Part Number: ADS54J69
Other Parts Discussed in Thread: ADS54J40, ADS54J66
Tool/software:
I am looking for more documentation about the Interleaving Correction and the ADC Digital Gain unit for the ADS54J69.
We run into gain variation problems, when we initialize the JESD204B bus new. It happens sometimes, that one or both ADC channels show different gain after the initialization.
If we repeat it a couple times, it is possible to get to the original values back again, but more on coincidence.
Are there some registers we can manually setup to correct this behavior?
The ADC ADS54J66 and ADS54J40 have some registers documented for that in the data sheet (e.g.):
ADS54J40:
6800h,F7h : DIG RESET
6100h,68h : REEZE CORR | DC OFFSET CORR BW | DC OFFSET CORR BW | DC OFFSET CORR BW | DC OFFSET CORR BW | BYPASS CORR | ALWAYS WRITE 1 | 0
OFFSET READ PAGE (PAGE SEL1 = 0000h)
6100h,74h: ADC0_CORR_INT_EST
6100h,76h: ADC1_CORR_INT_EST
6100h,78h: ADC2_CORR_INT_EST
6100h,7Ah: ADC3_CORR_INT_EST
6100h,78h: IL ENGINE FREEZE SECONDARY CONTROL (Bit 0)
OFFSET LOAD PAGE (PAGE SEL1 = 0500h)
6100h,00h: ADC0_LOAD_INT_EST
6100h,04h: ADC1_LOAD_INT_EST
6100h,08h: ADC2_LOAD_INT_EST
6100h,0Ch: ADC3_LOAD_INT_EST
ADS54J66:
6100h,18h : IL BYPASS, 0b11
6100h,68h : 0 | DC CORR DIS, 0b11 | 0
