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Ultralow Noise, High Accuracy
Voltage References
Data Sheet
ADR4520/ADR4525/ADR4530/ADR4533/ADR4540/ADR4550
Rev. 0
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 ©2012 Analog Devices, Inc. All rights reserved.
FEATURES
Maximum temperature coefficient (TCV
OUT
): 2 ppm/°C
Output noise (0.1 Hz to 10 Hz)
Less than 1 μV p-p at V
OUT
of 2.048 V typical
Initial output voltage error: ±0.02% (maximum)
Input voltage range: 3 V to 15 V
Operating temperature: −40°C to +125°C
Output current: +10 mA source/−10 mA sink
Low quiescent current: 950 μA (maximum)
Low dropout voltage: 300 mV at 2 mA (V
OUT
≥ 3 V)
8-lead SOIC package
APPLICATIONS
Precision data acquisition systems
High resolution data converters
High precision measurement devices
Industrial instrumentation
Medical devices
Automotive battery monitoring
PIN CONFIGURATION
Figure 1. 8-Lead SOIC
GENERAL DESCRIPTION
The ADR4520/ADR4525/ADR4530/ADR4533/ADR4540/
ADR4550 devices are high precision, low power, low noise
voltage references featuring ±0.02% maximum initial error,
excellent temperature stability, and low output noise.
This family of voltage references uses an innovative core
topology to achieve high accuracy while offering industry-leading
temperature stability and noise performance. The low, thermally
induced output voltage hysteresis and low long-term output
voltage drift of the devices also improve system accuracy over
time and temperature variations.
A maximum operating current of 950 μA and a maximum low
dropout voltage of 300 mV allow the devices to function very
well in portable equipment.
The ADR4520/ADR4525/ADR4530/ADR4533/ADR4540/
ADR4550 series of references is provided in an 8-lead SOIC
package and is available in a wide range of output voltages, all of
which are specified over the extended industrial temperature
range of −40°C to +125°C.
Table 1. Selection Guide
Model Output Voltage (V)
ADR4520 2.048
ADR4525 2.5
ADR4530 3.0
ADR4533 3.3
ADR4540 4.096
ADR4550 5.0
Table 2. Voltage Reference Choices from Analog Devices
V
OUT
(V)
Low Cost/
Low Power Micropower
Ultralow
Noise
High Voltage,
High Performance
2.048 ADR360 REF191 ADR430
ADR3420 ADR440
2.5 ADR3425 ADR291 ADR431 ADR03
AD1582 REF192 ADR441 AD780
ADR361
5.0 ADR3450 ADR293 ADR435 ADR02
AD1585 REF195 ADR445 AD586
ADR365
NC
1
V
IN
2
NC
3
GND
4
TP
8
NC
7
V
OUT
6
NC
5
NOTES
1. NC = NO CONNECT.
2. TP = TEST PIN. DO NOT CONNECT.
ADR4520/ADR4525/
ADR4530/ADR4533/
ADR4540/ADR4550
TOP VIEW
(Not to Scale)
10203-001
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