ADI SSM3582BCPZRL

The SSM3582 is a fully integrated, high efficiency, digital input stereo Class-D audio amplifier. It can operate from a single supply, and requires only a few external components, significantly reducing the circuit bill of materials. A proprietary, spread spectrum Σ-Δ modulation scheme enables direct connection to the speaker, and ensures state-of-the-art analog performance while lowering radiated emissions compared to other Class-D architectures. An optional ultralow electromagnetic interference (EMI) mode significantly reduces radiated emissions above 100 MHz, enabling longer speaker cable lengths. Audio is transmitted digitally to the amplifier, minimizing the possibility of signal corruption in digital environments. The amplifier provides outstanding analog performance, with an over 106 dB signal-to-noise ratio and a vanishingly low 0.004% THD+N. The SSM3582 operates from a single 4.5 V to 16 V supply, and is capable of delivering 2×15 W rms continuously into 8 Ω and 4 Ω loads at <1% total harmonic distortion (THD). The efficient modulation scheme maintains excellent power efficiency over a wide range of impedances: 93% into an 8 Ω load and 90% into a 4 Ω load. Optimization of the output pulse maintains performance at impedances as low as 3 Ω/5 μH, enabling its use with extended bandwidth tweeters. The pulse code modulation (PCM) audio serial port supports most common protocols, such as I²S, left justified, and time division multiplexing (TDM), and can address up to 16 devices on a single interface, for up to 32 audio playback channels.

• Digital input stereo, high efficiency Class-D amplifier
• Operates from a single 4.5 V to 16 V supply
• State-of-the-art, proprietary, filterless Σ-Δ modulation
• 106.5 dB signal-to-noise ratio
• 0.004% total harmonic distortion plus noise (THD+N) at 5 W into 8 Ω
• 38.5 μν rms A weighted output noise
• Pop/clickless on/off sequence
• 2×14.67 W output at 12 V supply to 4 Ω loads at <1% THD+N
• 2×14.4 W output at 16 V supply to 8 Ω loads at <1% THD+N
• Mono mode for increased maximum output power
• 1×49.69 W output at 16 V supply to 2 Ω loads at <1% THD+N
• Support for low impedance loads: As low as 3 Ω/5 μH in stereo mode; As low as 2 Ω/5 μH in mono mode
• High power efficiency: 93.8% efficiency into an 8 Ω load; 90.6% efficiency into a 4 Ω load; 12.34 mA quiescent current with single 12 V PVDD supply
• Single supply operation with internal LDOs or option to use an external 5 V and 7.8 V supply for lowest power consumption
• I²C control and hardware modes with up to 16 pin-selectable slots/addresses
• Supported sample rates from 8 kHz to 192 kHz; 24-bit resolution
• Multiple PCM audio serial data formats: TDM slave with support for up to 16 devices on a single bus; I²S or left justified slave
• Adjustable full-scale output tailored for many PVDD sources
• 2- and 3-cell Li-Ion batteries
• Digital volume control with selectable smooth ramp
• Automatic power-down function
• Supply monitoring automatic gain control (AGC) function reduces system brownout
• Standalone operational mode without I²C
• Temperature sensor with τ°C step readout via I²C
• Short-circuit, undervoltage, and thermal protection
• Thermal early warning
• Power-on reset
• PVD D sensing ADC
• 40-lead, 6 mm×6 mm LFCSP with thermal pad

• Mobile computing
• All in one computers
• Portable electronics
• Wireless speakers
• Televisions