SSM2302

www.DataSheet4U.com Filterless High Efficiency Class-D Stereo Audio Amplifier SSM2302 FEATURES Filterless Class-D amplifier with built-in output stage 1.4 W into 8 Ω at 5.0 V supply with less than 1% THD 85% efficiency at 5.0 V, 1.4 W into 8 Ω speaker Better than 98 dB SNR (signal-to-noise ratio) Single-supply operation from 2.5 V to 5.0 V 20 nA ultralow shutdown current Short-circuit and thermal protection Available in 16-lead, 3 mm × 3 mm LFCSP Pop-and-click suppression Built-in resistors reduce board component count Fixed and user-adjustable gain configurations 5.0 V supply and has a signal-to-noise ratio (SNR) that is better than 98 dB. PDM modulation is used to provide lower EMIradiated emissions compared with other Class-D architectures. The SSM2302 has a micropower shutdown mode with a typical shutdown current of 20 nA. Shutdown is enabled by applying a logic low to the SD pin. The architecture of the device allows it to achieve a very low level of pop and click. This minimizes voltage glitches at the output during turn-on and turn-off, thus reducing audible noise on activation and deactivation. The fully differential input of the SSM2302 provides excellent rejection of common-mode noise on the input. Input coupling capacitors can be omitted if the dc input common-mode voltage is approximately VDD/2. The SSM2302 also has excellent rejection of power supply noise, including noise caused by GSM transmission bursts and RF rectification. PSRR is typically 63 dB at 217 Hz...