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LTC2420CS8 датащи(PDF) 27 Page - Linear Technology

номер детали LTC2420CS8
подробное описание детали  20-Bit mPower No Latency DSTM ADC in SO-8
PDF  36 Pages
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производитель  LINER [Linear Technology]
домашняя страница  http://www.linear.com
Logo LINER - Linear Technology

LTC2420CS8 датащи(HTML) 27 Page - Linear Technology

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27
LTC2420
Figure 31. Total Unadjusted Error at
100 Samples/Second (No Averaging)
Figure 32. Total Unadjusted Error at
7.5 Samples/Second (No Averaging)
Figure 30. Total Error vs VREF (Output Rate = 100sps)
APPLICATIO S I FOR ATIO
REFERENCE VOLTAGE (V)
1.0
128
192
5.0
2420 F30
64
0
2.0
3.0
4.0
1.5
2.5
3.5
4.5
256
96
160
32
224
OUTPUT RATE = 100sps
12 BITS
13 BITS
14 BITS
15 BITS
INPUT VOLTAGE (V)
0
–40
–30
–25
–20
–15
–10
–5
2420 F31
0
5
10
–35
2.5
VCC = 5V
VREF = 2.5V
INPUT VOLTAGE (V)
0
–2
0
2
5
2420 F32
–4
–6
–10
–8
6
4
VCC = 5V
VREF = 5V
After acquiring 100 samples/second data the FO pin may
be driven LOW enabling 60Hz rejection to 110dB and the
highest possible DC accuracy. The no latency architecture
of the LTC2420 allows consecutive readings (one at 100
samples/second the next at 7.5 samples/second) without
interaction between the two readings.
As shown in Figure 33, the LTC2420 can capture transient
data with 90dB of dynamic range (with a 300mVP-P input
signal at 2Hz). The exceptional DC performance of the
LTC2420 enables signals to be digitized independent of a
large DC offset. Figures 34a and 34b show the dynamic
performance with a 15Hz signal superimposed on a 2V DC
level. The same signal with no DC level is shown in Figures
34c and 34d.



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