Hi ,

Sorry bother you guys again, I have some questions about the AD7765 datasheet .

1. On AD7765 datasheet Page 13,  Figure 18,  the "Normal Power Mode INL" picture, it use the percentage "%"  as the unit for the INL, normally we will use LSB as the unit for INL,  How to convert this percentage value to LSB value?   Is equation below correct?
1.  INL LSB = percentage x FS / (Voltage per LSB)
2. The AD775 contains an on-board differential amplifier, and the datasheet recommended us to use this amplifier to drive the ADC ,  I want to know the parameters or the specification in the datasheet was measured with the amplifier,  or without the amplifier?

Thanks for help.

• Hi,

Apologies for any inconvenience caused. ADI Offices are closed for end of year shutdown from the 24th December 2020 until the 1st January 2021 inclusive. We'll try to contact the product owner and get back to you.

Thanks,

Jellenie

• Hi,

Apologies for the delay. Haven't got a chance to contact the owner however, I've checked the questions and see my response below.

1. Yes that seems correct.

2. The parameters in the datasheet was measured using the on-chip amplifier with components as shown in the Optimal row in Table 10, unless otherwise noted.1. which was also mentioned in the datasheet.

Thanks,

Jellenie

• Hi Jellenie,

Nice, thanks for the clarification.