CS5346

103 dB A/D Converter with 6:1 Mux

Overview

Description

The CS5346 integrates an analog multiplexer, programmable gain amplifier, and stereo audio analog-to-digital converter. The CS5346 performs stereo analog-to-digital (A/D) conversion of 24-bit serial values at sample rates up to 192 kHz.

A 6:1 stereo input multiplexer is included for selecting between line-level and microphone-level inputs. The microphone input path includes a +32 dB gain stage and a low-noise bias voltage supply. The PGA is available for line or microphone inputs and provides gain/attenuation of ±12 dB in 0.5 dB steps.

The output of the PGA is followed by an advanced 5th order, multi-bit delta sigma modulator and digital filtering/decimation. Sampled data is transmitted by the serial audio interface at rates from 8 kHz to 192 kHz in either Slave or Master Mode.

Integrated level translators allow easy interfacing between the CS5346 and other devices operating over a wide range of logic levels.

Features

• ADC Features
• Multi-bit Delta Sigma Modulator
• 103 dB Dynamic Range
• -95 dB THD+N
• Stereo 6:1 Input Multiplexer
• Programmable Gain Amplifier (PGA)
• ± 12 dB Gain, 0.5 dB Step Size
• Zero-crossing, Click-free Transitions
• Stereo Microphone Inputs
• +32 dB Gain Stage
• Low-noise Bias Supply
• Up to 192 kHz Sampling Rates
• Selectable 24-bit, Left-justified or I²S Serial Audio Interface Formats

• System Features
• Power-down Mode
• +5 V Analog Power Supply, Nominal
• +3.3 V Digital Power Supply, Nominal
• Direct Interface with 3.3 V to 5 V Logic Levels
• Pin Compatible with CS5345

Diagram