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