ADS7950_15 Datasheet, PDF (22/70 Pages) Texas Instruments – Single-Ended, MicroPower, Serial Interface ADCs

ADS7950, ADS7951, ADS7952, ADS7953, ADS7954, ADS7955
ADS7956, ADS7957, ADS7958, ADS7959, ADS7960, ADS7961
SLAS605B – JUNE 2008 – REVISED JULY 2015
www.ti.com
Typical Characteristics (12-Bit Devices Only) (continued)
Variations for 10-bit and 8-bit devices are too small to be illustrated through the characteristic curves
73
73
+VA = 5 V
72.5
72.5
+VBD = 3 V,
f_S = 1 MSPS,
72
72
T_A = 25°C,
MXO Shorted to AINP
71.5
71.5
71
71
70.5
70
69.5
69
10
+VA = 5 V
+VBD = 3 V,
f_S = 1 MSPS,
T_A = 25°C,
MXO Shorted to AINP
30 50 70 90 110 130 150
f_IN - Input Frequency - KHz
70.5
70
69.5
69
10
30 50 70 90 110 130 150
f_IN - Input Frequency - KHz
Figure 29. Signal-to-Noise Ratio vs Input Frequency
-70
-72 ^{+VA = 5 V}
+VBD = 3 V,
-74 ^fS ^{= 1 MSPS,}
T_A = 25°C,
-76 _{MXO Shorted to AINP}
-78
-80
-82
-84
-86
-88
-90
10
30 50 70 90 110 130 150
f_IN - Input Frequency - KHz
Figure 30. Signal-to-Noise + Distortion vs Input Frequency
100
+VA = 5 V
+VBD = 3 V,
95
f_S = 1 MSPS,
T_A = 25°C,
90
MXO Shorted to AINP
85
80
75
70
10
30 50 70 90 110 130 150
f_IN - Input Frequency - KHz
Figure 31. Total Harmonic Distortion vs Input Frequency
72
500 W
71.5
71
10 W _{100 W}
70.5
1000 W
70
69.5
69
20
+VA = 5 V
+VBD = 5 V,
f_S = 1 MSPS,
T_A = 25°C,
Buffer Between MXO and AINP
40
60
80
100
f_IN - Input Frequency - KHz
Figure 33. Signal-to-Noise + Distortion vs Input Frequency
(Across Different Source Resistance Values)
Figure 32. Spurious Free Dynamic Range vs Input
Frequency
-70
+VA = 5 V
-72 _{+VBD = 5 V,}
-74
f_S = 1 MSPS,
T_A = 25°C,
-76 ^{Buffer Between MXO and AINP}
-78
1000 W
500 W
-80
-82
-84
10 W
100 W
-86
-88
-90
20
40
60
80
100
f_IN - Input Frequency - KHz
Figure 34. Total Harmonic Distortion vs Input Frequency
(Across Different Source Resistance Values)
22
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