MAX7030

Low-Cost, 315MHz and 433.92MHz ASK Transceiver with Fractional-N PLL


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Description

The MAX7030 crystal-based, fractional-N transceiver is designed to transmit and receive ASK/OOK data at factory-preset carrier frequencies of 315MHz or 433.92MHz with data rates up to 33kbps (Manchester encoded) or 66kbps (NRZ encoded). This device generates a typical output power of +10dBm into a 50Ω load and exhibits typical sensitivity of -114dBm. The MAX7030 features separate transmit and receive pins (PAOUT and LNAIN) and provides an internal RF switch that can be used to connect the transmit and receive pins to a common antenna.

The MAX7030 transmit frequency is generated by a 16-bit, fractional-N, phase-locked loop (PLL), while the receiver's local oscillator (LO) is generated by an integer-N PLL. This hybrid architecture eliminates the need for separate transmit and receive crystal reference oscillators because the fractional-N PLL is preset to be 10.7MHz above the receive LO. Retaining the fixed-N PLL for the receiver avoids the higher current-drain requirements of a fractional-N PLL and keeps the receiver current drain as low as possible. All frequency generation components are integrated on-chip, and only a crystal, a 10.7MHz IF filter, and a few discrete components are required to implement a complete antenna/digital data solution.

The MAX7030 is available in a small, 5mm × 5mm, 32-pin thin QFN package, and is specified to operate over the automotive -40°C to +125°C temperature range.
MAX7030: Typical Application Circuit MAX7030: Typical Application Circuit Enlarge+

Key Features

  • +2.1V to +3.6V or +4.5V to +5.5V Single-Supply Operation
  • Single-Crystal Transceiver
  • Factory-Preset Frequency (No Serial Interface Required)
  • ASK/OOK Modulation
  • +10dBm Output Power into 50Ω Load
  • Integrated TX/RX Switch
  • Integrated Transmit and Receive PLL, VCO, and Loop Filter
  • > 45dB Image Rejection
  • Typical RF Sensitivity*: -114dBm
  • Selectable IF Bandwidth with External Filter
  • < 12.5mA Transmit-Mode Current
  • < 6.7mA Receive-Mode Current
  • < 800nA Shutdown Current
  • Fast-On Startup Feature, < 250µs
  • Small, 32-Pin, Thin QFN Package

Applications/Uses

  • 2-Way Remote Keyless Entry
  • Garage Door Openers
  • Home Automation
  • Local Telemetry Systems
  • Remote Controls
  • Remote Sensing
  • Security Systems
  • Smoke Alarms
Request Reliability Report for: MAX7030 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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