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AD7391SR Datasheet(PDF) 1 Page - Analog Devices

Part No. AD7391SR
Description  3 V Serial-Input Micropower 10-Bit and 12-Bit DACs
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Maker  AD [Analog Devices]
Homepage  http://www.analog.com
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AD7391SR Datasheet(HTML) 1 Page - Analog Devices

 
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REV. A
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. No license is granted by implication or otherwise
under any patent or patent rights of Analog Devices.
a
AD7390/AD7391
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
www.analog.com
Fax: 781/326-8703
© Analog Devices, Inc., 2002
3 V Serial-Input
Micropower 10-Bit and 12-Bit DACs
FUNCTIONAL BLOCK DIAGRAM
EN
AD7390
DAC REGISTER
12-BIT DAC
12
12
SERIAL REGISTER
REF
VDD
CLR
LD
CLK
SDI
GND
VOUT
FEATURES
Micropower—100
A
Single-Supply—2.7 V to 5.5 V Operation
Compact 1.75 mm Height SO-8 Package
and 1.1 mm Height TSSOP-8 Package
AD7390—12-Bit Resolution
AD7391—10-Bit Resolution
SPI and 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 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 consuming less than 100
µA
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 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,
3-wire, SPI and microcontroller compatible inputs using data
in (SDI), clock (CLK) and load strobe (
LD) pins. Addition-
ally, 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 without
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
VDD = 3.0V
TA = 55 C, +25 C, +85 C
SUPERIMPOSED
Figure 1. Differential Nonlinearity Error vs. Code
AD7390
VDD = 3.0V
VREF = 2.5V
+25 C, +85 C
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
55 C
Figure 2. INL Error vs. Code and Temperature


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