ADS8028 Datasheet, PDF (11/34 Pages) Texas Instruments – 12-Bit, 1-MSPS, 8-Channel, SAR ADC

ADS8028
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SBAS549B – MAY 2011 – REVISED MARCH 2012
TYPICAL CHARACTERISTICS (continued)
All plots at T_A = +25°C, AVDD = 3.0 V, DVDD = 3.0 V,
f_SAMPLE = 1 MHz, f_SCLK = 20 MHz, and V_REF = 2.5 V internal, unless otherwise noted.
INL vs TEMPERATURE
OFFSET ERROR vs TEMPERATURE
1
4
0.8
0.6
0.4
Maximum INL
2
0.2
0
0
−0.2
Minimum INL
−0.4
−2
−0.6
−0.8
−1
−40 −15
10
35
60
85
Free− Air Temperature (dB)
Figure 20.
110 125
G022
−4
−40 −15
10
35
60
85
Free−Air Temperature (°C)
Figure 21.
110 125
G024
GAIN ERROR vs TEMPERATURE
4
SINAD vs AVDD
75
2
0
−2
−4
−40 −15
10
35
60
85
Free−Air Temperature (°C)
Figure 22.
110 125
G025
72
69
66
63
DVDD = 1.8 V
60
2.7
3.2
3.7
4.2
4.7
AVDD, Analog Supply Voltage (V)
5.2
G026
Figure 23.
DNL vs AVDD
1
0.8
0.6
Maximum DNL
0.4
0.2
0
−0.2
Minimum DNL
−0.4
−0.6
−0.8
−1
2.7
3.2
3.7
4.2
4.7
5.2
AVDD, Analog Supply Voltage (V)
Figure 24.
5.7
G027
INL vs AVDD
1
0.8
0.6
0.4
Maximum INL
0.2
0
−0.2
Minimum INL
−0.4
−0.6
−0.8 ^{DVDD = 1.8 V}
−1
2.7
3.2
3.7
4.2
4.7
AVDD, Analog Supply Voltage (V)
5.2
G028
Figure 25.
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