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AD8224ACPZ-R7 データシート(PDF) 1 Page - Analog Devices

部品番号 AD8224ACPZ-R7
部品情報  Precision, Dual-Channel, JFET Input Rail-to-Rail Instrumentation Amplifier
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メーカー  AD [Analog Devices]
ホームページ  http://www.analog.com
Logo AD - Analog Devices

AD8224ACPZ-R7 データシート(HTML) 1 Page - Analog Devices

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Precision, Dual-Channel, JFET Input
Rail-to-Rail Instrumentation Amplifier
AD8224
Rev. 0
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
©2007 Analog Devices, Inc. All rights reserved.
FEATURES
Two channels in a small 4 mm × 4 mm LFCSP
Low input currents
25 pA maximum input bias current
2 pA maximum input offset current
High CMRR
94 dB CMRR (minimum), G = 10
84 dB CMRR (minimum) to 10 kHz, G = 10
Excellent ac specifications and low power
1.5 MHz bandwidth (G = 1)
14 nV/√Hz input noise (1 kHz)
Slew rate 2 V/μs
750 μA quiescent current per amplifier (maximum)
Versatility
Rail-to-rail output
Input voltage range to below negative supply rail
4 kV ESD protection
4.5 V to 36 V single supply
±2.25 V to ±18 V dual supply
Gain set with single resistor (G = 1 to 1000)
APPLICATIONS
Medical instrumentation
Precision data acquisition
Transducer interface
Differential drive for high resolution input ADCs
Remote sensors
FUNCTIONAL BLOCK DIAGRAM
AD8224
1
2
3
4
12
11
10
9
56
7
8
13
14
15
16
–IN1
RG1
RG1
+IN1
–IN2
RG2
RG2
+IN2
Figure 1.
Table 1. In Amps and Difference Amplifiers by Category
High
Perform.
Low
Cost
High
Voltage
Mil
Grade
Low
Power
Digital
Gain
AD82201
AD85531
AD628
AD620
AD6271
AD82311
AD8221
AD6231
AD629
AD621
AD8250
AD8222
AD524
AD8251
AD526
AD85551
AD624
AD85561
AD85571
1 Rail-to-rail output.
GENERAL DESCRIPTION
The AD8224 is the first single-supply junction field effect
transistor (JFET) input instrumentation amplifier available in
the space-saving 16-lead, 4 mm × 4 mm LFCSP. It requires the
same board area as a typical single instrumentation amplifier
yet doubles the channel density and offers a lower cost per
channel without compromising performance.
Designed to meet the needs of high performance, portable
instrumentation, the AD8224 has a minimum common-mode
rejection ratio (CMRR) of 78 dB at dc and a minimum CMRR
of 74 dB at 10 kHz for G = 1. Maximum input bias current is
25 pA and typically remains below 300 pA over the entire
industrial temperature range. Despite the JFET inputs, the
AD8224 typically has a noise corner of only 10 Hz.
With the proliferation of mixed-signal processing, the number of
power supplies required in each system has grown.
Designed to alleviate this problem, the AD8224 can operate on a
±18 V dual supply, as well as on a single +5 V supply. The device’s
rail-to-rail output stage maximizes dynamic range on the low
voltage supplies common in portable applications. Its ability to run
on a single 5 V supply eliminates the need for higher voltage, dual
supplies. The AD8224 draws a maximum of 750 μA of quiescent
current per amplifier, making it ideal for battery-powered devices.
In addition, the AD8224 can be configured as a single-channel,
differential output instrumentation amplifier. Differential
outputs provide high noise immunity, which can be useful when
the output signal must travel through a noisy environment, such
as with remote sensors. The configuration can also be used to
drive differential input ADCs.
For a single-channel version, use the AD8220.


同様の部品番号 - AD8224ACPZ-R7

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同様の説明 - AD8224ACPZ-R7

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