參數(shù)資料
型號: AD8219BRMZ-RL
廠商: Analog Devices Inc
文件頁數(shù): 11/12頁
文件大?。?/td> 332K
描述: IC CURRENT MONITOR UNI-DIR 8MSOP
標準包裝: 3,000
功能: 電流監(jiān)控器
檢測方法: 高端
精確度: ±0.3%
輸入電壓: 4 V ~ 80 V
工作溫度: -40°C ~ 125°C
安裝類型: 表面貼裝
封裝/外殼: 8-TSSOP,8-MSOP(0.118",3.00mm 寬)
供應商設備封裝: 8-MSOP
包裝: 帶卷 (TR)
 
AD8219
 
Rev. A | Page 11 of 12
APPLICATIONS INFORMATION
HIGH-SIDE CURRENT SENSING
In this configuration, the shunt resistor is referenced to the
battery (see Figure 28). High voltage is present at the inputs
of the current sense amplifier. When the shunt is battery
referenced, the AD8219 produces a linear ground referenced
analog output.
+IN
I
LOAD
SHUNT
GND
IN
4V
TO
0V
AD8219
OUT
V
S
LOAD
 
Figure 28. Battery Referenced Shunt Resistor
Figure 28 shows the supply pin, VS, connected directly to the
positive input (+IN) pin. In this mode, the internal LDO powers
the AD8219 as long as the common-mode voltage at the input
pins is 4 V to 80 V. Additionally, V
S
 can also be connected to a
standalone supply that can vary from 4 V to 80 V as shown in
Figure 29.
+IN
I
LOAD
SHUNT
GND
IN
AD8219
OUT
V
S
4V
TO
0V
4V
TO
0V
LOAD
 
Figure 29. Standalone Supply Operation
MOTOR CONTROL CURRENT SENSING
The AD8219 is a practical, accurate solution for high-side
current sensing in motor control applications. In cases where
the shunt resistor is referenced to a battery and the current
flowing is unidirectional (as shown in Figure 30), the AD8219
monitors the current with no additional supply pin necessary
provided the battery voltage in the following circuit is in the 4 V
to 80 V range.
+IN
GND
IN
BATTERY
MOTOR
I
MOTOR
AD8219
OUT
V
S
 
Figure 30. High-Side Current Sensing in Motor Control
 
 
 
 
 
 
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