Datasheet

LTC2145-12/
LTC2144-12/LTC2143-12
12
21454312fa
TYPICAL PERFORMANCE CHARACTERISTICS
LTC2143-12: 64k Point FFT,
f
IN
= 70MHz, –1dBFS, 80Msps
LTC2143-12: 64k Point FFT,
f
IN
= 140MHz, –1dBFS, 80Msps
LTC2143-12: 64k Point FFT,
f
IN
= 30MHz, –1dBFS, 80Msps
LTC2144-12: I
VDD
vs Sample
Rate, 5MHz, –1dBFS Sine Wave
Input on Each Channel
SAMPLE RATE (Msps)
0
70
75
80
60
65
55
50
85
I
VDD
(mA)
25 50 75 100
21454312 G28
LVDS OUTPUTS
CMOS OUTPUTS
LTC2144-12: IO
VDD
vs Sample
Rate, 5MHz, –1dBFS, Sine Wave
on Each Input
LTC2144-12: SNR vs SENSE,
f
IN
= 5MHz, –1dBFS
LTC2143-12: Integral
Non-Linearity (INL)
LTC2143-12: Differential
Non-Linearity (DNL)
LTC2143-12: 64k Point FFT,
f
IN
= 5MHz, –1dBFS, 80Msps
SAMPLE RATE (Msps)
10
20
0
70
60
50
30
40
IOV
DD
(mA)
21454312 G29
0 255075100
3.5mA LVDS
1.75mA LVDS
1.8V CMOS
1.2V CMOS
SENSE PIN (V)
0.6
65
66
67
72
71
70
69
68
SNR (dBFS)
0.7 0.8 0.9 1.1 1.2 1.31
21454312 G30
OUTPUT CODE
0
–1.0
–0.8
–0.6
–0.4
INL ERROR (LSB)
0.2
0.0
1.0
0.4
0.6
0.8
0.2
1024
2048 3072 4096
21454312 G31
–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 G32
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
21454312 G33
LTC2143-12: 64k Point FFT
,
FREQUENCY (MHz
)
0
1
0
2
0
3
0
4
0
21454312
G
3
3
FREQUENCY (MHz)
0
–100
–110
–120
–70
–60
–80
–90
AMPLITUDE (dBFS)
–50
–30
–40
–20
–10
0
10 20 30 40
21454312 G36
21454312
f
FRE
Q
UEN
C
Y (M
Hz)
0
10
20
30
40
2
1454312
G36
FREQUENCY (MHz)
0
–100
–110
–120
–70
–60
–80
–90
AMPLITUDE (dBFS)
–50
–30
–40
–20
–10
0
10 20 30 40
21454312 G35
FREQUENCY
(
MHz
)
0
10
20
30
40
21454312
G
3
5
FREQUENCY (MHz)
0
–100
–110
–120
–70
–60
–80
–90
AMPLITUDE (dBFS)
–50
–30
–40
–20
–10
0
10 20 30 40
21454312 G34
F
REQUENCY
(
M
Hz)
0
10
20
30
40
21454312
G34