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MAX98050
Low-Power, High-Performance Audio Codec
General Description
Applications
The MAX98050 is a low-power, high-performance audio
CODEC with integrated low-latency digital filters for wire-
less hearables, headsets, and headphones.
● 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
The device features a mono playback channel with a
5-band biquad equalizer and a high-efficiency, fully differ-
ential 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.
Benefits and 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
The device includes three microphone input channels ca-
pable of supporting voice, ambient, and anti-noise record
use cases. Each channel can individually record from ei-
ther 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 play-
back channel output digital data.
• 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 P (f = 48kHz, No Noise Gate)
Q
S
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 hy-
brid 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 struc-
tured for playback compensation and/or general feedback
compensation filters. This channel includes a 10-band bi-
quad filter and a digital volume control block. To support
dynamic or adaptive filter and use case transitions, the bi-
quad filters and volume controls provide banked profiles
that can be updated/swapped without disruption to audio
playback.
• 1.9mW P (f = 48kHz, With Noise Gate)
Q
S
● Three Microphone Record Channels
• Analog or Digital Microphone Inputs
• 107dB Dynamic Range (AMIC Single-Ended)
• 113dB Dynamic Range (AMIC Differential))
• 5.3mW P (f = 16kHz, 2 AMIC Record)
Q
S
• 2.1mW P (f = 16kHz, 2 DMIC Record)
Q
S
● Playback with ANC Filter Profile (f = 192kHz)
S
• 9.85mW P (AMIC FF+FB Profile)
Q
• 6.7mW P (AMIC FF Only Profile)
Q
• 7mW P (DMIC FF+FB Profile)
Q
● Full-Scale Playback Power at 1% THD+N:
• 31mW into 32Ω (1V
Full-Scale Mode)
RMS
• 15mW into 32Ω (Reduced Swing Mode)
• 61mW into 16Ω (1V
2
Full-Scale Mode)
RMS
The flexible digital audio interface supports common PCM
audio data formats such as I S, left-justified, and TDM tim-
2
● Flexible I S/TDM Digital Audio Interface
ing 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.
• 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
2
● 6.7mm 36-Bump WLP Package
2
The device is available in a small 6.7mm 36-bump WLP
• 0.4mm Pitch with a 0.5mm Height
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.
Ordering Information appears at end of data sheet.
19-100956; Rev 0; 11/20
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