Datasheet

 
 
SBAS323G − JUNE 2004 − REVISED OCTOBER 2007
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19
TYPICAL CHARACTERISTICS (Continued)
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.
300
250
200
150
100
50
0
PGA SUPPLY CURRENT
142168 12864
PGA Supply Current (
µ
A)
32
PGA Gain
AV
DD
=5.0V
AV
DD
=3.0V
AV
DD
=DV
DD
f
CLK
=8MHz
V
IN
=0V
NORMALIZED GAIN vs PGA
PGA Setting
Normalized Gain (%)
1421681286432
101
100
99
98
97
96
Buffer ON
Buffer OFF
200
150
100
50
0
HISTOGRAM OF
TEMPERATURE SENSOR VALUES
Temperature Sensor Value (mV)
111.0 111.5 112.0 112.5 113.0 113.5 114.0 114.5 115.0 115.5 116.0 116.5 117.0
Number of Occurrences
10
8
6
4
2
0
−
2
−
4
−
6
−
8
−
10
ADC OFFSET vs TEMPERATURE
(Offset Calibration at +25
_
COnly)
Temperature (
_
C)
−
50 0 25 50 75 100 125 150
−
25
ADC Offset (ppm)
20
15
10
5
0
−
5
−
10
−
15
−
20
OFFSET DAC: OFFSET vs TEMPERATURE
Offset (ppm of FSR)
Temperature (
_
C)
−
40 +25 +125
OFFSET DAC: GAIN vs TEMPERATURE
Normalized Gain
Temperature (
_
C)
−
40 +25
1.00008
1.00006
1.00004
1.00002
1
0.99998
0.99996
0.99994
0.99992
+125