BGX7220 データシートの表示（PDF） - NXP Semiconductors.

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BGX7220

Dual receiver down mixer

NXP Semiconductors. 

NXP Semiconductors

5. Functional diagram

BGX7220

Dual receiver down mixer

1

RF_A

27

LO_IN

MIXER A

33

IF_OUT_P_A

32

IF_OUT_N_A

BGX7220

RF_B

9

MIXER B

14

IF_OUT_N_B

13

IF_OUT_P_B

aaa-002507

Fig 1. Functional block diagram

Each mixer, A and B employs a transformer to convert the single-ended RF input into a

differential signal to drive the passive MOS mixer. The MOS mixer directly drives the IF

amplifier. Its open-collector outputs deliver the differential signal into an external

transformer load, referenced to the 5 V supply for maximum signal swing. Each mixer can

be independently powered-off by a combination of POFF_1 and POFF_2 (see Table 3.)

The dual paths allow diversity operation with a common LO path. A transformer at the LO

input converts the single-ended RF into a differential signal to drive the LO buffer chain.

The plastic package has an under-side heat-sink paddle which serves as a good RF

ground.

6. Pinning information

6.1 Pinning

Viewing the device from the top (see Figure 2), the 2 RF input ports are at the left, the

common LO input at the right, with IF outputs at the top and bottom. Multiple power and

ground pins allow for independent supply domains to improve isolation between blocks.

BGX7220

Product data sheet

All information provided in this document is subject to legal disclaimers.

Rev. 1. — 8 August 2012

© NXP B.V. 2012. All rights reserved.

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