Application information

Thread Starter

pinkyponky

Joined Nov 28, 2019
194
Hi all,

I have few questions on component and component selection. Please can you answer my questions below:


1) Which recommendation do I need to use in order to produce output as a same phase and same amplitude of the input signal?.
2) Why they are high input resistor (Rin) connected to the non-inverting amplifier?
3) Why inverting amplifier connected to GND and not-connecting to anything?.

Please can you answer all above questions?.
 
Last edited:

ericgibbs

Joined Jan 29, 2010
14,130
You type that Search in and post the datasheet to your Thread.

Addendum:
It is customary for the TS to provide the required information
You cannot reasonably expect every member who reads your Thread to do a Search and download the required datasheet.?
 
Last edited:

Irving

Joined Jan 30, 2016
2,308
I have choose LMH6704 component as buffer for ADC and DAC, but I have few questions on component and component selection. Please can you answer my questions below:
What was your criteria for selection? Why do you need such a wide bandwidth? What is your application (not just a buffer for adc/dac but wider context)?

1) Is this component is suitable for ADC and DAC applications?. Possibly, but what is context?

2) Which recommendation (in Figure 17 or figure 18) do I need to use in order to produce output as a same phase and same amplitude of the input signal?. Do you understand how operational amplifiers work?

3) Why they are high input resistor (Rin) connected to the non-inverting amplifier? Represents the matching impedance to your driving circuitry and is dependent on your application.

4) Why inverting amplifier connected to GND in figure 17 and not-connecting to anything in figure 18?. Read the datasheet, table 1

Please can you answer all above questions?. If you need to ask, you're not in a position to use this quite specialist device. Why not explain what your requirement is and maybe we can suggest a better approach...
 
Last edited:

MrChips

Joined Oct 2, 2009
24,609
Please rethink your thread title "Questions on Application information".
It provides no information on the content of the thread.
Get to the point with "LMH6704 buffer suitable for ADC and DAC applications?"
 

Irving

Joined Jan 30, 2016
2,308
With respect, you haven't given any info on your intended application so it is impossible to say if this will work for you. In theory any opamp can work as a buffer but the reality is very different in terms of noise, stability, bandwidth, voltage swing, etc.

Show a schematic of how you intend to use the device, together with other useful info like supply rail voltages, expected sampling rate, bandwidth, resolution of adc/dac, etc. and I can give you a proper opinion.
 
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