REV. F
AD587
High Precision
10 V Reference
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FEATURES
Laser Trimmed to High Accuracy:
10.000 V H11550 5 mV (L and U Grades)
Trimmed Temperature Coefficient:
5 ppm/H11543C Max (L and U Grades)
Noise Reduction Capability
Low Quiescent Current: 4 mA Max
Output Trim Capability
MIL-STD-883 Compliant Versions Available
FUNCTIONAL BLOCK DIAGRAM
82
6
4
5
R
T
R
F
R
I
R
S
AD587
A1
+V
IN
NOISE
REDUCTION
V
OUT
TRIM
GND
NOTE
PINS 1, 3, AND 7 ARE INTERNAL TEST POINTS.
NO CONNECTIONS TO THESE POINTS.
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-, 10-, 12-,
14-, or 16-bit DACs that require an external precision reference.
The device is also ideal for successive approximation or integrat-
ing 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.
PRODUCT HIGHLIGHTS
1. Laser trimming of both initial accuracy and temperature
coefficients 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. For applications requiring higher precision, an optional fine
trim connection is provided.
3. Any system using an industry-standard pinout 10 V reference
can be upgraded instantly with the AD587.
4. Output noise of the AD587 is very low, typically 4 µV p-p.
A noise reduction pin is provided for additional noise filtering
using an external capacitor.
5. The AD587 is available in versions compliant with
MIL-STD-883. Refer to the Analog Devices Military Products
Databook or the current AD587/883B Data Sheet for detailed
specifications.