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ADC Suggestion over LTC248x

Kenichiro
Mastermind 9165 points
Other Parts Discussed in Thread: ADS1146, ADS1220, ADS1118, ADS1113

ADC Suggestion over LTC248x

Hi,

I have been looking for good replacement of LTC248x ADC from LTC in conjunction with some requirement from customer.
Can anyone help me to find out competitive alternative from TI?

LTC2484 24-Bit ∆Σ ADC with Easy Drive Input Current Cancellation
cds.linear.com/.../2484ff.pdf

Requirements from my customer
* 1Ch Single-ended input, 0V to 5V voltage range
* Delta-Sigma
* better than 16bit resolution
* Low power preferred

I have found ADS1146, however it seems that this cannot support 0V to 5V single-ended input voltage range.


On top of that, from better accuracy, less error and/or noise immunity perspective, should I select differential input ADC?

Thank you for your help in advance.
Regards,
Ken

  • 0
    TI__Guru* 97795 points
    Kenchiro-san,


    I'm not sure device would be the best replacement for the LTC248x. In terms of functionality, it's similar to the ADS1220, except that our device has two channels and several other features often used in sensor measurement.

    If your customer can use a 16-bit device, then the ADS1113 and ADS1118 are possible options. These have less features but use an internal reference and the input range can be scaled to include the desired input range.

    As for the question about the differential input ADC, I don't think it makes much difference for any of those characteristics.


    Joseph Wu