ADS8331_15 Datasheet, PDF (13/57 Pages) Texas Instruments – Low-Power, 16-Bit, 500-kSPS, 4-/8-Channel Unipolar Input Analog-to-Digital Converters

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ADS8331, ADS8332
SBAS363D – DECEMBER 2009 – REVISED OCTOBER 2015
7.9 Typical Characteristics - DC Performance
At T_A = 25°C, V_REF (REF+ – REF–) = 4.096 V when VA = VBD = 5 V or V_REF (REF+ – REF–) = 2.5 V when VA = VBD = 2.7
V, f_SCLK = 21 MHz, and f_SAMPLE = 500 kSPS, unless otherwise noted.
3
2
1
0
-1
-2
-3
0000h
VA = VBD = 2.7V
V_REF = 2.500V
4000h
8000h
Output Code
C000h
FFFFh
3
2
1
0
-1
-2
-3
0000h
VA = VBD = 5.0V
V_REF = 4.096V
4000h
8000h
Output Code
C000h
FFFFh
Figure 5. Integral Linearity Error vs Code
3
VA = VBD = 2.7V
2
V_REF = 2.500V
1
0
-1
-2
-3
0000h
4000h
8000h
Output Code
C000h
FFFFh
Figure 6. Integral Linearity Error vs Code
3
VA = VBD = 5.0V
2
V_REF = 4.096V
1
0
-1
-2
-3
0000h
4000h
8000h
Output Code
C000h
FFFFh
Figure 7. Differential Linearity Error vs Code
8.0
7.5
V_REF = 4.096V
7.0
6.5
V_REF = 2.500V
6.0
5.5
5.0
4.5
4.0
VA (V)
Figure 8. Differential Linearity Error vs Code
500
450
V_REF = 2.500V
400
V_REF = 4.096V
350
300
VA (V)
Figure 9. Analog Supply Current vs Analog Supply Voltage
Figure 10. Analog Supply Current in NAP Mode vs
Analog Supply Voltage
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