INA21x-Q1

V+

OUT

GND

IN-

IN+

C

BYPASS

Shutdown

Control

REF

Reference

Voltage

Supply

Load

R

SHUNT

Output

1 MΩ

R

PROTECT

10 Ω

R

PROTECT

10 Ω

R

3

1 MΩ

R

4

Copyright © 2017, Texas Instruments Incorporated

Figure 6-5. INA21x-Q1 Transient Protection Using Dual Zener Diodes

In the event that 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. Figure 6-6 shows this method. In either of these examples, the

total board area required by the INA21x-Q1 family of devices with all protective components is less than that of

an SO-8 package, and only slightly greater than that of an MSOP-8 package.

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

Copyright © 2017, Texas Instruments Incorporated

Figure 6-6. INA21x-Q1 Transient Protection Using a Single Transzorb and Input Clamps

www.ti.com

INA210-Q1, INA211-Q1, INA212-Q1, INA213-Q1, INA214-Q1, INA215-Q1

SBOS475K – MARCH 2009 – REVISED NOVEMBER 2023

Copyright © 2023 Texas Instruments Incorporated

Submit Document Feedback

17

Product Folder Links: INA210-Q1 INA211-Q1 INA212-Q1 INA213-Q1 INA214-Q1 INA215-Q1