MAX7042中文资料
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General DescriptionThe MAX7042 fully integrated, low-power, CMOSsuperheterodyne RF receiver is designed to receive frequency-shift-keyed (FSK) data at rates up to 66kbpsnonreturn-to-zero (NRZ) (33kbps Manchester). TheMAX7042 requires only a few external components torealize a complete wireless RF receiver at 308, 315,418, and 433.92MHz.The MAX7042 includes all the active componentsrequired in a superheterodyne receiver including a low-noise amplifier (LNA), an image-rejection (IR) mixer, afully integrated phase-locked loop (PLL), local oscillator(LO), 10.7MHz IF limiting amplifier with received-signal-strength indicator (RSSI), low-noise FM demodulator,and a 3V regulator. Differential peak-detecting datademodulators are included for baseband data recovery.The MAX7042 is available in a 32-pin thin QFN andis specified over the automotive -40°C to +125°Ctemperature range.ApplicationsRemote Keyless EntryTire-Pressure MonitoringHome and Office Lighting ControlRemote SensingSmoke AlarmsHome AutomationLocal Telemetry SystemsSecurity SystemsFeatures♦+2.4V to +3.6V or +4.5V to +5.5V Single-SupplyOperation♦Four User-Selectable Carrier Frequencies 308, 315, 418, and 433.92MHz♦-110dBm RF Input Sensitivity at 315MHz♦-109dBm RFInput Sensitivity at 433.92MHz♦Fast Startup (<250µs)♦Small 32-Pin Thin QFN Package♦Low Operating Supply Current6.2mA Continuous20nA Power-Down
♦Integrated PLL, VCO, and Loop Filter♦45dB Integrated Image Rejection♦Selectable IF BW with External Filter♦Positive and Negative Peak Detectors♦RSSI Output
MAX7042308MHz/315MHz/418MHz/433.92MHz Low-Power, FSK Superheterodyne Receiver
________________________________________________________________Maxim Integrated Products12423222120191812345671011121314151631302928272625MAX7042THIN QFNTOP VIEWENN.C.FSEL1FSEL2HVINDATALNASEL32N.C.N.C.N.C.N.C.RSSIXTAL2XTAL1AVDDLNAINDVDDDGNDDFOP+DS+DS-PDMAX17PDMINIFIN+IFIN-AGNDMIXOUTMIXIN-MIXIN+LNAOUT9LNASRC
8
Pin ConfigurationOrdering Information19-3704; Rev 0; 5/05For pricing, delivery, and ordering information,please contact Maxim/Dallas Direct!at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
*EP = Exposed pad. PART TEMPRANGE PIN-PACKAGE PKG CODE MAX7042ATJ -40°C to+125°C 32 Thin QFN-EP* 13255-3
Typical Application Circuit appears at end of data sheet.
元器件交易网www.cecb2b.comMAX7042308MHz/315MHz/418MHz/433.92MHz Low-Power, FSK Superheterodyne Receiver
2_______________________________________________________________________________________ABSOLUTE MAXIMUM RATINGS
DC ELECTRICAL CHARACTERISTICS(Typical Application Circuit, 50Ωsystem impedance, AVDD= DVDD= HVIN= +2.4V to +3.6V, fRF= 308, 315, 418, and 433.92MHz;TA= -40°C to +125°C, unless otherwise noted. Typical values are at AVDD= DVDD= HVIN= +3.0V, fRF= 433.92MHz,
PRFIN≤-80dBm, TA= +25°C, unless otherwise noted.)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functionaloperation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure toabsolute maximum rating conditions for extended periods may affect device reliability.
HVINto AGND or DGND.......................................-0.3V to +6.0VAVDD, DVDDto AGND or DGND..........................-0.3V to +4.0VFSEL1, FSEL2, LNASEL, EN, DATA...............................(DGND - 0.3V) to (HVIN+ 0.3V)All Other Pins............................(AGND - 0.3V) to (AVDD+ 0.3V)Continuous Power Dissipation (TA= +70°C)32-Pin Thin QFN (derate 34.5mW/°C above +70°C)....2759mW
Operating Temperature Range.........................-40°C to +125°CStorage Temperature Range.............................-65°C to +150°CMaximum RF Input Power................................................+0dBmLead Temperature (soldering, 10s).................................+300°C
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITSSupply Voltage (3V)VDD
HVIN, AVDD, and DVDD connected
to power supply2.43.03.6V
Supply Voltage (5V)HVINHVIN connected to power supply,AVDD and DVDD unconnected fromHVIN, but connected together4.55.05.5VOperating, 1x ILNA6.2315M H z ( 3V ) Operating, 2x ILNA6.8
Operating, 1x ILNA6.4315M H z ( 5V ) Operating, 2x ILNA7.0
Operating, 1x ILNA6.48.7434M H z ( 3V ) Operating, 2x ILNA7.08.6
Operating, 1x ILNA6.68.4
Supply CurrentIDD434M H z ( 5V ) Operating, 2x ILNA7.29.2mA
TA = +25°C0.02TA = +85°C0.1Shutdown Current (3V)ISHDNAll digitalinputs lowTA = +125°C0.856µA