INA200_16 Datasheet, PDF (13/32 Pages) Texas Instruments – INA20x High-Side Measurement Current-Shunt Monitor

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Load Supply
-18V to +80V
C_BYPASS
0.01mF
1
V_S
INA200
(G = 20)
2 OUT
G
0.6V
R₁
Reference
V_IN+ 8
V_{IN- 7}
3 ^CMPIN
R₂
4
GND
Comparator
CMP_{OUT 6}
RESET ⁵
INA200, INA201, INA202
SBOS374D – NOVEMBER 2006 – REVISED OCTOBER 2015
R_SHUNT
3mW
Load
5V Supply
R_PULL-UP
4.7kW
Transparent/Reset Latch
Figure 26. INA200 Basic Connections
7.3.2 Selecting R_S
The value chosen for the shunt resistor, R_S, depends on the application and is a compromise between small-
signal accuracy and maximum permissible voltage loss in the measurement line. High values of R_S provide better
accuracy at lower currents by minimizing the effects of offset, while low values of R_S minimize voltage loss in the
supply line. For most applications, best performance is attained with an R_S value that provides a full-scale shunt
voltage range of 50 mV to 100 mV. Maximum input voltage for accurate measurements is 500 mV, but output
voltage is limited by supply.
7.3.3 Comparator
The INA200, INA201, and INA202 devices incorporate an open-drain comparator. This comparator typically has
2 mV of offset and a 1.3-μs (typical) response time. The output of the comparator latches and is reset through
the RESET pin; see Figure 28.
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