Tool/software:
Hi TI experts,
The AFE58JD48 can pre-store up to four analog gains, i.e. TGC_PROFILE[3:0], which can be pin-selected to enable a certain TGC_PROFILE, how do I implement DTGC with the help of this function?
Here is my current scenario, by default, the DTGC curve has only four segments, and I want more segments of the DTGC curve, so I am going to update the TGC_PROFILE in real time during the sampling of the AFE, for example, update TGC_PROFILE1 with SPI when TGC_PROFILE0 is in effect, and then use the pin to switch to TGC_ PROFILE1, and then use SPI to update TGC_PROFILE0 afterward, and so on. Depending on the maximum rate of the SPI interface, I can go up to 800kHz DTGC.
The question now is:
- Is this the recommended DTGC solution for AFE58JD48? and if not, how do I get more than 4 segments of DTGC curves?
- Will updating the TGC_PROFILE register, which is not in effect, during ADC sampling cause disturbance to the AD conversion?
Best Regards
Gaofeng
