Datasheet

V+
OUT
GND
IN-
IN+
C
BYPASS
Shutdown
Control
REF
Reference
Voltage
Supply
Load
R
SHUNT
Output
1MW
R
PROTECT
10W
R
PROTECT
10W
R
3
1MW R
4
INA199A1, INA199B1
INA199A2, INA199B2
INA199A3, INA199B3
www.ti.com SBOS469D –MAY 2009–REVISED NOVEMBER 2012
In the event that low-power zeners 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. This method is shown in Figure 25. The most space-efficient solutions
are dual series-connected diodes in a single SOT-523 or SOD-523 package. In both examples shown in
Figure 24 and Figure 25, the total board area required by the INA199 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 25. INA199 Transient Protection Using a Single Transzorb and Input Clamps
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Product Folder Links: INA199A1 INA199B1 INA199A2 INA199B2 INA199A3 INA199B3