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