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 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 ensures state-of-the-art analog performance and reduces radiated emissions compared to other Class-D architectures. The amplifier is designed to provide 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 | Symbol | Test Conditions/Comments | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Supply Voltage | PVDD | 4.5 | 16.5 | V | ||
| Output Power (into 8 Ω) | PO | PVDD = 12 V, THD < 1% | 2 × 15 W | W | ||
| Output Power (into 4 Ω) | PO | PVDD = 12 V, THD < 1% | 2 × 15 W | W | ||
| Total Harmonic Distortion + Noise | THD + N | PO = 5 W into 8 Ω, f = 1 kHz, PVDD = 12 V | 0.004% | % | ||
| Output Stage On Resistance | RON | 100 | mΩ | |||
| Average Switching Frequency | fSW | 300 | kHz | |||
| Operating Temperature Range | TA | -40 | 85 | °C | ||
| Package Type | 40-lead LFCSP (6 mm × 6 mm with thermal pad) |
Key Features
- Proprietary, spread spectrum Σ-Δ modulation scheme for state-of-the-art analog performance and reduced radiated emissions.
- Optional ultralow electromagnetic interference (EMI) mode to reduce radiated emissions above 100 MHz.
- Digital input via I2S, left justified, and time division multiplexing (TDM) interfaces, supporting up to 16 devices on a single bus.
- I2C control interface with hardware modes and up to 16 pin-selectable addresses.
- Automatic power-down feature and micropower shutdown mode to minimize power consumption during digital silence.
- Pop and click-free mute and unmute transitions.
- Built-in thermal shutdown, output short-circuit protection, and early thermal warning with programmable gain limiting.
- Support for 2- and 3-cell Li-Ion batteries and adjustable full-scale output tailored for many PVDD sources.
- Digital volume control with selectable smooth ramp and supply monitoring automatic gain control (AGC) function.
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 ranging from 4.5 V to 16.5 V.
- What is the maximum output power of the SSM3582A into an 8 Ω load?
The SSM3582A can deliver up to 2 × 15 W rms continuously into an 8 Ω load at <1% THD.
- What is the total harmonic distortion + noise (THD + N) of the SSM3582A?
The THD + N is 0.004% at 5 W into 8 Ω, f = 1 kHz, PVDD = 12 V.
- Does the SSM3582A have built-in protection features?
Yes, it has built-in thermal shutdown, output short-circuit protection, and early thermal warning with programmable gain limiting.
- What interfaces does the SSM3582A support for digital input?
The SSM3582A supports I2S, left justified, and time division multiplexing (TDM) interfaces.
- How does the SSM3582A manage power consumption during digital silence?
The device has an automatic power-down feature and a micropower shutdown mode to minimize power consumption during digital silence.
- 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.
- What is the operating temperature range of the SSM3582A?
The operating temperature range is from -40°C to +85°C.
- Does the SSM3582A support multiple devices on a single bus?
Yes, it can address up to 16 devices on a single I2S or TDM interface.
- What is the average switching frequency of the SSM3582A?
The average switching frequency is 300 kHz.
