Product Description
The TQ9203 RFIC Downconverter is a multifunction RF front end designed for the high dynamic range cellular communications standards. The design of the TQ9203 provides a 2.5dB system noise figure for excellent sensitivity, and a good signal range with –10dBm input IP3. Its low current consumption, single +5V operation and small, plastic surface-mount package are ideally suited for cost-competitive, space limited and portable applications. In addition, two selectable RF inputs simplify implementation of “antenna diversity”in applications such as CDPD. The TQ9203 is specified over a RF frequency range of 800 to 1000MHz, and therefore may be used for any of the cellular and cordless telephony standards.

Features
■ +5-V single supply
■ Internal buffer amplifier on mixer LO port
■ On-chip matching to 50W
■ Two selectable RF inputs
■ Low-cost SO-14 plastic package
■ 21dB system gain
■ -10dBm typical input intercept point
■ 2.5dB typ. system noise figure
■ 10.5mA typ. operating current

Applications
■ Cellular Communications
■ Spread-Spectrum Receivers
■ Cordless Phones