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SKY74691 - Receiver for CDMA Mobile Handset Applications

General Description

DataShee CELL_LNA_OUT RF_BIAS_RES CELL_MIX_IN MIX_VCC GND CELL_LNA_IN GND N/C GND N/C VCC_RF_BIAS LNA_BIAS_RES LNA_0 LNA_1 VCO_ON VCO_DEC_CAP VCO_TUNE 1 2 3 4 5 6 7 8 9 10 11 12 13 48 47 46 45 44 43 42 41 40 39 38 MODE_0 LO_IN GND N/C GND N/C N/C 37 36 35 34 33 32 31 30 29 28 27 26

Key Features

  • Three-step gain control, cellular LNA.
  • External resistor to adjust LNA bias current.
  • Buffered LO signal for transmit upconverter.
  • VGA with 90 dB dynamic range.
  • Integrated IF VCO and tank circuit.
  • VCO_ON auto-tuning control.
  • Battery cell operation (2.7 V < VCC < 3.3 V).
  • RFLGA™ (48-pin, 7 x 7 mm) Pb-free package (MSL3, 260 °C per JEDEC-J-STD-020) with downset paddle The device package and pinout for the 48-pin RF Land Grid A.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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www.DataSheet4U.com PRODUCT SUMMARY SKY74691: Receiver for CDMA Mobile Handset Applications Applications • Single mode CDMA handsets After RF LNA signal amplification and filtering from the antenna, the received signal is downconverted from RF to the Intermediate Frequency (IF). The LO_IN signal (pin 39) provides a Local Oscillator (LO) port for the RF mixer. The UHF Voltage Controlled Oscillator (VCO) is buffered and amplified internally, and provides the LO to drive the LO port of a transmitter upconverter (such as Skyworks CX74002). The Variable Gain Amplifier (VGA) has a minimum dynamic range of 90 dB with a control voltage range of 0.2 to 2.7 V. A VHF oscillator operates with an internal tank circuit to provide LO frequencies for the I/Q demodulator.