High Precision 10 V Reference
AD587
FEATURES
Laser trimmed to high accuracy
10.000 V ± 5 mV (U grade)
Trimmed temperature coefficient
5 ppm/°C maximum (U grade)
Noise-reduction capability
Low quiescent current: 4 mA maximum
Output trim capability
MIL-STD-883-compliant versions available
FUNCTIONAL BLOCK DIAGRAM
+V
IN
2
R
S
A1
R
F
R
T
R
I
4
NOTE
PIN 1, PIN 3, AND PIN 7 ARE INTERNAL TEST
POINTS. NO CONNECTIONS TO THESE POINTS.
00530-001
NOISE
REDUCTION
8
6 V
OUT
5 TRIM
AD587
GND
Figure 1.
GENERAL DESCRIPTION
The AD587 represents a major advance in state-of-the-art
monolithic voltage references. Using a proprietary ion-
implanted buried Zener diode and laser wafer trimming of high
stability thin-film resistors, the AD587 provides outstanding
performance at low cost.
The AD587 offers much higher performance than most other
10 V references. Because the AD587 uses an industry-standard
pinout, many systems can be upgraded instantly with the AD587.
The buried Zener approach to reference design provides lower
noise and drift than band gap voltage references. The AD587
offers a noise-reduction pin that can be used to further reduce
the noise level generated by the buried Zener.
The AD587 is recommended for use as a reference for 8-bit,
10-bit, 12-bit, 14-bit, or 16-bit DACs that require an external
precision reference. The device is also ideal for successive
approximation or integrating ADCs with up to 14 bits of
accuracy. In general, it offers better performance than standard
on-chip references.
The AD587J and AD587K are specified for operation from 0°C
to 70°C, and the AD587U is specified for operation from −55°C
to +125°C. The AD587JQ and AD587UQ models are available
in 8-lead CERDIP. Other models are available in an 8-lead SOIC
package for surface-mount applications, or in an 8-lead PDIP.
PRODUCT HIGHLIGHTS
1.
Laser trimming of both initial accuracy and temperature
coefficients. This laser trimming results in very low errors
over temperature without the use of external components.
The AD587U guarantees ±14 mV maximum total error
between −55°C and +125°C.
Optional fine trim connection. This connection is designed
for applications requiring higher precision.
Instant upgrade of any system using an industry-standard
pinout 10 V reference.
Very low output noise. AD587 output noise is typically
4 μV p-p. A noise-reduction pin is provided for additional
noise filtering using an external capacitor.
MIL-STD-883-compliant versions available. Refer to the
Analog Devices
Military/Aerospace Reference Manual
for
detailed specifications.
2.
3.
4.
5.
Rev. H
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. Specifications subject to change without notice. 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 owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113 ©1998–2007 Analog Devices, Inc. All rights reserved.
AD587
TABLE OF CONTENTS
Features .............................................................................................. 1
Functional Block Diagram .............................................................. 1
General Description ......................................................................... 1
Product Highlights ........................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Absolute Maximum Ratings............................................................ 4
ESD Caution.................................................................................. 4
Pin Configuration and Function Descriptions............................. 5
Theory of Operation ........................................................................ 6
Applying the AD587 .................................................................... 6
Noise Performance and Reduction .............................................6
Turn-On Time ...............................................................................7
Dynamic Performance..................................................................7
Load Regulation ............................................................................8
Temperature Performance............................................................8
Negative Reference Voltage from an AD587 .............................9
Applications Information .............................................................. 10
Using the AD587 with Converters........................................... 10
Outline Dimensions ....................................................................... 11
Ordering Guide .......................................................................... 12
REVISION HISTORY
9/07—Rev. G to Rev. H
Deleted AD587L Grade ..................................................... Universal
Change to Product Highlights .........................................................1
Changes to the Negative Reference Voltage from an
AD587 Section ..............................................................................9
Changes to Figure 19.......................................................................10
Changes to Figure 21 and Figure 22..............................................10
Updated Outline Dimensions ........................................................11
Changes to Ordering Guide ...........................................................12
4/05—Rev. F to Rev. G
Updated Format.................................................................. Universal
Added Table 3.....................................................................................5
Updated Outline Dimensions ........................................................11
Changes to Ordering Guide ...........................................................13
7/04—Rev. E to Rev. F
Changes to Ordering Guide .............................................................3
7/03—Rev. D to Rev. E.
Deletion of S and T Grades ............................................... Universal
Edits to Ordering Guide ...................................................................2
Deletion of Die Specifications .........................................................3
Edits to Figure 3.................................................................................4
Updated Outline Dimensions..........................................................9
Rev. H | Page 2 of 12
AD587
SPECIFICATIONS
T
A
= 25°C, V
IN
= 15 V, unless otherwise noted.
Table 1.
Parameter
OUTPUT VOLTAGE
OUTPUT VOLTAGE DRIFT
1
0°C to 70°C
−55°C to +125°C
GAIN ADJUSTMENT
LINE REGULATION
1
13.5 V ≤ +V
IN
≤ 36 V
T
MIN
to T
MAX
LOAD REGULATION
1
Sourcing 0 mA < I
OUT
< 10 mA
T
MIN
to T
MAX
Sourcing −10 mA < I
OUT
< 0 mA
2
T
MIN
to T
MAX
QUIESCENT CURRENT
POWER DISSIPATION
OUTPUT NOISE
0.1 Hz to 10 Hz
Spectral Density, 100 Hz
LONG-TERM STABILITY
SHORT-CIRCUIT CURRENT-TO-GROUND
SHORT-CIRCUIT CURRENT-TO-+V
IN
TEMPERATURE RANGE
Specified Performance (J, K)
Operating Performance (J, K)
3
Specified Performance (U)
Operating Performance (U)
3
1
2
AD587J
Min
Typ Max
9.990
10.010
20
20
+3
−1
AD587K
Min
Typ Max
9.995
10.005
10
10
+3
−1
AD587U
Min
Typ Max
9.995
10.005
5
5
+3
−1
Unit
V
ppm/°C
ppm/°C
%
%
±100
±100
±100
μV/V
±100
±100
4
±100
±100
4
±100
±100
4
μV/mA
μV/mA
mA
mW
μV p-p
nV/√Hz
ppm/1000 hr
mA
mA
°C
°C
°C
°C
2
30
4
100
±15
30
30
0
−40
−55
−55
2
30
4
100
±15
30
30
0
−40
−55
−55
2
30
4
100
±15
30
30
0
−40
−55
−55
70
70
70
+85
+125
+125
70
70
70
+85
+125
+125
70
70
70
+85
+125
+125
Specification is guaranteed for all packages and grades. CERDIP-packaged parts are 100% production tested.
Load regulation (sinking) specification for SOIC (R-8) package is ±200 μV/mA.
3
The operating temperature range is defined as the temperature extremes at which the device will still function. Parts may deviate from their specified performance
outside their specified temperature range.
Rev. H | Page 3 of 12
AD587
ABSOLUTE MAXIMUM RATINGS
Table 2.
Parameter
+V
IN
to Ground
Power Dissipation (25°C)
Storage Temperature Range
Lead Temperature (Soldering, 10 sec)
Package Thermal Resistance
θ
JC
θ
JA
Output Protection
Short to Ground
Short to +V
IN
1
Rating
36 V
500 mW
−65°C to +150°C
300°C
22°C/W
110°C/W
Indefinite
1
Momentary
1
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.
ESD CAUTION
Period for which output is safe.
Rev. H | Page 4 of 12
AD587
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
TP*
1
+V
IN 2
8
NOISE
REDUCTION
TP*
V
OUT
TRIM
00530-002
TOP VIEW
TP*
3
(Not to Scale)
6
GND
4
5
AD587
7
*TP DENOTES FACTORY TEST POINT.
NO CONNECTIONS SHOULD BE MADE
TO THESE PINS.
Figure 2. Pin Configuration
Table 3. Pin Function Descriptions
Pin No.
1, 3, 7
2
4
5
6
8
Mnemonic
TP
+V
IN
GND
TRIM
V
OUT
NOISE REDUCTION
Description
No Connection. Leave floating.
Input Voltage.
Ground.
Fine Trimming of Output Voltage. See Figure 4.
Output Voltage.
Noise Reduction of Output Voltage. Reduces noise via external capacitor to ground.
Rev. H | Page 5 of 12
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