Datasheet

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SBAS279D − AUGUST 2003 − REVISED JULY 2005
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11
TYPICAL CHARACTERISTICS (continued)
T
A
= +25°C, +V
A
= +V
AV
= +3V, +V
D
= +V
DV
= +3V, I
OUTFS
= 2mA, differential transformer-coupled output (n = 4:1), R
L
= 400Ω on I-DAC,
R
L
= 2kΩ on V-DAC, and GSET = H unless otherwise noted.
Figure 9
80
75
70
65
60
55
50
SFDR (dBc)
0 2 4 6 8 10 12 1614 18 20
f
OUT
(MHz)
SFDR vs I
OUT
FS AND f
OUT
AT 40 MSPS, 0d BFS
1.5mA
0.5mA
1mA
2mA
Figure 10
SFDR vs TEMPERATURE
−
40
80
75
70
65
60
55
50
−
30 70
−
20 40 6050 80 85
−
10 0 10 20 30
Temperature (
_
C)
SFDR (dBc)
2.2MHz, 40MSPS
1MHz, 20MSPS
10MHz, 40MSPS
19.9MHz, 40MSPS
Figure 11
TOTAL HARMONIC DISTORTION vs
f
CLK
AT f
OUT
=2.2MHZ
5
−
60
−
65
−
70
−
75
−
80
40353025201510
f
CLK
(MSPS)
THD (dBc)
Figure 12
TOTAL HARMONIC DISTORTION vs TEMPERATURE
f
OUT
= 1MHz at 20MSPS
−
40
−
50
−
55
−
60
−
65
−
70
−
75
−
80
−
85
−
90
−
30 70
−
20 40 6050 80 85
−
10 0 10 20 30
Temperature (
_
C)
THD (dBc)
Figure 13
1.223
1.222
1.221
1.220
1.219
1.218
1.217
1.216
1.215
V
REF
(V)
−
40
−
20 0 20 40 60 80 85
Temperature (
_
C)
REFERENCE VOLTAGE vs TEMPERATURE
Figure 14
1.2201
1.2200
1.2199
V
REF
(V)
2.72.82.93.03.13.23.3
Supply Voltage (V)
REFERENCE VOLTAGE vs SUPPLY VOLTAGE