
8
LTC1747
1747fa
TYPICAL PERFOR A CE CHARACTERISTICS
UW
SNR vs Input Frequency,
–1dB, 3.2V Range
INPUT FREQUENCY (MHz)
0
69.5
SNR
(dBFS)
70.0
70.5
71.0
71.5
72.5
20
40
60
80
1747 G25
100
72.0
TA = 25°C
SFDR vs Sample Rate, 5MHz Input
–1dB, 3.2V Range
SAMPLE RATE (Msps)
0
SFDR
(dBFS)
TA = 25°C
80
1747 G26
20
40
60
100
98
96
94
92
90
88
86
84
82
80
SNR vs Sample Rate, 5MHz Input
–1dB, 3.2V Range
SAMPLE RATE (Msps)
0
SNR
(dBFS)
71.5
72.0
72.5
60
100
1747 G27
71.0
70.5
70.0
20
40
80
73.0
73.5
74.0
TA = 25°C
Supply Current (IVDD)
vs Sample Rate
SAMPLE RATE (Msps)
0
280
290
300
TA = 25°C
80
1747 G28
270
260
20
40
60
100
250
240
230
I VDD
(mA)
TEMPERATURE (
°C)
–50
ERROR
(LSB)
6
GAIN ERROR
OFFSET ERROR
10
1747 G03
0
–4
–30
–10
30
–6
–8
8
4
2
–2
50
70
90
Offset and Gain Error
vs Temperature
INPUT FREQUENCY (MHz)
0
SFDR
(dBFS)
75
80
85
150
250
1747 G29
70
65
60
50
100
200
90
95
100
4TH OR HIGHER HARMONIC
2ND OR 3RD HARMONIC
INPUT FREQENCY (MHz)
0
69.5
70.0
70.5
200
1747 G30
69.0
68.5
50
100
150
250
68.0
67.5
67.0
SNR
(dBFS)
High Input Frequency SFDR,
–1dB, 2V Range
High Input Frequency SNR,
–1dB, 2V Range