Features: The MAX2424/MAX2426 highly integrated front-end ICs provide the lowest cost solution for cordless and ISM- band radios operating in the 900MHz band. Both devices incorporate a receive image-reject mixer (to reduce filter cost) as well as a versatile transmit mixer. The devices operate from a +2.7V to +4.8V single 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 (IIP3) of up to +2dBm.
The transmitter consists of a double-balanced mixer and a power amplifier (PA) predriver that produces up to 0dBm (in some applications serving as the final power stage). It can be used in a variety of configurations, including BPSK modulation, direct VCO modulation, and transmitter upconversion. For devices featuring transmit as well as receive image rejection, refer to the MAX2420/MAX2421/MAX2422/MAX2460/MAX2463 data sheet.
The MAX2424/MAX2426 have 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 power down inputs can be used for system power management, including a 0.5PAA shutdown mode
The MAX2424/MAX2426 come in a 28-pin SSOP package.
ApplicationCordless Phones
Wireless Telemetry
Wireless Networks
Spread-Spectrum Communications
Two-Way PagingPinout
SpecificationsVCC to GND...........................................-0.3V to +5.5V
TXIN, TXIN Differential Voltage..............................+2V
Voltage on TXOUT........................-0.3V to(VCC+ 1.0V)
Voltage on LNAGAIN, TXON, RXON, VCOON,
DIV1, MOD, TXIN, TXIN.................-0.3V to(VCC+ 1.0V)
RXIN Input Power.............................................10dBm
TANK, TANK Input Power....................................2dBm
Continuous Power Dissipation (TA= +70)
SSOP (derate 9.50mW/ above +70).......762mW
Operating Temperature Range.............-40to +85
Junction Temperature.....................................+150
Storage Temperature Range...............65to +165
Lead Temperature (soldering, 10sec).............+300
MAX2424 Data Sheet
