Datasheet

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
90010
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
dBFS
dBc
dBc
90dBc SFDR
REFERENCE LINE
SAMPLE RATE (Msps)
I
OVDD
(mA)
2248 G16
6
5
4
3
2
1
0
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
5101520
SNR
SFDR
TYPICAL PERFOR A CE CHARACTERISTICS
UW
LTC2248: SNR and SFDR vs
Sample Rate, 2V Range,
f
IN
= 5MHz, –1dB
LTC2248: SNR and SFDR vs
Clock Duty Cycle, 65Msps
LTC2248: SNR vs Input Level,
f
IN
= 30MHz, 2V Range, 65Msps
LTC2248: I
OVDD
vs Sample Rate,
5MHz Sine Wave Input, –1dB,
O
VDD
= 1.8V
LTC2248: I
VDD
vs Sample Rate,
5MHz Sine Wave Input, –1dB
LTC2247: Typical INL,
2V Range, 40Msps
LTC2247: Typical DNL,
2V Range, 40Msps
LTC2247: 8192 Point FFT,
f
IN
= 5MHz, –1dB, 2V Range,
40Msps
LTC2248: SFDR vs Input Level,
f
IN
= 30MHz, 2V Range, 65Msps