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AD7391ARU Datasheet(PDF) 1 Page - Analog Devices

Part # AD7391ARU
Description  3 Volt Serial-Input Micropower 10-Bit & 12-Bit DACs
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD7391ARU Datasheet(HTML) 1 Page - Analog Devices

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FUNCTIONAL DIAGRAM
REF
12-BIT DAC
DAC REGISTER
SERIAL REGISTER
12
CLR
CLK
SDI
VDD
VOUT
GND
12
EN
LD
AD7390
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
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
a
+3 Volt Serial-Input
Micropower 10-Bit & 12-Bit DACs
FEATURES
Micropower—100
A
Single-Supply— 2.7 to
5.5 V Operation
Compact 1.75 mm Height SO-8 Package
& 1.1 mm Height TSSOP-8
AD7390—12-Bit Resolution
AD7391—10-Bit Resolution
SPI & QSPI Serial Interface Compatible with Schmitt
Trigger Inputs
APPLICATIONS
Automotive 0.5 V to 4.5 V Output Span Voltage
Portable Communications
Digitally Controlled Calibration
GENERAL DESCRIPTION
The AD7390/AD7391 family of 10-bit & 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 consuming less than 100
µA making
this device ideal for battery operated applications.
The full-scale voltage output is determined by the external ref-
erence input voltage applied. The rail-to-rail REFIN to DACOUT
allows for a full-scale voltage set equal to the positive supply
VDD or any value in between.
A doubled-buffered serial-data interface offers high speed,
three-wire, SPI and microcontroller compatible inputs using
data in (SDI), clock (CLK) and load strobe (LD) pins. Addi-
tionally, a CLR 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 application with-
out circuit card redesign.
The AD7390/AD7391 are specified over the extended industrial
( 40
°C to 85°C) temperature range. The AD7391AR is
specified for the
40
°C to 125°C automotive temperature
range. The AD7390/AD7391s are available in plastic DIP, and
low profile 1.75 mm height SO-8 surface mount packages. The
AD7391ARU is available for ultracompact applications in a thin
1.1 mm TSSOP-8 package.
CODE – Decimal
1.00
1.00
0
4096
512
1024
1536
2048
2560
3072
3584
0.75
0.00
0.25
0.50
0.75
0.50
0.25
AD7390
TA = 55 C, 25 C, 85 C
SUPERIMPOSED
VDD = +3.0V
Figure 1. Differential Nonlinearity Error vs. Code
AD7390
VDD = +3.0V
VREF = +2.5V
25 , 85 C
55
CODE – Decimal
0
4096
512
1024
1536
2048
2560
3072
2584
2.0
2.0
1.5
0.0
0.5
1.0
1.5
1.0
0.5
Figure 2. INL Error vs. Code & Temperature
AD7390/AD7391
© Analog Devices, Inc., 1996
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
Fax: 617/326-8703


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