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MAX2420

Maxim
Part Number MAX2420
Manufacturer Maxim
Description 900MHz Image-Reject Transceivers
Published May 6, 2005
Detailed Description 19-1234; Rev 2; 2/99 UAL IT MAN TION K A ET U E L H A S EV TA WS DA FOLLO 900MHz Image-Reject Transceivers Features o ...
Datasheet PDF File MAX2420 PDF File

MAX2420
MAX2420

Overview
19-1234; Rev 2; 2/99 UAL IT MAN TION K A ET U E L H A S EV TA WS DA FOLLO 900MHz Image-Reject Transceivers Features o Receive/Transmit Mixers with 35dB Image Rejection o Adjustable-Gain LNA o Up to +2dBm Combined Receiver Input IP3 o 4dB Combined Receiver Noise Figure o >35dB of Transmit Power Control Range o PA Predriver Provides up to +2dBm o Low Current Consumption: 23mA Receive 26mA Transmit 9.
5mA Oscillator o 0.
5µA Shutdown Mode o Operates from Single +2.
7V to +4.
8V Supply General Description The MAX2420/MAX2421/MAX2422/MAX2460/MAX2463 are highly integrated front-end ICs that provide the lowest cost solution for cordless phones and ISM-band radios operating in the 900MHz band.
All devices incorporate transmit and receive image-reject 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 receive 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.
The transmitter consists of a variable-gain IF amplifier with more than 35dB control range, an image-reject upconverter with 35dB image rejection, and a poweramplifier (PA) predriver that produces up to +2dBm (in some applications serving as the final power stage).
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.
Four 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.
For applic...


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