LTC1409 LINER [Linear Technology], LTC1409 Datasheet - Page 5

• Manufacturer Part Number: LTC1409
• Description: 12-Bit, 800ksps Sampling A/D Converter with Shutdown
• Manufacturer: LINER [Linear Technology]

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.
TYPICAL PERFORMANCE CHARACTERISTICS
–100
W U
–10
–20
–30
–40
–50
–60
–70
–80
–90
80
70
60
50
40
30
20
10
0
0
10k
1k
Spurious-Free Dynamic Range vs
Input Frequency
S/(N + D) vs Input Frequency
and Amplitude
V
V
V
IN
IN
IN
= 0dB
= 20dB
= 60dB
10k
INPUT FREQUENCY (Hz)
INPUT FREQUENCY (Hz)
100k
100k
1M
1M
W
LTC1409 • TPC04
LTC1409 • TPC01
U
10M
10M
–100
–120
–20
–40
–60
–80
80
70
60
50
40
30
20
10
0
0
1k
Signal-to-Noise Ratio vs
Input Frequency
0
Intermodulation Distortion Plot
fb – fa
2fa – fb
10k
INPUT FREQUENCY (Hz)
50k
100k
100k
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).
1M
LTC1409 • TPC02
150k
2fb – fa
2fa
FREQUENCY (Hz)
10M
200k
fa + fb
–100
–10
–20
–30
–40
–50
–60
–70
–80
–90
0
2fb
1k
Distortion vs Input Frequency
250k
THD
2fa + fb
10k
INPUT FREQUENCY (Hz)
300k
3RD
3fa
f
f
f
SAMPLE
IN1
IN2
100k
= 88.19580078kHz
= 111.9995117kHz
fa + 2fb
LTC1409
= 800kHz
350k
3fb
LTC1409 • TPC05
1M
2ND
LTC1409 • TPC03
400k
5
10M