Overview
The SSM3582A, produced by Analog Devices Inc., is a fully integrated, high-efficiency digital input stereo Class-D audio amplifier. This device operates from a single supply voltage ranging from 4.5 V to 16.5 V and requires only a few external components, significantly reducing the circuit bill of materials. It features a proprietary, spread spectrum Σ-Δ modulation scheme that enables direct connection to the speaker, ensuring state-of-the-art analog performance while lowering radiated emissions. The amplifier provides outstanding analog performance with a 106 dB signal-to-noise ratio and a low 0.004% total harmonic distortion + noise (THD + N).
Key Specifications
| Parameter | Test Conditions/Comments | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Supply Voltage Range | 4.5 | 16.5 | V | ||
| Output Power (Stereo Mode) | RL = 8 Ω, PVDD = 12 V | 15 | W | ||
| Output Power (Stereo Mode) | RL = 4 Ω, PVDD = 12 V | 15 | W | ||
| Total Harmonic Distortion + Noise (THD + N) | PO = 5 W into 8 Ω, f = 1 kHz, PVDD = 12 V | 0.004 | % | ||
| Signal-to-Noise Ratio (SNR) | P = 8.1 W, R = 8 Ω, A = 19 dB | 106.5 | dB | ||
| Efficiency (Stereo Mode) | RL = 8 Ω, PVDD = 12 V | 93.8 | % | ||
| Efficiency (Stereo Mode) | RL = 4 Ω, PVDD = 12 V | 90.6 | % | ||
| Operating Temperature Range | -40 | 85 | °C | ||
| Package Type | 40-lead LFCSP (6 mm × 6 mm w/ EP) |
Key Features
- Operates from a single 4.5 V to 16.5 V supply voltage.
- State-of-the-art, proprietary, filterless Σ-Δ modulation scheme.
- Supports multiple PCM audio serial data formats, including I2S, left justified, and time division multiplexing (TDM).
- Capable of delivering 2× 15 W rms continuously into 8 Ω and 4 Ω loads at <1% total harmonic distortion (THD).
- High power efficiency: 93.8% into an 8 Ω load and 90.6% into a 4 Ω load.
- Optional ultralow electromagnetic interference (EMI) mode to reduce radiated emissions above 100 MHz.
- Digital volume control with selectable smooth ramp and automatic gain control (AGC) function.
- Pop and click-free mute and unmute transitions.
- Built-in thermal shutdown, output short-circuit protection, and early thermal warning with programmable gain limiting.
- I2C control interface and hardware modes with up to 16 pin-selectable slots/addresses).
Applications
- Mobile computing devices).
- All-in-one computers).
- Portable electronics).
- Wireless speakers).
- Televisions).
Q & A
- What is the operating voltage range of the SSM3582A?
The SSM3582A operates from a single supply voltage ranging from 4.5 V to 16.5 V).
- What is the maximum output power of the SSM3582A in stereo mode?
The SSM3582A can deliver up to 2× 15 W rms continuously into 8 Ω and 4 Ω loads at <1% total harmonic distortion (THD)).
- What is the signal-to-noise ratio (SNR) of the SSM3582A?
The SSM3582A has a signal-to-noise ratio (SNR) of 106.5 dB at P = 8.1 W, R = 8 Ω, A = 19 dB).
- What is the efficiency of the SSM3582A in stereo mode?
The efficiency of the SSM3582A is 93.8% into an 8 Ω load and 90.6% into a 4 Ω load).
- Does the SSM3582A have built-in protection features?
Yes, the SSM3582A has built-in thermal shutdown, output short-circuit protection, and early thermal warning with programmable gain limiting).
- What is the package type of the SSM3582A?
The SSM3582A is available in a 40-lead, 6 mm × 6 mm lead frame chip scale package (LFCSP) with a thermal pad).
- Does the SSM3582A support multiple audio formats?
Yes, the SSM3582A supports multiple PCM audio serial data formats, including I2S, left justified, and time division multiplexing (TDM)).
- How does the SSM3582A manage electromagnetic interference (EMI)?
The SSM3582A has an optional ultralow EMI mode to reduce radiated emissions above 100 MHz).
- What control interface does the SSM3582A use?
The SSM3582A uses an I2C control interface and hardware modes with up to 16 pin-selectable slots/addresses).
- Does the SSM3582A have automatic power-down features?
Yes, the SSM3582A has an automatic power-down feature that shuts down the amplifier and the digital-to-analog converter (DAC) when no signal is present at the input, minimizing power consumption during digital silence).
