Overview
The SSM3302ACPZ-R7, produced by 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 supports single-supply operation 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 8 Ω) with less than 1% Total Harmonic Distortion plus Noise (THD + N) from a 12 V supply. The amplifier features a high-efficiency, low-noise modulation scheme that does not require external LC output filters, ensuring high efficiency even at low output power levels.
Key Specifications
| Parameter | Test Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Output Power/Channel | RL = 8 Ω, THD = 1%, f = 1 kHz, 20 kHz BW, PVDD = 15 V | - | - | 8 | W |
| Output Power/Channel | RL = 8 Ω, THD = 1%, f = 1 kHz, 20 kHz BW, PVDD = 12 V | - | - | 8 | W |
| Output Power/Channel | RL = 8 Ω, THD = 1%, f = 1 kHz, 20 kHz BW, PVDD = 7 V | - | - | 2.7 | W |
| Signal-to-Noise Ratio (SNR) | - | - | - | >98 | dB |
| Supply Voltage Range | - | 7 | - | 18 | V |
| Efficiency | PVDD = 12 V, RL = 8 Ω, PO = 10 W | - | - | 82% | % |
| Input Impedance | - | - | - | 40 | kΩ |
| Package Type | - | - | - | 40-lead LFCSP | - |
| Operating Temperature Range | - | -40 | - | 85 | °C |
Key Features
- High-efficiency Class-D audio amplifier with up to 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.
- Single-supply operation from 7 V to 18 V.
- Flexible gain adjustment from 9 dB to 24 dB.
- Fixed input impedance of 40 kΩ.
- Mono output mode for 1 × 20 W output power into a 2 Ω load.
- Low shutdown current of 10 µA.
- Short-circuit and thermal protection.
- User-selectable ultralow EMI emissions mode using spread spectrum pulse density modulation (PDM).
- Pop-and-click suppression and thermal warning indicator.
- Power-on reset and fully differential input for excellent common-mode noise rejection.
Applications
- Mobile computing devices.
- Flat panel televisions.
- Media docking stations.
- Portable electronics.
- Sound bars.
Q & A
- What is the output power of the SSM3302 in stereo mode?
The SSM3302 can deliver 2 × 10 W of continuous output power into a 4 Ω load (or 2 × 8 W into 8 Ω) with less than 1% THD + N from a 12 V supply.
- What is the supply voltage range for the SSM3302?
The SSM3302 operates from a single supply voltage range of 7 V to 18 V).
- What is the efficiency of the SSM3302 at different output powers?
The SSM3302 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 SSM3302 require external LC output filters?
No, the SSM3302 features a high-efficiency, low-noise modulation scheme that does not require external LC output filters).
- What is the input impedance of the SSM3302?
The input impedance of the SSM3302 is fixed at 40 kΩ).
- What protection features does the SSM3302 include?
The SSM3302 includes short-circuit and thermal protection, as well as a thermal warning indicator).
- Can the SSM3302 be used in mono mode?
Yes, the SSM3302 can be configured for mono output mode to drive a load as small as 2 Ω up to 20 W continuous output power).
- How does the SSM3302 manage EMI emissions?
The SSM3302 uses spread spectrum pulse density modulation (PDM) to reduce EMI radiated emissions, and it includes an optional ultralow EMI emission mode).
- What package type is the SSM3302 available in?
The SSM3302 is available in a 40-lead, 6 mm × 6 mm LFCSP package).
- Is the SSM3302 RoHS compliant?
Yes, the SSM3302 is RoHS compliant).
