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ADR440_15

更新时间： 2022-02-26 10:58:53
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Ultralow Noise, LDO XFET Voltage References with Current Sink and Source

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ADR440_15 数据手册

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Ultralow Noise, LDO XFET Voltage  
References with Current Sink and Source  
ADR440/ADR441/ADR443/ADR444/ADR445  
FEATURES  
PIN CONFIGURATIONS  
Ultralow noise (0.1 Hz to 10 Hz)  
ADR440: 1 μV p-p  
ADR441: 1.2 μV p-p  
ADR443: 1.4 μV p-p  
ADR444: 1.8 μV p-p  
ADR445: 2.25 μV p-p  
Superb temperature coefficient  
A grade: 10 ppm/°C  
ADR440/  
TP  
1
2
3
4
8
7
6
5
TP  
ADR441/  
ADR443/  
ADR444/  
ADR445  
V
NC  
IN  
NC  
V
OUT  
TOP VIEW  
(Not to Scale)  
GND  
TRIM  
NOTES  
1. NC = NO CONNECT  
2. TP = TEST PIN (DO NOT CONNECT)  
Figure 1. 8-Lead SOIC_N (R-Suffix)  
B grade: 3 ppm/°C  
Low dropout operation: 500 mV  
Input range: (VOUT + 500 mV) to 18 V  
High output source and sink current  
+10 mA and −5 mA, respectively  
Wide temperature range: −40°C to +125°C  
ADR440/  
TP  
1
2
3
4
8
7
6
5
TP  
NC  
V
ADR441/  
ADR443/  
ADR444/  
ADR445  
V
IN  
NC  
OUT  
TOP VIEW  
(Not to Scale)  
GND  
TRIM  
APPLICATIONS  
NOTES  
1. NC = NO CONNECT  
2. TP = TEST PIN (DO NOT CONNECT)  
Precision data acquisition systems  
High resolution data converters  
Battery-powered instrumentation  
Portable medical instruments  
Industrial process control systems  
Precision instruments  
Figure 2. 8-Lead MSOP (RM-Suffix)  
Optical control circuits  
GENERAL DESCRIPTION  
Offered in two electrical grades, the ADR44x family is avail-  
able in 8-lead MSOP and narrow SOIC packages. All versions  
are specified over the extended industrial temperature range of  
−40°C to +125°C.  
The ADR44x series is a family of XFET® voltage references  
featuring ultralow noise, high accuracy, and low temperature  
drift performance. Using Analog Devices, Inc., patented  
temperature drift curvature correction and XFET (eXtra  
implanted junction FET) technology, voltage change vs.  
temperature nonlinearity in the ADR44x is greatly minimized.  
Table 1. Selection Guide  
Output  
Voltage  
(V)  
Initial  
Accuracy  
(mV)  
Temperature  
Coefficient  
(ppm/°C)  
The XFET references offer better noise performance than  
buried Zener references, and XFET references operate off  
low supply voltage headroom (0.5 V). This combination of  
features makes the ADR44x family ideally suited for precision  
signal conversion applications in high-end data acquisition  
systems, optical networks, and medical applications.  
Model  
ADR440A 2.048  
ADR440B 2.048  
ADR441A 2.500  
ADR441B 2.500  
ADR44±A ±.000  
ADR44±B ±.000  
ADR444A 4.096  
ADR444B 4.096  
ADR445A 5.000  
ADR445B 5.000  
±±  
±1  
±±  
±1  
±4  
±1.2  
±5  
±1.6  
±6  
±2  
10  
±
10  
±
10  
±
10  
±
The ADR44x family has the capability to source up to 10 mA of  
output current and sink up to −5 mA. It also comes with a trim  
terminal to adjust the output voltage over a 0.5% range without  
compromising performance.  
10  
±
Rev. E  
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 registeredtrademarks arethe 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 ©2005–2010 Analog Devices, Inc. All rights reserved.  
 
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