
6
LTC1740
1740f
TYPICAL PERFOR A CE CHARACTERISTICS
UW
Spurious-Free Dynamic Range
vs Input Amplitude
S/(N + D) and SFDR
vs Sample Frequency
INPUT AMPLITUDE (dBFS)
–50
0
SFDR
(dBc
AND
dBFS)
50
60
70
80
90
100
dBFS
dBc
–40
–30
–20
–10
1740 G07
0
DUAL SUPPLIES
5V INPUT RANGE
DIFFERENTIAL INPUT
6Msps
Spurious-Free Dynamic Range
vs Input Amplitude
INPUT AMPLITUDE (dBFS)
–50
0
SFDR
(dBc
AND
dBFS)
50
60
70
80
90
100
dBFS
dBc
–40
–30
–20
–10
1740 G08
0
SINGLE SUPPLY
5V INPUT RANGE
DIFFERENTIAL INPUT
6Msps
SAMPLE FREQUENCY (MHz)
1
AMPLITUDE
(dBc)
75
80
85
5678
0
1740 G09
70
65
50
2
3
4
55
60
95
90
DUAL SUPPLIES
5V INPUT RANGE
DIFFERENTIAL INPUT
6Msps
SFDR
S/(N + D)
S/(N + D) and SFDR
vs Sample Frequency
Nonaveraged 4096 Point FFT
SAMPLE FREQUENCY (MHz)
1
AMPLITUDE
(dBc)
75
80
85
5678
0
1740 G10
70
65
50
2
3
4
55
60
95
90
SINGLE SUPPLY
5V INPUT RANGE
DIFFERENTIAL INPUT
6Msps
SFDR
S/(N + D)
FREQUENCY (MHz)
0
–20
–40
–60
–80
–100
–120
–140
1.5
2.5
1740 G11
0.5
1
23
AMPLITIDE
(dB)
DUAL SUPPLIES
6Msps
fIN = 2.5MHz, 5VP-P
DIFFERENTIAL INPUT
Nonaveraged 4096 Point FFT
FREQUENCY (MHz)
0
–20
–40
–60
–80
–100
–120
–140
1.5
2.5
1740 G12
0.5
1
23
AMPLITIDE
(dB)
SINGLE SUPPLY
6Msps
fIN = 2.5MHz, 5VP-P
DIFFERENTIAL INPUT
IDD vs Clock Frequency
ISS vs Clock Frequency
CLOCK FREQUENCY (MHz)
0
49
47
45
43
41
39
37
35
1740 G13
12
46
I DD
(mA)
VREF = 4.5V
VREF = 2.25V
CLOCK FREQUENCY (MHz)
0
I SS
(mA)
0.5
1.0
1.5
2.0
2.5
1
234
1740 G14
56