ADS7254: CFR.B7 of ADS7254

Zhihong Huang

Part Number: ADS7254
Other Parts Discussed in Thread: ADS7253,

Hi team,

In the ADS7253, CCFR.B7；CFR.B9 is used to configure the input of the ADC.

However, in the ADS7254, there is no expression about how to configure CCFR.B7, is there any influence of the input range when the CCFR.B7=0 or CCFR.B7=1?

Is the function of the CCFR.B7 in the ADS7254 the same as the CCFR.B7 ADS7253?

Best Regards

Wesley Huang

wesley-huang@ti.com

over 4 years ago

0 Ryan Andrews over 4 years ago

TI__Guru 57306 points

Hello Wesley,

Thank you for your post.

I would not suggest treating the register maps in the ADS7253 and ADS7254 similarly. The ADS7254 only supports fully-differential inputs and bit 7 of the CFR register must always be 0.

Best regards,

0 Zhihong Huang over 4 years ago in reply to Ryan Andrews

TI__Intellectual 1550 points

Hi Ryan ,

Thanks for your reply.

From your opinion, the customer has to set the CFR.B7=0 to let the input mode of the device work as fully-differential inputs.

Do I understand correctly?

Best Regards

Wesley Huang

wesley-huang@ti.com

0 Ryan Andrews over 4 years ago in reply to Zhihong Huang

TI__Guru 57306 points

Hi Wesley,

Yes, CFR.B7 MUST be set to 0 in the ADS7254. This is not optional. Please ask your customer to read the Configuration Register (CFR) description on page 34.

Best regards,

Data converters

Data converters forum

ADS7254: CFR.B7 of ADS7254