Datasheet

ADS1217
8
SBAS260C
www.ti.com
TYPICAL CHARACTERISTICS
AV
DD
= +5V, DV
DD
= +5V, f
OSC
= 2.4576MHz, PGA = 1, R
DAC
= 150kΩ, f
DATA
= 10Hz, and V
REF
= +2.5V, unless otherwise specified.
22
21
20
19
18
17
16
15
14
13
12
EFFECTIVE NUMBER OF BITS
vs DECIMATION RATIO
0 500 1000 1500 2000
ENOB (rms)
PGA4
PGA8
PGA1
PGA2
PGA16
PGA32
PGA64
PGA128
Decimation Ratio =
f
MOD
f
DATA
Sinc
3
Filter, V
REF
= 1.25V, BUFFER OFF
22
21
20
19
18
17
16
15
14
13
12
EFFECTIVE NUMBER OF BITS
vs DECIMATION RATIO
0 500 1000 1500 2000
ENOB (rms)
PGA4
PGA8
PGA1
PGA2
PGA32
PGA128
PGA16 PGA64
Decimation Ratio =
f
MOD
f
DATA
Sinc
2
Filter
22
21
20
19
18
17
16
15
14
13
12
FAST SETTLING FILTER
EFFECTIVE NUMBER OF BITS vs DECIMATION RATIO
0 500 1000 1500 2000
ENOB (rms)
1500
Decimation Ratio =
f
MOD
f
DATA
Fast Settling Filter
22
21
20
19
18
17
16
15
14
13
12
EFFECTIVE NUMBER OF BITS
vs DECIMATION RATIO
Decimation Ratio =
f
MOD
f
DATA
0 500 1000 1500 2000
PGA4
ENOB (rms)
PGA2
PGA16
PGA1
PGA8
PGA32
PGA64
PGA128
Sinc
3
Filter, BUFFER OFF
22
21
20
19
18
17
16
15
14
13
12
EFFECTIVE NUMBER OF BITS
vs DECIMATION RATIO
0 500 1000 1500 2000
ENOB (rms)
PGA4
PGA8
PGA1
PGA2
PGA16
PGA32
PGA64
PGA128
Decimation Ratio =
f
MOD
f
DATA
Sinc
3
Filter, BUFFER ON
22
21
20
19
18
17
16
15
14
13
12
EFFECTIVE NUMBER OF BITS
vs DECIMATION RATIO
Decimation Ratio
0 500 1000 1500 2000
ENOB (rms)
PGA4
PGA8
PGA1
PGA2
PGA16
PGA32
PGA64
PGA128
Sinc
3
Filter, V
REF
= 1.25V, BUFFER ON