Datasheet

LTC2142-12/
LTC2141-12/LTC2140-12
12
21421012fa
TYPICAL PERFORMANCE CHARACTERISTICS
LTC2140-12: 64k Point FFT,
f
IN
= 70MHz, –1dBFS, 25Msps
LTC2140-12: 64k Point FFT,
f
IN
= 140MHz, –1dBFS, 25Msps
LTC2140-12: 64k Point FFT,
f
IN
= 30MHz, –1dBFS, 25Msps
LTC2141-12: I
VDD
vs Sample
Rate, 5MHz, –1dBFS Sine Wave
Input on Each Channel
SAMPLE RATE (Msps)
0
35
30
25
40
I
VDD
(mA)
10 20 30 40
21421012 G28
LVDS OUTPUTS
CMOS OUTPUTS
LTC2141-12: IO
VDD
vs Sample
Rate, 5MHz, –1dBFS, Sine Wave
Input on Each Channel
LTC2141-12: SNR vs SENSE,
f
IN
= 5MHz, –1dBFS
LTC2140-12: Integral
Non-Linearity (INL)
LTC2140-12: Differential
Non-Linearity (DNL)
LTC2140-12: 64k Point FFT,
f
IN
= 5MHz, –1dBFS, 25Msps
SAMPLE RATE (Msps)
10
20
0
70
60
50
30
40
IO
VDD
(mA)
21421012 G29
0 10203040
1.8V CMOS
1.75mA LVDS
3.5mA LVDS
SENSE PIN (V)
0.6
67
66
68
69
72
71
70
SNR (dBFS)
0.7 0.8 0.9 1.1 1.2 1.31
21421012 G30
OUTPUT CODE
0
–1.0
–0.8
–0.6
–0.4
INL ERROR (LSB)
–0.2
0.0
1.0
0.6
0.8
0.4
1024
2048 3072 4096
21421012 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
21421012 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
510
21421012 G33
LT
C2
14
0-
12
:
64
k
Po
in
t
FF
T
F
REQUENCY
(M
Hz)
0
5
10
21421012
G33
FREQUENCY (MHz)
0
–100
–110
–120
–70
–60
–80
–90
AMPLITUDE (dBFS)
–50
–30
–40
–20
–10
0
510
21421012 G36
FREQUENCY (MHz)
0
–100
–110
–120
–70
–60
–80
–90
AMPLITUDE (dBFS)
–50
–30
–40
–20
–10
0
510
21421012 G35
F
REQUENCY
(M
Hz)
0
5
10
21421012
G
3
5
FREQUENCY (MHz)
0
–100
–110
–120
–70
–60
–80
–90
AMPLITUDE (dBFS)
–50
–30
–40
–20
–10
0
510
21421012 G34
FREQUENCY
(M
Hz)
0
5
10
21421012
G34