General Description

The CS4245 is a highly integrated stereo audio CODEC. The CS4245 performs stereo analog-to-digital (A/D) and digital-to-analog (D/A) conversion of up to 24-bit serial values at sample rates up to 192 kHz.

D/A Features

♦ Multi-bit Delta Sigma Modulator

♦ 104 dB Dynamic Range

♦ -90 dB THD+N

♦ Up to 192 kHz Sampling Rates

♦ Single-Ended Analog Architecture

♦ Volume Control with Soft Ramp

– 0.5 dB Step Size

– Zero Crossing, Click-Free Transitions

♦ Popguard® Technology

– Minimizes the Effects of Output Transients

♦ Filtered Line-Level Outputs

♦ Selectable Serial Audio Interface Formats

– Left-Justified up to 24-bit

– I²S up to 24-bit

– Right-Justified 16-, 18-, 20-, and 24-bit

♦ Selectable 50/15 µs De-Emphasis

♦ Control Output for External Muting

A/D Features

♦ Multi-bit Delta Sigma Modulator

♦ 104 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 Serial Audio Interface Formats

– Left-Justified up to 24-bit

– I²S up to 24-bit

♦ High-Pass Filter or DC Offset Calibration

System Features

♦ Direct Interface with 1.8 V to 5 V Logic Levels

♦ Optional Asynchronous Serial Port Operation

– Each Serial Port Supports Master or Slave Operation

♦ Selectable Auxiliary Analog Output

– Allows Analog Monitoring of Either the ADC Input Signal after PGA or DAC Output Signal

♦ Internal Digital Loopback

♦ Power-Down Mode

– Available for A/D, D/A, CODEC, Mic Preamplifier

♦ +3.3 V to +5 V Analog Power Supply

♦ +3.3 V to +5 V Digital Power Supply

♦ Supports I²C® and SPITM Control Port Interfaces

♦ Pin-Compatible with CS5345