![](http://datasheet.mmic.net.cn/Linear-Technology/LTC2248IUH-TRPBF_datasheet_105397/LTC2248IUH-TRPBF_7.png)
LTC2248/LTC2247/LTC2246
7
224876fa
SAMPLE RATE (Msps)
I VDD
(mA)
2248 G15
80
75
70
65
60
55
50
0
20
40
50
10
30
60
70
80
2V RANGE
1V RANGE
CLOCK DUTY CYCLE (%)
SNR
AND
SFDR
(dBFS)
2247 G12
100
95
90
85
80
75
70
30
40
50
55
35
45
60
65
70
SAMPLE RATE (Msps)
50
SNR
AND
SFDR
(dBFS)
110
100
90
80
70
60
100
2248 G11
60 70 80 90
010 20 30 40
110
SFDR: DCS ON
SNR: DCS ON
SNR: DCS OFF
SFDR: DCS OFF
INPUT LEVEL (dBFS)
–60
– 50
SNR
(dBc
AND
dBFS)
–40
–20
–30
–10
0
2248 G13
INPUT LEVEL (dBFS)
–60
– 50
– 40
–20
–30
–10
0
2248 G14
80
70
60
50
40
30
20
10
0
SFDR
(dBc
AND
dBFS)
120
110
100
90
80
70
60
50
40
30
20
dBFS
dBc
90dBc SFDR
REFERENCE LINE
SAMPLE RATE (Msps)
I OVDD
(mA)
2248 G16
6
5
4
3
2
1
0
20
40
50
10
30
60
70
80
CODE
0
INL
ERROR
(LSB)
12288
2247 G01
4096
8192
16384
2.0
1.5
1.0
0.5
0
–0.5
–1.0
–1.5
–2.0
CODE
0
DNL
ERROR
(LSB)
12288
2247 G02
4096
8192
16384
1.00
0.75
0.50
0.25
0
–0.25
–0.50
–0.75
–1.00
FREQUENCY (MHz)
AMPLITUDE
(dB)
2247 G03
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
–120
0
510
15
20
SNR
SFDR
TYPICAL PERFOR A CE CHARACTERISTICS
UW
LTC2248: SNR and SFDR vs
Sample Rate, 2V Range,
fIN = 5MHz, –1dB
LTC2248: SNR and SFDR vs
Clock Duty Cycle, 65Msps
LTC2248: SNR vs Input Level,
fIN = 30MHz, 2V Range, 65Msps
LTC2248: IOVDD vs Sample Rate,
5MHz Sine Wave Input, –1dB,
OVDD = 1.8V
LTC2248: IVDD vs Sample Rate,
5MHz Sine Wave Input, –1dB
LTC2247: Typical INL,
2V Range, 40Msps
LTC2247: Typical DNL,
2V Range, 40Msps
LTC2247: 8192 Point FFT,
fIN = 5MHz, –1dB, 2V Range,
40Msps
LTC2248: SFDR vs Input Level,
fIN = 30MHz, 2V Range, 65Msps