參數(shù)資料
型號(hào)： AD620BRZ-R7
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, 85 uV OFFSET-MAX, 1 MHz BAND WIDTH, PDSO8
封裝： LEAD FREE, MS-021-AA, SOIC-8
文件頁(yè)數(shù)： 17/20頁(yè)
文件大?。?/td> 559K
代理商： AD620BRZ-R7
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
相關(guān)PDF資料
PDF描述
AD620BRZ-RL Low Cost Low Power Instrumentation Amplifier
AD621 RE Series - Econoline Unregulated DC-DC Converters; Input Voltage (Vdc): 3.3V; Output Voltage (Vdc): 24V; Power: 1W; Industry Standard Pinout; 1kVDC & 2kVDC Isolation; UL94V-0 Package Material; Optional Continuous Short Circuit Protected; Fully Encapsulated; Custom Solutions Available; Efficiency to 85%
AD621A Low Drift, Low Power Instrumentation Amplifier
AD621AN Low Drift, Low Power Instrumentation Amplifier
AD621AR Low Drift, Low Power Instrumentation Amplifier
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AD620BRZ-RL 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:- 標(biāo)準(zhǔn)包裝:150 系列:- 放大器類型:音頻 電路數(shù):2 輸出類型:- 轉(zhuǎn)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(yīng)商設(shè)備封裝:8-TSSOP 包裝:管件
AD620SQ/883B 功能描述:儀表放大器 IC LOW POWER IN-AMP IC RoHS:否 制造商:Texas Instruments 通道數(shù)量: 輸入補(bǔ)償電壓:150 V 可用增益調(diào)整: 最大輸入電阻:10 kOhms 共模抑制比（最小值）:88 dB 工作電源電壓:2.7 V to 36 V 電源電流:200 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:MSOP-8 封裝:Bulk
AD621 制造商:AD 制造商全稱:Analog Devices 功能描述:10 MHz, 20 V/レs, G = 1, 10, 100, 1000 i CMOS㈢ Programmable Gain Instrumentation Amplifier
AD621-00E 功能描述:SENS MAG SW 20G CROS AXIS 8-MSOP 制造商:nve corp/sensor products 系列:AD 包裝:管件 零件狀態(tài):有效 功能:全極開關(guān) 技術(shù):霍爾效應(yīng) 極化:任意一種 感應(yīng)范圍:±2.5mT 跳閘，±1.1mT 釋放 測(cè)試條件:-40°C ~ 125°C 電壓 - 電源:4.5 V ~ 30 V 電流 - 電源（最大值）:4.5mA 電流 - 輸出（最大值）:20mA 輸出類型:開路集電極 特性:- 工作溫度:-40°C ~ 125°C（TA） 封裝/外殼:8-TSSOP，8-MSOP（0.118"，3.00mm 寬） 供應(yīng)商器件封裝:8-MSOP 標(biāo)準(zhǔn)包裝:1,000
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