LTC1409 Ver la hoja de datos (PDF) - Linear Technology
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LTC1409 Datasheet PDF : 20 Pages
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WU
TI I G CHARACTERISTICS
Note 11: The falling CONVST edge starts a conversion. If CONVST returns
high at a critical point during the conversion it can create small errors. For
best results ensure that CONVST returns high either within 650ns after
conversion start or after BUSY rises.
LTC1409
Note 12: Signal-to-noise ratio (SNR) is measured at 100kHz and distortion
is measured at 400kHz. These results are used to calculate signal-to-noise
plus distortion (SINAD).
TYPICAL PERFORMANCE CHARACTERISTICS
S/(N + D) vs Input Frequency
and Amplitude
80
70 VIN = 0dB
60
50 VIN = 20dB
40
30
20
VIN = 60dB
10
0
1k
10k
100k
1M
10M
INPUT FREQUENCY (Hz)
LTC1409 • TPC01
Signal-to-Noise Ratio vs
Input Frequency
80
70
60
50
40
30
20
10
0
1k
10k
100k
1M
10M
INPUT FREQUENCY (Hz)
LTC1409 • TPC02
Distortion vs Input Frequency
0
–10
–20
–30
–40
–50
–60
–70
–80
3RD
THD
–90
2ND
–100
1k
10k
100k
1M
10M
INPUT FREQUENCY (Hz)
LTC1409 • TPC03
Spurious-Free Dynamic Range vs
Input Frequency
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
10k
100k
1M
10M
INPUT FREQUENCY (Hz)
LTC1409 • TPC04
Intermodulation Distortion Plot
0
–20
–40
fSAMPLE = 800kHz
fIN1 = 88.19580078kHz
fIN2 = 111.9995117kHz
–60 fb – fa
–80
2fa – fb
–100
2fb – fa
2fa
fa + fb
2fb
2fa + fb
3fa fa + 2fb
3fb
–120
0
50k
100k
150k
200k
250k
300k
350k
400k
FREQUENCY (Hz)
LTC1409 • TPC05
5
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