Datasheet

LTC2238/LTC2237/LTC2236
8
223876fa
TYPICAL PERFOR A CE CHARACTERISTICS
UW
LTC2237: 8192 Point FFT,
f
IN
= 30MHz, –1dB, 2V Range,
40Msps
LTC2237: 8192 Point FFT,
f
IN
= 70MHz, –1dB, 2V Range,
40Msps
LTC2237: 8192 Point FFT,
f
IN
= 140MHz, –1dB, 2V Range,
40Msps
LTC2237: 8192 Point 2-Tone FFT,
f
IN
= 21.6MHz and 23.6MHz,
–1dB, 2V Range, 40Msps
LTC2237: Grounded Input
Histogram, 40Msps
LTC2237: SNR vs Input Frequency,
–1dB, 2V Range, 40Msps
LTC2237: SFDR vs Input Frequency,
–1dB, 2V Range, 40Msps
LTC2237: SNR and SFDR vs
Sample Rate, 2V Range,
f
IN
= 5MHz, –1dB
LTC2237: SNR vs Input Level,
f
IN
= 5MHz, 2V Range, 40Msps
FREQUENCY (MHz)
0
AMPLITUDE (dB)
–60
–30
–20
20
223876 G19
–70
–80
–120
5
10
15
–100
0
–10
–40
–50
–90
–110
FREQUENCY (MHz)
0
AMPLITUDE (dB)
–60
–30
–20
20
223876 G20
–70
–80
–120
5
10
15
–100
0
–10
–40
–50
–90
–110
FREQUENCY (MHz)
0
AMPLITUDE (dB)
–60
–30
–20
20
223876 G21
–70
–80
–120
5
10
15
–100
0
–10
–40
–50
–90
–110
FREQUENCY (MHz)
0
AMPLITUDE (dB)
–60
–30
–20
20
223876 G22
–70
–80
–120
5
10
15
–100
0
–10
–40
–50
–90
–110
CODE
70000
60000
50000
40000
30000
20000
10000
0
511
65520
512
223876 G23
510
0
0
COUNT
INPUT FREQUENCY (MHz)
0
SNR (dBFS)
59.5
60.5
200
223876 G24
58.5
57.5
50
100
150
62.5
61.5
INPUT FREQUENCY (MHz)
0
85
90
100
150
223876 G25
80
75
50 100 200
70
65
95
SFDR (dBFS)
SAMPLE RATE (Msps)
0
SNR AND SFDR (dBFS)
80
90
100
80
223876 G26
70
60
50
10 20 30
40 50
60 70
SFDR
SNR
INPUT LEVEL (dBFS)
–60
SNR (dBc AND dBFS)
30
40
50
–30
–10
223876 G27
20
10
0
–50 –40
dBFS
dBc
–20
60
70
80
0