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