
8
LTC1742
1742f
TYPICAL PERFOR A CE CHARACTERISTICS
UW
SFDR vs Input Frequency and
Amplitude, 3.2V Range,
2nd and 3rd Harmonic
SFDR vs Input Frequency and
Amplitude, 2V Range,
2nd and 3rd Harmonic
Shorted Input Histogram
SNR vs Input Frequency
3.2V and 2V Range
SNR vs Sample Rate, 5MHz Input, –
1dB, 3.2V Range
Supply Current vs Sample Rate
SFDR vs Sample Rate, 5MHz Input,
–1dB, 3.2V Range
INPUT FREQUENCY (MHz)
0
SFDR
(dBFS)
75
80
85
60
100
1742 G25
70
65
60
20
40
80
90
95
100
–20dB
–10dB
–6dB
–1dB
TA = 25°C
INPUT FREQUENCY (MHz)
0
SFDR
(dBFS)
75
80
85
60
100
1742 G26
70
65
60
20
40
80
90
95
100
–6dB
–1dB
TA = 25°C
–10dB
–20dB
CODE
8140
0
COUNT
10000
15000
20000
8144
35000
TA = 25°C
1742 G27
5000
8142
8141
8145
8147
8146
8143
25000
30000
INPUT FREQUENCY (MHz)
10
SNR
(dBFS)
75.0
76.0
3.2V RANGE
TA = 25°C
2V RANGE
77.0
80
1742 G28
74.0
73.0
74.5
75.5
76.5
73.5
72.5
72.0
71.5
30
60
20
090
40 50
70
100
SAMPLE RATE (Msps)
0
72
SNR
(dBFS)
73
75
76
77
20
40
50
90
1742 G29
74
10
30
60
70
80
78
TA = 25°C
SAMPLE RATE (Msps)
0
SFDR
(dBFS)
80
85
90
80
1742 G30
75
70
60
20
40
60
10
90
30
50
70
65
100
95
TA = 25°C
SAMPLE RATE (Msps)
0
210
SUPPLY
CURRENT
(mA)
220
230
240
250
260
270
TA = 25°C
20
40
60
80
1742 G31