PDF CS42448 Data sheet ( Hoja de datos )

Número de pieza	CS42448
Descripción	Surround-sound Codecs
Fabricantes	Cirrus Logic
Logotipo
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No Preview Available ! CS42448 108 dB, 192 kHz 6-In, 8-Out CODEC FEATURES GENERAL DESCRIPTION Six 24-bit A/D, Eight 24-bit D/A Converters ADC Dynamic Range – 105 dB Differential – 102 dB Single-Ended DAC Dynamic Range – 108 dB Differential – 105 dB Single-Ended ADC/DAC THD+N – -98 dB Differential – -95 dB Single-Ended Compatible with Industry-Standard Time Division Multiplexed (TDM) Serial Interface System Sampling Rates up to 192 kHz Programmable ADC High-Pass Filter for DC Offset Calibration www.DataSheet4U.com Logarithmic Digital Volume Control I²C® & SPI™ Host Control Port Supports Logic Levels Between 5 V and 1.8 V Popguard® Technology The CS42448 CODEC provides six multi-bit analog-to- digital and eight multi-bit digital-to-analog delta-sigma converters. The CODEC is capable of operation with ei- ther differential or single-ended inputs and outputs, in a 64-pin LQFP package. Six fully differential, or single-ended, inputs are avail- able on stereo ADC1, ADC2, and ADC3. When operating in Single-ended Mode, an internal MUX be- fore ADC3 allows selection from up to four single-ended inputs. Digital volume control is provided for each ADC channel, with selectable overflow detection. All eight DAC channels provide digital volume control and can operate with differential or single-ended outputs. An auxiliary serial input is available for an additional two channels of PCM data. The CS42448 is available in a 64-pin LQFP package in Commercial (-10° to +70°) and Automotive (-40° to +105°) grades. The CDB42448 Customer Demonstra- tion board is also available for device evaluation and implementation suggestions. Please refer to “Ordering Information” on page 64 for complete ordering information. The CS42448 is ideal for audio systems requiring wide dynamic range, negligible distortion and low noise, such as A/V receivers, DVD receivers, and automotive audio systems. Control Port & Serial Audio Port Supply = 1.8 V to 5 V Digital Supply = 3.3 V to 5 V Analog Supply = 3.3 V to 5 V I2C/SPI Software Mode Control Data Interrupt Reset Register Configuration ADC Overflow & Clock Error Interrupt Internal Voltage Reference External Mute Control Mute Control Serial Audio Input Auxilliary Serial Audio Input Input Master Clock Serial Audio Output http://www.cirrus.com Volume Controls Digital Filters ΔΣ Modulators Multibit DAC1-4 and 8 Differential or Single-Ended Analog Filters Outputs 8 High Pass Filter High Pass Filter Digital Filters Digital Filters Multibit Oversampling ADC1&2 Multibit Oversampling ADC3 4 4 2 2 Optional MUX allows selection from up to 4 single-ended inputs. Copyright © Cirrus Logic, Inc. 2006 (All Rights Reserved) Differential or Single-Ended Analog Inputs NOVEMBER '06 DS648F2 1 page CS42448 Figure 36.DSM Stopband Rejection .......................................................................................................... 57 Figure 37.DSM Transition Band ................................................................................................................ 57 Figure 38.DSM Transition Band (Detail) ................................................................................................... 58 Figure 39.DSM Passband Ripple .............................................................................................................. 58 Figure 40.QSM Stopband Rejection ......................................................................................................... 58 Figure 41.QSM Transition Band ................................................................................................................ 58 Figure 42.QSM Transition Band (Detail) ................................................................................................... 58 Figure 43.QSM Passband Ripple .............................................................................................................. 58 Figure 44.SSM Stopband Rejection .......................................................................................................... 59 Figure 45.SSM Transition Band ................................................................................................................ 59 Figure 46.SSM Transition Band (detail) .................................................................................................... 59 Figure 47.SSM Passband Ripple .............................................................................................................. 59 Figure 48.DSM Stopband Rejection .......................................................................................................... 59 Figure 49.DSM Transition Band ................................................................................................................ 59 Figure 50.DSM Transition Band (detail) .................................................................................................... 60 Figure 51.DSM Passband Ripple .............................................................................................................. 60 Figure 52.QSM Stopband Rejection ......................................................................................................... 60 Figure 53.QSM Transition Band ................................................................................................................ 60 Figure 54.QSM Transition Band (detail) .................................................................................................... 60 Figure 55.QSM Passband Ripple .............................................................................................................. 60 LIST OF TABLES www.DataSheet4U.com Table 1. I/O Power Rails ............................................................................................................................. 8 Table 2. Single-Speed Mode Common Frequencies ................................................................................ 30 Table 3. Double-Speed Mode Common Frequencies ............................................................................... 30 Table 4. Quad-Speed Mode Common Frequencies ................................................................................. 30 Table 5. I²S, LJ, RJ Clock Ratios .............................................................................................................. 31 Table 6. OLM#1 Clock Ratios ................................................................................................................... 31 Table 7. OLM#2 Clock Ratios ................................................................................................................... 31 Table 8. TDM Clock Ratios ....................................................................................................................... 31 Table 9. Serial Audio Interface Channel Allocations ................................................................................. 34 Table 10. MCLK Frequency Settings for I²S, Left and Right Justified Interface Formats .......................... 43 Table 12. DAC Digital Interface Formats .................................................................................................. 44 Table 11. MCLK Frequency Settings for TDM & OLM Interface Formats ................................................. 44 Table 13. ADC Digital Interface Formats .................................................................................................. 45 Table 14. Example AOUT Volume Settings .............................................................................................. 49 Table 15. Example AIN Volume Settings .................................................................................................. 50 DS648F2 5 5 Page CS42448 ANALOG INPUT CHARACTERISTICS (COMMERCIAL) (Test Conditions (unless otherwise specified): TA = -10 to +70°C; VD = VLS = VLC = 3.3 V±5%, VA = 5 V±5%; Full-scale input sine wave: 1 kHz through the active input filter in Figure 26 on page 53 and Figure 27 on page 53; Measurement Bandwidth is 10 Hz to 20 kHz.) Parameter Fs=48 kHz, 96 kHz, 192 kHz Dynamic Range A-weighted unweighted 40 kHz bandwidth unweighted Total Harmonic Distortion + Noise (Note 5) 40 kHz bandwidth -1 dB -20 dB -60 dB -1 dB ADC1-3 Interchannel Isolation ADC3 MUX Interchannel Isolation DC Accuracy Interchannel Gain Mismatch Gain Drift Analog Input Full-Scale Input Voltage Differential Input Impedance (Note 6) www.DataSheet4U.com Single-Ended Input Impedance (Note 7) Common Mode Rejection Ratio (CMRR) Differential Min Typ Max 99 105 96 102 - 99 - - - - -98 -92 - -82 - - -42 - - -90 - - 90 - - 90 - - 0.1 - - ±100 - 1.06VA 1.12VA 1.18VA 18 - - --- - 82 - Single-Ended Min Typ Max 96 102 93 99 96 - - - - -95 -89 - -79 - - -39 - - -90 - - 90 - - 90 - - 0.1 - - ±100 - 0.53VA 0.56VA 0.59*VA --- 18 - - --- Unit dB dB dB dB dB dB dB dB dB dB ppm/°C Vpp kΩ kΩ dB DS648F2 11 11 Page

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