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參數資料
| 型號： | AD8211YRJZ-R2 |
| 廠商： | Analog Devices Inc |
| 文件頁數： | 10/16頁 |
| 文件大小： | 302K |
| 描述： | IC CURRENT MONITOR 0.25% SOT23-5 |
| 標準包裝： | 250 |
| 功能： | 電流監控器 |
| 檢測方法： | 高/低端 |
| 精確度： | ±0.25% |
| 輸入電壓： | -2 V ~ 65 V |
| 工作溫度： | -40°C ~ 125°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | SC-74A，SOT-753 |
| 供應商設備封裝： | SOT-23-5 |
| 包裝： | 帶卷 (TR) |
AD8211
Rev. A | Page 10 of 16
THEORY OF OPERATION
In typical applications, the AD8211 amplifies a small differential
input voltage generated by the load current flowing through
a shunt resistor. The AD8211 rejects high common-mode
voltages (up to 65 V) and provides a ground-referenced,
buffered output that interfaces with an analog-to-digital converter
(ADC). Figure 23 shows a simplified schematic of the AD8211.
V+
V
OUT
= (I
SHUNT
?R
SHUNT
) ?20
G = +20
AD8211
A1
PROPRIETARY
OFFSET
CIRCUITRY
ND
R1
R
OUT
Q1
R
I
SHUNT
I
IN
R
SHUNT
Figure 23. Simplified Schematic
A load current flowing through the external shunt resistor
produces a voltage at the input terminals of the AD8211. The
input terminals are connected to Amplifier A1 by Resistor R
and Resistor R1. The inverting terminal, which has very high
input impedance is held to
(VCM) (ISHUNT ?RSHUNT)
because negligible current flows through Resistor R. Amplifier
A1 forces the noninverting input to the same potential. Therefore,
the current that flows through Resistor R1, is equal to
I
IN
= (I
SHUNT
?R
SHUNT
)/R1
This current (I
IN
) is converted back to a voltage via R
OUT
. The
output buffer amplifier has a gain of 20 V/V and offers excellent
accuracy as the internal gain setting resistors are precision trimmed
to within 0.01% matching. The resulting output voltage is equal to
VOUT = (ISHUNT ?RSHUNT) ?20
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相關代理商/技術參數 |
參數描述 |
|---|---|
| AD8211YRJZ-R2 | 制造商:Analog Devices 功能描述:IC CURRENT SHUNT MONITOR 500KHZ SOT23-5 |
| AD8211YRJZ-R21 | 制造商:AD 制造商全稱:Analog Devices 功能描述:High Voltage Current Shunt Monitor |
| AD8211YRJZ-RL | 功能描述:IC CURRENT MONITOR 0.25% SOT23-5 RoHS:是 類別:集成電路 (IC) >> PMIC - 穩流/電流管理 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:50 系列:- 功能:電流開關 檢測方法:- 精確度:±10% 輸入電壓:1.7 V ~ 5.5 V 電流 - 輸出:600mA 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:10-UFQFN 供應商設備封裝:10-UTQFN（1.4x1.8） 包裝:管件 |
| AD8211YRJZ-RL1 | 制造商:AD 制造商全稱:Analog Devices 功能描述:High Voltage Current Shunt Monitor |
| AD8211YRJZ-RL7 | 功能描述:IC CURRENT MONITOR 0.25% SOT23-5 RoHS:是 類別:集成電路 (IC) >> PMIC - 穩流/電流管理 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:50 系列:- 功能:電流開關 檢測方法:- 精確度:±10% 輸入電壓:1.7 V ~ 5.5 V 電流 - 輸出:600mA 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:10-UFQFN 供應商設備封裝:10-UTQFN（1.4x1.8） 包裝:管件 |
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