ADS8509: ADS8509

Jewel Holt

Part Number: ADS8509

I notice that the reference voltage for the ADC is 2.5 V yet it can supply +-10V. Can you explain how this works? Is it being multiplied internally?
Thank you.

over 1 year ago

+1 Tom Hendrick over 1 year ago

TI__Guru**** 172516 points

Hi Jewel,

The ADS8509 is actually dividing internally. The figure on the first page of the datasheet shows the values of three resistors internal to the device at the RXin pins - these are 9.8k, 4.9k and 2.5k. If you then take a look at Figure 29 and Figure 30, they show you external resistor strapping that you would need to accommodate the variety on input voltage ranges.

0 Jewel Holt over 1 year ago in reply to Tom Hendrick

Prodigy 50 points

I see it! Thank you.

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ADS8509: ADS8509