LTC2247 Linear Technology, LTC2247 Datasheet - Page 7

• Manufacturer Part Number: LTC2247
• Description: (LTC2246 - LTC2248) 65/40/25Msps Low Power 3V ADCs
• Manufacturer: Linear Technology

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TYPICAL PERFOR A CE CHARACTERISTICS
–0.5
–1.0
–1.5
–2.0
110
100
120
110
100
2.0
1.5
1.0
0.5
90
80
70
60
90
80
70
60
50
40
30
20
0
–60
LTC2247: Typical INL,
2V Range, 40Msps
0 10 20 30 40
0
LTC2248: SNR and SFDR vs
Sample Rate, 2V Range,
f
LTC2248: SFDR vs Input Level,
f
IN
IN
= 5MHz, –1dB
= 30MHz, 2V Range, 65Msps
–50
dBFS
4096
SAMPLE RATE (Msps)
INPUT LEVEL (dBFS)
–40
dBc
50
CODE
8192
–30
SFDR
SNR
60 70 80 90
90dBc SFDR
REFERENCE LINE
–20
12288
W
–10
100
2248 G11
2248 G14
2247 G01
U
16384
110
0
–0.25
–0.50
–0.75
–1.00
1.00
0.75
0.50
0.25
100
80
75
70
65
60
55
50
95
90
85
80
75
70
0
30
0
0
LTC2248: SNR and SFDR vs
Clock Duty Cycle, 65Msps
LTC2248: I
5MHz Sine Wave Input, –1dB
LTC2247: Typical DNL,
2V Range, 40Msps
SFDR: DCS ON
SNR: DCS ON
SNR: DCS OFF
2V RANGE
35
10
SFDR: DCS OFF
4096
40
20
CLOCK DUTY CYCLE (%)
SAMPLE RATE (Msps)
VDD
45
30
vs Sample Rate,
CODE
8192
50
40
LTC2248/LTC2247/LTC2246
55
50
1V RANGE
12288
60
60
65
70
2247 G12
2248 G15
2247 G02
16384
80
70
–100
–110
–120
–10
–20
–30
–40
–50
–60
–70
–80
–90
80
70
60
50
40
30
20
10
0
6
5
4
3
2
1
0
0
–60
LTC2248: SNR vs Input Level,
f
0
0
IN
LTC2248: I
5MHz Sine Wave Input, –1dB,
O
LTC2247: 8192 Point FFT,
f
40Msps
IN
VDD
= 30MHz, 2V Range, 65Msps
= 5MHz, –1dB, 2V Range,
10
–50
= 1.8V
20
5
SAMPLE RATE (Msps)
INPUT LEVEL (dBFS)
– 40
FREQUENCY (MHz)
OVDD
dBFS
30
dBc
–30
40
vs Sample Rate,
10
50
–20
60
15
–10
70
224876fa
2248 G13
2247 G03
2248 G16
7
80
20
0