AMC7891_14 Datasheet, PDF (13/42 Pages) Texas Instruments – Analog Monitor and Control Circuit with 10-Bit, Multi-Channel ADC and Four DACs, Temperature Sensor, and 12 GPIOs

AMC7891
www.ti.com
SBAS518A – AUGUST 2011 – REVISED DECEMBER 2011
TYPICAL CHARACTERISTICS: ADC (continued)
AV_DD = 5 V, GPIOV_DD = 5 V, SPIV_DD = 5 V, AGND = DGND = 0 V, External ADC reference = AV_DD
(unless otherwise noted)
2.000
2.000
1.500
1.500
1.000
1.000
0.500
0.500
0.000
0.000
−0.500
−0.500
−1.000
−1.000
−1.500
AV_DD = 5 V
−2.000
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
External ADC Vref (V)
G019
Figure 18. ADC OFFSET ERROR vs. REFERENCE
VOLTAGE
−1.500
AV_DD = 5 V
−2.000
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
External ADC Vref (V)
G020
Figure 19. ADC GAIN ERROR vs. REFERENCE VOLTAGE
2.505
2.504
2.503
2.502
2.501
2.500
2.499
2.498
2.497
2.496
2.495
2.5
3.0
3.5
4.0
4.5
5.0
5.5
AVDD (V)
G021
Figure 20. ADC INTERNAL REFERENCE vs. AVDD
2.505
2.504
2.503
2.502
2.501
2.500
2.499
2.498
2.497
2.496
2.495
−40 −20 0
15 units
20 40 60 80 100 120
Temperature (°C)
G022
Figure 21. ADC INTERNAL REFERENCE vs.
TEMPERATURE
2.5
2.0
1.5
1.0
0.5
0.0
−0.5
−1.0
−1.5
−2.0
15 units
−2.5
−40 −20 0
20 40 60 80 100 120
Temperature (°C)
G000
Figure 22. TEMPERATURE SENSOR ERROR vs TEMPERATURE
Copyright © 2011, Texas Instruments Incorporated
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