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ADR444BRZ-REEL7 bảng dữ liệu(PDF) 1 Page - Analog Devices

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Ultralow Noise, LDO XFET® Voltage
References with Current Sink and Source
ADR440/ADR441/ADR443/ADR444/ADR445
Rev. A
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringements of patents or other
rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
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
©2006 Analog Devices, Inc. All rights reserved.
FEATURES
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
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
Wide temperature range: −40°C to +125°C
APPLICATIONS
Precision data acquisition systems
High resolution data converters
Battery-powered instrumentations
Portable medical instruments
Industrial process control systems
Precision instruments
Optical control circuits
PIN CONFIGURATIONS
NOTES
1. NC = NO CONNECT
2. TP = TEST PIN (DO NOT CONNECT)
TP 1
VIN 2
NC 3
GND 4
TP
8
NC
7
VOUT
6
TRIM
5
ADR440/
ADR441/
ADR443/
ADR444/
ADR445
TOP VIEW
(Not to Scale)
Figure 1. 8-Lead SOIC_N (R-Suffix)
TP 1
VIN 2
NC 3
GND 4
TP
8
NC
7
VOUT
6
TRIM
5
ADR440/
ADR441/
ADR443/
ADR444/
ADR445
TOP VIEW
(Not to Scale)
NOTES
1. NC = NO CONNECT
2. TP = TEST PIN (DO NOT CONNECT)
Figure 2. 8-Lead MSOP (RM-Suffix)
GENERAL DESCRIPTION
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.
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.
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.
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.
Table 1. Selection Guide
Model
Output
Voltage
(V)
Initial
Accuracy, ±
(mV)
Temperature
Coefficient
(ppm/°C)
ADR440A
2.048
3
10
ADR440B
2.048
1
3
ADR441A
2.500
3
10
ADR441B
2.500
1
3
ADR443A
3.000
4
10
ADR443B
3.000
1.2
3
ADR444A
4.096
5
10
ADR444B
4.096
1.6
3
ADR445A
5.000
6
10
ADR445B
5.000
2
3


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ADR444B AD-ADR444B Datasheet
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   Ultralow Noise, LDO XFET Voltage References with Current Sink and Source
Rev. E
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