Datasheet

LTC2145-12/
LTC2144-12/LTC2143-12
10
21454312fa
TYPICAL PERFORMANCE CHARACTERISTICS
LTC2145-12: SFDR vs Input Level,
f
IN
= 70MHz, 125Msps, 2V Range
LTC2145-12: I
VDD
vs Sample
Rate, 5MHz, –1dBFS Sine Wave
Input on Each Channel
INPUT LEVEL (dBFS)
–80
40
30
20
10
0
60
50
SFDR (dBc AND dBFS)
70
80
110
100
90
–70 –60 –50 –40 –30 –20 –10 0
21454312 G12
dBc
dBFS
SAMPLE RATE (Msps)
0
95
100
105
80
85
90
75
70
110
I
VDD
(mA)
25 50 75 100 125
21454312 G13
CMOS OUTPUTS
LVDS OUTPUTS
0 50 100 150 200 250 300
INPUT FREQUENCY (MHz)
90
85
80
75
70
65
100
95
2ND AND 3RD HARMONIC (dBFS)
21454312 G10
2ND
3RD
LTC2145-12: 2nd, 3rd Harmonic
vs Input Frequency, –1dBFS,
125Msps, 2V Range
LTC2145-12: IO
VDD
vs Sample
Rate, 5MHz, –1dBFS, Sine Wave
on Each Input
LTC2145-12: SNR vs SENSE,
f
IN
= 5MHz, –1dBFS
LTC2144-12: Integral
Non-Linearity (INL)
LTC2144-12: Differential
Non-Linearity (DNL)
LTC2144-12: 64k Point FFT,
f
IN
= 5MHz, –1dBFS, 105Msps
SAMPLE RATE (Msps)
0
10
20
0
60
50
30
40
IOV
DD
(mA)
25 50 75 100 125
21454312 G14
3.5mA LVDS
1.75mA LVDS
1.8V CMOS
1.2V CMOS
SENSE PIN (V)
0.6
66
65
67
68
72
71
70
69
SNR (dBFS)
0.7 0.8 0.9 1.1 1.2 1.31
21454312 G15
OUTPUT CODE
0
–1.0
–0.8
–0.6
–0.4
INL ERROR (LSB)
0.2
–0.2
0.0
1.0
0.6
0.8
0.4
1024
2048 3072 4096
21454312 G16
–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 G17
OUTPUT CODE
0
1024
2048 3072 4096
FREQUENCY (MHz)
0
–100
–110
–120
–70
–60
–80
–90
AMPLITUDE (dBFS)
–50
–30
–40
–20
–10
0
10 20 30 40 50
21454312 G18
21454312
f
F
REQUENCY (MHz
)
0
10
20
30
40
50
21454312
G
1
8
0 50 100 150 200 250 300
INPUT FREQUENCY (MHz)
90
85
80
75
70
65
100
95
2ND AND 3RD HARMONIC (dBFS)
21454312 G11
2ND
3RD
LTC2145-12: 2nd, 3rd Harmonic
vs Input Frequency, –1dBFS,
125Msps, 1V Range