General Description
The MAX7058 UHF transmitter alternately transmits ASK/OOK data at 315MHz or 390MHz using a single crystal. The MAX7058 has internal tuning capacitors at the output of the power amplifier that can be programmed for matching to the antenna or load. The MAX7058 can transmit at a data rate up to 100kbps NRZ (50kbps Manchester coded). Typical transmitted power into a 50Ω load is +10dBm. The MAX7058 operates from +2.1V to +3.6V and draws under 8.0mA of current. The standby current is less than 1μA at room temperature. A 15MHz crystal is used as the reference for 315MHz and 390MHz operation by selecting synthesizer-divide ratios of 21 and 26, respectively.

FEATUREs
♦ Switched 315MHz/390MHz Carrier Frequency Using One Crystal
♦ +2.1V to +3.6V Single-Supply Operation
♦ ASK/OOK Modulation
♦ Internal Switched Capacitors for Optimum DualFrequency Operation
♦ 8.0mA DC Current Drain (50% Duty Cycle OOK)
♦ 0.8µA Standby Current
♦ Small 4mm x 4mm, 24-Pin Thin QFN Package

APPLICATIONs
   Garage Door Openers
   RF Remote Controls
   Home Automation
   Wireless Sensors
   Security Systems
   Automotive