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| 型号： | AD8211YRJZ-R2 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 10/16页 |
| 文件大小： | 302K |
| 描述： | IC CURRENT MONITOR 0.25% SOT23-5 |
| 标准包装： | 250 |
| 功能： | 电流监控器 |
| 检测方法： | 高/低端 |
| 精确度： | ±0.25% |
| 输入电压： | -2 V ~ 65 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SC-74A，SOT-753 |
| 供应商设备封装： | SOT-23-5 |
| 包装： | 带卷 (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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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD8211YRJZ-R2 | 制造商:Analog Devices 功能描述:IC CURRENT SHUNT MONITOR 500KHZ SOT23-5 |
| AD8211YRJZ-R21 | 制造商:AD 制造商全称: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 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 |
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