CS42L51 Low-Power, Stereo Codec with Headphone Amp DIGITAL-TO-ANALOG FEATURES ANALOG-TO-DIGITAL FEATURES 98-dB dynamic range (A-weighted) 98-dB dynamic range (A-weighted) -86-dB THD+N -88-dB THD+N Headphone amplifier - GND centered Analog gain controls On-chip charge pump provides VA HP +32-dB or +16-dB mic preamplifiers No DC-blocking capacitor required Analog programmable gain amplifier (PGA) 46-mW power into stereo 16 1.8 V +20-dB digital boost 88-mW power into stereo 16 2.5 V Programmable automatic level control (ALC) -75 dB THD+N Noise gate for noise suppression Programmable threshold and Digital signal processing engine attack/release rates Bass & treble tone control, de-emphasis Independent channel control PCM + ADC mix with independent volume control Digital volume control Master digital volume control High-pass filter disable for DC measurements Soft ramp & zero-cross transitions Stereo 3:1 analog input MUX Beep generator Dual mic inputs Tone selections across two octaves Programmable, low noise mic bias levels Separate volume control Differential mic mix for common mode noise rejection Programmable on & off time intervals Very low 64 Fs oversampling clock reduces Continuous, periodic or one-shot beep power consumption selections Programmable peak-detect and limiter Pop and click suppression 1.8Vto3.3V 1.8Vto2.5V 1.8Vto2.5V 1.8Vto2.5V MUX Switched Headphone CapacitorDAC AmpGND LeftHPOut Digital andFilter Centered SerialAudio Signal Beep Multibit Input Generator Processing Modulator Switched Headphone Engine CapacitorDAC AmpGND RightHPOut HardwareMode MUX andFilter Centered 2 orI C&SPI SoftwareMode ControlData Charge Pump ALC Reset StereoInput1 Multibit StereoInput2 Oversampling MUX PGA ADC Volume +32dB HighPass MUX SerialAudio StereoInput3/ Controls Filters Output MicInput1&2 Multibit +32dB Oversampling MUX PGA ADC MIC Register Bias ALC Configuration Copyright Cirrus Logic, Inc. 20052015 DS679F2 (All Rights Reserved) AUG 15 CS42L51 SYSTEM FEATURES GENERAL DESCRIPTION 24-bit converters The CS42L51 is a highly integrated, 24-bit, 96-kHz, low 496-kHz sample rate power stereo codec. Based on multi-bit, delta-sigma Multibit deltasigma architecture modulation, it allows infinite sample rate adjustment be- tween 4 kHz and 96 kHz. Both the ADC and DAC offer Low power operation many features suitable for low power, portable system Stereo playback: 12.93 mW 1.8 V applications. Stereo record and playback: 20.18 mW 1.8 V The ADC input path allows independent channel control of a number of features. An input multiplexer selects be- Variable power supplies tween line-level or microphone level inputs for each 1.82.5 V digital & analog channel. The microphone input path includes a select- 1.83.3 V interface logic able programmable-gain pre-amplifier stage and a low Power down management noise MIC bias voltage supply. A PGA is available for line or microphone inputs and provides analog gain with ADC, DAC, codec, mic preamplifier, PGA soft ramp and zero-cross transitions. The ADC also fea- Software Mode (IC and SPI control) tures a digital volume attenuator with soft ramp Hardware mode (stand-alone control) transitions. A programmable ALC and Noise Gate mon- Digital routing/mixes: itor the input signals and adjust the volume levels appropriately. Analog out = ADC + Digital In Digital out = ADC + Digital In The DAC output path includes a digital signal process- ing engine. Tone Control provides bass and treble Internal digital loopback adjustment of four selectable corner frequencies. The Mono mixes Mixer allows independent volume control for both the Flexible clocking options ADC mix and the PCM mix, as well as a master digital Master or slave operation volume control for the analog output. All volume level changes may be configured to occur on soft ramp and High-impedance digital output option (for zero-cross transitions. The DAC also includes de-em- easy MUXing between the codec and other data sources) phasis, limiting functions and a beep generator delivering tones selectable across a range of two full Quarter-speed mode (i.e., Allows 8 kHz Fs octaves. while maintaining a flat noise floor up to 16 kHz) The stereo headphone amplifier is powered from a sep- arate positive supply and the integrated charge pump APPLICATIONS provides a negative supply. This allows a ground-cen- HDD and flash-based portable audio players tered analog output with a wide signal swing and MD players/recorders eliminates external DC-blocking capacitors. PDAs In addition to its many features, the CS42L51 operates Personal media players from a low-voltage analog and digital core, making this codec ideal for portable systems that require extremely Portable game consoles low power consumption in a minimal amount of space. Digital voice recorders The CS42L51 is available in a 32-pin QFN package in Digital camcorders both Commercial (-10 to +70 C) and Automotive Digital cameras grades (-40 to +85 C). The CDB42L51 Customer Smart phones Demonstration board is also available for device evalu- ation and implementation suggestions. Please see Ordering Information on page 83 for complete details. 2 DS679F2