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參數資料
| 型號： | AD8211YRJZ-RL1 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | High Voltage Current Shunt Monitor |
| 中文描述： | 高壓電流分流監控 |
| 文件頁數： | 12/16頁 |
| 文件大小： | 273K |
| 代理商： | AD8211YRJZ-RL1 |
AD8211
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.
Rev. 0 | Page 12 of 16
0
GND
2
V
IN+
V
IN–
1
3
5
4
OUT
V+
3
1
4
5
AD8211
5V
INDUCTIVE
LOAD
CLAMP
DIODE
SHUNT
SWITCH
BATTERY
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.
0
GND
2
V
IN+
V
IN–
1
3
5
4
OUT
V+
3
1
4
5
AD8211
5V
INDUCTIVE
CLAMP
DIODE
SHUNT
SWITCH
BATTERY
1
2
3
4
8
7
6
5
AD8214
GND
NC
–IN
OUT
V
REG
+IN
V
S
NC
DOVERCURRENT
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.
0
GND
2
V
IN+
V
IN–
1
3
5
4
OUT
V+
3
1
4
5
AD8211
5V
INDUCTIVE
LOAD
CLAMP
DIODE
SHUNT
BATTERY
SWITCH
Figure 27. Ground-Referenced Shunt Resistor
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相關代理商/技術參數 |
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| 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 |
| AD8211YRJZ-RL71 | 制造商:AD 制造商全稱:Analog Devices 功能描述:High Voltage Current Shunt Monitor |
| AD8212 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Dual-Channel Audio Difference Amplifier |
| AD8212_07 | 制造商:AD 制造商全稱:Analog Devices 功能描述:High Voltage Current Shunt Monitor |
| AD8212AL/QMLR | 制造商:Analog Devices 功能描述: |
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