Datasheet

13
21576512f
LTC2157-12/
LTC2156-12/LTC2155-12
LTC2155-12: 32K Point FFT,
f
IN
= 176MHz, –1dBFS, 170Msps
LTC2155-12: 32K Point FFT,
f
IN
= 420MHz, –1dBFS, 170Msps
LTC2155-12: 32K Point FFT,
f
IN
= 567MHz, –1dBFS, 170Msps
LTC2155-12: 32K Point FFT,
f
IN
= 907MHz, –1dBFS, 170Msps
LTC2155-12: 32K Point FFT,
f
IN
= 380MHz, –1dBFS, 170Msps
LTC2155-12: 32K Point FFT,
f
IN
= 225MHz, –1dBFS, 170Msps
TYPICAL PERFORMANCE CHARACTERISTICS
FREQUENCY (MHz)
0
–120
AMPLITUDE (dBFS)
–100
–80
–60
–40
0
20
40 60
10
30 50 70
21576512 G46
80
–20
FREQUENCY (MHz)
0
–120
AMPLITUDE (dBFS)
–100
–80
–60
–40
0
20
40 60
10
30 50 70
21576512 G47
80
–20
FREQUENCY (MHz)
0
–120
AMPLITUDE (dBFS)
–100
–80
–60
–40
0
20
40 60
10
30 50 70
21576512 G48
80
–20
FREQUENCY (MHz)
0
–120
AMPLITUDE (dBFS)
–100
–80
–60
–40
0
20
40 60
10
30 50 70
21576512 G49
80
–20
FREQUENCY (MHz)
0
–120
AMPLITUDE (dBFS)
–100
–80
–60
–40
0
20
40 60
10
30 50 70
21576512 G50
80
–20
FREQUENCY (MHz)
0
–120
AMPLITUDE (dBFS)
–100
–80
–60
–40
0
20
40 60
10
30 50 70
21576512 G51
80
–20
LTC2155-12: 32K Point 2-Tone
FFT, f
IN
= 70.0MHz and 69.0MHz,
170Msps
LTC2155-12: Shorted
Input Histogram
FREQUENCY (MHz)
0
–120
AMPLITUDE (dBFS)
–100
–80
–60
–40
0
20 3010
40 50 60 70 80
21576512 G52
–20
OUTPUT CODE
2056
COUNT
12000
16000
20000
21576512 G53
8000
4000
10000
14000
18000
6000
2000
0
2060
2064
LTC2155-12: I
OVDD
vs Sample Rate,
15MHz Sine Wave Input, –1dBFS
SAMPLE RATE (Msps)
0
25
I
OVDD
(mA)
30
40
45
50
68
136
170
70
21576512 G54
35
34 102
55
60
65
LVDS CURRENT 3.5mA
LVDS CURRENT 1.75mA