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| ADS8484 Datasheet, PDF (12/32 Pages) Texas Instruments – 18-BIT, 1.25-MSPS, PSEUDO-BIPOLAR, FULLY DIFFERENTIAL INPUT, MICROPOWER SAMPLING ANALOG-TO-DIGITAL CONVERTER WITH PARALLEL INTERFACE,REFERENCE | |||
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ADS8484
SLAS511 â NOVEMBER 2007
TYPICAL CHARACTERISTICS (continued)
www.ti.com
SIGNAL-TO-NOISE RATIO
vs
REFERENCE VOLTAGE
99
98.5
98
+VA = 5 V,
+VBD = 5 V,
fs = 1.25 MSPS,
TA = 25°C,
fi = 2 kHz
SIGNAL-TO-NOISE + DISTORTION
vs
REFERENCE VOLTAGE
99
98.5
98
+VA = 5 V,
+VBD = 5 V,
fs = 1.25 MSPS,
TA = 25°C,
fi = 2 kHz
97.5
97.5
97
97
96.5
96.5
96
3 3.2 3.4 3.6 3.8 4 4.2
Vref - Reference Voltage - V
Figure 22.
96
3 3.2 3.4 3.6 3.8 4 4.2
Vref - Reference Voltage - V
Figure 23.
SPURIOUS FREE DYNAMIC RANGE
vs
FREE-AIR TEMPERATURE
123.5
123
122.5
122
+VA = 5 V,
+VBD = 5 V,
fs = 1.25 MSPS,
Vref = 4.096 V,
fi = 2 kHz
121.5
121
120.5
SIGNAL-TO-NOISE RATIO
vs
FREE-AIR TEMPERATURE
98.8
98.7
98.6
+VA = 5 V,
+VBD = 5 V,
fs = 1.25 MSPS,
Vref = 4.096 V,
fi = 2 kHz
98.5
98.4
120
98.3
119.5
119
98.2
118.5
-40
-25 -10 5 20 35 50 65 80
98.1
-40 -25 -10 5 20 35 50 65 80
TA - Free-Air Temperature - °C
TA - Free-Air Temperature - °C
Figure 25.
Figure 26.
DNL
1.5
+VA = 5 V, +VBD = 5 V, TA = 25°C, fs = 1.25 MSPS, Vref = 4.096 V
1
0.5
0
-0.5
TOTAL HARMONIC DISTORTION
vs
FREE-AIR TEMPERATURE
-115
-116
-117
+VA = 5 V,
+VBD = 5 V,
fs = 1.25 MSPS,
Vref = 4.096 V,
fi = 2 kHz
-118
-119
-120
-121
-122
-40 -25 -10 5 20 35 50 65 80
TA - Free-Air Temperature - °C
Figure 24.
SIGNAL-TO-NOISE + DISTORTION
vs
FREE-AIR TEMPERATURE
98.8
98.7
98.6
98.5
+VA = 5 V,
+VBD = 5 V,
fs = 1.25 MSPS,
Vref = 4.096 V,
fi = 2 kHz
98.4
98.3
98.2
98.1
-40
-25 -10 5 20 35 50 65 80
TA - Free-Air Temperature - °C
Figure 27.
-1
-1.5
-131072
-65536
0
Output Code
Figure 28.
65536
131072
12
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Copyright © 2007, Texas Instruments Incorporated
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