MAX2140 is a satellite digital audio receiver in the MAX series
The MAX2140 is a complete receiver designed for Satellite Digital Audio Radio Services (SDARS). It integrates a VCO, RF AGC loop, and baseband‑controlled IF AGC loop, requiring only a low‑noise amplifier and a few external components to form a low‑cost, compact SDARS solution. Applications include SDARS and 2.4 GHz ISM radios.
Key features include a 2‑wire I²C‑compatible serial interface for programming, programmable gains, on‑chip low‑pass filters, and a 44‑pin thin QFN package. The document provides detailed pin‑out diagrams, absolute maximum ratings, DC and AC electrical characteristics, typical operating curves, timing specifications, and layout recommendations for power‑supply and matching networks.
The MAX2140 is programmed via a 2‑wire I²C‑compatible serial interface.
Use a star configuration with a large decoupling capacitor at a central VCC node and local bypass capacitors at each VCC pin.