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| 型号： | AD8211YRJZ-R21 |
| 厂商： | Analog Devices, Inc. |
| 英文描述： | High Voltage Current Shunt Monitor |
| 中文描述： | 高压电流分流监控 |
| 文件页数： | 10/16页 |
| 文件大小： | 273K |
| 代理商： | AD8211YRJZ-R21 |
AD8211
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.
Rev. 0 | Page 10 of 16
0
V+
V
OUT
= (I
SHUNT
× R
SHUNT
) × 20
G = +20
AD8211
A1
PROPRIETARY
OFFSET
CIRCUITRY
GND
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
(
V
CM
) (
I
SHUNT
×
R
SHUNT
)
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
V
OUT
= (
I
SHUNT
×
R
SHUNT
) × 20
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD8211YRJZ-RL | 功能描述:IC CURRENT MONITOR 0.25% SOT23-5 RoHS:是 类别:集成电路 (IC) >> PMIC - 稳流/电流管理 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:50 系列:- 功能:电流开关 检测方法:- 精确度:±10% 输入电压:1.7 V ~ 5.5 V 电流 - 输出:600mA 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:10-UFQFN 供应商设备封装:10-UTQFN（1.4x1.8） 包装:管件 |
| AD8211YRJZ-RL1 | 制造商:AD 制造商全称: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 类别:集成电路 (IC) >> PMIC - 稳流/电流管理 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:50 系列:- 功能:电流开关 检测方法:- 精确度:±10% 输入电压:1.7 V ~ 5.5 V 电流 - 输出:600mA 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:10-UFQFN 供应商设备封装:10-UTQFN（1.4x1.8） 包装:管件 |
| AD8211YRJZ-RL71 | 制造商:AD 制造商全称:Analog Devices 功能描述:High Voltage Current Shunt Monitor |
| AD8212 | 制造商:AD 制造商全称:Analog Devices 功能描述:Dual-Channel Audio Difference Amplifier |
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