REV. A
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a
AD7392/AD7393
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700 World Wide Web Site: http://www.analog.com
Fax: 781/326-8703 © Analog Devices, Inc., 1999
+3 V, Parallel Input
Micropower 10- and 12-Bit DACs
FUNCTIONAL BLOCK DIAGRAM
12
12
12-BIT
DAC
DAC REGISTER
V
REF
SHDN
AGND
RSDB0–DB11CSDGND
AD7392
V
DD
V
OUT
FEATURES
Micropower: 100 mA
0.1 mA Typical Power Shutdown
Single-Supply +2.7 V to +5.5 V Operation
Compact 1.1 mm Height TSSOP-20 Package
AD7392/12-Bit Resolution
AD7393/10-Bit Resolution
0.9 LSB Differential Nonlinearity Error
APPLICATIONS
Automotive 0.5 V to 4.5 V Output Span Voltage
Portable Communications
Digitally Controlled Calibration
PC Peripherals
GENERAL DESCRIPTION
The AD7392/AD7393 family of 10- and 12-bit voltage-output
digital-to-analog converters is designed to operate from a single
+3 V supply. Built using a CBCMOS process, these monolithic
DACs offer the user low cost and ease of use in single-supply
+3 V systems. Operation is guaranteed over the supply voltage
range of +2.7 V to +5.5 V, making this device ideal for battery
operated applications.
The full-scale voltage output is determined by the external
reference input voltage applied. The rail-to-rail REF
IN
to
DAC
OUT
allows for a full-scale voltage set equal to the positive
supply V
DD
or any value in between. The voltage outputs are
capable of sourcing 5 mA.
A 12-bit wide data latch loads with a 45 ns write time allowing
interface to the fastest processors without wait states.
Additionally, an asynchronous RS input sets the output to zero
scale at power on or upon user demand.
Both parts are offered in the same pinout to allow users to select
the amount of resolution appropriate for their applications
without circuit card changes.
The AD7392/AD7393 are specified for operation over the ex-
tended industrial (–40 C to +85 C) temperature range. The
AD7393AR is specified for the –40 C to +125 C automotive
temperature range. AD7392/AD7393s are available in plastic
DIP, and 20-lead SOIC packages. The AD7393ARU is avail-
able for ultracompact applications in a thin 1.1 mm height
TSSOP-20 package.
For serial data input, 8-lead packaged versions, see the AD7390
and AD7391 products.
CODE – Decimal
1
21
0.4
20.2
20.4
20.6
20.8
0.2
0
0.8
0.6
0 4096512
DNL – LSB
1024 1536 2048 2560 3072 3584
AD7392
V
DD
= +2.7V
V
REF
= +2.5V
T
A
= 258C
Figure 1. AD7392 Differential Nonlinearity Error vs. Code
CODE – Decimal
1024128 256 384 512 640 768 8960
AD7393
V
DD
= +2.7V
V
REF
= +2.5V
T
A
= 258C
1
21
0.4
20.2
20.4
20.6
20.8
0.2
0
0.8
0.6
DNL – LSB
Figure 2. AD7393 Differential Nonlinearity Error vs. Code