SSM2306 Datasheet | Analog Devices

2 W, Filterless, Class-D Stereo Audio Amplifier SSM2306 Features Filterless Class-D amplifier with built-in output stage 2 W into 4 Ω and 1.4 W into 8 Ω at 5.0 V supply Ultralow idle current with load resistance >87% efficiency at 5.0 V, 1.4 W into 8 Ω speaker Better than 96 d B SNR (signal-to-noise ratio) Available in 16-lead, 3 mm × 3 mm LFCSP Single-supply operation from 2.5 V to 5.0 V 20 n A ultralow shutdown current Short-circuit and thermal protection Pop-and-click suppression Built-in resistors reduce board ponent count Default fixed 18 d B gain and user-adjustable The SSM2306 Features ultralow idle current, high efficiency, and a low noise modulation scheme. It operates with >87% efficiency at 1.4 W into 8 Ω from a 5.0 V supply and has a signal-to-noise ratio (SNR) that is better than 96 d B. PDM modulation offers lower EMI radiated emissions pared to other Class-D architectures. The SSM2306 has a micropower shutdown mode with a typical shutdown current of 20 n A. 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 to minimize voltage glitches at the output during turn-on and turn-off, thereby reducing audible noise on activation and deactivation. The fully differential input of the SSM2306 provides excellent rejection of mon-mode noise on the input. Input coupling capacitors can be omitted if the dc input mon-mode voltage is approximately VDD/2. The SSM2306 also has excellent rejection of power supply noise, including noise caused by GSM transmission bursts and RF rectification. The SSM2306 has a preset gain of 18 d B that can be reduced by using external resistors. The SSM2306 is specified over the mercial temperature range (- 40°C to +85°C). It has built-in thermal shutdown and output short-circuit protection. It is available in a 16-lead, 3 mm × 3 mm lead frame chip scale package (LFCSP). APPLICATIONS Mobile phones MP3 players Portable gaming Portable...