LMV796: How to select OPA

YUSHU CHEN

Part Number: LMV796
Other Parts Discussed in Thread: OPA2376, TLV9062

If power stage working frequency around 500KHz, how to select right OPA for Current detect real-time ?

0 Bala Ravi over 4 years ago

Hi Yushu,

Please check out our cookbook circuits which includes various current sensing applications: https://www.ti.com/seclit/sl/slyy137a/slyy137a.pdf.

Here is the link to "Single-Supply, low-side Unidirectional Current Sensing" circuit: http://www.ti.com/lit/an/sboa285/sboa285.pdf.

You can use the following devices for your application: TLV9062, OPA2376. Please find the comparison table below:

Best Regards,

Bala Ravi

0 Michael Steffes over 4 years ago

Guru 47535 points

Hello Yushu,

Can really only answer in context of the intended circuit.

1. What is your sense resistor value

2. How much gain are thinking of (ADC full scale input range from max sense voltage)

3. harmonic content of interest

4. intended power supplies

5.unipolar or bipolar current sense

0 Bala Ravi over 4 years ago

Hi Yushu,

If you don't have any follow-up questions, I will go ahead and close this thread.

Best Regards,

Bala Ravi

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