Datasheet

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SBAS317E − APRIL 2004 − REVISED MAY 2006
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15
TYPICAL CHARACTERISTICS: ALL DEVICES
AV
DD
= +5V, DV
DD
= +5V, f
OSC
= 8MHz, PGA = 1, f
MOD
= 15.625kHz, ADC Bipolar Mode, Buffer ON, and V
REF
≡ (REF IN+) − (REF IN−) = +2.5V, unless
otherwise specified.
15
10
5
0
−
5
−
10
−
15
ADC INTEGRAL NONLINEARITY
vs INPUT VOLTAGE
ADC Input Voltage (V)
−
2.5
−
1.0
−
0.5 1.00.5 2.0 2.5
−
1.5
−
2.0 0 1.5
ADC INL (ppm)
+125
_
C
+85
_
C
+25
_
C
−
55
_
C
−
40
_
C
AV
DD
=5V
V
REF
=2.5V
Buffer ON
15
10
5
0
−
5
−
10
−
15
ADC INTEGRAL NONLINEARITY
vs INPUT VOLTAGE
ADC Input Voltage (V)
−
2.5
−
1.0
−
0.5 1.00.5 2.0 2.5
−
1.5
−
2.0 0 1.5
ADC INL (ppm)
+85
_
C
+25
_
C
−
40
_
C
AV
DD
=5V
V
REF
=2.5V
Buffer OFF
15
10
5
0
−
5
−
10
−
15
ADC INTEGRAL NONLINEARITY
vs INPUT SIGNAL
V
IN
(V)
V
IN
=
−
V
REF
0V
IN
=+V
REF
INL (ppm of FS)
V
REF
=AV
DD
=5V
Buffer OFF
30
25
20
15
10
5
0
ADC INTEGRAL NONLINEARITY
vs V
REF
V
REF
(V)
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
INL (ppm of FS)
V
IN
=V
REF
Buffer OFF
AV
DD
=3V
AV
DD
=5V
ADC INTEGRAL NONLINEARITY ERROR
vs PGA
PGA Setting
INL (ppm of FS)
1421681286432
50
45
40
35
30
25
20
15
10
5
0
AV
DD
=5V
V
REF
=2.5V
15
10
5
0
−
5
−
10
−
15
ADC OFFSET vs TEMPERATURE
(Offset Calibration at 25
_
COnly)
Temperature (
_
C)
−
60 0 20 8060 120 140
−
20
−
40 40 100
ADC Offset (ppm)
AV
DD
=5V
AV
DD
=3V