Datasheet
CS48L32 Datasheet
DS1219F4 | 6 MBNovember 2019
Active
CodecsCS48L32
Low-Power DSP with Microphone Interface and “Always on Voice” for Portable Audio Applications
CS48L32 Overview
The CS48L32 combines power optimized mic inputs with a programmable HaloCore™ to provide a platform for low-power input voice processing; ideal for IOT devices, wearable and mobile applications where maximizing the battery life is essential.The CS48L32 features a 24-bit audio processor with 104 dB signal-to-noise ratio (SNR) mic input (16 kHz) and supports up to four analog or four digital microphone (DMIC) inputs. Low-power input modes are available for “always on voice” (i.e., voice trigger) functionality using either analog or digital input. Two additional digital audio serial ports can support a wide range of audio sample rates and serial interface formats. This IC can be powered from 1.8 and 1.2 volt supplies and its power, clocking and output driver architectures are designed to maximize battery life when in voice, music and standby modes.
The Halo Core DSP supports multiple concurrent audio features, including voice-trigger detection, noise reduction, media enhancement, plus more. Support for third-party DSP programming provides far-reaching opportunities for product differentiation.
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Product Features
HaloCore™ digital signal processor
Dual MAC, 100 MHz audio signal processor
280 kB program memory, 768 kB data memory
FFT, LMS and FIR accelerators
Event logger with time stamp and interrupt functions
Up to 4 analog or 4 digital microphone inputs
Two multi-channel audio serial ports (ASP), supporting data formats up to 192 kHz, 32 bits
Flexible clocking configuration, incorporating a low-power frequency-locked loop (FLL)
2 A/D Converters
SnR = 99 dB
THD+N = –88 dB
Sample rate 8 -> 192 kHz
Integrated micbias support
Multi-channel sample-rate conversion
Configurable functions on multiple GPIOs
Small WLCSP package (0.4-mm ball array)
Parametric Specifications
| Analog Input Type | Differential |
| Analog Output Type | Differential |
| Channels In | 4 |
| Channels Out | 0 |
| Control Interface | SPI |
| ADC Dynamic Range (dB) | 104 |
| ADC THD+N (dB) | -88 |
| Sample Rate (kHz) | 8-192 |
| Analog Power Supply (V) | 1.8 |
| Digital Power Supply (V) | 1.2 |
| Logic Power Supply (V) | 1.8-3.3 |
| DSP Included | Yes |
| Target Market | Consumer |
| Package | 64 WLCSP; 64 QFN |
Design Resources
Application Note
QFN Package PCB Footprint and Soldering Guidelines
WAN_0118 | 740 KBSeptember 2014
Application Note
Surface Mount Assembly Considerations for WLCSP Devices
AN397R1 | 428 KBNovember 2020
Software Packages
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