Datasheet

LTC2142-14/
LTC2141-14/LTC2140-14
12
21421014fa
TYPICAL PERFORMANCE CHARACTERISTICS
LTC2140-14: 64k Point FFT,
f
IN
= 70MHz, –1dBFS, 25Msps
LTC2140-14: 64k Point FFT,
f
IN
= 140MHz, –1dBFS, 25Msps
LTC2140-14: 64k Point FFT,
f
IN
= 30MHz, –1dBFS, 25Msps
LTC2141-14: I
VDD
vs Sample
Rate, 5MHz, –1dBFS, Sine Wave
Input on Each Channel
LTC2141-14: I
OVDD
vs Sample
Rate, 5MHz, –1dBFS, Sine Wave
Input on Each Channel
LTC2141-14: SNR vs SENSE,
f
IN
= 5MHz, –1dBFS
LTC2140-14: Integral
Nonlinearity (INL)
LTC2140-14: Differential
Nonlinearity (DNL)
LTC2140-14: 64k Point FFT,
f
IN
= 5MHz, –1dBFS, 25Msps
SAMPLE RATE (Msps)
0
40
30
35
25
45
I
VDD
(mA)
10 20
21421014 G28
30 40
CMOS OUTPUTS
LVDS OUTPUTS
SAMPLE RATE (Msps)
0
50
60
30
40
20
10
0
70
I
OVDD
(mA)
10 20 40
21421014 G29
30
3.5mA LVDS
1.75mA LVDS
1.8V CMOS
SENSE PIN (V)
0.6
70
71
68
69
67
66
72
73
74
SNR (dBFS)
0.8 10.7 0.9 1.1 1.2 1.3
21421014 G30
OUTPUT CODE
–2.0
–1.0
–0.5
–1.5
INL ERROR (LSB)
0
0.5
1.0
1.5
2.0
21421014 G31
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
21421014 G32
0
4096
8192 12288 16384
FREQUENCY (MHz)
0
–100
–110
–120
–70
–60
–80
–90
AMPLITUDE (dBFS)
–50
–30
–40
–20
–10
0
510
21421014 G33
FREQUENCY (MHz)
0
–100
–110
–120
–70
–60
–80
–90
AMPLITUDE (dBFS)
–50
–30
–40
–20
–10
0
510
21421014 G34
FREQUENCY (MHz)
0
–100
–110
–120
–70
–60
–80
–90
AMPLITUDE (dBFS)
–50
–30
–40
–20
–10
0
510
21421014 G35
FREQUENCY (MHz)
0
–100
–110
–120
–70
–60
–80
–90
AMPLITUDE (dBFS)
–50
–30
–40
–20
–10
0
510
21421014 G36