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Low-power, High-Performance Audio CODEC

World Class Audio Performance for a Fraction of the Power

Product Details

Key Features

Applications/Uses

Parametric specs for Audio Data Converters
Functions Audio CODEC
VSUPPLY (V) (min) 1.1 (Analog/Digital)
1.1 (Interface)
1.3 (Mic Bias)
1.71 (Analog)
VSUPPLY (V) (max) 1.3 (Analog/Digital)
1.95 (Analog)
1.95 (Interface)
4.8 (Mic Bias)
IQ (mA) 1.94 (DAC Playback)
3.6 (Stereo ADC Record)
7.2 (AMIC Hybrid ANC Profile)
# ADCs 3
# DACs 1
SNR (dB) (ADC) 107
113
Bit Depth (ADC) 16
24
32
Sample Rate (kHz) (ADC) 8 to 48 (Record)
96/192/384 (Filters)
SNR (dB) (DAC) 114
Bit Depth (DAC) 16
24
32
Sample Rate (kHz) (DAC) 8 to 192
Pitch (mm) 0.4
Interface Audio - I2S
Audio - PCM/TDM
Serial - I2C
Package/Pins THIN WLP/36
Budgetary
Price (See Notes)
3.16
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Simplified Block Diagram

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Parameters

Parametric specs for Audio Data Converters
Functions Audio CODEC
VSUPPLY (V) (min) 1.1 (Analog/Digital)
1.1 (Interface)
1.3 (Mic Bias)
1.71 (Analog)
VSUPPLY (V) (max) 1.3 (Analog/Digital)
1.95 (Analog)
1.95 (Interface)
4.8 (Mic Bias)
IQ (mA) 1.94 (DAC Playback)
3.6 (Stereo ADC Record)
7.2 (AMIC Hybrid ANC Profile)
# ADCs 3
# DACs 1
SNR (dB) (ADC) 107
113
Bit Depth (ADC) 16
24
32
Sample Rate (kHz) (ADC) 8 to 48 (Record)
96/192/384 (Filters)
SNR (dB) (DAC) 114
Bit Depth (DAC) 16
24
32
Sample Rate (kHz) (DAC) 8 to 192
Pitch (mm) 0.4
Interface Audio - I2S
Audio - PCM/TDM
Serial - I2C
Package/Pins THIN WLP/36
Budgetary
Price (See Notes)
3.16

Key Features

  • Low-Latency Digital Filter Channels
    • 96kHz/192kHz/384kHz Sample Rate Options
    • Channel Support Applications Including Feed-Forward (FF) and Feedback (FB) ANC, Ambient/Voice Enhancement and Transparency, and Playback Compensation
    • Filters Allowing Smooth, Dynamic Transitions / Updates without Playback Disruption
  • Mono Headphone Playback Channel
    • High-Efficiency Hybrid Class-AB/D Amplifier
    • 114dB Playback Dynamic Range
    • 2.55mW PQ (fS = 48kHz, No Noise Gate)
    • 1.9mW PQ (fS = 48kHz, With Noise Gate)
  • Three Microphone Record Channels 
    • Analog or Digital Microphone Inputs
    • 107dB Dynamic Range (AMIC Single-Ended)
    • 113dB Dynamic Range (AMIC Differential))
    • 5.3mW PQ (fS = 16kHz, 2 AMIC Record)
    • 2.1mW PQ (fS = 16kHz, 2 DMIC Record)
  • Playback with ANC Filter Profile (fS = 192kHz)
    • 9.85mW PQ (AMIC FF+FB Profile)
    • 6.7mW PQ (AMIC FF Only Profile)
    • 7mW PQ (DMIC FF+FB Profile)
  • Full-Scale Playback Power at 1% THD+N:
    • 31mW into 32Ω (1VRMS Full-Scale Mode)
    • 15mW into 32Ω (Reduced Swing Mode)
    • 61mW into 16Ω (1VRMS Full-Scale Mode)
  • Flexible I2S/TDM Digital Audio Interface
    • Support for 16/24/32-Bit Audio Data
    • Playback Sample Rates of 8kHz to 192kHz 
    • No High-Speed Master Clock Required 
  • Audio CODEC Evaluation Platform Available
    • Includes Maxim Reference Headset Design 
  • 6.7mm2 36-Bump WLP Package
    • 0.4mm Pitch with a 0.5mm Height

Applications/Uses

  • True Wireless Hearables and Headsets
  • Stereo Bluetooth Headsets and Headphones
  • Mono Bluetooth Earpieces
  • PSAP Devices and Hearing Assist Devices
  • VR/AR Headsets and Head-Mounted Devices

Description

The MAX98050 is a low-power, high-performance audio CODEC with integrated low-latency digital filters for wireless hearables, headsets, and headphones.

The device features a mono playback channel with a 5-band biquad equalizer and a high-efficiency, fully differential hybrid class-AB/class-D headphone amplifier. The playback headphone amplifier is optimized for extremely low output noise levels and minimized quiescent power consumption while maximizing output power efficiency.

The device includes three microphone input channels capable of supporting voice, ambient, and anti-noise record use cases. Each channel can individually record from either an external analog or digital microphone, and then can route audio data to both the record channels (to the digital audio interface) and the internal low-latency digital filter channels. A fourth record channel to the digital audio interface is provided to allow the host to monitor the playback channel output digital data.

Two low-latency, digital filter channels are provided that can support a variety of use cases. These include noise cancellation applications (feed-forward, feedback, and hybrid filter profiles), both voice and ambient enhancement and transparency applications, and sidetone applications. Each channel provides a 12-band digital biquad filter, a DRC or Limiter stage, a digital volume control block, and an ultrasound filter. In addition, a third internal digital filter channel is provided in the playback channel that is structured for playback compensation and/or general feedback compensation filters. This channel includes a 10-band biquad filter and a digital volume control block. To support dynamic or adaptive filter and use case transitions, the biquad filters and volume controls provide banked profiles that can be updated/swapped without disruption to audio playback.

The flexible digital audio interface supports common PCM audio data formats such as I2S, left-justified, and TDM timing with 16-bit, 24-bit, or 32-bit data word and channel lengths. The PCM interface supports playback sample rates from 8kHz to 192kHz and record sample rates from 8kHz to 48kHz. The device requires external bit and frame clocks but eliminates the need for a high-speed external master clock.

The device is available in a small 6.7mm2 36-bump WLP package (0.4mm pitch) with a low 0.5mm height ideal for tight form factors. The device operates over the extended -40°C to +85°C temperature range.

Simplified Block Diagram

MAX98050: Simplified Block Diagram MAX98050: Simplified Block Diagram Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .