Overview
The SSM3302ACPZ from Analog Devices Inc. is a fully integrated, high-efficiency, stereo Class-D audio amplifier. This device is designed to operate with minimal external components and can be powered from a single supply voltage ranging from 7 V to 18 V. It is capable of delivering 2 × 10 W of continuous output power into a 4 Ω load or 2 × 8 W into an 8 Ω load with less than 1% Total Harmonic Distortion plus Noise (THD + N) from a 12 V supply. The SSM3302 also features a high-efficiency, low-noise modulation scheme that eliminates the need for external LC output filters, ensuring high efficiency even at low output power levels.
Key Specifications
| Parameter | Value |
|---|---|
| Output Power | 2 × 10 W into 4 Ω, 2 × 8 W into 8 Ω |
| Supply Voltage Range | 7 V to 18 V |
| Efficiency | 90% at 7 W into 8 Ω, 82% at 10 W into 4 Ω from 12 V supply |
| THD + N | <1% from 12 V supply |
| Signal-to-Noise Ratio (SNR) | >98 dB |
| Temperature Range | −40°C to +85°C |
| Package Type | 40-lead, 6 mm × 6 mm lead frame chip scale package (LFCSP) |
| Shutdown Current | Typical 10 μA |
Key Features
- High-efficiency, low-noise modulation scheme without external LC output filters.
- Spread spectrum pulse density modulation (PDM) for lower EMI radiated emissions.
- Optional ultralow EMI emission mode to reduce radiated emissions above 100 MHz.
- Fully differential input with excellent common-mode noise rejection.
- Flexible gain select pin allowing gain adjustment between 9 dB and 24 dB with a single series resistor.
- Integrated voltage regulator generating a 5 V rail.
- Micropower shutdown mode with typical shutdown current of 10 μA.
- Pop-and-click suppression circuitry to minimize audible noise during turn-on and turn-off.
- Input low-pass filtering to suppress out-of-band DAC noise interference.
- Fixed input impedance to simplify component selection.
- Thermal warning indicator pin and built-in thermal shutdown and output short-circuit protection.
Applications
The SSM3302ACPZ is suitable for a variety of audio applications where high efficiency, low noise, and minimal external components are required. These include:
- Portable audio devices such as speakers, headphones, and music players.
- Automotive audio systems.
- Home audio equipment like soundbars and home theaters.
- Industrial audio systems requiring robust and efficient amplification.
Q & A
- What is the output power of the SSM3302ACPZ?
The SSM3302ACPZ can deliver 2 × 10 W of continuous output power into a 4 Ω load or 2 × 8 W into an 8 Ω load.
- What is the supply voltage range for the SSM3302ACPZ?
The device operates from a single supply voltage ranging from 7 V to 18 V.
- What is the efficiency of the SSM3302ACPZ?
The device operates with 90% efficiency at 7 W into an 8 Ω load and 82% efficiency at 10 W into a 4 Ω load from a 12 V supply.
- Does the SSM3302ACPZ require external LC output filters?
No, the SSM3302ACPZ features a high-efficiency, low-noise modulation scheme that eliminates the need for external LC output filters.
- How does the SSM3302ACPZ manage EMI emissions?
The device uses spread spectrum pulse density modulation (PDM) to reduce EMI radiated emissions and includes an optional ultralow EMI emission mode.
- What is the typical shutdown current of the SSM3302ACPZ?
The typical shutdown current is 10 μA.
- Does the SSM3302ACPZ have built-in protection features?
Yes, it includes built-in thermal shutdown and output short-circuit protection.
- What is the temperature range for the SSM3302ACPZ?
The device is specified over the commercial temperature range of −40°C to +85°C.
- What package type is the SSM3302ACPZ available in?
The device is available in a 40-lead, 6 mm × 6 mm lead frame chip scale package (LFCSP).
- Does the SSM3302ACPZ have pop-and-click suppression?
Yes, the device includes pop-and-click suppression circuitry to minimize audible noise during turn-on and turn-off.
