INA181-Q1: P2P with INA181 but better CMRR

Chuqiang Wen

Part Number: INA181-Q1
Other Parts Discussed in Thread: INA296A, INA281-Q1, INA240-Q1, INA241A, INA293-Q1, INA190-Q1

Hi Expert,

May you kindly suggest one device with similar spec but higher CMRR than INA181-Q1? And they are pin compatible.

Thanks!

Ethan Wen

over 1 year ago

0 Peter Iliya over 1 year ago

TI__Mastermind 31915 points

Hey Ethan,

There really is no pin-to-pin compatible device with the INA181-Q1 (SOT23-6). The closest device is INA281-Q1/INA293-Q1, but this device is not bidirectional and thus does not have a REF pin, which could be critical to the design. Bidirectional devices with better CMRR and similar functionality are INA296A/INA241A (no automotive qualified version... yet), INA190-Q1, and INA240-Q1.

Here is a broad parametric search using key filters (>25V Vcm rating, SOT23/SOT23-thin, bidirectional):

https://www.ti.com/amplifier-circuit/current-sense/analog-output/products.html#p3278=Analog%20output;Analog%20output%20with%20integrated%20comparator&p726max=25;120&p480=1;1&~p2192=Bi-directional&p2954=SOT-23;SOT-23-THIN;SOT-5X3&sort=p2954;desc

Sincerely,

Peter

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INA181-Q1: P2P with INA181 but better CMRR