KarenNEthank you for your respnose! But there some difference in timing diagrams between AD7949 and AD7682.
Here timing for AD7682:
Here timing for AD7949:
I don't understand: Can I write to AD7949 the same way as in AD7682?
Need one confirmation for AD7949, is the exposed pad MUST be soldered? Customer would like to skip this soldering during prototype, is it ok?
Refer to page 9
21 (EPAD) Exposed Pad (EPAD) NC The exposed pad is not connected internally. For increased…
I have a question here. I am currently using the AD7949 adc chip and interfacing with my FPGA. I would like to know what is the Rise time and Fall time for this AD7949 chip. I am unable to find it on the data sheet.
The AD8237 will have the same problem driving the AD7949 that it would driving the LTC1867. AD7949 will also produce glitches at the analog input that the AD8237 will be very slow to recover from.
Your schematic doesn't make sense to me. You…
The AD7949 datasheet shows several SPI timing diagrams labeled as RDC, RAC, RSC. Can anybody tell me what these abbreviations mean? Thanks - George
Question3 resolved from previous issues... V_temp = (Adc Value * V_ref) / (16384) for 14 bit AD7949.
The AD7949 is SPI compatible device. Although the AD7949 does not use the conventional CS pin which is most of the time driven by a logic low digital signal to initiate a conversion. The AD7949 uses rising edge of CNV to initiate conversion…
Page 22 of the data sheet (Rev F) states: "However, due to the possibility of performance degradation, digital activity should occur only prior to the safe data reading/ writing time, tDATA, because the AD7949 provides error correction…
I would like to try to make a temperature measurement on the AD7949 when configured with external REF. I have configured the following -
CFG register bits
INCC = Temperature sensor. [12:10] = ‘011’.
REF = External reference, temperature enabled…