HMC1190LP6GE
v01.1112
BROADBAND HIGH IP3 DUAL CHANNEL DOWNCONVERTER
w/ Fractional-N PLL & VCO, 0.7 - 3.5 GHz
Table 2b. LOBIAS2 voltage vs LO Amplifier Currents
LOBIAS Jumper, J12 (V)
LOBIAS2 Pin (V)
LO Amp (mA)
R71=R57
4.75
157
110 Ohms
4.4
4.05
3.7
150
143
135
128
270 Ohms
420 Ohms
580 Ohms
740 Ohms
5.0 V
3.36
External RF Matching
The HMC1190LP6GE`s RF inputs are internally broadband matched to 50Ω. RF inputs can be externally matched
for a specific RF frequency band of interest to further improve Input IP3 (IIP3). Matching RF inputs to a specific RF
frequency band can be easily accomplished by adding a series inductor and a shunt capacitor. See Table 3 for values
of the external matching components for corresponding RF frequency bands. Application circuit with the external
components on RF input pins can be seen at Figure 7.
VGATE1, VGATE2 pin voltages can be optimized for a specific RF frequency band by changing the resistor values in
series with these pins. Table-1 shows the resistor values (R54, R56) for corresponding VGATE pin voltage.
Figure 4, Figure 5, and Figure 6 show the measured conversion gain, IIP3 and OIP3 for 900MHz, 1900MHz and
2500MHz RF frequency bands.
18
15
12
9
40
38
36
34
32
30
28
26
24
22
20
18
30
25
20
15
10
5
INPUT IP3
CONVERSION GAIN
6
+25C
+85C
-40C
+25C
+85C
-40C
3
0
0
0.7
0.8
0.9
1
1.1
700
800
900
FREQUENCY (MHz)
1000
1100
FREQUENCY (GHz)
[1]
Figure 4. Conversion gain, IIP3 and OIP3 for 900MHz RF frequency band.
[1] Balun losses at IF output ports are de-embedded.
For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824
Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
36
HITTITE [ HITTITE MICROWAVE CORPORATION ]
