Low Power, Hi-Fi Audio Codec with Four Headphone Drivers

CS42L92 is a low power, 32-bit, multichannel high-fidelity audio codec featuring four stereo headphone drivers and up to four analog and eight digital microphone inputs. A smart accessory interface with multipurpose impedance sensing and measurement capabilities, supports dual detection of 3.5 mm and USB-C headsets connectors and push buttons. An integrated DSP provides general-purpose signal processing capability with a general-purpose timer and event-logger functions. The CS42L92 is configured using the SLIMbus, SPI™, or I²C interfaces. Voice and ultrasonic input paths run concurrent with native audio playback at sample rates up to 384 kHz. The power, clocking, and output driver architectures are designed to maximize battery life in voice, music, and standby modes. Low power (10 µA) Sleep Mode is supported, with configurable wake-up events (e.g., voice-trigger) using either analog or digital input. The device is powered from 1.8 V and 1.2 V supplies.

Technologies

Smart Codecs

Features

  • 32-bit hi-fi audio codec
  • Low power 10 µA sleep mode
  • Powered from 1.8 V and 1.2 V supplies
  • Audio playback up to 384 kHz sample rate, with concurrent voice, ultrasonic input signal paths
  • SNR 99 dB, mic input 48 kHz
  • Headphone playback 127 dB SNR
  • Total harmonic distortion and noise -100 dB (THD+N)
  • 4 analog or 8 digital microphone (DMIC) inputs
  • Multipurpose headphone/earpiece/line output drivers
  • Flexible clocking, low frequency-locked loops (FLLs) support reference clocks down to 32 kHz
  • Up to 16 GPIO pins
  • Small WLCSP package, 0.4 mm staggered 104-ball array

Parametric Specifications

DACs 4
ADCs 4
DAC Dynamic Range (dB) 115
DAC THD+N (dB) -100
ADC THD+N (dB) -88
Sample Rate (kHz) 0-384
Analog Power Supply (V) 1.8
Digital Power Supply (V) 1.2
Power Consumption (mW) 3.6-48.8
Package 104 WLCSP

SmartHIFI

For more information about Cirrus Logic's Hi-Fi product line, visit the Hi-Fi Audio page.

Software and Tools

Device Pack for CS42L92

Nov 20, 2017, v1.0.2 : 12.6 Mb

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Comprehensive Solutions