Is it suitable as an adc to be used for infrared noise canceling?

eunjae lee

Other Parts Discussed in Thread: ADS4145, ADC3244, ADC3224, ADC3664

The infrared signal containing noise is divided into two signals so that the phase is 180 degrees.
Communication data is communicated at 1 mhz, and at this time, it converts even ambient noise into a signal using adc.
Among the digitized signals, the 1 MHz data signal among the 0 degree phase signals is filtered, leaving only the noise component.
Using fpga, a signal of 180 degree phase and a signal of 0 degree phase are synthesized, leaving only 1Mhz communication signal. It is similar to RF noise canceling.


My question is, can the ad9255 adc digitize even ambient noise including signals at 1 mhz?

I'm not good at English, so please understand. thank you.

over 2 years ago

0 LeonardEllis over 2 years ago

TI__Guru 71526 points

Hello eunjae,

The AD9255 is an Analog Devices ADC. You will have to inquire with ADI for any recommendations.

If you would would like to design with a TI device, the ADS4145 www.ti.com/product/ADS4145 might be a good choice.

Regards,

~Leonard

0 eunjae lee over 2 years ago in reply to LeonardEllis

Prodigy 20 points

oh, sorry.

I was mistaken.

ADS4145 is differential input.

Are there any products that support single ended?

0 Rob Reeder over 2 years ago in reply to eunjae lee

TI__Mastermind 26230 points

Hi Eunjae,

What is the sampling rate required for your application?

How many channels/ADCs in the package do you need for the application?

This will help us down select the best ADC of choice for you.

Regards,

Rob

0 eunjae lee over 2 years ago in reply to Rob Reeder

Prodigy 20 points

Sorry for the late reply.

The sampling rate is expected to be around 100MSPS.

It is a concept to reduce noise components by dividing a signal containing noise by 180 degrees, filtering and synthesizing a 1MHZ data signal.

1 channels are used for adc. However, since most high-performance ADCs are designed to receive differential input, two dividers are used to divide the input signal. (ex, data+_vin+, data+_vin- input => 1_ADC, data-_vin+, data-_vin- input=> 2_ADC)

If there is a single ended ADC, I think that we can achieve the desired function by passing only one divider. ( ex , data+ input => 1_ADC, data- input => 2_ADC )

Can you recommend a divider along with ADC?

0 Rob Reeder over 2 years ago in reply to eunjae lee

TI__Mastermind 26230 points

Hi Eunjae,

I think it might good to send us a block diagram to understand your application better.

Here are no single-ended ADCs that sample at 100MSPS on the market. None that I know of. If you need a single-ended input, we typically use a balun for the analog input interface. If you need to DC couple, then use an amplifier to do this.

Regards,

Rob