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315MHz/390MHz Dual-Frequency ASK Transmitter

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

Product Details

Key Features

Applications/Uses

Parametric specs for ISM RF Transmitters < 1GHz
Band/ Freq. (MHz) 300 to 450
Tx Output Power (dBm) (max) 10
Modulation Mode ASK
OOK
VSUPPLY (V) 2.1 to 3.6
Package/Pins TQFN/24
Budgetary
Price (See Notes)
1.52
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Simplified Block Diagram

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Parameters

Parametric specs for ISM RF Transmitters < 1GHz
Band/ Freq. (MHz) 300 to 450
Tx Output Power (dBm) (max) 10
Modulation Mode ASK
OOK
VSUPPLY (V) 2.1 to 3.6
Package/Pins TQFN/24
Budgetary
Price (See Notes)
1.52

Key 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 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

Applications/Uses

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

Description

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.

Simplified Block Diagram

MAX7058: Functional Block Diagram MAX7058: Functional Block Diagram Zoom icon

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .