Other Parts Discussed in Thread: ADS1271, ADS1274
Hello,
In the datasheet of the ADS127L01 there is a remark for following pins:
12 FILTER1
13 FILTER0
14 FSMODE
15 OSR1
16 OSR0
29 HR
30 FORMAT
(2) Pull the hardware mode pins high to DVDD or low to DGND through 100-kΩ resistors.
In the evaluation board it is possible to connect these inputs to logic outputs of other components.
So there is no 100kOhm resistor in series for that application.
My questions are:
Why are these 100kOhm resistors necessary?
Is it allowed to connect these inputs directly to DVDD or DGND for defining logical levels?
According to the absolute maximum ratings the direct connection of these logic inputs to DVDD or GND is no problem.
Also according the recommended operation conditions the direct connection of these logic inputs to DVDD or GND is no problem.
Best regards
Kaufmann Friedrich