ADS8684: Range of Internal PGA

Francis Jiang

Intellectual 1640 points

Part Number: ADS8684

Tool/software:

Hi Team,

What's the range of internal PGA? Datasheet is not show. Thanks in advance.

BRs,

Francis

17 hours ago

0 Tom Hendrick 16 hours ago

TI__Guru**** 172236 points

Hi Francis,

Table 3, as you noted above, shows the input range of the PGA. What is unclear to you about the input range(s)?

0 Francis Jiang 12 hours ago in reply to Tom Hendrick

TI__Intellectual 1640 points

Hi Tom,

Sorry for the confusion, need the gain range of PGA. Thanks.

BRs,

Francis

0 Tom Hendrick 6 hours ago in reply to Francis Jiang

TI__Guru**** 172236 points

Hi Francis,

As noted in the Electrical Characteristics table (page 10), the typical reference voltage is 4.096. This coupled with table 3 above gives you the input voltage ranges noted on page 1:

The PGA inside the ADS8684 is not like a traditional PGA where gain is specified in V/V, it is used to simply set the analog input range for the ADC channels.

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ADS8684: Range of Internal PGA