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RF2948B - 2.4GHz SPREAD-SPECTRUM TRANSCEIVER

General Description

The RF2948B is a monolithic integrated circuit specifically designed for direct-sequence spread-spectrum systems operating in the 2.4GHz ISM band.

Key Features

  • 45MHz to 500MHz IF Quad Demod.
  • On-Chip Variable Baseband Filters.
  • Quadrature Modulator and Upconverter.
  • 2.7V to 3.6V Operation.
  • Part of IEEE802.11b Chipset FO BW CTRL 32 31 30 29 BW Control R DCFB Q 28 DC Feedback gm-C LPF gm-C LPF VREF1 BUF DCFB I 27 26 25 PD 1 N O T RX EN 2 Logic RX IF BIAS 3 REF DC Feedback Q OUT.
  • 2.4GHz PA Driver 24 I OUT TX Bias VCC1 4 RX IF IN 5 23 VCC4 TX IF IN 6 gm-C LPF 22 TXQ DATA VCC9 7 21.

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Full PDF Text Transcription for RF2948B (Reference)

Note: Below is a high-fidelity text extraction (approx. 800 characters) for RF2948B. For precise diagrams, and layout, please refer to the original PDF.

RF2948B 0 Typical Applications • IEEE 802.11b WLANs • Wireless Residential Gateways • Secure Communication Links Product Description The RF2948B is a monolithic integrate...

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cation Links Product Description The RF2948B is a monolithic integrated circuit specifically designed for direct-sequence spread-spectrum systems operating in the 2.4GHz ISM band. The part includes: a direct conversion from IF receiver with variable gain control; quadrature demodulator; I/Q baseband amplifiers; and, on-chip programmable baseband filters. For the transmit side, a QPSK modulator and upconverter are provided. The design reuses the IF SAW filter for transmit and receive reducing the number of SAW filters required. Two-cell or regulated three-cell (3.6V maximum) battery applications are supported by the part. T

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