EVAL-SSM2375Z

EVAL-SSM2375Z is an evaluation board for SSM2375 filterless class-D audio amplifier. The application circuit requires a minimum of external components. It is capable of delivering 3W of continuous output power with less than 1% THD + N driving a 3Ω load from a 5.0V supply. Spread spectrum PDM is used to provide lower EMI-radiated emissions compared with other Class-D architectures. The inherent randomized nature of spread spectrum PDM eliminates clock intermodulation of several amplifiers in close proximity. The SSM2375 includes an optional modulation select pin that enables a low EMI mode, which significantly reduces the radiated emissions at the Class-D outputs, particularly above 100MHz. With this option selected, the SSM2375 can pass FCC Class B radiated emissions testing with a 50cm unshielded speaker cable without any external filtering. The device also includes a flexible gain select pin that only requires one series resistor to select among 0dB, 3dB, 6dB, 9dB, 12dB.

• Operates from a single 2.5V to 5.5V supply
• Designed to maximize performance for mobile phone applications