Datasheet

13
21454314fa
LTC2145-14/
LTC2144-14/LTC2143-14
TYPICAL PERFORMANCE CHARACTERISTICS
LTC2143-14: Shorted Input
Histogram
LTC2143-14: 64k Point 2-Tone FFT,
f
IN
= 69MHz, 70MHz, –1dBFS,
80Msps
LTC2143-14: SNR vs Input
Frequency, –1dBFS, 80Msps,
2V Range
LTC2143-14: 2nd, 3rd Harmonic vs
Input Frequency, –1dBFS, 80Msps,
2V Range
LTC2143-14: 2nd, 3rd Harmonic vs
Input Frequency, –1dBFS, 80Msps,
1V Range
LTC2143-14: SFDR vs Input Level,
f
IN
= 70MHz, 80Msps, 2V Range
LTC2143-14: I
VDD
vs Sample
Rate, 5MHz, –1dBFS, Sine Wave
Input on Each Channel
LTC2143-14: IO
VDD
vs Sample
Rate, 5MHz, –1dBFS, Sine Wave
on Each Input
LTC2143-14: SNR vs SENSE,
f
IN
= 5MHz, –1dBFS
FREQUENCY (MHz)
0
–100
–110
–120
–70
–60
–80
–90
AMPLITUDE (dBFS)
–50
–30
–40
–20
–10
0
10 20 30 40
21454314 G37
OUTPUT CODE
8183
0
COUNT
3000
4000
5000
8185
8187 8189
6000
2000
1000
8191
21454314 G38
INPUT FREQUENCY (MHz)
0
72
71
70
74
73
SNR (dBFS)
50 100 150 200 250 300
21454314 G39
SINGLE-ENDED
ENCODE
DIFFERENTIAL
ENCODE
0 50 100 150 200 250 300
INPUT FREQUENCY (MHz)
90
85
80
75
70
65
100
95
2ND AND 3RD HARMONIC (dBFS)
21454314 G40
2ND
3RD
0 50 100 150 200 250 300
INPUT FREQUENCY (MHz)
90
85
80
75
70
65
100
95
2ND AND 3RD HARMONIC (dBFS)
218543 G41
2ND
3RD
INPUT LEVEL (dBFS)
120
90
80
100
110
SFDR (dBc AND dBFS)
70
50
60
40
30
21454314 G42
–80
–70
–60 –50 –40 –30 –20 –10 0
dBc
dBFS
SAMPLE RATE (Msps)
0
40
45
70
65
60
55
50
I
VDD
(mA)
20 40 60 80
21454314 G43
CMOS OUTPUTS
LVDS OUTPUTS
SAMPLE RATE (Msps)
0
10
0
20
30
70
60
50
40
IO
VDD
(mA)
20 40 60 80
21454314 G44
3.5mA LVDS
1.75mA LVDS
1.8V CMOS
SENSE PIN (V)
0.6
71
72
69
70
68
67
66
74
73
SNR (dBFS)
0.8 10.7 0.9 1.1 1.2 1.3
21454314 G45