AD588TQ Analog Devices, AD588TQ Datasheet

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AD588TQ

Manufacturer Part Number
AD588TQ
Description
High Precision Voltage Reference
Manufacturer
Analog Devices
Datasheet

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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.
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.
*Protected by Patent Number 4,644,253.
FEATURES
Low Drift: 1.5 ppm/ C
Low Initial Error: 1 mV
Pin Programmable Output:
High Impedance Ground Sense
Machine lnsertable DIP Packaging
MIL-STD-883 Compliant Versions Available
+10 V, +5 V, +65 V Tracking, –5 V, –10 V
Flexible Output Force and Sense Terminals
High Precision Voltage Reference
PRODUCT HIGHLIGHTS
1. The AD588 offers 12-bit absolute accuracy without any user
2. Output noise of the AD588 is very low—typically 6 µV p-p.
3. A precision ± 5 V tracking mode with Kelvin output connec-
4. Pin strapping capability allows configuration of a wide vari-
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
Fax: 781/326-8703
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.
A pin is provided for additional noise filtering using an exter-
nal capacitor.
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.
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.
GAIN
ADJ
R3
REDUCTION
R
SENSE
GND
B
+IN
R2
NOISE
FUNCTIONAL BLOCK DIAGRAM
A2
SENSE
GND
–IN
A1
R1
© 2003, Analog Devices, Inc. All rights reserved.
V
V
HIGH
LOW
R4
R5
BAL
ADJ
A3 IN
R6
V
CT
A3 OUT
SENSE
A4 IN
AD588
AD588
A3
A4
www.analog.com
A3 OUT
A4 OUT
A4 OUT
FORCE
FORCE
SENSE
+V
–V
*
S
S

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AD588TQ Summary of contents

Page 1

... 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. High Precision Voltage Reference ...

Page 2

AD588–SPECIFICATIONS Parameter OUTPUT VOLTAGE ERROR +10 V, –10 V Outputs +5 V, –5 V Outputs ± TRACKING MODE Symmetry Error OUTPUT VOLTAGE DRIFT 0°C to 70°C ( –25°C to +85°C ( GAIN ADJ AND ...

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... AD588JQ 3 AD588KQ 1 NOTES 1 For details on grade and package offerings screened in accordance with MIL-STD-883, refer to the Analog Devices Military Products Databook or current AD588/883B. 2 Temperature coefficient specified from 0°C to 70°C. CAUTION ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although the AD588 features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges ...

Page 4

AD588 THEORY OF OPERATION The AD588 consists of a buried Zener diode reference, amplifiers used to provide pin programmable output ranges, and associ- ated thin-film resistors as shown in Figure 1. The temperature compensation circuitry provides the device with a ...

Page 5

Connect Pin 10 Unbuffered* Output on Pins Range to Pin: –10 V – – – – *Unbuffered outputs should not ...

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AD588 0.1 F 0.1 F NOISE REDUCTION SYSTEM GROUND Figure 2c. –10 V Output Trimming the AD588 introduces no additional errors over temperature, so precision potentiometers are not required. For ...

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Zener diode’s current source, resulting in a somewhat longer turn-on time. In the case µF capacitor, the initial turn-on time is approximately 60 ms (see Figure 6). Note: If the NOISE REDUCTION ...

Page 8

AD588 110 100 +SUPPLY 80 60 –SUPPLY 100 1k 10k FREQUENCY – Hz Figure 11. Power Supply Rejection vs. Frequency (A3, A4) Figure 12a. Unity-Gain Follower Pulse Response (Large Signal) Figure 12b. Unity-Gain Follower Pulse Response ...

Page 9

Figure 15b. Large-Scale Transient Response Figures 16a and 16b display the output amplifier characteristics driving load, a common situation found when the reference is shared among multiple converters or is used to provide a ...

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AD588 Attempts to drive a large capacitive load (in excess of 1,000 pF) may result in ringing or oscillation, as shown in the step response photo (Figure 19a). This is due to the additional pole formed by the load capacitance ...

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AD588 V L Figure 21. High Accuracy ± Tracking Reference for AD569 REV REFS +10V V REFF A3 AGNDS AD588 AGNDF ...

Page 12

AD588 12-Bit Analog-to-Digital Converter—AD574A The AD574A is specified for gain drift from 10 ppm/° ppm/°C, (depending on grade) using its on-chip reference. The reference contributes typically 75% of this drift. Therefore, the total drift using an AD588 to ...

Page 13

AD588 A2 Figure 24. Precision Current Source for RTD BOOSTED PRECISION CURRENT SOURCE In the RTD current-source application, the load current is limited to ± the ...

Page 14

AD588 Additional common-mode voltage reduction is realized by using the circuit illustrated in Figure 28. A1, the ground sense ampli- fier, serves the supplies on the bridge to maintain a virtual ground at one center tap. The voltage that appears ...

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Ceramic DIP-Glass Hermetic Seal Package [CERDIP] 0.200 (5.08) MAX 0.200 (5.08) 0.125 (3.18) 0.023 (0.58) 0.014 (0.36) Revision History Location 2/03—Data Sheet changed from REV REV. D. Added KQ model and deleted SQ and TQ models . ...

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