Datasheet

9
21454312fa
LTC2145-12/
LTC2144-12/LTC2143-12
TYPICAL PERFORMANCE CHARACTERISTICS
LTC2145-12: Integral
Non-Linearity (INL)
LTC2145-12: Differential
Non-Linearity (DNL)
LTC2145-12: 64k Point FFT, f
IN
=
5MHz, –1dBFS, 125Msps
OUTPUT CODE
0
–1.0
–0.8
–0.6
–0.4
INL ERROR (LSB)
–0.2
0.0
0.2
1.0
0.6
0.8
0.4
1024
2048 3072 4096
21454312 G01
OUTPUT CODE
–1.0
–0.4
–0.2
–0.6
–0.8
DNL ERROR (LSB)
0
0.4
0.2
0.6
0.8
1.0
21454312 G02
0
1024
2048 3072 4096
FREQUENCY (MHz)
–100
–110
–120
–70
–60
–80
–90
AMPLITUDE (dBFS)
–50
–30
–40
–20
–10
0
21454312 G03
0
10
20 30 40 50 60
LTC2145-12: 64k Point FFT,
f
IN
= 30MHz, –1dBFS, 125Msps
LTC2145-12: 64k Point FFT,
f
IN
= 70MHz, –1dBFS, 125Msps
LTC2145-12: 64k Point FFT,
f
IN
= 140MHz, –1dBFS, 125Msps
LTC2145-12: 64k Point 2-Tone
FFT, f
IN
= 69MHz, 70MHz,
–7dBFS, 125Msps
LTC2145-12: Shorted Input
Histogram
FREQUENCY (MHz)
0
–100
–110
–120
–70
–60
–80
–90
AMPLITUDE (dBFS)
–50
–30
–40
–20
–10
0
21454312 G04
10
20 30 40 50 60
FREQUENCY (MHz)
0
–100
–110
–120
–70
–60
–80
–90
AMPLITUDE (dBFS)
–50
–30
–40
–20
–10
0
10
20 30 40 50 60
21454312 G05
FREQUENCY
(
MHz
)
0
10
20
30
40
50
60
2
1454312
G05
FREQUENCY (MHz)
0
–100
–110
–120
–70
–60
–80
–90
AMPLITUDE (dBFS)
–50
–30
–40
–20
–10
0
10
20 30 40 50 60
21454312 G06
FREQUENCY
(
M
Hz)
0
10
20
30
40
50
60
2
1454312
G
0
6
OUTPUT CODE
2043 2044
2000
0
6000
4000
COUNT
8000
10000
18000
16000
14000
12000
2045 2046
2047
21454312 G08
INPUT FREQUENCY (MHz)
0
69
68
72
71
70
SNR (dBFS)
50 100 150 200 250 300
21454312 G09
SINGLE-ENDED
ENCODE
DIFFERENTIAL
ENCODE
LTC2145-12: SNR vs Input Frequency,
–1dBFS, 125Msps, 2V Range
FREQUENCY (MHz)
0
–100
–110
–120
–70
–60
–80
–90
AMPLITUDE (dBFS)
–50
–30
–40
–20
–10
0
10
20 30 40 50 60
21454312 G07
FREQUENCY (MHz
)
0
1
0
20
30
40
50
60
2145431
2
G0
7