Datasheet

LTC2145-14/
LTC2144-14/LTC2143-14
10
21454314fa
TYPICAL PERFORMANCE CHARACTERISTICS
LTC2145-14: SFDR vs Input Level,
f
IN
= 70MHz, 125Msps, 2V Range
LTC2145-14: I
VDD
vs Sample
Rate, 5MHz, –1dBFS, Sine Wave
Input on Each Channel
LTC2145-14: 2nd, 3rd Harmonic
vs Input Frequency, –1dBFS,
125Msps, 2V Range
LTC2145-14: IO
VDD
vs Sample
Rate, 5MHz, –1dBFS, Sine Wave
on Each Input
LTC2145-14: SNR vs SENSE,
f
IN
= 5MHz, –1dBFS
LTC2144-14: Integral
Nonlinearity (INL)
LTC2144-14: Differential
Nonlinearity (DNL)
LTC2144-14: 64k Point FFT,
f
IN
= 5MHz, –1dBFS, 105Msps
LTC2145-14: 2nd, 3rd Harmonic
vs Input Frequency, –1dBFS,
125Msps, 1V Range
0 50 100 150 200 250 300
INPUT FREQUENCY (MHz)
90
85
80
75
70
65
100
95
2ND AND 3RD HARMONIC (dBFS)
21454314 G10
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 G11
2ND
3RD
INPUT LEVEL (dBFS)
120
90
80
100
110
SFDR (dBc AND dBFS)
70
50
60
40
30
21454314 G12
–80
–70
–60 –50 –40 –30 –20 –10 0
dBc
dBFS
SAMPLE RATE (Msps)
0
75
80
85
110
105
100
95
90
I
VDD
(mA)
25 50 75 125100
21454314 G13
CMOS OUTPUTS
LVDS OUTPUTS
SAMPLE RATE (Msps)
0
10
0
20
30
70
60
50
40
IO
VDD
(mA)
25 50 75 125100
21454314 G14
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 G15
OUTPUT CODE
–2.0
–1.0
–0.5
–1.5
INL ERROR (LSB)
0.5
0
1.0
1.5
2.0
21454314 G16
0
4096
8192 12288 16384
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 G17
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 50
21454314 G1