General Description

The CS42325 is a highly integrated stereo audio CODEC. The CS42325 performs stereo analog-todigital (A/D) and up to four channels of digital-to-analog (D/A) conversion of up to 24-bit serial values at sample rates up to 96 kHz.

D/A Features

? Dual 24-bit Stereo DACs

? 100 dB Dynamic Range (A-Wtd)

? -90 dB THD+N

? Integrated Line Driver

– 2 Vrms Output

– Single-Ended Outputs

? Integrated Headphone Driver

– 2 x 10 mW into 32 Ω

? Stereo 7:1 Output Multiplexer

? Volume Control with Soft Ramp

– 0.5 dB Step Size

– Zero Crossing Click-Free Transitions

? Selectable Serial Audio Interface Formats

– Left- or Right-Justified, Up to 24-bit

– I2S Up to 24-bit

? Selectable 50/15 μs De-Emphasis

? Internal Analog Mute

? Control Output for External Muting

? Popguard? Technology

A/D Features

? Single 24-bit Stereo ADC

? Stereo 5:1 Input Multiplexer

? 2 Vrms Single-Ended Inputs

? 95 dB Dynamic Range (A-Wtd)

? -88 dB THD+N

? Digital Volume Control with Soft Ramp

– 0.5 dB Step Size

? Selectable Serial Audio Interface Formats

– Left-Justified

– I2S

? High-Pass Filter or DC Offset Calibration

System Features

? High Performance 24-bit Converters

– Multi-bit Delta-Sigma Modulator

– Up to 96 kHz Sampling Rates

? Direct Interface with 1.8 V to 3.3 V Logic Levels

? Supports Asynchronous Serial Port Operation

– Two Independent Clock Domains

– ADC, DAC1, and DAC2 can be Independently Assigned to the Two Clock Domains

– Each Serial Port Supports Master or Slave Operation

? Internal Digital Loopback

? +3.3 V Analog Power Supply

? +3.3 V Digital Power Supply

? +9 V to +12 V High-Voltage Power Supply

? Hardware or Software Mode Configuration

– Supports I2C? and SPI? Software Interface