Datasheet

LTC2145-14/
LTC2144-14/LTC2143-14
12
21454314fa
TYPICAL PERFORMANCE CHARACTERISTICS
LTC2143-14: 64k Point FFT,
f
IN
= 70MHz, –1dBFS, 80Msps
LTC2143-14: 64k Point FFT,
f
IN
= 140MHz, –1dBFS, 80Msps
LTC2143-14: 64k Point FFT,
f
IN
= 30MHz, –1dBFS, 80Msps
LTC2144-14: I
VDD
vs Sample
Rate, 5MHz, –1dBFS, Sine Wave
Input on Each Channel
LTC2144-14: IO
VDD
vs Sample
Rate, 5MHz, –1dBFS, Sine Wave
on Each Input
LTC2144-14: SNR vs SENSE,
f
IN
= 5MHz, –1dBFS
LTC2143-14: Integral
Nonlinearity (INL)
LTC2143-14: Differential
Nonlinearity (DNL)
LTC2143-14: 64k Point FFT,
f
IN
= 5MHz, –1dBFS, 80Msps
SAMPLE RATE (Msps)
0
55
60
65
90
85
80
75
70
I
VDD
(mA)
25 50 75 100
21454314 G28
CMOS OUTPUTS
LVDS OUTPUTS
SAMPLE RATE (Msps)
0
10
0
20
30
70
60
50
40
IO
VDD
(mA)
25 50 75 100
21454314 G29
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 G30
OUTPUT CODE
INL ERROR (LSB)
21454314 G31
0
4096
8192 12288 16384
–2.0
–1.0
–0.5
–1.5
0.5
0
1.0
1.5
2.0
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
21454314 G32
0
4096
8192 12288 16384
FREQUENCY (MHz)
0
–100
–110
–120
–70
–60
–80
–90
AMPLITUDE (dBFS)
–50
–30
–40
–20
–10
0
10 20 30 40
21454314 G33
FREQUENCY (MHz)
0
–100
–110
–120
–70
–60
–80
–90
AMPLITUDE (dBFS)
–50
–30
–40
–20
–10
0
10 20 30 40
21454314 G34
FREQUENCY (MHz)
0
–100
–110
–120
–70
–60
–80
–90
AMPLITUDE (dBFS)
–50
–30
–40
–20
–10
0
10 20 30 40
21454314 G35
FREQUENCY (MHz)
0
–100
–110
–120
–70
–60
–80
–90
AMPLITUDE (dBFS)
–50
–30
–40
–20
–10
0
10 20 30 40
21454314 G36