Datasheet
www.ti.com
TYPICAL CHARACTERISTICS ADS7887
60.5
60.7
60.9
61.1
61.3
61.5
61.7
61.9
1 10 100 1000
f
i
− Input Frequency − kHz
SINAD − Signal-to-Noise and Distortion − dB
f
s
= 1.25 MSPS,
T
A
= 25C,
V
DD
= 5 V
61
61.1
61.2
61.3
61.4
61.5
61.6
61.7
61.8
61.9
62
2.35 3.075 3.8 4.525 5.25
f
s
= 1.25 MSPS,
f
i
= 100 kHz,
T
A
= 25C
SINAD − Signal-to-Noise and Distortion − dB
V
DD
− Supply Voltage − V
−90
−89
−88
−87
−86
−85
−84
−83
−82
−81
−80
1 10 100
f
i
− Input Frequency − kHz
f
s
= 1.25 MSPS,
T
A
= 25C,
V
DD
= 5 V
THD − Total Harmonic Distortion − dB
80
80.5
81
81.5
82
82.5
83
83.5
84
84.5
85
2.35 3.075
3.8
4.525 5.25
SFDR − Spurious Free Dynamic Range − dB
f
s
= 1.25 MSPS,
f
i
= 100 kHz,
T
A
= 25C
V
DD
− Supply Voltage − V
−90
−89
−88
−87
−86
−85
−84
−83
−82
−81
−80
2.35 3.075 3.8 4.525 5.25
f
s
= 1.25 MSPS,
f
i
= 100 kHz,
T
A
= 25C
THD − Total Harmonic Distortion − dB
V
DD
− Supply Voltage − V
80
80.5
81
81.5
82
82.5
83
83.5
84
84.5
85
1
10 100
SFDR − Spurious Free Dynamic Range − dB
f
i
− Input Frequency − kHz
f
s
= 1.25 MSPS,
T
A
= 25C,
V
DD
= 5 V
−1
−0.8
−0.6
−0.4
−0.2
0
0.2
0.4
0.6
0.8
1
2.35 3.075 3.8 4.525 5.25
E
O
− Offset Error − LSBs
f
s
= 1.25 MSPS,
T
A
= 25C
V
DD
− Supply Voltage − V
−1
−0.8
−0.6
−0.4
−0.2
0
0.2
0.4
0.6
0.8
1
2.35 3.075 3.8 4.525 5.25
E
G
− Gain Error − LSBs
f
s
= 1.25 MSPS,
T
A
= 25C
V
DD
− Supply Voltage − V
−1
−0.8
−0.6
−0.4
−0.2
0
0.2
0.4
0.6
0.8
1
−40 −20 0 20 40 60 80 100 120
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 10. Figure 11. Figure 12.
TOTAL HARMONIC DISTORTION SPURIOUS FREE DYNAMIC RANGE SPURIOUS FREE DYNAMIC RANGE
vs vs vs
SUPPLY VOLTAGE INPUT FREQUENCY SUPPLY VOLTAGE
Figure 13. Figure 14. Figure 15.
OFFSET ERROR OFFSET ERROR GAIN ERROR
vs vs vs
SUPPLY VOLTAGE FREE-AIR TEMPERATURE SUPPLY VOLTAGE
Figure 16. Figure 17. Figure 18.
12