Datasheet

INA21x-Q1
V+
OUT
GND
IN-
IN+
C
BYPASS
Shutdown
Control
REF
Reference
Voltage
Supply
Load
R
SHUNT
Output
1MΩ
R
PROTECT
10 Ω
R
PROTECT
10 Ω
R
3
1 MΩ R
4
INA212-Q1, INA213A-Q1
INA214-Q1
SBOS475D –MARCH 2009–REVISED OCTOBER 2013 www.ti.com
If low-power zener diodes do not have sufficient transient absorption capability and a higher power transzorb
must be used, the most package-efficient solution then involves using a single transzorb and back-to-back
diodes between the device inputs. The most space-efficient solutions are dual series-connected diodes in a
single SOT-523 or SOD-523 package. This method is shown in Figure 28. In either of these examples, the total
board area required by the INA21x-Q1 with all protective components is less than that of an SO-8 package, and
only slightly greater than that of an MSOP-8 package.
Figure 28. Transient Protection Using a Single Transzorb and Input Clamps
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