CMH192E6327 Infineon Technologies, CMH192E6327 Datasheet - Page 10

• Manufacturer Part Number: CMH192E6327
• Description: High-Linearity, PCS LNA/Mixer IC
• Manufacturer: Infineon Technologies

CMH192 - Preliminary Datasheet (Rev 4nl, 6/01)
Downconverter Gain Adjustment:
inductor L3 for the IFA. Higher inductance will give lower downconverter gain and
typically improve the IIP3.
Gain/Current Control Pins:
Other Notes:
inductor (e.g. Coilcraft) is recommended to achieve minimum NF.
These components should be placed in parallel close to pin 4. These elements may
require tuning depending on component vendor and board parasitics to achieve flat
conversion gain vs. frequency.
inductance between the LNA and RFA VDD pins and their bypass capacitors.
the current in High Gain mode (keeping VRCV and VMODE constant).
than 1 M
impedance.
The Downconverter gain can be adjusted by changing the source feedback
LOW = 0 to 0.3 V
HIGH = Vdd to (Vdd – 0.3) V
VGAIN – select between high and low gain states in the LNA.
VRCV - selects Current/Linearity mode (changes current in LNA/RFA/IFA)
Inductor L1 is critical for setting the Noise Figure of the LNA. A high Q wire wound
Inductor L5 and Capacitor C10 form a “tank circuit” to terminate the RF in the mixer.
Lower RF frequencies (i.e. Korean PCS or GPS) may be accommodated by adding
LNA current can be determined by subtracting the current in Low Gain mode from
Control lines (G_CNTL, VRCV and VMODE) have an input impedance of greater
when Vdd is ON. When VDD is off, they have approximately 20 K input
VGAIN = HIGH: LNA ON (~12 dB Gain, ~ 6.5 mA current)
VGAIN = LOW: LNA bypassed (~ 4 dB Loss, no current)
VRCV = LOW selects Reduced Current Mode
VRCV = HIGH selects High Linearity Mode.
GaAs MMIC
CMH192
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