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ADR433A

更新时间： 2024-11-11 22:04:15
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Ultralow Noise XFET Voltage References with Current Sink and Source Capability

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Ultralow Noise XFET® Voltage References  
with Current Sink and Source Capability  
ADR430/ADR431/ADR433/ADR434/ADR435/ADR439  
PIN CONFIGURATIONS  
FEATURES  
Low noise (0.1 Hz to 10 Hz): 3.5 µV p-p @ 2.5 V output  
No external capacitor required  
Low temperature coefficient  
A Grade: 10 ppm/°C max  
TP  
1
2
3
4
8
7
6
5
TP  
ADR43x  
TOP VIEW  
(Not to Scale)  
V
IN  
NC  
NC  
V
OUT  
GND  
TRIM  
B Grade: 3 ppm/°C max  
NC = NO CONNECT  
Load regulation: 15 ppm/mA  
Line regulation: 20 ppm/V  
Wide operating range  
Figure 1. 8-Lead MSOP  
(RM Suffix)  
ADR430: 4.1 V to 18 V  
ADR431: 4.5 V to 18 V  
ADR433: 5.0 V to 18 V  
ADR434: 6.1 V to 18 V  
ADR435: 7.0 V to 18 V  
TP  
1
2
3
4
8
7
6
5
TP  
NC  
V
ADR43x  
TOP VIEW  
(Not to Scale)  
V
IN  
NC  
OUT  
GND  
TRIM  
ADR439: 6.5 V to 18 V  
NC = NO CONNECT  
High output current: +30 mA/−20 mA  
Wide temperature range: −40°C to +125°C  
Figure 2. 8-Lead SOIC  
(R Suffix)  
APPLICATIONS  
Precision data acquisition systems  
High resolution data converters  
Medical instruments  
Industrial process control systems  
Optical control circuits  
Precision instruments  
GENERAL DESCRIPTION  
The ADR43x series is a family of XFET voltage references  
featuring low noise, high accuracy, and low temperature drift  
performance. Using ADI’s patented temperature drift curvature  
correction and XFET (eXtra implanted junction FET) technology,  
the ADR43x’s voltage change versus temperature nonlinearity is  
minimized.  
All versions are specified over the extended industrial tempera-  
ture range (−40°C to +125°C).  
Table 1. Selection Guide  
Accuracy  
VOUT (V) (mV)  
Temperature Coefficient  
(ppm/°C)  
Model  
ADR430B  
ADR430A  
ADR43±B  
ADR43±A  
ADR433B  
ADR433A  
ADR434B  
ADR434A  
ADR435B  
ADR435A  
ADR439B  
ADR439A  
2.048  
2.048  
2.500  
2.500  
3.000  
3.000  
4.096  
4.096  
5.000  
5.000  
4.500  
4.500  
±±  
±3  
±±  
±3  
±±.4  
±4  
±±.5  
±5  
±2  
±6  
3
±0  
3
±0  
3
±0  
3
±0  
3
±0  
3
The XFET references operate at lower current (800 µA) and  
supply headroom (2 V) than buried-Zener references. Buried-  
Zener references require more than 5 V headroom for operations.  
The ADR43x XFET references are the only low noise solutions  
for 5 V systems.  
The ADR43x series has the capability to source up to 30 mA  
and sink up to 20 mA of output current. It also comes with a  
TRIM terminal to adjust the output voltage over a 0.5% range  
without compromising performance. The ADR43x is available  
in the 8-lead mini SOIC and 8-lead SOIC packages.  
±2  
±5.4  
±0  
Rev. B  
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  
Fax: 781.326.8703  
www.analog.com  
© 2004 Analog Devices, Inc. All rights reserved.  
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