ltc2428 Linear Technology Corporation, ltc2428 Datasheet - Page 18

• Manufacturer Part Number: ltc2428
• Description: 4-/8-channel 20-bit ?power No Latency Delta-sigma Adc
• Manufacturer: Linear Technology Corporation

APPLICATIONS
LTC2424/LTC2428
18
Figure 12a. Digitized Waveform with 2V DC Offset
Figure 12c. Digitized Waveform with No Offset
–0.05
–0.10
–0.15
–0.20
–0.05
–0.10
–0.15
–0.20
2.20
2.15
2.10
2.05
2.00
1.95
1.90
1.85
1.80
0.20
0.15
0.10
0.05
0.00
0.20
0.15
0.10
0.05
0
0
0
0
V
V
IN
IN
Figure 11a. Digitized Waveform
= 300mV
= 300mV
0.5
0.5
500ms
0.5
U
P-P
P-P
Figure 12. Using the LTC2424/LTC2428’s High Accuracy Wide Dynamic Range
to Digitize a 300mV
1
1
+ 2V DC
+ 0V DC
INFORMATION
TIME (SEC)
TIME (SEC)
1
TIME (SEC)
U
1.5
1.5
1.5
2
2
W
2
2.5
2.5
f
IN
24248 F12a
24248 F12c
24248 F11a
P-P
= 2Hz
Figure 11. Transient Signal Acquisition
2.5
15Hz Waveform with a Large DC Offset (V
U
Figure 12b. FFT Waveform with 2V DC Offset
–100
–100
–120
–120
–100
–120
Figure 12d. FFT Waveform with No Offset
–20
–40
–80
–20
–40
–80
–60
–60
–20
–40
–60
–80
0
0
0
0
0
0
CC
Figure 11b. Output FFT
= 5V, V
FREQUENCY (Hz)
FREQUENCY (Hz)
FREQUENCY (Hz)
REF
25
25
25
= 5V)
15Hz
100sps
2V OFFSET
15Hz
100sps
0V OFFSET
2Hz
100sps
0V OFFSET
24248 F12b
24248 F12d
24248 F11b
50
50
50