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參數(shù)資料
| 型號(hào)： | AD620ARZ-REEL |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 運(yùn)動(dòng)控制電子 |
| 英文描述： | Low Cost Low Power Instrumentation Amplifier |
| 中文描述： | INSTRUMENTATION AMPLIFIER, 150 uV OFFSET-MAX, 1 MHz BAND WIDTH, PDSO8 |
| 封裝： | LEAD FREE, MS-021-AA, SOIC-8 |
| 文件頁數(shù)： | 17/20頁 |
| 文件大小： | 559K |
| 代理商： | AD620ARZ-REEL |
AD620
Rev. G | Page 17 of 20
499
AD620
+
–
V
OUT
R
R
C
C
C
D
C
C
+IN
–IN
REF
–15V
0.1
μ
F
1
μ
F
0
+15V
0.1
μ
F
1
μ
F
0
0
Figure 43. Circuit to Attenuate RF Interference
COMMON-MODE REJECTION
Instrumentation amplifiers, such as the AD620, offer high
CMR, which is a measure of the change in output voltage when
both inputs are changed by equal amounts. These specifications
are usually given for a full-range input voltage change and a
specified source imbalance.
For optimal CMR, the reference terminal should be tied to a
low impedance point, and differences in capacitance and
resistance should be kept to a minimum between the two
inputs. In many applications, shielded cables are used to
minimize noise; for best CMR over frequency, the shield
should be properly driven. Figure 44 and Figure 45 show active
data guards that are configured to improve ac common-mode
rejections by “bootstrapping” the capacitances of input cable
shields, thus minimizing the capacitance mismatch between the
inputs.
REFERENCE
V
OUT
AD620
100
100
– INPUT
+ INPUT
AD648
R
G
–V
S
+V
S
–V
S
0
Figure 44. Differential Shield Driver
100
– INPUT
+ INPUT
REFERENCE
V
OUT
AD620
–V
S
+V
S
2
R
G
2
R
G
AD548
0
Figure 45. Common-Mode Shield Driver
GROUNDING
Since the AD620 output voltage is developed with respect to the
potential on the reference terminal, it can solve many
grounding problems by simply tying the REF pin to the
appropriate “l(fā)ocal ground.”
To isolate low level analog signals from a noisy digital
environment, many data-acquisition components have separate
analog and digital ground pins (Figure 46). It would be
convenient to use a single ground line; however, current
through ground wires and PC runs of the circuit card can cause
hundreds of millivolts of error. Therefore, separate ground
returns should be provided to minimize the current flow from
the sensitive points to the system ground. These ground returns
must be tied together at some point, usually best at the ADC
package shown in Figure 46.
DIGITAL P.S.
+5V
C
ANALOG P.S.
+15V C –15V
AD574A
ADC
DIGITAL
DATA
OUTPUT
+
1
μ
F
AD620
0.1
μ
F
AD585
S/H
0.1
μ
F
1
μ
F 1
μ
F
0
Figure 46. Basic Grounding Practice
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|---|---|
| AD620ARZ-REEL7 | 功能描述:IC AMP INST LP LN 18MA 8SOIC RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 產(chǎn)品培訓(xùn)模塊:Differential Circuit Design Techniques for Communication Applications 標(biāo)準(zhǔn)包裝:1 系列:- 放大器類型:RF/IF 差分 電路數(shù):1 輸出類型:差分 轉(zhuǎn)換速率:9800 V/µs 增益帶寬積:- -3db帶寬:2.9GHz 電流 - 輸入偏壓:3µA 電壓 - 輸入偏移:- 電流 - 電源:40mA 電流 - 輸出 / 通道:- 電壓 - 電源，單路/雙路(±):3 V ~ 3.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:16-VQFN 裸露焊盤，CSP 供應(yīng)商設(shè)備封裝:16-LFCSP-VQ 包裝:剪切帶 (CT) 產(chǎn)品目錄頁面:551 (CN2011-ZH PDF) 其它名稱:ADL5561ACPZ-R7CT |
| AD620ARZ-REEL7-MOOG | 制造商:Analog Devices 功能描述: |
| AD620B | 制造商:AD 制造商全稱:Analog Devices 功能描述:Low Cost, Low Power Instrumentation Amplifier |
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| AD620BNZ | 功能描述:IC AMP INST LP LN 18MA 8DIP RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 放大器類型:通用 電路數(shù):4 輸出類型:- 轉(zhuǎn)換速率:0.6 V/µs 增益帶寬積:1MHz -3db帶寬:- 電流 - 輸入偏壓:45nA 電壓 - 輸入偏移:2000µV 電流 - 電源:1.4mA 電流 - 輸出 / 通道:40mA 電壓 - 電源，單路/雙路(±):3 V ~ 32 V，±1.5 V ~ 16 V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:14-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:14-TSSOP 包裝:帶卷 (TR) 其它名稱:LM324ADTBR2G-NDLM324ADTBR2GOSTR |
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