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AD588BQ Fiches technique(PDF) 1 Page - Analog Devices

No de pièce AD588BQ
Description  High Precision Voltage Reference
Download  12 Pages
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Fabricant  AD [Analog Devices]
Site Internet  http://www.analog.com
Logo AD - Analog Devices

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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. 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 companies.
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
© 2003, Analog Devices, Inc. All rights reserved.
AD588*
High Precision Voltage Reference
FEATURES
Low Drift: 1.5 ppm/ C
Low Initial Error: 1 mV
Pin Programmable Output:
+10 V, +5 V, +65 V Tracking, –5 V, –10 V
Flexible Output Force and Sense Terminals
High Impedance Ground Sense
Machine lnsertable DIP Packaging
MIL-STD-883 Compliant Versions Available
FUNCTIONAL BLOCK DIAGRAM
R3
RB
R1
R2
R4
R5
R6
GAIN
ADJ
GND
SENSE
+IN
GND
SENSE
–IN
VLOW BAL
ADJ
VCT A4 IN
–VS
+VS
A4 OUT
FORCE
A4 OUT
SENSE
A3 OUT
FORCE
A3 OUT
SENSE
A3 IN
VHIGH
NOISE
REDUCTION
A1
A4
AD588
A3
A2
GENERAL DESCRIPTION
The AD588 represents a major advance in the state-of-the-art
in monolithic voltage references. Low initial error and low tem-
perature drift give the AD588 absolute accuracy performance
previously not available in monolithic form. The AD588 uses a
proprietary ion-implanted buried Zener diode, and laser-wafer-
drift trimming of high stability thin-film resistors to provide
outstanding performance at low cost.
The AD588 includes the basic reference cell and three additional
amplifiers that provide pin programmable output ranges. The
amplifiers are laser-trimmed for low offset and low drift to main-
tain the accuracy of the reference. The amplifiers are configured
to allow Kelvin connections to the load and/or boosters for driv-
ing long lines or high current loads, delivering the full accuracy
of the AD588 where it is required in the application circuit.
The low initial error allows the AD588 to be used as a system
reference in precision measurement applications requiring 12-bit
absolute accuracy. In such systems, the AD588 can provide a
known voltage for system calibration in software, and the low
drift allows compensation for the drift of other components in
a system. Manual system calibration and the cost of periodic
recalibration can therefore be eliminated. Furthermore, the
mechanical instability of a trimming potentiometer and the
potential for improper calibration can be eliminated by using
the AD588 in conjunction with autocalibration software.
The AD588 is available in four versions. The AD588JQ and
AD588KQ and grades are packaged in a 16-lead CERDIP and
are specified for 0
°C to 70°C operation. AD588AQ and BQ
grades are packaged in a 16-lead CERDIP and are specified for
the –25
°C to +85°C industrial temperature range.
*Protected by Patent Number 4,644,253.
PRODUCT HIGHLIGHTS
1. The AD588 offers 12-bit absolute accuracy without any user
adjustments. Optional fine-trim connections are provided for
applications requiring higher precision. The fine trimming does
not alter the operating conditions of the Zener or the buffer
amplifiers, and thus does not increase the temperature drift.
2. Output noise of the AD588 is very low—typically 6
µV p-p.
A pin is provided for additional noise filtering using an exter-
nal capacitor.
3. A precision
±5 V tracking mode with Kelvin output connec-
tions is available with no external components. Tracking error
is less than 1 mV and a fine-trim is available for applications
requiring exact symmetry between the +5 V and –5 V outputs.
4. Pin strapping capability allows configuration of a wide vari-
ety of outputs:
± 5 V, +5 V, +10 V, –5 V, and –10 V dual
outputs or +5 V, –5 V, +10 V, and –10 V single outputs.


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