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MAX7058 315MHz/390MHz Dual-Frequency ASK Transmitter

Transmit 315MHz/390MHz with One Crystal While Keeping Your Antenna Matched

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Status

Active: In Production.

Description

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The MAX7058 UHF transmitter alternatively 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.

The MAX7058 is available in a 4mm × 4mm, 24-pin thin QFN package and is specified to operate in the –40°C to +125°C automotive temperature range.

Key Features Applications/Uses

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

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