LT5520EUF Linear Technology, LT5520EUF Datasheet - Page 8

• Manufacturer Part Number: LT5520EUF
• Description: IC MIXER UPCONV 1.3-2.3GHZ 16QFN
• Manufacturer: Linear Technology
• Series: LT5520r

Specifications of LT5520EUF

• Rf Type: General Purpose
• Frequency: 1.3GHz ~ 2.3GHz
• Number Of Mixers: 1
• Gain: -1dB
• Noise Figure: 15dB
• Secondary Attributes: Up Converter
• Current - Supply: 70mA
• Voltage - Supply: 4.5 V ~ 5.25 V
• Package / Case: 16-WQFN Exposed Pad
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Industrial
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

LT5520
APPLICATIO S I FOR ATIO
The impedance data for the RF output, listed in Table 3, can
be used to develop matching networks for different load
impedances.
Table 3. Single-Ended RF Output Impedance
Operation at Different Input Frequencies
On the evaluation board shown in Figure 10, the input of
the LT5520 can be easily matched for different frequencies
by changing the input capacitors, C1 and C2. Table 4 lists
some actual values used at selected frequencies.
Table 4. Input Capacitor Values vs Frequency
8
Frequency
(MHz)
1300
1500
1700
1900
2100
2300
2500
2700
Frequency
(MHz)
140
240
480
650
70
Figure 5. RF Output Circuit
38.9 + j5.41
38.7 + j7.78
41.1 – j9.51
U
26.9 + j38.2
53.9 + j20.6
49.5 + j7.97
42.8 + j4.14
44.2 + j35.7
Impedance
V
8
CC
Input
U
Capacitance (C1, C2)
W
LT5520
RF
RF
V
5520 F05
0.520
0.359
0.198
0.080
0.089
0.139
0.154
0.142
Mag
CC
+
–
(pF)
820
220
68
18
12
11
10
S11
U
RF
50
Angle
OUT
94.7
78.4
68.0
88.9
148
151
140
127
The performance was evaluated with the input tuned for
each of these frequencies and the results are summarized
in Figures 6-8. The same IF input balun transformer was
used for all measurements. In each case, the LO input
frequency was adjusted to maintain an RF output fre-
quency of 1900 MHz.
Figure 7. SSB Noise Figure vs Tuned IF Input Frequency
–4
–1
–2
–3
–5
5
4
3
2
1
0
18
17
16
15
14
13
0
GAIN
Figure 6. Conversion Gain and IIP3
IIP3
0
100
vs Tuned IF Input Frequency
100
INPUT FREQUENCY (MHz)
200
INPUT FREQUENCY (MHz)
200
HIGH SIDE LO
LOW SIDE LO
300
300
HIGH SIDE LO
P
LO
400
LOW SIDE LO
400
= –5dBm
HIGH SIDE LO
LOW SIDE LO
500
P
500
LO
= 0dBm
600
600
5520 F06
5520 F07
700
700
20
18
16
14
12
10
8
6
4
2
0
5520f