CS47L35 datasheet(2/300 Pages) CIRRUS

2 / 300 page

DS1085F3

CS47L35

Description

The CS47L35 is a highly integrated, low-power audio hub for smartphones, tablets, and other portable audio devices. It

combines an advanced DSP feature set with a flexible, high-performance audio hub codec. The CS47L35 combines three

programmable DSP cores with a variety of power-efficient fixed-function audio processors. Flexible GPIO and an I2C

master interface are also incorporated, enabling sensor-hub connectivity.

The DSP cores support multiple concurrent audio features, including multimic wideband noise reduction,

high-performance acoustic-echo cancelation (AEC), speech enhancement, advanced media enhancement, and many

more. The DSP cores are supported by a fully flexible, all-digital mixing and routing engine with sample-rate converters,

for wide use-case flexibility. Support for third-party DSP programming provides far-reaching opportunities for product

differentiation.

A SLIMbus interface supports multichannel audio paths and host control register access. Three further digital audio

interfaces are provided, each supporting a wide range of standard audio sample rates and serial interface formats.

Automatic sample-rate detection enables seamless wideband/narrowband voice-call handover.

The stereo headphone driver provides ground-referenced output, with noise levels as low as 0.8

VRMS for hi-fi quality line

or headphone output. The CS47L35 also features a mono bridge-tied load (BTL) earpiece output, mono 2.7-W Class D

speaker driver, two channels of stereo PDM output, and an IEC-60958-3–compatible S/PDIF transmitter. A signal

generator for controlling haptics devices is included; vibe actuators can connect directly to the Class D speaker output, or

via an external driver on the PDM output interface.

The CS47L35 supports up to six analog inputs, and up to four PDM digital inputs. Microphone activity detection with

interrupt is available. A smart accessory interface supports most standard 3.5-mm accessories. Impedance sensing and

measurement is provided for external accessory and push-button detection (Android™ headset specification compliant).

The CS47L35 is configured using the SLIMbus, SPI™, or I2C interfaces. The integrated FLL provides support for a wide

range of system-clock frequencies. The device is powered from 1.8- and 1.2-V supplies. (A separate 4.2-V battery supply

is typically required for the Class D speaker drivers). The power, clocking, and output driver architectures are designed to

maximize battery life in voice, music, and standby modes. Low-power (10

A) Sleep Mode is supported, with configurable

wake-up events.

CS47L35 数据表(PDF) 2 Page - Cirrus Logic