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Ultralow Noise, High Accuracy
Voltage References
Data Sheet
FEATURES
ADR4520/ADR4525/ADR4530/ADR4533/ADR4540/ADR4550
PIN CONFIGURATION
Maximum temperature coefficient (TCV OUT ): 2 ppm/°C
Output noise (0.1 Hz to 10 Hz)
ADR4520/ADR4525/
ADR4530/ADR4533/
ADR4540/ADR4550
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
NC 1
V IN 2
NC 3
TOP VIEW
8
7
6
TP
NC
V OUT
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
GENERAL DESCRIPTION
GND 4 (Not to Scale) 5 NC
NOTES
1. NC = NO CONNECT.
2. TP = TEST PIN. DO NOT CONNECT.
Figure 1. 8-Lead SOIC
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
Table 1. Selection Guide
Model
ADR4520
ADR4525
ADR4530
ADR4533
ADR4540
ADR4550
Output Voltage (V)
2.048
2.5
3.0
3.3
4.096
5.0
time and temperature variations.
Table 2. Voltage Reference Choices from Analog Devices
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.
V OUT (V)
2.048
2.5
5.0
Low Cost/
Low Power
Micropower
Ultralow
Noise
High Voltage,
High Performance
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.
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