CS42L92 Overview
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.
Product 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
| Package | 104 WLCSP |
| Analog Input Type | Differential |
| Analog Output Type | Differential |
| Channels In | 8 |
| Channels Out | 8 |
| Control Interface | SPI/I²C |
| ADC Dynamic Range (dB) | 99 |
| DAC Dynamic Range (dB) | 115 |
| ADC THD+N (dB) | -88 |
| DAC THD+N (dB) | -100 |
| Sample Rate (kHz) | 8-384 |
| Analog Power Supply (V) | 1.8 |
| Digital Power Supply (V) | 1.2 |
| Logic Power Supply (V) | 1.8-3.3 |
| Power Consumption (mW) | 3.6-48.8 |