Datasheet

9
21421012fa
LTC2142-12/
LTC2141-12/LTC2140-12
TYPICAL PERFORMANCE CHARACTERISTICS
LTC2142-12: Integral
Non-Linearity (INL)
LTC2142-12: Differential
Non-Linearity (DNL)
LTC2142-12: 64k Point FFT, f
IN
=
5MHz, –1dBFS, 65Msps
OUTPUT CODE
0
–1.0
–0.8
–0.6
–0.4
INL ERROR (LSB)
0.2
0.0
1.0
0.6
0.8
0.2
0.4
1024
2048 3072 4096
21421012 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
21421012 G02
0
1024
2048 3072 4096
FREQUENCY (MHz)
–100
–110
–120
–70
–60
–80
–90
AMPLITUDE (dBFS)
–50
–30
–40
–20
–10
0
21421012 G03
0
10
20 30
LTC2142-12: 64k Point FFT,
f
IN
= 30MHz, –1dBFS, 65Msps
LTC2142-12: 64k Point FFT,
f
IN
= 70MHz, –1dBFS, 65Msps
LTC2142-12: 64k Point FFT,
f
IN
= 140MHz, –1dBFS, 65Msps
LTC2142-12: 64k Point 2-Tone
FFT, f
IN
= 69MHz, 70MHz,
–7dBFS, 65Msps
LTC2142-12: Shorted Input
Histogram
FREQUENCY (MHz)
–100
–110
–120
–70
–60
–80
–90
AMPLITUDE (dBFS)
–50
–30
–40
–20
–10
0
21421012 G04
LTC2142-12: 64k Point 2-Tone
FFT f
IN
=
69MHz 70MH
z
FREQUENCY
(M
Hz)
21421012
G04
0
10
20 30
FREQUENCY (MHz)
–100
–110
–120
–70
–60
–80
–90
AMPLITUDE (dBFS)
–50
–30
–40
–20
–10
0
21421012 G05
LT
C
2142-12:
S
horted Input
Histo
g
ram
FREQUENCY
(M
Hz)
21421012
G
0
5
0
10
20 30
FREQUENCY (MHz)
–100
–110
–120
–70
–60
–80
–90
AMPLITUDE (dBFS)
–50
–30
–40
–20
–10
0
21421012 G06
FREQUENCY
(M
Hz)
21421012
G
0
6
0
10
20 30
OUTPUT CODE
2043 2044
2000
0
6000
4000
COUNT
8000
10000
18000
16000
14000
12000
2045 2046 2047
21421012 G08
INPUT FREQUENCY (MHz)
0
70
69
68
72
71
SNR (dBFS)
50 100 150 200 250 300
21421012 G09
SINGLE-ENDED
ENCODE
DIFFERENTIAL
ENCODE
LTC2142-12: SNR vs Input
Frequency, –1dBFS, 65Msps,
2V Range
FREQUENCY (MHz)
–100
–110
–120
–70
–60
–80
–90
AMPLITUDE (dBFS)
–50
–30
–40
–20
–10
0
21421012 G07
FREQUENCY
(
MHz
)
21421012
G
0
7
0
10
20 30