LTC5598IUF LINER [Linear Technology], LTC5598IUF Datasheet - Page 11

• Manufacturer Part Number: LTC5598IUF
• Description: 5MHz to 1600MHz High Linearity Direct Quadrature Modulator
• Manufacturer: LINER [Linear Technology]

APPLICATIONS INFORMATION
Table 3. LOP Port Input Impedance vs Frequency for EN = Low
and P
Table 4. LOP Port Input Impedance vs Frequency for EN = High
and P
FREQUENCY
FREQUENCY
(MHz)
(MHz)
LO
LO
1000
1250
1500
1800
1000
1250
1500
1800
100
200
400
800
100
200
400
800
0.1
0.1
16
30
60
16
30
60
1
2
4
8
1
2
4
8
= 0dBm (LOM AC Coupled with 50Ω to Ground).
= 10dBm (LOM AC Coupled with 50Ω to Ground).
IMPEDANCE
1376 – j84.4
IMPEDANCE
541 – j1593
40.7 – j64.1
39.1 – j34.6
37.6 – j23.8
33.4 – j16.4
27.5 – j11.1
75.3 – j452
49.2 – j228
43.3 – j117
177 – j877
20.1 – j4.9
17.5 – j1.6
15.3 + j2.1
13.8 + j5.6
12.8 + j9.7
55.4-j61.6
45.7-j34.4
43.0-j24.1
38.0-j17.1
32.0-j12.5
LO INPUT
LO INPUT
360-j14.8
349-j70.5
81.3-j102
13.5+j2.4
12.0+j7.3
311-j113
240-j148
148-j146
23.6-j8.3
19.8-j5.6
15.8-j1.7
REFLECTION COEFFICIENT
REFLECTION COEFFICIENT
0.930
0.980
0.977
0.965
0.918
0.784
0.585
0.382
0.296
0.275
0.320
0.430
0.479
0.532
0.571
0.605
0.756
0.758
0.752
0.739
0.715
0.641
0.506
0.341
0.261
0.234
0.265
0.374
0.438
0.520
0.575
0.619
MAG
MAG
ANGLE
ANGLE
–12.2
–23.6
–41.8
–62.7
–10.9
–19.7
–35.2
–54.7
–77.4
–91.6
–102
–124
–145
–167
–176
–114
–137
–156
–165
–176
–0.3
–3.2
–6.2
–0.7
–3.2
–6.0
–86
175
167
157
174
162
Table 5. LOP Port Input Impedance vs Frequency for EN = Low
and P
FREQUENCY
(MHz)
LO
1000
1250
1500
1800
100
200
400
800
0.1
16
30
60
1
2
4
8
= 10dBm (LOM AC Coupled with 50Ω to Ground).
Figure 4. LOP Port Return Loss vs Frequency
for Standard Board (See Figure 10)
–10
–15
–20
–25
–5
0
1
C9, C10: 2.2pF; L1, L2: 3.3nH;
C5, C7: 10nF
IMPEDANCE
43.1 – j62.0
38.6 – j34.6
37.6 – j23.9
33.5 – j16.5
27.6 – j11.3
454 – j30.5
60.7 – j106
423 – j102
365 – j165
249 – j219
117 – j179
20.2 – j5.1
17.7 – j1.7
15.2 + j2.0
13.9 + j5.4
12.9 + j9.5
LO INPUT
EN = LOW; P
EN = LOW; P
EN = HIGH; P
EN = HIGH; P
10
FREQUENCY (MHz)
LO
LO
LO
LO
= 0dBm
= 10dBm
= 0dBm
= 10dBm
REFLECTION COEFFICIENT
100
0.802
0.780
0.796
0.798
0.781
0.697
0.559
0.386
0.297
0.274
0.319
0.429
0.478
0.533
0.570
0.604
MAG
LTC5598
1000
5598 F04
ANGLE
–11.4
–22.4
–40.3
–62.4
–86.7
–102
–124
–145
–166
–175
–0.9
–3.2
–5.9
175
167
158
11
5598f