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 50 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, <250s
` Small, 32-Pin, Thin QFN PackageApplication·2-Way Remote Keyless Entry
·Security Systems
·Home Automation
·Remote Controls
·Remote Sensing
·Smoke Alarms
·Garage Door Openers
·Local Telemetry SystemsPinout
SpecificationsHVIN to GND...................................................-0.3V to +6.0V
PAVDD, AVDD, DVDD to GND ...........................-0.3V to +4.0V
ENABLE, T/R, DATA, AGC0, AGC1,
AGC2 to GND ......................................-0.3V to (HVIN + 0.3V)
All Other Pins to GND .........................-0.3V to (_VDD + 0.3V)
Continuous Power Dissipation (TA = +70°C)
32-Pin Thin QFN (derate 21.3mW/°C
above +70°C).......................................................1702mW
Operating Temperature Range ..............-40°C to +125°C
Storage Temperature Range ..................-65°C to +150°C
Lead Temperature (soldering, 10s) ........................+300°C
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
DescriptionThe MAX7030 crystal-based, fractional-N transceiver is designed to transmit and receive ASK/OOK data at factory- preset carrier frequencies of 315MHz, 345MHz†, or 433.92MHz with data rates up to 33kbps (Manchester encoded) or 66kbps (NRZ encoded). This MAX7030 generates a typical output power of +10dBm into a 50 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 frequencygeneration components of MAX7030 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 x 5mm, 32-pin thin QFN package, and is specified to operate over the automotive -40°C to +125°C temperature range.
MAX7030 Data Sheet
