Datasheet

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TYPICAL CHARACTERISTICS ADS7888
49
49.1
49.2
49.3
49.4
49.5
49.6
49.7
49.8
49.9
50
1 10 100 1000
SINAD − Signal-to-Noise and Distortion − dB
f
i
− Input Frequency − kHz
f
s
= 1.25 MSPS,
T
A
= 25C,
V
DD
= 5 V
49
49.1
49.2
49.3
49.4
49.5
49.6
49.7
49.8
49.9
50
2.35 3.075 3.8 4.525 5.25
SINAD − Signal-to-Noise and Distortion − dB
f
s
= 1.25 MSPS,
f
i
= 100 kHz,
T
A
= 25C
V
DD
− Supply Voltage − V
−70
−69.5
−69
−68.5
−68
−67.5
−67
−66.5
−66
−65.5
−65
1 10 100
THD − Total Harmonic Distortion − dB
V
DD
= 5 V,
f
s
= 1.25 MSPS,
T
A
= 25C
f
i
− Input Frequency − kHz
−70
−69.5
−69
−68.5
−68
−67.5
−67
−66.5
−66
−65.5
−65
2.35 3.075 3.8 4.525 5.25
THD − Total Harmonic Distortion − dB
V
DD
− Supply Voltage − V
f
i
= 100 kHz,
f
s
= 1.25 MSPS,
T
A
= 25C
75
76
77
78
79
80
81
82
83
84
85
2.35 3.075 3.8 4.525 5.25
SFDR − Spurious Free Dynamic Range − dB
V
DD
− Supply Voltage − V
f
i
= 100 kHz,
f
s
= 1.25 MSPS,
T
A
= 25C
75
75.5
76
76.5
77
77.5
78
78.5
79
79.5
80
1 10 100
SFDR − Spurious Free Dynamic Range − dB
V
DD
= 5 V,
f
s
= 1.25 MSPS,
T
A
= 25C
f
i
− Input Frequency − kHz
−0.3
−0.2
−0.1
0
0.1
0.2
0.3
2.35 3.075 3.8 4.525 5.25
E
G
− Gain Error − LSBs
f
s
= 1.25 MSPS,
T
A
= 25C
V
DD
− Supply Voltage − V
−0.3
−0.2
−0.1
0
0.1
0.2
0.3
2.35 3.075 3.8 4.525 5.25
E
O
− Offset Error − LSBs
f
s
= 1.25 MSPS,
T
A
= 25C
V
DD
− Supply Voltage − V
−0.3
−0.2
−0.1
0
0.1
0.2
0.3
−40 −7 26 59 92 125
E
O
− Offset Error − LSBs
f
s
= 1.25 MSPS,
V
DD
= 5 V
T
A
− Free-Air Temperature − °C
ADS7887
ADS7888
SLAS468 – JUNE 2005
SIGNAL-TO-NOISE SIGNAL-TO-NOISE TOTAL HARMONIC DISTORTION
AND DISTORTION AND DISTORTION vs
vs vs INPUT FREQUENCY
INPUT FREQUENCY SUPPLY VOLTAGE
Figure 23. Figure 24. Figure 25.
TOTAL HARMONIC DISTORTION SPURIOUS FREE DYNAMIC RANGE SPURIOUS FREE DYNAMIC RANGE
vs vs vs
SUPPLY VOLTAGE INPUT FREQUENCY SUPPLY VOLTAGE
Figure 26. Figure 27. Figure 28.
OFFSET ERROR OFFSET ERROR GAIN ERROR
vs vs vs
SUPPLY VOLTAGE FREE-AIR TEMPERATURE SUPPLY VOLTAGE
Figure 29. Figure 30. Figure 31.
15