2024-04-21 11:56 PM
Hi Team,
I want to process PWM HART signals of 1.2 KHz/2.2KHz. Will the op-amp TSX631A be suitable for this application which is having a bandwidth of 200 KHz?
Regards,
Sreejith R Nair
2024-04-22 12:28 AM
Hi,
just clear definition : 2200 kHz or 1,2 kHz - or what ?
2024-04-22 12:32 AM
Hi,
Frequency is 1200 Hz - 1.2 KHz and 2200 Hz - 2.2 KHz
2024-04-22 01:01 AM
Ok, but what gain you want/use in your circuit ? (200 kHz is : gain bandwidth product )
2024-04-22 02:49 AM
Hi,
We suspect the gain is around -6.66 dB. Please find the circuit attached.
Regards,
Sreejith
2024-04-22 02:56 AM
Hi,
"suspect" is not the appropriate designation here . :)
More "we know" ...
220/33 k = 6,7 ; so max gain 6,7 x , giving 200k / 6,7 = 30 kHz upper fgo.
Much more than you need for 1...3 kHz range, so its perfect here.
2024-04-22 03:20 AM
Great. Thanks.
Can you tell me the quiescent current of TSX631A as well?
Regards,
Sreejith
2024-04-22 03:48 AM
Come on, you see the headline ?
The TSX63x and TSX63xA series offer a 200 kHz gain bandwidth product while consuming 60 μA maximum at 16 V.
:)
2024-04-23 06:59 PM
Hi sreejithrnair
This post has been escalated to the ST Online Support Team for additional assistance. We'll contact you directly.
Kind Regards
Joe WILLIAMS
STMicro Support
2024-04-26 08:06 AM
Again an already answered "analog opamp" post which was:
"escalated to the ST Online Support Team for additional assistance."
Why that? @Joe WILLIAMS
Big customer?