| ??? 03/10/08 07:54 Read: times |
#152054 - Many possible reasons, but ... Responding to: ???'s previous message |
While reading ADC, there is a significant flucuation in the reading.
First of all, what is meant by "significant" ? How many LSB ? Can you check the ADC input with a scope ? Are the supply voltages clean ? Is the reference voltage clean ? I am using internal voltage reference 2.5V. According to the datasheet of the AD 7998:: The AD7997/AD7998 require an external reference that should be applied to the REFIN pin and can be in the range of 1.2 V to VDD. The datasheet doesn't seem to mention an internal reference. |
| Topic | Author | Date |
| Problem with 89C668 I2C ADC reading | 01/01/70 00:00 | |
| Many possible reasons, but ... | 01/01/70 00:00 | |
| Many, many reasons! | 01/01/70 00:00 | |
| did you read | 01/01/70 00:00 | |
Thanks Eric | 01/01/70 00:00 |