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參數資料
| 型號： | AD8221BR |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 運動控制電子 |
| 英文描述： | Single Supply, Rail-to-Rail, Low Cost Instrumentation Amplifier |
| 中文描述： | INSTRUMENTATION AMPLIFIER, 25 uV OFFSET-MAX, 0.825 MHz BAND WIDTH, PDSO8 |
| 封裝： | MS-012AA, SOIC-8 |
| 文件頁數： | 16/20頁 |
| 文件大小： | 1283K |
| 代理商： | AD8221BR |
AD8221
RF INTERFERENCE
RF rectification is often a problem when amplifiers are used in
applications where there are strong RF signals. The disturbance
may appear as a small dc offset voltage. High frequency signals
can be filtered with a low-pass R-C network placed at the input
of the instrumentation amplifier, as shown in Figure 49. The
filter limits the input signal bandwidth according to the
following relationship:
Rev. A | Page 16 of 20
C
D
affects the difference signal and C
C
affects the common-
mode signal. Values of R and C
C
should be chosen to minimize
RFI. Mismatch between the R × C
C
at the positive input and the
R × C
C
at negative input will degrade the AD8221’s CMRR. By
using a value of C
D
one magnitude larger than C
C
, the effect of
the mismatch is reduced, and hence, performance is improved.
PRECISION STRAIN GAGE
The AD8221’s low offset and high CMRR over frequency make
it an excellent candidate for bridge measurements. As shown in
Figure 50, the bridge can be directly connected to the inputs of
the amplifier.
)
2
R
π
2
1
C
D
Diff
C
C
FilterFreq
+
=
C
CM
RC
π
FilterFreq
2
1
=
+5V
+2.5V
0
10
μ
F
0.1
μ
F
AD8221
+IN
–IN
R
350
350
350
350
+
–
where
C
D
≥
10
C
C
.
R
R
AD8221
+15V
+IN
–IN
0.1
μ
F
10
μ
F
10
μ
F
0.1
μ
F
REF
V
OUT
–15V
R1
499
C
D
C
C
C
C
10nF
1nF
1nF
0
4.02k
4.02k
Figure 50. Precision Strain Gage
Figure 49. RFI Suppression
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| AD8221-EVAL | Single Supply, Rail-to-Rail, Low Cost Instrumentation Amplifier |
| AD8221AR | Single Supply, Rail-to-Rail, Low Cost Instrumentation Amplifier |
| AD8221 | Single Supply, Rail-to-Rail, Low Cost Instrumentation Amplifier |
相關代理商/技術參數 |
參數描述 |
|---|---|
| AD8221BRM | 制造商:Analog Devices 功能描述:SOIC IN AMP WITH FIXED GAIN OF 5 - Bulk |
| AD8221BRREEL | 制造商:Analog Devices 功能描述: |
| AD8221BR-REEL | 功能描述:IC AMP INST PREC LN 18MA 8SOIC RoHS:否 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標準包裝:150 系列:- 放大器類型:音頻 電路數:2 輸出類型:- 轉換速率:5 V/µs 增益帶寬積:12MHz -3db帶寬:- 電流 - 輸入偏壓:100nA 電壓 - 輸入偏移:500µV 電流 - 電源:6mA 電流 - 輸出 / 通道:50mA 電壓 - 電源，單路/雙路(±):4 V ~ 32 V，±2 V ~ 16 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-TSSOP（0.173"，4.40mm 寬） 供應商設備封裝:8-TSSOP 包裝:管件 |
| AD8221BRREEL7 | 制造商:Analog Devices 功能描述: |
| AD8221BR-REEL7 | 功能描述:IC AMP INST PREC LN 18MA 8SOIC RoHS:否 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標準包裝:50 系列:- 放大器類型:J-FET 電路數:2 輸出類型:- 轉換速率:3.5 V/µs 增益帶寬積:1MHz -3db帶寬:- 電流 - 輸入偏壓:30pA 電壓 - 輸入偏移:2000µV 電流 - 電源:200µA 電流 - 輸出 / 通道:- 電壓 - 電源，單路/雙路(±):7 V ~ 36 V，±3.5 V ~ 18 V 工作溫度:0°C ~ 70°C 安裝類型:通孔 封裝/外殼:8-DIP（0.300"，7.62mm） 供應商設備封裝:8-PDIP 包裝:管件 |
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