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參數(shù)資料
| 型號： | AD621 |
| 廠商： | Analog Devices, Inc. |
| 元件分類： | DC/DC變換器 |
| 英文描述： | 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% |
| 中文描述： | 低漂移，低功耗儀表放大器 |
| 文件頁數(shù)： | 15/16頁 |
| 文件大?。?/td> | 663K |
| 代理商： | AD621 |
AD621
REV. A
–15–
GROUNDING
Since the AD621 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.”
In order to isolate low level analog signals from a noisy digital
environment, many data-acquisition components have separate
analog and digital ground pins (Figure 41). It would be conve-
nient to use a single ground line; however, current through
ground wires and PC runs of the circuit card can cause hun-
dreds of millivolts of error. Therefore, separate ground returns
should be provided to minimize the current flow from the sensi-
tive points to the system ground. These ground returns must be
tied together at some point, usually best at the ADC package as
shown.
DIGITAL P.S.
+5V
C
ANALOG P.S.
+15V
C
–15V
AD574A
ADC
DIGITAL
DATA
OUTPUT
+
1
μ
F
AD621
0.1
μ
F
AD585
S/H
3
5
9
11
15
6
2
4
7
1
11
7
6
4
0.1
μ
F
1
μ
F
1
μ
F
Figure 41. Basic Grounding Practice
GROUND RETURNS FOR INPUT BIAS CURRENTS
Input bias currents are those currents necessary to bias the input
transistors of an amplifier. There must be a direct return path
for these currents; therefore when amplifying “floating” input
sources such as transformers, or ac-coupled sources, there must
be a dc path from each input to ground as shown in Figures 42a
through 42c. Refer to the
Instrumentation Amplifier Application
Guide
(free from Analog Devices) for more information regard-
ing in amp applications.
V
OUT
7
+V
S
–V
S
AD621
– INPUT
+ INPUT
LOAD
TO POWER
SUPPLY
GROUND
REFERENCE
2
3
4
5
6
Figure 42a. Ground Returns for Bias Currents when Using
Transformer Input Coupling
V
OUT
7
+V
S
–V
S
AD621
– INPUT
+ INPUT
LOAD
TO POWER
SUPPLY
GROUND
REFERENCE
2
3
4
5
6
Figure 42b. Ground Returns for Bias Currents when Using
a Thermocouple Input
100k
V
OUT
7
+V
S
–V
S
AD621
– INPUT
+ INPUT
LOAD
TO POWER
SUPPLY
GROUND
REFERENCE
2
3
4
5
6
100k
Figure 42c. Ground Returns for Bias Currents when Using
AC Input Coupling
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AD621A | Low Drift, Low Power Instrumentation Amplifier |
| AD621AN | Low Drift, Low Power Instrumentation Amplifier |
| AD621AR | Low Drift, Low Power Instrumentation Amplifier |
| AD621B | RE Series - Econoline Unregulated DC-DC Converters; Input Voltage (Vdc): 3.3V; Output Voltage (Vdc): 3.3V; 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% |
| AD621BN | Low Drift, Low Power Instrumentation Amplifier |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 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 標準包裝:1,000 |
| AD621-02E | 功能描述:SENSOR MAG SW 20G CROS AXS 8SOIC 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-SOIC（0.154"，3.90mm 寬） 供應(yīng)商器件封裝:8-SOIC 標準包裝:1,000 |
| AD621A | 制造商:AD 制造商全稱:Analog Devices 功能描述:Low Drift, Low Power Instrumentation Amplifier |
| AD621ACHIPS | 制造商:AD 制造商全稱:Analog Devices 功能描述:Low Drift, Low Power Instrumentation Amplifier |
| AD621AN | 制造商:Analog Devices 功能描述:SP Amp INSTR Amp Single 制造商:Analog Devices 功能描述:IC AMP INSTRUMENTATION DIP8 621 |
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