Datasheet

 
 
SBAS323G − JUNE 2004 − REVISED OCTOBER 2007
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16
TYPICAL CHARACTERISTICS
AV
DD
= +5V, DV
DD
= +5V, f
OSC
= 8MHz, PGA = 1, f
MOD
= 15.625kHz, Bipolar, filter = Sinc
3
, Buffer ON, and V
REF
≡ (REF IN+) − (REF IN−) = +2.5V, unless otherwise
specified.
EFFECTIVE NUMBER OF BITS vs DATA RATE
23
22
21
20
19
18
17
16
15
14
13
12
11
10
ENOB (rms)
Data Rate (SPS)
1 10 100 1000
Sinc
3
Filter, Buffer OFF
PGA1
PGA8
PGA32
PGA64
PGA128
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)
PGA1
PGA2
PGA16
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
0 500 1000 1500 2000
ENOB (rms)
PGA4
PGA8
PGA1
PGA2
PGA16
PGA32
PGA64
PGA128
Decimation Ratio =
f
MOD
f
DATA
AV
DD
= 3V, 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
PGA16
PGA32
PGA64
PGA128
AV
DD
= 3V, Sinc
3
Filter,
V
REF
= 1.25V, Buffer ON
Decimation Ratio =
f
MOD
f
DATA
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