General Description
The CS42L52 is a highly integrated, low-power stereo CODEC with headphone and Class D speaker amplifiers. The CS42L52 offers many features suitable for low-power, portable system applications.

Stereo CODEC
♦ High Performance Stereo ADC & DAC
    – 99 dB (ADC), 98 dB (DAC) Dyn. Range (A-wtd)
    – -88 dB THD+N
♦ Flexible Stereo Analog Input Architecture
    – 4:1 Analog Input MUX
    – Analog Input Mixing
    – Analog Passthrough with Volume Control
    – Analog Programmable Gain Amplifier (PGA)
♦ Programmable Automatic Level Control (ALC)
    – Noise Gate for Noise Suppression
    – Programmable Threshold & Attack/Release Rates
♦ Dual MIC Inputs
    – Differential or Single-ended
    – +16 dB to +32 dB w/ 1dB step MIC PreAmplifiers
    – Programmable, Low-noise MIC Bias Levels
♦ Digital Signal Processing Engine
    – Bass & Treble Tone Control, De-emphasis
    – Master Vol. and Independent PCM SDIN + ADC SDOUT Mix Volume Control
    – Soft-ramp & Zero-Cross Transitions
    – Programmable Peak-detect and Limiter
    – Beep Generator w/Full Tone Control

Class D Stereo/Mono Speaker Amplifier
♦ No External Filter Required
♦ High-power Stereo Output at 10% THD+N
    – 2 x 1.00 W into 8 Ω @ 5.0 V
    – 2 x 550 mW into 8 Ω @ 3.7 V
    – 2 x 230 mW into 8 Ω @ 2.5 V
♦ High-power Mono Output at 10% THD+N
    – 1 x 1.90 W into 4 Ω @ 5.0 V
    – 1 x 1.00 W into 4 Ω @ 3.7 V
    – 1 x 350 mW into 4 Ω @ 2.5 V
♦ Direct Battery-powered Operation
    – Battery Level Monitoring & Compensation
♦ 81% Efficiency at 800 mW
♦ Phase-aligned PWM Output Reduces Idle Channel Current
♦ Spread Spectrum Modulation
♦ Low Quiescent Current

Stereo Headphone Amplifier
♦ Ground-centered Outputs
    – No DC-Blocking Capacitors Required
    – Integrated Negative Voltage Regulator
♦ High-power Output at -75 dB THD+N
    – 2 x 23 mW Into 16 Ω @ 1.8 V
    – 2 x 44 mW Into 16 Ω @ 2.5 V

System Features
♦ 12, 24, and 27 MHz Master Clock Support in Addition to Typical Audio Clock Rates
♦ High-performance 24-bit Converters
    – Multi-bit Delta-Sigma Architecture
    – Very Low 64Fs Oversampling Clock Reduces Power Consumption
♦ Low-power Operation
    – Stereo Analog Passthrough: 10 mW @ 1.8 V
    – Stereo Playback: 14 mW @ 1.8 V
    – Stereo Rec. and Playback: 23 mW @ 1.8 V
♦ Variable Power Supplies
    – 1.8 V to 2.5 V Digital & Analog
    – 1.6 V to 5 V Class D Amplifier
    – 1.8 V to 2.5 V Headphone Amplifier
    – 1.8 V to 3.3 V Interface Logic
♦ Power-down Management
    – ADC, DAC, CODEC, MIC Pre-Amplifier, PGA, Headphone Amplifier, Speaker Amplifier
♦ Analog & Digital Routing/Mixes:
    – Line/Headphone Out = Analog In (ADC Bypassed)
    – Line/Headphone/Speaker Out = ADC + Digital In
    – Digital Out = ADC + Digital In
    – Internal Digital Loopback
    – Mono Mixes
♦ Flexible Clocking Options
    – Master or Slave Operation
    – High-impedance Digital Output Option (for easy MUXing between CODEC & other data sources)
    – Quarter-speed Mode - (i.e. allows 8 kHz Fs while maintaining a flat noise floor up to 16 kHz)
    – 4 kHz to 96 kHz Sample Rates
♦ I²C® Control Port Operation
♦ Headphone/Speaker Detection Input
♦ Pop and Click Suppression

Applications
♦ Digital Voice Recorders, Digital Cameras, & Camcorders
♦ PDA’s
♦ Personal Media Players
♦ Portable Game Consoles