LTC2487 Linear Technology, LTC2487 Datasheet - Page 26

• Manufacturer Part Number: LTC2487
• Description: 16-Bit 2-/4-Channel ADC
• Manufacturer: Linear Technology

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LTC2487
applicaTions inForMaTion

Figure 19. Input Normal Mode Rejection at DC
–100
–110
–120
–10
–20
–30
–40
–50
–60
–70
–80
–90
0
0
f
N
INPUT SIGNAL FREQUENCY (Hz)
2f
N
3f
N
–100
–120
–100
–120
– 60
– 60
–20
–40
–80
–20
–40
–80
4f
0
0
N
0
0
Figure 21. Input Normal Mode Rejection vs Input Frequency with
Input Perturbation of 100% (60Hz Notch)
Figure 22. Input Normal Mode Rejection vs Input Frequency with
Input Perturbation of 100% (50Hz Notch)
5f
12.5 25 37.5 50 62.5 75 87.5 100 112.5 125 137.5 150 162.5 175 187.5 200
N
15
f
N
6f
= f
N
30
EOSC/5120
7f
N
45
2487 F19
8f
N
60
75
90
INPUT FREQUENCY (Hz)
INPUT FREQUENCY (Hz)
105 120 135 150 165 180 195 210 225 240
MEASURED DATA
CALCULATED DATA
MEASURED DATA
CALCULATED DATA
Figure 20. Input Normal Mode Rejection at f
–100
–110
–120
–10
–20
–30
–40
–50
–60
–70
–80
–90
250f
0
N
252f
V
V
V
V
INPUT SIGNAL FREQUENCY (Hz)
V
V
V
V
T
T
A
CC
REF
IN(CM)
IN(P-P)
CC
REF
IN(CM)
IN(P-P)
A
N
= 25°C
= 25°C
= 5V
= 5V
= 5V
= 5V
254f
= 2.5V
= 5V
= 2.5V
= 5V
2487 F22
2487 F21
N
256f
N
258f
f
N
N
= f
EOSC/5120
260f
N
2487 F20
262f
S
N
= 256 • f
N
2487fa