HMC1190LP6GE Datasheet, PDF (39/44 Pages) Hittite Microwave Corporation – Wideband Radio Receivers

HMC1190LP6GE
v01.1112
BROADBAND HIGH IP3 DUAL CHANNEL DOWNCONVERTER
w/ Fractional-N PLL & VCO, 0.7 - 3.5 gHz
Input IP3 Dependence on RF Input Power
The HMC1190LP6GE accepts a wide range of RF input power. Figure 9 shows the IIP3 vs. RF input power for 1900
MHz RF and 150 MHz IF.
31
29
27
25
23
21
19
17
1900 MHz
15
-10
-8
-6
-4
-2
0
RF POWER (dBm)
Figure 9. IIP3 vs. RF Input Power, RF= 1900 MHz, IF= 150 MHz, VGATE= 4.8V
Enabling / Disabling Mixer Features
HMC1190LP6GE has a dual channel down converter core but it can also be configured as a single channel one. When
single channel option is desired, HMC1190LP6GE`s unused IF amplifier can be disabled through SPI interface.
HMC1190LP6GE can also be used as standalone PLL/VCO. In this case all IF and LO buffer amplifiers at mixer side
can be disabled through SPI interface. Value of Reg14 should be changed in order to make necessary enable/disable
changes. See Table 4 for details.
Table 4. Mixer Enable / Disable
REG14h value
3F4
3F2
3F6
3F0
Function
IF2 disabled, IF1 and LO_Mixer enabled
IF1 disabled, IF2 and LO_Mixer enabled
IF1, IF2 and LO_Mixer disabled
IF1, IF2 and LO_Mixer enabled
USING AN EXTERNAL VCO
In order to configure HMC1190LP6GE to use with an external VCO, Register 17 needs to be configured to disable the
on chip VCO and VCO to PLL path. Enable External Buffer, second CP link and External I/O switch. To make these
changes Reg 17 [0:11] should be configured as 3157d.
Figure 10 shows HMC1190LP6GE configured as PLL alone used with External VCO HMC384LP4E. Loop Filter
components are used as below.
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39
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