanges to Ordering Guide .......................................................... 21
6/06—Rev. 0 to Rev. A
Updated Format .................................................................. Universal
Changes to Table 1 ............................................................................ 3
Changes to Table 2 ............................................................................ 4
Changes to Ordering Guide .......................................................... 21
11/00—Revision 0: Initial Version
AD7398/AD7399
Rev. C | Page 3 of 24
SPECIFICATIONS
AD7398 12-BIT VOLTAGE OUTPUT DAC
V
DD
= 5 V, V
SS
= 0 V; or V
DD
= + 5 V, V
SS
= −5 V, V
REF
= +2.5 V, −40°C < T
A
< +125°C, unless otherwise noted.
Table 1.
Parameter Symbol Condition 3 V to 5 V ± 10% ±5 V ± 10% Unit
STATIC PERFORMANCE
Resolution
1
N 12 12 Bits
Relative Accuracy
2
INL ±1.5 ±1.5 LSB max
Differential Nonlinearity
2
DNL Monotonic ±1 ±1 LSB max
Zero-Scale Error V
ZSE
Data = 000
H
7 ±2.5 mV max
Full-Scale Voltage Error V
FSE
Data = FFF
H
±2.5 ±2.5 mV max
Full-Scale Tempco
3
TCV
FS
1.5 1.5 ppm/°C typ
REFERENCE INPUT
V
REF
IN Range
4
V
REF
0/V
DD
V
SS
/V
DD
V min/max
Input Resistance
5
R
REF
Data = 555
H
, worst case 35 35 kΩ typ
6
Input Capacitance
3
C
REF
5 5 pF typ
ANALOG OUTPUT
Output Voltage Range V
OUT
0 to V
REF
0 to V
REF
V
Output Current I
OUT
Data = 800
H
, ΔV
OUT
= 4 LSBs ±5 ±5 mA typ
Capacitive Load
3
C
L
No oscillation 200 400 pF max
LOGIC INPUTS
Logic Input Low Voltage V
IL
V
DD
= 3 V 0.5 V max
V
DD
= 5 V 0.8 0.8 V max
Logic Input High Voltage V
IH
CLK only 80% V
DD
4.0 V min
2.1 to 2.4 2.4 V min
Input Leakage Current I
IL
1 1 μA max
Input Capacitance
3
C
IL
10 10 pF max
INTERFACE TIMING
3, 7
Clock Frequency f
CLK
11 16.6 MHz max
Clock Width High t
CH
45 30 ns min
Clock Width Low t
CL
45 30 ns min
CS to Clock Setup
t
CSS
10 5 ns min
Clock to CS Hold
t
CSH
20 15 ns min
Load DAC Pulse Width t
LDAC
45 30 ns min
Data Setup t
DS
15 10 ns min
Data Hold t
DH
10 5 ns min
Load Setup to CS
t
LDS
0 0 ns min
Load Hold to CS
t
LDH
20 15 ns min
AC CHARACTERISTICS
Output Slew Rate SR Data = 000
H
to FFF
H
to 000
H
2 2 V/μs typ
Settling Time
8
t
S
To ±0.1% of full scale 6 6 μs typ
Shutdown Recovery t
SDR
6 6 μs typ
DAC Glitch Q Code 7FF
H
to 800
H
to 7FF
H
150 150 nVs typ
Digital Feedthrough Q
DF
15 15 nVs typ
Feedthrough V
OUT
/V
REF
V
REF
= 1.5 V
DC
1 V p-p, data = 000
H
,
f = 100 kHz
−63 −63 dB typ
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24

AD7399BRZ

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Manufacturer:
Analog Devices Inc.
Description:
Digital to Analog Converters - DAC Quad Serial-Input 10-Bit
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