HMC1190LP6GE
v01.1112
BROADBAND HIGH IP3 DUAL CHANNEL DOWNCONVERTER
w/ Fractional-N PLL & VCO, 0.7 - 3.5 GHz
Table 1 shows the typical resistor values that need to be added in series with VGATE1, VGATE2 pins for different
VGATE voltages.A fine tune for R54 and R56 resistors can be used if a better fit is required.
Table 1. Resistor values for Different VGATE Pin Voltages
VGATE1=VGATE2
R54=R56
4.7 V
174 Ohms
4.8 V
4.9 V
5.0 V
120 Ohms
56 Ohms
0 Ohm
VCS Interface and LOBIAS Interface
VCS1, VCS2 pins are bias pins for IF amplifiers on each channel and set the reference currents to these IF amplifiers.
The VCS voltage is generated from the 5V supply by series resistors. Higher IIP3 values can be obtained by changing
the values of these series resistors R61 and R73, which will change the total supply current of the IF amplifiers which
can be seen on Table 2a.
LOBIAS1, LOBIAS2 pins are bias pins for LO amplifiers and set the reference currents to these LO amplifiers. The
LOBIAS voltage is generated from the 5V supply by series resistors R71 and R57. Changing LOBIAS2 voltage,
changes current consumed by LOVDD pin, which can be seen at Table 2b.
HMC1190LP6GE`s flexible design allows users to choose best configuration for their needs. For higher power
consumption, better OIP3 values can be achieved.
10
28
26
24
22
20
18
16
9
8
7
LOBIAS2= +3.35V
LOBIAS2= +3.70V
LOBIAS2= +4.05V
LOBIAS2= +4.40V
LOBIAS2= +4.75V
6
LOBIAS2= +3.35V
LOBIAS2= +3.70V
LOBIAS2= +4.05V
LOBIAS2= +4.40V
LOBIAS2= +4.75V
5
4
3.2
3.5
3.6
3.9
4
4.2
3.2
3.5
3.6
3.9
4
4.2
VCS (V)
VCS (V)
[1]
Figure 3. Conversion Gain, IIP3 vs.VCS1, VCS2 and LOBIAS2 voltages at 1900 MHz RF Input.
Figure 3 shows the measured conversion gain and IIP3 vs. VCS and LOBIAS2 voltages at 1900MHz.Conversion gain
and IIP3 vs. VCS and LOBIAS2 voltages at 1900MHz.
Table 2a. VCS voltage vs IF Amplifier Currents
VCS Jumper, J13 (V)
VCS Pin (V)
IF Amp (mA)
R61=R73
4.25
181
440 Ohms
4.0
3.75
3.5
159
135
110
86
590 Ohms
740 Ohms
880 Ohms
1 KOhms
5.0 V
3.25
[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
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