LTC2228/LTC2227/LTC2226
7
222876fb
TYPICAL PERFORMANCE CHARACTERISTICS
LTC2228: SFDR vs Input Frequency,
–1dB, 2V Range, 65Msps
LTC2228: SNR and SFDR vs Clock
Duty Cycle, 65Msps
LTC2228: SNR vs Input Level,
f
IN
= 30MHz, 2V Range, 65Msps
LTC2228: SFDR vs Input Level,
f
IN
= 30MHz, 2V Range, 65Msps
LTC2228: I
VDD
vs Sample Rate,
5mHz Sine Wave Input, –1dB
LTC2228: I
OVDD
vs Sample Rate,
5MHz Sine Wave Input, –1dB,
OV
DD
= 1.8V
LTC2228: SNR and SFDR vs Sample
Rate, 2V Range,f
IN
= 5MHz, –1dB
INPUT FREQUENCY (MHz)
0
100
95
90
85
80
75
70
65
150
2228 G10
50 100 200
SFDR (dBFS)
SAMPLE RATE (Msps)
0
SNR AND SFDR (dBFS)
110
100
90
80
70
60
80
2228 G11
20
40
60
100
SNR
SFDR
CLOCK DUTY CYCLE (%)
30
SNR AND SFDR (dBFS)
60
2228 G12
40 50 70
100
95
90
85
80
75
70
65
35 45 55 65
SFDR: DCS ON
SFDR: DCS OFF
SNR: DCS ON
SNR: DCS OFF
INPUT LEVEL (dBFS)
–60 –50
SNR (dBc AND dBFS)
–40 –20–30
–10
0
2228 G13
80
70
60
50
40
30
20
10
0
dBFS
dBc
INPUT LEVEL (dBFS)
–60 –50 –40 –20–30
–10
0
SFDR (dBc AND dBFS)
2228 G14
120
110
100
90
80
70
60
50
40
30
20
dBFS
dBc
90dBc SFDR
REFERENCE LINE
SAMPLE RATE (Msps)
0
80
75
70
65
60
55
50
60
2228 G15
20 40 805010 30 70
I
VDD
(mA)
2V RANGE
1V RANGE
SAMPLE RATE (Msps)
I
OVDD
(mA)
2228 G16
6
5
4
3
2
1
0
0
20
40
50
10 30
60
70
80
