Product Descriptions

The MAX2140 complete receiver is designed for satellite digital audio radio services (SDARS). The device includes a fully monolithic VCO and only needs a SAW at the IF and a crystal to generate the reference frequency.

To form a complete SDARS radio, the MAX2140 requires only a low-noise amplifier (LNA), which can be controlled by a baseband controller. The small number of external components needed makes the MAX2140-based platform the lowest cost and the smallest solution for SDARS.

The receiver includes a self-contained RF AGC loop and baseband-controlled IF AGC loop, effectively providing a total dynamic range of over 92dB.

Channel selectivity is ensured by the SAW filter and by on-chip monolithic lowpass filters.

The fractional-N PLL allows a very small frequency step, making possible the implementation of an AFC loop. Additionally, the reference is provided by an external XTAL and on-chip oscillator. A reference buffer output is also provided.

Product Features

● Integrated Receiver, Requires Only One SAW Filter

● Self-Contained RF AGC Loop

● Differential I/Q Interface

● Complete Integrated Frequency Generation

● Bias Supply for External LNAs

● Overcurrent Protection

● Low-Power Standby Mode

● Very Small 44-Pin Thin QFN Package

Product Applications

● Satellite Digital Audio Radio Services (SDARS)

● 2.4GHz ISM Radios

Product Specification

Product Photos

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