TSX631A Op amp compatibility with 2200 KHz signals

[sreejithrnair]

Hi Team,

 

@Peter BENSCH 

 

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

[AScha.3]

Hi,

just clear definition : 2200 kHz or 1,2 kHz - or what ?

[sreejithrnair]

Hi,

 

Frequency is 1200 Hz - 1.2 KHz and 2200 Hz - 2.2 KHz

[AScha.3]

Ok,  but what gain you want/use in your circuit ?  (200 kHz is : gain bandwidth product )

[sreejithrnair]

Hi,

We suspect the gain is around -6.66 dB. Please find the circuit attached.

 

 

Regards,
Sreejith

[AScha.3]

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.

[sreejithrnair]

Great. Thanks.

Can you tell me the quiescent current of TSX631A as well?

 

 

Regards,

Sreejith

[AScha.3]

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.

:)

 

[Joe WILLIAMS]

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

[LCE]

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?