CS42888 108 dB, 192 kHz 4-In, 8-Out CODEC FEATURES GENERAL DESCRIPTION Four 24-bit A/D, Eight 24-bit D/A Converters The CS42888 CODEC provides four multi-bit ana- log-to-digital and eight multi-bit digital-to-analog ADC Dynamic Range delta-sigma converters. The CODEC is capable of op- 105 dB Differential eration with either differential or single-ended inputs 102 dB Single-Ended and outputs, in a 64-pin LQFP package. Four fully differential, or single-ended, inputs are avail- DAC Dynamic Range able on stereo ADC1and ADC2. Digital volume control 108 dB Differential is provided for each ADC channel, with selectable over- 105 dB Single-Ended flow detection. ADC/DAC THD+N All eight DAC channels provide digital volume control -98 dB Differential and can operate with differential or single-ended outputs. -95 dB Single-Ended An auxiliary serial input is available for an additional two Compatible with Industry-Standard Time channels of PCM data. Division Multiplexed (TDM) Serial Interface The CS42888 is available in a 64-pin LQFP package in System Sampling Rates up to 192 kHz Commercial (-10C to +70C) and Automotive (-40C to +105C) grades. The CDB42448 Customer Demonstra- Programmable ADC High-Pass Filter for DC tion Board is also available for device evaluation and Offset Calibration implementation suggestions. Please refer to Ordering Information on page61 for complete ordering Logarithmic Digital Volume Control information. IC & SPI Host Control Port The CS42888 is ideal for audio systems requiring wide dynamic range, negligible distortion and low noise, such Supports Logic Levels Between 5 V and 1.8 V as A/V receivers, DVD receivers, and automotive audio Popguard Technology systems. Control Port & Serial Digital Supply = Analog Supply = Audio Port Supply = 3.3 V to 5 V 3.3 V to 5 V 1.8 V to 5 V 2 I C/SPI Software Mode Register Internal Voltage Control Data Configuration Reference External Mute ADC Overflow Mute Control Interrupt Control & Clock Error Reset Interrupt Multibit Differential or Serial Audio Volume Digital 8 DAC1-4 and Single-Ended Input Controls Filters Modulators Analog Filters Outputs 8 Auxilliary Serial Audio Input Multibit High Pass Digital 2 Oversampling Input Master Filter Filters ADC1 Clock 2 Differential or Single- Ended Analog Inputs Multibit High Pass Serial Audio Digital 2 Oversampling Filter Output Filters ADC2 2 Copyright Cirrus Logic, Inc. 2013 (All Rights Reserved) CS42888 TABLE OF CONTENTS 1. PIN DESCRIPTIONS ........................................................................................................................ 6 1.1 Digital I/O Pin Characteristics ........................................................................................................... 8 2. TYPICAL CONNECTION DIAGRAM ................................................................................................. 9 3. CHARACTERISTICS AND SPECIFICATIONS .................................................................................... 10 RECOMMENDED OPERATING CONDITIONS ................................................................................... 10 ABSOLUTE MAXIMUM RATINGS .......................................................................................................10 ANALOG INPUT CHARACTERISTICS (COMMERCIAL) .................................................................... 11 ANALOG INPUT CHARACTERISTICS (AUTOMOTIVE) ..................................................................... 12 ADC DIGITAL FILTER CHARACTERISTICS ....................................................................................... 13 ANALOG OUTPUT CHARACTERISTICS (COMMERCIAL) ................................................................14 ANALOG OUTPUT CHARACTERISTICS (AUTOMOTIVE) ................................................................. 15 COMBINED DAC INTERPOLATION & ON-CHIP ANALOG FILTER RESPONSE .............................. 17 SWITCHING SPECIFICATIONS - ADC/DAC PORT ............................................................................ 18 SWITCHING CHARACTERISTICS - AUX PORT ................................................................................. 20 SWITCHING SPECIFICATIONS - CONTROL PORT - IC MODE ....................................................... 21 SWITCHING SPECIFICATIONS - CONTROL PORT - SPI FORMAT ................................................. 22 DC ELECTRICAL CHARACTERISTICS .............................................................................................. 23 DIGITAL INTERFACE SPECIFICATIONS & CHARACTERISTICS ..................................................... 23 4. APPLICATIONS ................................................................................................................................... 24 4.1 Overview ......................................................................................................................................... 24 4.2 Analog Inputs .................................................................................................................................. 24 4.2.1 Line-Level Inputs ................................................................................................................... 24 4.2.2 High-Pass Filter and DC Offset Calibration ........................................................................... 25 4.3 Analog Outputs ............................................................................................................................... 25 4.3.1 Initialization ............................................................................................................................ 25 4.3.2 Output Transient Control ....................................................................................................... 27 4.3.3 Popguard ............................................................................................................................... 27 4.3.3.1 Power-Up ................................................................................................................... 27 4.3.3.2 Power-Down .............................................................................................................. 27 4.3.4 Mute Control .......................................................................................................................... 27 4.3.5 Line-Level Outputs and Filtering ........................................................................................... 28 4.3.6 Digital Volume Control ........................................................................................................... 28 4.3.7 De-Emphasis Filter ................................................................................................................ 28 4.4 System Clocking ............................................................................................................................. 29 4.5 CODEC Digital Interface Formats .................................................................................................. 30 4.5.1 IS .......................................................................................................................................... 31 4.5.2 Left-Justified .......................................................................................................................... 31 4.5.3 Right-Justified ........................................................................................................................ 31 4.5.4 OLM 1 .................................................................................................................................. 31 4.5.5 OLM 2 .................................................................................................................................. 32 4.5.6 TDM ....................................................................................................................................... 32 4.5.7 I/O Channel Allocation ........................................................................................................... 33 4.6 AUX Port Digital Interface Formats ................................................................................................ 33 4.6.1 IS .......................................................................................................................................... 33 4.6.2 Left-Justified .......................................................................................................................... 33 4.7 Control Port Description and Timing ............................................................................................... 33 4.7.1 SPI Mode ............................................................................................................................... 34 4.7.2 IC Mode ................................................................................................................................ 34 4.8 Interrupts ........................................................................................................................................ 36 4.9 Recommended Power-Up Sequence ............................................................................................. 36 4.10 Reset and Power-Up .................................................................................................................... 36 4.11 Power Supply, Grounding, and PCB Layout ................................................................................ 36 2 DS717F3