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參數(shù)資料
| 型號： | AD8209WBRMZ |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 3/16頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC AMP DIFF HV 8MSOP |
| 產(chǎn)品培訓(xùn)模塊： | Top Five Instrumentation Amplifier Problems |
| 標準包裝： | 50 |
| 放大器類型： | 差分 |
| 電路數(shù)： | 2 |
| 轉(zhuǎn)換速率： | 1 V/µs |
| 增益帶寬積： | 80kHz |
| 電流 - 輸入偏壓： | 50nA |
| 電壓 - 輸入偏移： | 2000µV |
| 電流 - 電源： | 1.6mA |
| 電壓 - 電源，單路/雙路(±)： | 4.5 V ~ 5.5 V |
| 工作溫度： | -40°C ~ 125°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-TSSOP，8-MSOP（0.118"，3.00mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 8-MSOP |
| 包裝： | 管件 |
| 產(chǎn)品目錄頁面： | 765 (CN2011-ZH PDF) |
Data Sheet
AD8209
Rev. B | Page 11 of 16
THEORY OF OPERATION
The AD8209 is a single-supply difference amplifier typically used
to amplify a small differential voltage in the presence of rapidly
changing, high common-mode voltages.
The AD8209 consists of two amplifiers (A1 and A2), a resistor
network, a small voltage reference, and a bias circuit (not shown);
The set of input attenuators preceding A1 consist of RA, RB, and
RC, which feature a combined series resistance of approximately
400 kΩ ± 20%. The purpose of these resistors is to attenuate the
input voltage to match the input voltage range of A1. This balanced
resistor network attenuates the common-mode signal by a ratio
of 1/14. The A1 amplifier inputs are held within the power supply
range, even as Pin 1 and Pin 8 exceed the supply or fall below the
common (ground). A reference voltage of 350 mV biases the
attenuator above ground, allowing Amplifier A1 to operate in
the presence of negative common-mode voltages.
The input resistor network also attenuates normal (differential)
mode voltages. Therefore, A1 features a gain of 97 V/V to provide
a total system gain, from ±IN to the output of A1, equal to 7 V/V,
as shown in the following equation:
Gain (A1) = 1/14 (V/V) × 97 (V/V) = 7 V/V
A precision trimmed, 100 kΩ resistor is placed in series with the
output of Amplifier A1. The user has access to this resistor via
an external pin (A1). A low-pass filter can be easily implemented
by connecting A1 to A2 and placing a capacitor to ground (see
The value of RF1 and RF2 is 10 kΩ, providing a gain of 2 V/V for
Amplifier A2. When connecting Pin A1 and Pin A2 together, the
AD8209 provides a total system gain equal to
Total Gain of (A1 + A2) (V/V) = 7 (V/V) × 2 (V/V) = 14 V/V
at the output of A2 (the OUT pin).
The ratios of RA, RB, RC, and RF are trimmed to a high level of
precision, allowing a typical CMRR value that exceeds 80 dB. This
performance is accomplished by laser trimming the resistor ratio
matching to better than 0.01%.
OUT
GND
VS
RC
RF
–IN
350mV
+
–
RB
RA
RC
RF
RG
RFILTER
RM
A1
A2
+IN
A1
A2
+
–
RF1
RF2
08461-
025
Figure 23. Simplified Schematic
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD8209WBRMZ | 制造商:Analog Devices 功能描述:IC DIFFERENTIAL AMP 80kHZ 1V/ MSOP8 |
| AD8209WBRMZ-R7 | 功能描述:IC AMP DIFF PREC 8MSOP RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標準包裝:50 系列:- 放大器類型:通用 電路數(shù):2 輸出類型:滿擺幅 轉(zhuǎn)換速率:1.8 V/µs 增益帶寬積:6.5MHz -3db帶寬:4.5MHz 電流 - 輸入偏壓:5nA 電壓 - 輸入偏移:100µV 電流 - 電源:65µA 電流 - 輸出 / 通道:35mA 電壓 - 電源，單路/雙路(±):1.8 V ~ 5.25 V，±0.9 V ~ 2.625 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬） 供應(yīng)商設(shè)備封裝:10-MSOP 包裝:管件 |
| AD8209WBRMZ-RL | 功能描述:IC AMP DIFF PREC 8MSOP RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標準包裝:50 系列:- 放大器類型:通用 電路數(shù):2 輸出類型:滿擺幅 轉(zhuǎn)換速率:1.8 V/µs 增益帶寬積:6.5MHz -3db帶寬:4.5MHz 電流 - 輸入偏壓:5nA 電壓 - 輸入偏移:100µV 電流 - 電源:65µA 電流 - 輸出 / 通道:35mA 電壓 - 電源，單路/雙路(±):1.8 V ~ 5.25 V，±0.9 V ~ 2.625 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬） 供應(yīng)商設(shè)備封裝:10-MSOP 包裝:管件 |
| AD8209WHRMZ | 功能描述:Differential Amplifier 1 Circuit 8-MSOP 制造商:analog devices inc. 系列:汽車級，AEC-Q100 包裝:管件 零件狀態(tài):有效 放大器類型:差分 電路數(shù):1 輸出類型:- 壓擺率:1 V/μs 增益帶寬積:80kHz -3db 帶寬:- 電流 - 輸入偏置:50nA 電壓 - 輸入失調(diào):2mV 電流 - 電源:1.6mA 電流 - 輸出/通道:- 電壓 - 電源，單/雙（±）:4.5 V ~ 5.5 V 工作溫度:-40°C ~ 150°C 安裝類型:表面貼裝 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:50 |
| AD8209WHRMZ-RL | 功能描述:Differential Amplifier 1 Circuit 8-MSOP 制造商:analog devices inc. 系列:汽車級，AEC-Q100 包裝:帶卷（TR） 零件狀態(tài):在售 放大器類型:差分 電路數(shù):1 輸出類型:- 壓擺率:1 V/μs 增益帶寬積:80kHz -3db 帶寬:- 電流 - 輸入偏置:50nA 電壓 - 輸入失調(diào):2mV 電流 - 電源:1.6mA 電流 - 輸出/通道:- 電壓 - 電源，單/雙（±）:4.5 V ~ 5.5 V 工作溫度:-40°C ~ 150°C 安裝類型:表面貼裝 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:3,000 |
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