High Precision
10 V Reference
AD587
FEATURES
FUNCTIONAL BLOCK DIAGRAM
Laser trimmed to high accuracy
10.000 V ±5 mV (L and U grades)
Trimmed temperature coefficient
5 ppm/°C max (L and U grades)
Noise reduction capability
Low quiescent current: 4 mA max
Output trim capability
MIL-STD-883-compliant versions available
+VIN
NOISE
REDUCTION
2
8
RS
A1
6 VOUT
RF
RT
5 TRIM
RI
AD587
GND
NOTE
PINS 1, 3, AND 7 ARE INTERNAL TEST POINTS.
NO CONNECTIONS TO THESE POINTS.
00530-001
4
Figure 1.
GENERAL DESCRIPTION
PRODUCT HIGHLIGHTS
The AD587 represents a major advance in state-of-the-art
monolithic voltage references. Using a proprietary ionimplanted buried Zener diode and laser wafer trimming of high
stability thin-film resistors, the AD587 provides outstanding
performance at low cost.
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
AD587L has a maximum deviation from 10.000 V of
±8.5 mV between 0°C and 70°C, and the AD587U guarantees ±14 mV maximum total error between −55°C and
+125°C.
2.
Optional Fine Trim Connection.
This connection is designed for applications requiring
higher precision.
3.
Instant Upgrade of Any System Using an IndustryStandard Pinout 10 V Reference.
4.
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.
5.
MIL-STD-883 Compliant Versions Available.
Refer to the Analog Devices Military Products Databook
or the current AD587/883B Data Sheet for detailed
specifications.
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 and, in general, can offer better performance than the
standard on-chip references.
The AD587J, AD587K, and AD587L are specified for operation
from 0°C to 70°C, and the AD587U is specified for −55°C to
+125°C operation. All grades are available in 8-lead CERDIP.
The J and K versions are also available in an 8-lead SOIC
package for surface-mount applications, while the J, K, and L
grades also come in an 8-lead PDIP.
Rev. G
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