Ultralow Noise, High Accuracy
Voltage References
ADR4520/ADR4525/ADR4530/ADR4533/ADR4540/ADR4550
Data Sheet
FEATURES
PIN CONFIGURATION
ADR4520/ADR4525/
ADR4530/ADR4533/
ADR4540/ADR4550
Maximum temperature coefficient (TCVOUT): 2 ppm/°C
Output noise (0.1 Hz to 10 Hz)
Less than 1 μV p-p at VOUT 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 (VOUT ≥ 3 V)
8-lead SOIC package
NC
1
2
3
4
8
7
6
5
TP
V
NC
IN
NC
V
OUT
TOP VIEW
(Not to Scale)
GND
NC
NOTES
1. NC = NO CONNECT.
2. TP = TEST PIN. DO NOT CONNECT.
Figure 1. 8-Lead SOIC
APPLICATIONS
Precision data acquisition systems
High resolution data converters
High precision measurement devices
Industrial instrumentation
Medical devices
Automotive battery monitoring
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.
Table 1. Selection Guide
Model
Output Voltage (V)
ADR4520
ADR4525
ADR4530
ADR4533
ADR4540
ADR4550
2.048
2.5
3.0
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.
3.3
4.096
5.0
Table 2. Voltage Reference Choices from Analog Devices
Low Cost/
VOUT (V) Low Power Micropower
Ultralow High Voltage,
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.
Noise
High Performance
2.048
ADR360
ADR3420
ADR3425
AD1582
ADR361
ADR3450
AD1585
ADR365
REF191
ADR430
ADR440
ADR431
ADR441
2.5
ADR291
REF192
ADR03
AD780
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.
5.0
ADR293
REF195
ADR435
ADR445
ADR02
AD586
Rev. 0
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