LTC2446 Datasheet, PDF (13/28 Pages) Linear Technology – 24-Bit High Speed 8-Channel ΔΣ ADCs with Selectable Multiple Reference Inputs

LTC2446/LTC2447
APPLICATIO S I FOR ATIO
Table 4. LTC2446/LTC2447 Speed/Resolution Selection
CONVERSION RATE
INTERNAL EXTERNAL RMS RMS
9MHz 10.24MHz NOISE NOISE ENOB ENOB
OSR3 OSR2 OSR1 OSR0 TWOX CLOCK CLOCK LTC2446 LTC2447 LTC2446 LTC2447 OSR
0
0
0
0
0
Keep Previous Speed/Resolution
0
0
0
1
0 3.52kHz 4kHz
23µV 23µV
17
17
64
0
0
1
0
0 1.76kHz 2kHz
4.4µV 3.5µV 20.1
20.1 128
0
0
1
1
0
880Hz 1kHz
2.8µV 2µV
20.8
21.3 256
0
1
0
0
0
440Hz 500Hz
2µV 1.4µV 21.3
21.8 512
0
1
0
1
0
220Hz 250Hz 1.4µV 1µV
21.8
22.4 1024
0
1
1
0
0
110Hz 125Hz 1.1µV 750nV 22.1
22.9 2048
0
1
1
1
0
55Hz 62.5Hz 720nV 510nV 22.7
23.4 4096
1
0
0
0
0 27.5Hz 31.25Hz 530nV 375nV 23.2
24 8192
1
0
0
1
0 13.75Hz 15.625Hz 350nV 250nV 23.8
24.4 16384
1
1
1
1
0 6.875Hz 7.8125Hz 280nV 200nV 24.1
24.6 32768
0
0
0
0
1
Keep Previous Speed/Resolution
0
0
0
1
1 7.04kHz 8kHz
23µV 23µV
17
17
64
0
0
1
0
1 3.52kHz 4kHz
4.4µV 3.5µV 20.1
20.1 128
0
0
1
1
1 1.76kHz 2kHz 2.8µV 2µV
20.8
21.3 256
0
1
0
0
1
880Hz 1kHz
2µV 1.4µV 21.3
21.8 512
0
1
0
1
1
440Hz 500Hz 1.4µV 1µV
21.8
22.4 1024
0
1
1
0
1
220Hz 250Hz 1.1µV 750nV 22.1
22.9 2048
0
1
1
1
1
110Hz 125Hz 720nV 510nV 22.7
23.4 4096
1
0
0
0
1
55Hz 62.5Hz 530nV 375nV 23.2
24 8192
1
0
0
1
1
27.5Hz 31.25Hz 350nV 250nV 23.8
24.4 16384
1
1
1
1
1 13.75Hz 15.625Hz 280nV 200nV 24.1
24.6 32768
LATENCY
None
None
None
None
None
None
None
None
None
none
1 Cycle
1 Cycle
1 Cycle
1 Cycle
1 Cycle
1 Cycle
1 Cycle
1 Cycle
1 Cycle
1 Cycle
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