MAX98396

PRODUCTION

20V Digital Input Class-DG Amplifier with I/V Sense and Brownout Prevention

20V Digital Input Class-DG Amp with IV Sense and Brownout Prevention

Data Sheet (Rev. 0)
Product Selection Table
Viewing:

Overview

  • Wide Input Supply Range (3.0V to 20V)
  • Class-DG Operation Enables Industry-Leading Quiescent Power
    •  12.7mW at VPVDD = 12V , VVBAT = 3.8V
    •  18mW at VPVDD = 19V, VVBAT = 5.0V
  • Ultra-Low Noise Floor
    • 15.5μVRMS Output Noise
    • 118dB Dynamic Range
  • Low Distortion
    • -82dB THD+N at 1W into 8Ω, f = 1kHz 
    • -76dB THD+N at 1W into 8Ω, f = 6kHz
  • Output Power at 1% THD+N:
    • 20W into 8Ω, VPVDD = 19V
    • 19W into 4Ω, VPVDD = 14V
  • 60W Peak Output Power into 4Ω, VPVDD = 19V 
  • Speaker Amplifier Efficiency:
    • 87% at 1W into 8Ω, VPVDD = 12V, VVBAT = 3.8V
    • 83% at 1W into 4Ω, VPVDD = 12V, VVBAT = 3.8V
    • 83% at 1W into 8Ω, VPVDD = 19V, VVBAT = 5.0V
    • 91% at 20W into 8Ω, VPVDD = 19V, VVBAT = 5.0V
  • Class-D EMI Reduction Enables Filterless Operation
  • Spread-Spectrum Modulation
  • Switching-Edge Rate Control
  • Integrated Speaker Current and Voltage Sense do not Require External Components
  • Flexible Brownout-Prevention Engine
  • I2S/16-Channel TDM and I2C Digital Interfaces
  • Playback Support for 16-, 24-, and 32-Bit Data Words
  • Playback and I/V Sense Support Sample Rates up to 192kHz
  • Audio Processing Bypass Path
  • Dynamic-Headroom Tracking Maintains a Consistent Listening Experience
  • Extensive Click-and-Pop Suppression
  • 35-Bump, WLP (0.4mm Pitch)

The MAX98396 is a high-efficiency, mono Class-DG speaker amplifier with industry-leading quiescent power featuring I/V sense, brownout-prevention engine (BPE), and dynamic-headroom tracking (DHT). The IC enables ultrasound applications by providing support for sample rates up to 192kHz, a higher passband (for fs > 50kHz), and a bypass path for the ultrasound signals through the amplifier so it is not attenuated by the audio processing. Precision output current and voltage monitoring (I/V sense) enables the host device to run speaker protection algorithms. Spread-spectrum modulation (SSM) and edge rate control minimize EMI and eliminate the need for the output filtering found in traditional Class-D devices.

To achieve industry-leading quiescent power, the Class-DG amplifier employs two supply rails VBAT (3V to 5.5V) and PVDD (3V to 20V) to supply the speaker amplifier. The Class-DG amplifier switches between the two supply rails depending on the input signal level and/or the supply headroom. The brownout-prevention engine in the device allows it to reduce its contribution to the overall system power consumption by either attenuating or limiting the amplifier output when the device supply drops below a set of programmable thresholds. Additionally, as the power supply voltage varies due to sudden transients and declining battery life, DHT automatically optimizes the headroom available to the Class-DG amplifier to maintain consistent distortion and listening levels.

The device provides a PCM interface for audio data and a standard I2C interface for control data communication. The PCM interface supports audio playback using I2S, left-justified, and TDM audio data formats. A unique clocking structure eliminates the need for an external master clock for PCM communication, which reduces pin count and simplifies board layout. Enabling thermal foldback automatically reduces the output power when the temperature exceeds a user specified threshold. This allows for uninterrupted music playback even at high ambient temperatures. Traditional thermal protection is also available in addition to robust overcurrent protection.

The device is available in a 0.4mm pitch, 35-bump wafer-level package (WLP). The device operates over the extended -40°C to +85°C temperature range.

Applications

  • Mobile Speakers
  • Smart Speakers
  • Smart IoT
  • Tablets
  • Notebook Computers
  • Soundbars
MAX98396
20V Digital Input Class-DG Amplifier with I/V Sense and Brownout Prevention
MAX98396 Block Diagram MAX98396 Simplified Block Diagram MAX98396 Pin Configuration
Add to myAnalog

Add product to the Products section of myAnalog (to receive notifications), to an existing project or to a new project.

Create New Project
Ask a Question

Documentation

Data Sheet 1

Learn More
Add to myAnalog

Add media to the Resources section of myAnalog, to an existing project or to a new project.

Create New Project

Software Resources

Device Drivers 1

Evaluation Kits

MAX98396EVSYS

Evaluation System for the MAX98396

Buy Now View Details

Features and Benefits

  • Complete Hardware System with Easy Setup; No Tools or Special Equipment Required
  • Easy to use Graphical User Interface (GUI) Evaluation Software (Windows® 7/10 Compatible)
    • Complete Access to all Hardware Registers

Product Details

The MAX98396 evaluation system (EV system) evaluates the MAX98396 Mono Class-D Audio Amplifier featuring Dynamic Headroom Tracking (DHT) and Clock-and-Data Monitoring. The EV system consists of the MAX98396 Development Board (DEV board), Audio Interface Board III (AUDINT3), a micro-USB cable, and the MAX98396 evaluation software.

It is recommended that the DEV board be evaluated with the AUDINT3 board as an EV system. The MAX98396 supports standard I2S, left-justified, and TDM digital audio interfaces, as well as I2C for control.

The AUDINT3 board provides the USB-to-PCM and USB-to- I2C interfaces in addition to the 1.8V AVDD supply and the 1.2V DVDD and DVDDIO supplies that are needed to evaluate the DEV board. The IC DEV board requires two additional supply inputs, 3V to 5.5V (VBAT) and 3V to 20V (PVDD). Figure 1 details the DEV board and the AUDINT3 board.

Applications

  • Notebook Computers
  • Portable Speaker
  • Smart IoT
  • Smart Speaker
  • Soundbars
  • Tablets
MAX98396EVSYS
Evaluation System for the MAX98396

Latest Discussions

2 Years Ago
How to access the I2S raw data in the DSP(e.g. adau1761) to get the control data?
View related discussion on EngineerZone®

Recently Viewed