SA9504 Datasheet, PDF (2/22 Pages) NXP Semiconductors – Dual-band, PCSCDMA/AMPS LNA and downconverter mixers

Philips Semiconductors
Dual-band, PCS(CDMA)/AMPS
LNA and downconverter mixers
Preliminary specification
SA9504
DESCRIPTION
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 linearity. The downconverter
portion is based on the Philips SA9502. There are two individual
mixer blocks, each optimized for low noise figure and high linearity.
The whole circuit is designed for low power consumption, high
performance, and is compatible with the requirements for Cellular
(AMPS) and PCS (CDMA) handsets.
The circuit has been designed in our advanced QUBiC3 BiCMOS
process with 30 GHz f_T and 60 GHz f_MAX.
FEATURES
LNA typical performance
PARAMETER
Cellular LNA PCS (CDMA) LNA
Gain (dB)
16.5
14.8
Noise figure (dB)
1.6
2
Input IP3 (dBm)
–2
1
Current (mA)
4.9
4.9
• LNAs for both Cellular (AMPS) and PCS (CDMA) bands
• High gain, low noise figure, high linearity performance
• Cascode output structure requiring no external matching
• Low power consumption, typical 4.9 mA
• Low voltage operation down to 2.7 volts
Downconverter typical performance
PARAMETER
Cellular FM
PCS (CDMA)
Gain (dB)
7.5
11.5
Noise Figure (dB)
10
9
Input IP3 (dBm)
5
4
Current (mA)
6.9
17
(Tx) LO output buffer off
• 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
• 800 MHz analog FM and receivers
• 1.9 GHz PCS (CDMA) digital receivers
• Supports dual-band operation
• Digital mobile communications equipment
• Portable, low power radio equipment
1999 Oct 28
2