The MAX2440/MAX2441/MAX2442 highly integrated front-end receiver ICs provide the lowest cost solution for cordless phones and ISM-band radios operating in the 900MHz band. All devices incorporate receive imagereject mixers to reduce filter cost. They operate with a +2.7V to +4.8V power supply, allowing direct connection to a 3-cell battery stack.
The signal path incorporates an adjustable-gain LNA and an image-reject downconverter with 35dB image suppression. These features yield excellent combined downconverter noise figure (4dB) and high linearity with an input third-order intercept point (IP3) of up to +2dBm.
All devices include an on-chip local oscillator (LO), requiring only an external varactor-tuned LC tank for operation. The integrated divide-by-64/65 dual-modulus prescaler can also be set to a direct mode, in which it acts as an LO buffer amplifier. Three separate powerdown inputs can be used for system power management, including a 0.5µA shutdown mode. These parts are compatible with commonly used modulation schemes such as FSK, BPSK, and QPSK, as well as frequency hopping and direct sequence spread-spectrum systems. All devices come in a 28-pin SSOP package.
Evaluation kits are available for the MAX2420/ MAX2421/MAX2422. The MAX2420/MAX2421/MAX2422 are transceivers whose receive sections and pinout are identical to the MAX2440/MAX2441/MAX2442.
For complete transceiver devices, refer to the MAX2420/ MAX2421/MAX2422/MAX2460/MAX2463 and MAX2424/ MAX2426 data sheets.
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·Cordless Phones ·Spread-Spectrum Communications·Wireless Telemetry ·Two-Way Paging·Wireless Networks
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· Receive Mixer with 35dB Image Rejection· Adjustable-Gain LNA· Up to +2dBm Combined Receiver Input IP3· 4dB Combined Receiver Noise Figure· Low Current Consumption: 23mA Receive 9.5mA Oscillator· 0.5µA Shutdown Mode· Operates from Single +2.7V to +4.8V Supply
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VCC to GND...........................................................-0.3V to +5.5V
Voltage on LNAGAIN, RXON, VCOON,
DIV1, MOD ................................................-0.3V to (VCC + 0.3V)
RXIN Input Power............................................................10dBm
TANK, TANK Input Power...................................................2dBm
Continuous Power Dissipation (TA = +70°C)
SSOP (derate 9.50mW/°C above +70°C) ...................762mW
Operating Temperature Range
MAX244_EAI...................................................-40°C to +85°C
Junction Temperature..................................................+150°C
Storage Temperature Range .......................-65°C to +165°C
Lead Temperature (soldering, 10sec) ..........................+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.
Post a Buying Lead
Required Field 
