Rochester Electronics Linear - Amplifiers - Audio MAX9702BETI+

The MAX9702BETI+ is a Class D audio power amplifier designed for efficient audio amplification in various applications. It combines a Class D speaker amplifier with a Class AB headphone amplifier, delivering up to 1.1W per channel into an 8Oc load and 1.8W into a 4Oc load from a 5V power supply. The device features a filterless design, which simplifies the circuit and reduces component count. This amplifier supports two modulation schemes: fixed-frequency mode and spread-spectrum mode, the latter of which minimizes electromagnetic interference (EMI). It has a fully differential architecture and a full-bridged output, ensuring high performance with a power supply rejection ratio (PSRR) of 75dB and a total harmonic distortion plus noise (THD+N) of 0.07%. The headphone amplifier utilizes Maxim's DirectDrive architecture, allowing for a ground-referenced output without the need for large DC-blocking capacitors, thus saving space and cost. The MAX9702BETI+ includes an I2C interface for programmable gain settings, mono/stereo selection, and mute functions. It operates over an extended temperature range of -40¬8C to +85¬8C and is housed in a compact 28-pin thin QFN-EP package. The device also incorporates short-circuit and thermal-overload protection, enhancing reliability in various operating conditions.