Other Parts Discussed in Thread: INA214
When INA214 of device power OFF(V+), failure occurred when a signal is input to the Analog input(IN+/IN-).
Customer uses the INA214 to supply current measurement of 18V.
Currently, the failure of the INA214 has multiple number generation.
Circuit the customer is using, will be on the same circuit as the datasheet (SBOS437G) page18 Figure27.
In customer applications it has to operate under the following conditions.
Supply = 18V
Rshunt = 5mΩ
Rprotect = 10Ω (+Diord)
REF= GND (0V)
V+ = +3.3V
GND = 0V
Please let the two questions.
1) When IN-/IN+=18V and V+=0V, a potential of about 1.26V are output to the OUT-pin.
18V is impressed on Analog input, and at V+=0V, is about 1.26 V output by OUT-pin?
2) Cbypass is connected to V+. This condenser value is done now using 0.22uF.
Is it also no problem using 0.22uF?
○The point by which a device breaks down?
About 1.26V is output by OUT-pin at IN-/IN+=18V, V+=0V.
IN-/IN+ terminal can observe about hundreds of Ω and low impedance.
○When it doesn't break down.
The electric potential assumes in OUT at IN-/IN+=18V, V+=3.3V, and is output. (All right)
I'm quite in trouble.
Please tell me POINT which confirms the problem.
Give my best regards.
