PMB2362 Ver la hoja de datos (PDF) - Infineon Technologies

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PMB2362

Dual LNA

Infineon Technologies 

Confidential

PMB 2362

preliminary

Functional Description

3.4 Circuit Description

1. General Description

The PMB2362 is a dual band LNA circuit designed for dual band wireless fron-

tends with excellent performance.

2. LNA1

The LNA1 is designed for input frequencies between 0.9 and 1.0GHz. Entering

the IC at the base input pin AI1 the RF input signal is amplified in the LNA1

stage. The gain of this LNA stage is controlled by the DC level at pin GC and

can be adjusted in a 20 dB step. The LNA output is internal matched and at pin

AO1 the amplified and matched signal is available for further use.

3. LNA2

The LNA2 is designed for input frequencies between 1.8 and 1.9GHz. Entering

the IC at the base input pin AI2 the RF input signal is amplified in the LNA2

stage. The gain of this LNA stage is also controlled by the DC level at pin GC

and can be adjusted in a fixed gain step. The open collector LNA output at pin

AO2 has to be connected to VCC and external matching elements.

4. COMMON

VCC is the supply voltage for both LNAs. The grounding is done with the heat

sink at the bottom side of the package. An internal bias driver generates supply

voltage and temperature compensated reference voltages. The PD pin allows

the circuit to be switched in a low power consuming (sleeping) mode. All pins

with the exception of GND are ESD protected.

Wireless Components

3-4

Specification, January 2000

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