# https://ez.analog.com/data_converters/precision_adcs/w/documents/2936/ad7892-overvoltage-protection information seems uncorrect

Theme of this topic is AD7892 and specification and answer is correct for AD7892-3 but not for AD7893-2  like it is specified in the question and answer. Because AD7893-2 datasheet specifies possibility of the -5 and 10 V on the Analog Input. Could you please clarify.

Parents
• All,

The -2 model only has an input range of 0 to 2.5V.   IF you want to use the 10V range you'll need to use the -10 model.  Thus the Q&A is correct.

Sean

• Hi Sean,

I think the customer is also looking at the abs max rating written in the datasheet. Can you help us clarify this please and see if there’s some necessary corrections on DS?

Thanks,

Jellenie

• Jellenie,

The Input Voltage Range in question of 0V to 2.5V applies to both AD7892-2 and AD7893-2. It does not apply to the AD7892-3 which has been mentioned in the post above.

The Absolute Maximum Input Voltage rating is different between the AD7892-2 and AD7893-2. The AD7893-2 is rated to +10V to -5V, and this is correctly described in the linked Q&A.

Hence the linked Q&A is definitely about the AD7893-2.

I think the confusion is that the title mentions "AD7892" instead of "AD7893." I think the title should be updated to "AD7893-2: Analog Input Range Specifications" to more accurately reflect what is being described.

Thanks,

Tyler

Reply
• Jellenie,

The Input Voltage Range in question of 0V to 2.5V applies to both AD7892-2 and AD7893-2. It does not apply to the AD7892-3 which has been mentioned in the post above.

The Absolute Maximum Input Voltage rating is different between the AD7892-2 and AD7893-2. The AD7893-2 is rated to +10V to -5V, and this is correctly described in the linked Q&A.

Hence the linked Q&A is definitely about the AD7893-2.

I think the confusion is that the title mentions "AD7892" instead of "AD7893." I think the title should be updated to "AD7893-2: Analog Input Range Specifications" to more accurately reflect what is being described.

Thanks,

Tyler

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