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CS43L22 Datasheet(PDF) 2 Page - Cirrus Logic |
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CS43L22 Datasheet(HTML) 2 Page - Cirrus Logic |
2 / 66 page 2 DS792F2 CS43L22 Confidential Draft 3/4/10 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 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 – DAC, Passthrough Amplifier, Headphone Amplifier, Speaker Amplifier Flexible Clocking Options – Master or Slave Operation – 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 I²CTM Control Port Operation Headphone/Speaker Detection Input Pop and Click Suppression Pin-Compatible w/CS42L52 Applications PDA’s Personal Media Players Portable Game Consoles General Description The CS43L22 is a highly integrated, low power stereo DAC with headphone and Class D speaker amplifiers. The CS43L22 offers many features suitable for low power, porta- ble system applications. The DAC output path includes a digital signal processing en- gine with various fixed function controls. Tone Control provides bass and treble adjustment of four selectable corner frequencies. Digital Volume controls may be configured to change on soft ramp transitions while the analog controls can be configured to occur on every zero crossing. The DAC also includes de-emphasis, limiting functions and a BEEP genera- tor delivering tones selectable across a range of two full octaves. The stereo headphone amplifier is powered from a separate positive supply and the integrated charge pump provides a negative supply. This allows a ground-centered analog output with a wide signal swing and eliminates the need for external DC-blocking capacitors. The Class D stereo speaker amplifier does not require an external filter and provides the high efficiency amplification re- quired by power sensitive portable applications. The speaker amplifier may be powered directly from a battery while the in- ternal DC supply monitoring and compensation provides a constant gain level as the battery’s voltage decays. The CS43L22 accommodates analog routing of the analog in- put signal directly to the headphone amplifier. This feature is useful in applications that utilize an FM tuner where audio re- covered over-the-air must be transmitted to the headphone amplifier directly. In addition to its many features, the CS43L22 operates from a low voltage analog and digital core making it ideal for portable systems that require extremely low power consumption in a minimal amount of space. The CS43L22 is available in a 40-pin QFN package in Com- mercial (-40 to +85 °C) grade. The CS43L22 Customer Demonstration board is also available for device evaluation and implementation suggestions. Please refer to “Ordering In- formation” on page 66 for complete ordering information. |
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