josephlll
Newbie level 1
sar adc
HI ALL:
I have a sar adc 12bit 200ks/s problem
1.To get resolution of 12 bit, so the comparator of sar adc its gain need 20*log4096=72db
,and to have sample rate=200ks/s, the clock need to set 12*200ks/s=2.4Ms/s.
And there is a question, if the comparator is used opamp, is there a circuit about gain=72db
at frequency=2.4M?
2.Is it correct the Gain bandwidth product=4000*2.4M=9.6G?
3.if it can't use opamp(check the paper, there seem to be nothing in telescope folded opa topology)
,it can only use comparator latch?
thank, if it is false,please correct it
HI ALL:
I have a sar adc 12bit 200ks/s problem
1.To get resolution of 12 bit, so the comparator of sar adc its gain need 20*log4096=72db
,and to have sample rate=200ks/s, the clock need to set 12*200ks/s=2.4Ms/s.
And there is a question, if the comparator is used opamp, is there a circuit about gain=72db
at frequency=2.4M?
2.Is it correct the Gain bandwidth product=4000*2.4M=9.6G?
3.if it can't use opamp(check the paper, there seem to be nothing in telescope folded opa topology)
,it can only use comparator latch?
thank, if it is false,please correct it