Dstc452 5751017-a
For sale
Louisiana, Baton Rouge, xiamen
$
520.00
USD
AMIKON LIMITED
Sales ManagerNancy
Emailinfo@amikon.cn
Wechat + 8618020776786
Skypeonlywnn_1
Website www.amikon.cn
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AMIKON LIMITED to the professional, integrity, innovation, cooperation, win-win
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DSTC452 5751017-A
DSTC452 5751017-A
DSTC452 5751017-A
Low-Side Current Sensing
As shown in Figure 1, low-side current sensing
connects the sensing resistor between the load and
ground. Normally, the sensed voltage signal
(VSEN = ISEN × RSEN) is so small that it needs to be
amplified by subsequent op amp circuits (e.g., noninverting
amplifier) to get the measurable output
voltage (VOUT).
Advantages
- Low input Common mode voltage
- Low VDD parts
- Ground referenced input and output
- Simplicity and low cost
b) Disadvantages
- Ground path disturbance
- Load is lifted from system ground since RSEN
adds undesirable resistance to the ground
path
- High load current caused by accidental short
goes undetected
In a single-supply configuration, the most important
aspect of low-side current sensing is that the Common
mode input voltage range (VCM) of the op amp must
include ground. The MCP6H0X op amp is a good
choice since its VCM is from VSS – 0.3V to VDD – 2.3V.
Considering the advantages, choose low-side current
sensing where short circuit detection is not required,
and ground disturbances can be tolerated.
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