Datasheet

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SBAS279D − AUGUST 2003 − REVISED JULY 2005
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13
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 21
−
10
−
20
−
30
−
40
−
50
−
60
−
70
−
80
−
90
−
100
−
110
02 4681012 1614 18 20
Magnitude (dBm)
Frequency (MHz)
DUAL−TONE OUTPUT SPECTRUM
f
1
=1.2MHz
f
2
=2.2MHz
f
CLK
=40MSPS
Figure 22
−
10
−
20
−
30
−
40
−
50
−
60
−
70
−
80
−
90
−
100
−
110
02 4681012 1614 18 20
Magnitude (dBm)
Frequency (MHz)
FOUR−TONE OUTPUT SPECTRUM
f
1
=1.2MHz
f
2
=2.2MHz
f
3
=3.2MHz
f
4
=4.2MHz
f
CLK
=40MSPS
Figure 23
−
60
−
70
−
80
−
90
−
100
−
110
−
120
Channel Isolation (dBc)
024681012 1614 18 20
Frequency (MHz)
I−DAC CHANNEL ISOLATION vs f
OUT
AT 40MSPS
Channel 1
Channel 2
Figure 24
V−DAC, INL
0
16
12
8
4
0
−
4
−
8
−
12
−
16
500 1000 1500 2000 2500 3000 3500 4000
Codes
INL (LSB)
Figure 25
V−DAC, DNL
0
1.0
0.8
0.6
0.4
0.2
0
−
0.2
−
0.4
−
0.6
−
0.8
−
1.0
500 1000 1500 2000 2500 3000 3500 4000
Codes
DNL (LSB)
Figure 26
V
OUT
vs CODE
0
3.00
2.75
2.50
2.25
2.00
1.75
1.50
1.25
1.00
0.75
0.50
0.25
0
500 1000 1500 2000 2500 3000 3500 4000
Codes
V
OUT
(V)