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| 型号： | AD8211YRJZ-RL |
| 厂商： | Analog Devices Inc |
| 文件页数： | 12/16页 |
| 文件大小： | 302K |
| 描述： | IC CURRENT MONITOR 0.25% SOT23-5 |
| 标准包装： | 10,000 |
| 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 12 of 16
APPLICATIONS INFORMATION
HIGH-SIDE CURRENT SENSE WITH A LOW-SIDE
SWITCH
In such load control configurations, the PWM-controlled
switch is ground referenced. An inductive load (solenoid) is tied
to a power supply. A resistive shunt is placed between the switch
and the load (see Figure 25). An advantage of placing the shunt on
the high side is that the entire current, including the recirculation
current, can be measured because the shunt remains in the loop
when the switch is off. In addition, diagnostics can be enhanced
because shorts to ground can be detected with the shunt on the
high side. In this circuit configuration, when the switch is
closed, the common-mode voltage moves down to near the
negative rail. When the switch is opened, the voltage reversal
across the inductive load causes the common-mode voltage to
be held one diode drop above the battery by the clamp diode.
GND
2
V
IN+
V
IN
1
5
OUT
V+
3
4
AD8211
5V
INDUCTIVE
LOAD
CLAMP
DIODE
SHUNT
SWITCH
BATTERY
1
2
3
5
4
Figure 25. Low-Side Switch
HIGH-SIDE CURRENT SENSING
In this configuration, the shunt resistor is referenced to the
battery. High voltage is present at the inputs of the current sense
amplifier. In this mode, the recirculation current is again measured
and shorts to ground can be detected. When the shunt is battery
referenced, the AD8211 produces a linear ground-referenced
analog output. An AD8214 can also be used to provide an over-
current detection signal in as little as 100 ns. This feature is
useful in high current systems where fast shutdown in over-
current conditions is essential.
GND
2
V
IN+
V
IN
1
5
OUT
V+
3
4
AD8211
5V
INDUCTIVE
LOAD
CLAMP
DIODE
SHUNT
SWITCH
BATTERY
1
2
3
4
8
7
6
5
AD8214
GND NC
IN
OUT
V
REG
+IN
V
S
NC
OVERCURRENT
ETECTION (<100ns)
1
2
3
5
4
Figure 26. Battery-Referenced Shunt Resistor
LOW-SIDE CURRENT SENSING
In systems where low-side current sensing is preferred, the
AD8211 provides an integrated solution with great accuracy.
Ground noise is rejected, CMRR is typically higher than 90 dB,
and output linearity is not compromised, regardless of the input
differential voltage.
GND
2
V
IN+
V
IN
1
5
OUT
V+
3
4
AD8211
5V
INDUCTIVE
LOAD
CLAMP
DIODE
SHUNT
BATTERY
SWITCH
1
2
3
5
4
Figure 27. Ground-Referenced Shunt Resistor
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 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 |
| AD8212_07 | 制造商:AD 制造商全称:Analog Devices 功能描述:High Voltage Current Shunt Monitor |
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