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CDB42L52 データシート(PDF) 2 Page - Cirrus Logic |
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CDB42L52 データシート(HTML) 2 Page - Cirrus Logic |
2 / 82 page 2 DS680F1 CS42L52 5/13/08 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 General Description The CS42L52 is a highly integrated, low-power stereo CO- DEC with headphone and Class D speaker amplifiers. The CS42L52 offers many features suitable for low-power, porta- ble system applications. The ADC input path allows independent channel control of a number of features. Input summing amplifiers mix and select line-level and/or microphone-level inputs for each channel. The microphone input path includes a selectable programma- ble-gain pre-amplifier stage and a low-noise MIC bias voltage supply. A PGA is available for line or microphone inputs and provides analog gain with soft-ramp and zero-cross transi- tions. The ADC also features a digital volume control with soft ramp transitions. A programmable ALC and Noise Gate mon- itor the input signals and adjust the volume levels appropriately. To conserve power, the ADC may be bypassed while still allowing full analog volume control. 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. The Digital Mixer provides independent volume control for both the ADC output and PCM input signal paths, as well as a master volume control. 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 func- tions and a BEEP generator, 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 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. In addition to its many features, the CS42L52 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 CS42L52 is available in a 40-pin QFN package in both Commercial (-40 to +85 °C) and Automotive (-40 to +105 °C) grades. The CS42L52 Customer Demonstration board is also available for device evaluation and implementation sugges- tions. Please refer to “Ordering Information” on page 81 for complete ordering information. |
同様の部品番号 - CDB42L52 |
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同様の説明 - CDB42L52 |
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