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SKY74702 - Transmitter for CDMA Applications

Description

The SKY74702 device is a single-supply, monolithic integrated circuit.

It is designed for use in single-mode Code Division Multiple Access (CDMA) cellular voice/data applications including extensions for CDMA-Japan.

Features

  • Serial bus interface control.
  • Low power consumption in all operating modes.
  • Image reject upconverter replaces external RF SAW filter.
  • Transmit power control with 90 dB dynamic range.
  • Variable gain RF block for improved in-band SNR.
  • VHF VCO (external tank), 200 to 700 MHz.
  • VHF VCO switching to increase the talk time of the radio.
  • Two separate PLL synthesizers provide dual-loop, multi-band operation and power-save mode for bo.

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Datasheet Details

Part number SKY74702
Manufacturer Skyworks Solutions
File Size 220.73 KB
Description Transmitter for CDMA Applications
Datasheet download datasheet SKY74702 Datasheet

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Full PDF Text Transcription

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www.DataSheet4U.com PRODUCT SUMMARY SKY74702: Transmitter for CDMA Applications Applications • CDMA phones in the cellular band: ⎯ CDMA-US ⎯ CDMA-Japan The signal enters the chip as a baseband I/Q signal, which is upconverted by an I/Q quadrature modulator. The resulting signal is fed through a VGA to provide variable output power. After leaving the open collector output of the VGA, the signal enters a switch matrix. This switch matrix allows the signal to be routed through an external filter, or it can be filtered by the tuned collector load and passed directly to the UHF image reject mixer. The image reject mixer is internally connected to the PA driver.
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