LTC2485 LINER [Linear Technology], LTC2485 Datasheet - Page 31

• Manufacturer Part Number: LTC2485
• Description: 24-Bit ?? ADC with Easy Drive Input Current Cancellation and I2C Interface
• Manufacturer: LINER [Linear Technology]

APPLICATIO S I FOR ATIO
Figure 37. Input Normal Mode Rejection vs Input Frequency
with Input Perturbation of 100% Full Scale (50Hz/60Hz Mode)
–100
–120
Figure 35. Input Normal Mode Rejection vs Input Frequency
with Input Perturbation of 100% Full Scale (60Hz Notch)
–100
–120
–20
–40
– 60
–80
–20
–40
– 60
–80
0
0
0
0
15
20
30
40
45
60
60
U
75
80
90
INPUT FREQUENCY (Hz)
INPUT FREQUENCY (Hz)
U
105 120 135 150 165 180 195 210 225 240
100
120
–100
–120
– 60
–20
–40
–80
MEASURED DATA
CALCULATED DATA
MEASURED DATA
CALCULATED DATA
W
0
Figure 39. Measured Input Normal Mode Rejection vs
Input Frequency with Input Perturbation of 150% Full
Scale (50Hz Notch)
0
140
12.5 25 37.5 50 62.5 75 87.5 100 112.5 125 137.5 150 162.5 175 187.5 200
160
180
U
V
V
V
V
T
V
V
V
V
T
A
CC
REF
IN(CM)
IN(P-P)
A
CC
REF
IN(CM)
IN(P-P)
= 25°C
= 25°C
= 5V
= 5V
200
= 5V
= 5V
= 2.5V
= 2.5V
= 5V
= 5V
2485 F35
2485 F37
INPUT FREQUENCY (Hz)
220
V
V
(150% OF FULL SCALE)
IN(P-P)
IN(P-P)
–100
–120
Figure 36. Input Normal Mode Rejection vs Input Frequency
with Input Perturbation of 100% Full Scale (50Hz Notch)
–100
–120
– 60
–20
–40
–80
–20
–40
– 60
–80
0
0
Figure 38. Measured Input Normal Mode Rejection vs
Input Frequency with Input Perturbation of 150% Full
Scale (60Hz Notch)
= 5V
= 7.5V
0
0
12.5 25 37.5 50 62.5 75 87.5 100 112.5 125 137.5 150 162.5 175 187.5 200
15
30
45
V
V
V
T
60
A
CC
REF
IN(CM)
= 25°C
= 5V
= 5V
75
= 2.5V
2485 F39
90
INPUT FREQUENCY (Hz)
INPUT FREQUENCY (Hz)
105 120 135 150 165 180 195 210 225 240
V
V
(150% OF FULL SCALE)
IN(P-P)
IN(P-P)
MEASURED DATA
CALCULATED DATA
= 5V
= 7.5V
LTC2485
V
V
V
V
V
V
V
T
T
CC
REF
IN(CM)
IN(P-P)
A
CC
REF
INCM
A
31
= 25°C
= 25°C
= 5V
= 5V
= 5V
= 5V
= 2.5V
= 2.5V
= 5V
2485fa
2485 F38
2485 F36