AMC7823 Datasheet, PDF (14/48 Pages) Texas Instruments – ANALOG MONITORING AND CONTROL CIRCUIT

AMC7823
SLAS453A – APRIL 2005 – REVISED OCTOBER 2005
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TYPICAL CHARACTERISTICS: ANALOG-TO-DIGITAL CONVERTER (ADC) (continued)
At +25°C, AV_DD = DV_DD = 5V, unless otherwise noted.
GAIN AND OFFSET ERROR
vs 3V SUPPLY
12.0
V_REF = 1.25V
8.0
Gain
4.0
0
−4.0
−8.0
Offset
GAIN AND OFFSET ERROR MATCH
vs 3V SUPPLY
1.0
V_REF = 1.25V
0.8
Gain Match
0.6
0.4
Offset Match
0.2
−12.0
2.7
2.85
3.0
3.15
3.3
3V Supply Voltage (V)
Figure 15.
0
2.7
2.85
3.0
3.15
3.3
3V Supply Voltage (V)
Figure 16.
2.5004
2.5002
2.5000
2.4998
2.4996
2.4994
2.4992
2.4990
2.5
INTERNAL REFERENCES
vs AV_DD VOLTAGE
2.5V_REF
1.25V_REF
3.0
3.5
4.0
4.5
5.0
AV_DD Voltage (V)
Figure 17.
1.2504
1.2502
1.2500
1.2498
1.2496
1.2494
1.2492
1.2490
5.5
2.5V AND 1.25V INTERNAL REFERENCES
vs TEMPERATURE
1.0
AV_DD = 5V or 3V
0.5
0
−0.5
−1.0
1.25V_REF
−1.5
−2.0
2.5V_REF
−2.5
−3.0
−3.5
−4.0
−60 −40 −20 0 20 40 60 80 100
Temperature (_C)
Figure 18.
INTERNAL 2.5V REFERENCE
(AV_DD = 5V)
25
INTERNAL 1.25V REFERENCE
(AV_DD = 2.7V)
60
20
50
40
15
30
10
20
5
10
0
Histogram Bins (V)
Figure 19.
0
1.247 1.248 1.249 1.250 1.251 1.252 1.253
Histogram Bins (V)
Figure 20.
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