SA9504 - Philips

SA9504 Dual-band / PCSCDMA/AMPS LNA and downconverter mixers

The SA9504 is an integrated receiver front-end for 900 MHz Cellular (AMPS) and 1.9 GHz PCS (CDMA) phones. This dual-band receiver circuit has low noise amplifiers and downconverters for both bands, and provides an elegant solution for RF-to-IF conversion. The two cascode LNAs have been designed to provide high gain with very low noise figures and high linear.

Features

LNA typical performance PARAMETER Gain (dB) Noise figure (dB) Input IP3 (dBm) Current (mA) Cellular LNA 16.5 1.6
  –2 4.9 PCS (CDMA) LNA 14.8 2 1 4.9
• Separate, selectable IF outputs to suit FM and CDMA bandwidths
• Buffered Cellular and PCS LO inputs
• Integrated frequency doubler for PCS mixer LO
• Differential (Tx) LO output buffer (can be switched on or off)
• Low voltage operation down to 2.7 volts
• Mixers current consumption with (Tx) LO buffer on:
  – Cellular FM: 17.4 mA
  – PCS: 27.6 mA
• Low standby current in sleep mode: <50 µA
• Small LQFP32 package APPLICATIONS
• LNAs for both Cell.