MAX98366
15V Plug-and-Play Class-D Amplifier with Ultrasound Support
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Features
- Simple Plug-and-Play Design—No I2C Register Programming Required
- Wide Amplifier Supply Range (3V to 15V)
- Wideband Filters for fS = 88.2kHz and Higher
- 15W Output Power into 8Ω at PVDD = 15V
- 19.3W Output Power into 6Ω at PVDD = 15V
- 30mW Quiescent Power
- 1.1ms Turn-On Time (for MAX98366A and MAX98366B)
- 92.7% Efficiency (7.0W into RL = 8Ω, PVDD = 12V)
- 20μVRMS Idle Output Noise (fS ≤ 48kHz), 37μVRMS Idle Output Noise (fS > 50kHz)
- 112dB Dynamic Range (fS ≤ 48kHz), 107dB Dynamic Range (fS > 50kHz)
- -85dB THD+N at 1kHz
- No MCLK Required
- Sample Rates of 8kHz to 192kHz
- Supports Left, Right, or (Left/2 + Right/2) Output in I2S and Left-Justified Modes
- Sophisticated Edge Rate Control Enables Filterless Class-D Outputs
- Low 0.5μA Shutdown Current
- Class-D Switching Frequency Trimmed to 6% for Better EMI Planning
- Extensive Click-and-Pop Reduction Circuitry
- Robust Short-Circuit and Thermal Protection
- Available in Space-Saving Package: 12-Bump, WLP (1.21mm x 1.78mm, 0.4mm Pitch)
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The MAX98366 is an easy-to-use, low-cost, digital input Class-D amplifier that provides industry-leading, Class-AB audio performance with Class-D efficiency. The digital audio interface automatically recognizes different PCM and TDM clocking schemes, eliminating the need for I2C programming: Simply supply power, LRCLK, BCLK, and digital audio to generate sound. Furthermore, a novel pinout allows customers to use the cost-effective wafer-level package (WLP) without needing expensive in-pad vias. A wide 3V to 15V supply range allows the device to deliver 15W into an 8Ω load.
The digital audio interface is highly flexible. The devices support I2S, left-justified, and 8-channel time division multiplexed (TDM) data formats. The digital audio interface accepts 8kHz, 16kHz, 32kHz, 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, and 192kHz sample rates. The device supports ultrasound use cases and automatically provides a 38.8kHz and higher passband for digital audio input signals at sample rates higher than 48kHz (nominal). Data words can be 16-, 24-, or 32-bit in I2S and left-justified modes and 16- or 32-bit in TDM mode.
Digital audio interface input thresholds are ideal for interfacing to 1.2V and 1.8V logic. The devices can tolerate logic input voltages up to 5.5V.
The MAX98366A and MAX98366B have fast 1ms turn-on times while the MAX98366C and MAX98366D ramp the volume over 13ms during turn-on and turn-off.
The devices eliminate the need for the external MCLK signal typically used for PCM communication. This reduces EMI and possible board coupling issues in addition to reducing the size and pin count. The devices also feature a very high wideband jitter tolerance (12ns, typ) on BCLK and LRCLK to provide robust operation.
Active emissions-limiting, edge-rate limiting, and overshoot control circuitry greatly reduce EMI. A filterless spread-spectrum modulation scheme eliminates the need for output filtering found in traditional Class-D devices and reduces the component count of the solution.
The devices are specified over the -40°C to +85°C temperature range.
Applications
- Smart Speakers
- Wireless Speakers
- Smart IoT and Smart Home Devices
- Gaming Devices (Audio and Haptics)
- Laptops and Tablets
- Cameras
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MAX98366
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Documentation
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
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Material Declaration
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W121Q1Z+1
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Material Declaration
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- CAD Symbols, Footprints, and 3D Models
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W121Q1Z+1
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Material Declaration
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Reliablity Data
- CAD Symbols, Footprints, and 3D Models
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Software & Part Ecosystem
Evaluation Kits 1
MAX98366EVSYS
Evaluation System for the MAX98366
Features and Benefits
- Simple Plug-and-Play Design—No I2C Register Programming Required
- Wide Amplifier Supply Range (3V to 15V)
- Wideband Filters for Sample Rates ≥ 50kHz, Enabling Ultrasound Applications
- Sample Rates of 8kHz to 192kHz
- I2S, Left-Justified, or TDM Input
- Five Selectable Gains (9.5dB, 12.5dB, 15.5dB, 18.5dB, and 21.5dB)
- Audio Channel Select (Left, Right, and Mono Mix)
- Filter Less Operation
- Low EMI
- Complete Hardware System with Easy Setup; No Tools or Special Software Required
Product Detail
The MAX98366 evaluation system (EV system) is a fully assembled and tested system that evaluates the MAX98366A/B/C/D mono Class-D audio amplifier with ultrasound support. The EV system consists of a MAX98366 Development Board (DEV board), an Audio Interface Board III (AUDINT3), and a USB cable.
It is recommended that the DEV board be evaluated with the AUDINT3 board, as an EV system. MAX98366A and MAX98366C support the standard I2S interface, and MAX98366B and MAX98366D support standard left-justified mode. All MAX98366 variants support an 8-channel TDM digital audio interface.
The AUDINT3 board provides a USB-to-PCM interface and a 1.8V VDD supply needed to evaluate the DEV board. The MAX98366 DEV board requires one additional supply input, 3V to 15V (PVDD) when evaluating using the AUDINT3 board. Figure 1 details the DEV board and the AUDINT3 board.
Resources
Evaluation Kits1
Tools & Simulations 1
IBIS Model 1
IBIS Model