CS4365 114 dB, 192 kHz 6-Channel D/A Converter Features Description The CS4365 is a complete 6-channel digital-to-analog Advanced Multi-bit Delta Sigma Architecture system. This D/A system includes digital de-emphasis, half-dB step size volume control, ATAPI channel mix- 24-bit Conversion ing, selectable fast and slow digital interpolation filters followed by an oversampled, multi-bit delta sigma mod- Automatic Detection of Sample Rates up to ulator which includes mismatch-shaping technology 192 kHz that eliminates distortion due to capacitor mismatch. Following this stage is a multi-element switched capac- 114 dB Dynamic Range itor stage and low-pass filter with differential analog outputs. -100 dB THD+N The CS4365 also has a proprietary DSD processor Direct Stream Digital Mode which allows for volume control and 50 kHz on-chip fil- tering without an intermediate decimation stage. It also Non-Decimating Volume Control offers an optional path for direct DSD conversion by di- On-Chip 50 kHz Filter rectly using the multi-element switched capacitor array. Matched PCM and DSD Analog Output Levels The CS4365 is available in a 48-pin LQFP package in both Commercial (-40C to +85C) and Automotive Selectable Digital Filters (-40C to +105C) grades. The CDB4365 Customer Demonstration board is also available for device evalu- Volume Control with 1/2-dB Step Size and Soft ation and implementation suggestions. Please see Ramp Ordering Information on page 51 for complete details. The CS4365 accepts PCM data at sample rates from Low Clock-Jitter Sensitivity 4 kHz to 216 kHz, DSD audio data, and delivers excel- lent sound quality. These features are ideal for multi- +5 V Analog Supply, +2.5 V Digital Supply channel audio systems, including SACD players, A/V receivers, digital TVs, mixing consoles, effects proces- Separate 1.8 to 5 V Logic Supplies for the Control and Serial Ports sors, sound cards, and automotive audio systems. Control Port Supply = 1.8 V to 5 V Digital Supply = 2.5 V Analog Supply = 5 V Hardware Mode or 2 I C/SPI Software Mode Control Data Internal Voltage Register/Hardware Reference Configuration Reset Serial Audio Port Supply = 1.8 V to 5 V Six Channels of Switch-Cap 6 Volume Digital Multi-bit Differential DAC and 6 Controls Filters Modulators Outputs Analog Filters 6 PCM Serial Audio Input DSD Audio DSD Processor External Mute Input Mute Signals -Volume control Control 6 -50 kHz filter Copyright Cirrus Logic, Inc. 2008 FEB 08 (All Rights Reserved) CS4365 TABLE OF CONTENTS 1. PIN DESCRIPTION ................................................................................................................................ 6 2. CHARACTERISTICS AND SPECIFICATIONS ...................................................................................... 8 RECOMMENDED OPERATING CONDITIONS ..................................................................................... 8 ABSOLUTE MAXIMUM RATINGS ......................................................................................................... 8 DAC ANALOG CHARACTERISTICS - COMMERCIAL (-CQZ) ............................................................. 9 DAC ANALOG CHARACTERISTICS - AUTOMOTIVE (-DQZ) ............................................................ 10 POWER AND THERMAL CHARACTERISTICS .................................................................................. 11 COMBINED INTERPOLATION & ON-CHIP ANALOG FILTER RESPONSE ...................................... 12 COMBINED INTERPOLATION & ON-CHIP ANALOG FILTER RESPONSE (CONTINUED) .............. 13 DSD COMBINED DIGITAL & ON-CHIP ANALOG FILTER RESPONSE ............................................. 13 DIGITAL CHARACTERISTICS ............................................................................................................. 14 SWITCHING CHARACTERISTICS - PCM ........................................................................................... 15 SWITCHING CHARACTERISTICS - DSD ........................................................................................... 16 SWITCHING CHARACTERISTICS - CONTROL PORT - IC FORMAT .............................................. 17 SWITCHING CHARACTERISTICS - CONTROL PORT - SPI FORMAT ............................................. 18 3. TYPICAL CONNECTION DIAGRAM .................................................................................................. 19 4. APPLICATIONS ................................................................................................................................... 21 4.1 Master Clock ................................................................................................................................... 21 4.2 Mode Select .................................................................................................................................... 22 4.3 Digital Interface Formats ................................................................................................................ 23 4.3.1 OLM 1 .................................................................................................................................. 24 4.3.2 OLM 2 .................................................................................................................................. 24 4.4 Oversampling Modes ...................................................................................................................... 24 4.5 Interpolation Filter ........................................................................................................................... 25 4.6 De-Emphasis .................................................................................................................................. 25 4.7 ATAPI Specification ........................................................................................................................ 26 4.8 Direct Stream Digital (DSD) Mode .................................................................................................. 26 4.9 Grounding and Power Supply Arrangements ................................................................................. 27 4.9.1 Capacitor Placement ............................................................................................................. 27 4.10 Analog Output and Filtering .......................................................................................................... 28 4.11 The MUTEC Outputs .................................................................................................................... 29 4.12 Recommended Power-Up Sequence ........................................................................................... 29 4.12.1 Hardware Mode ................................................................................................................... 29 4.12.2 Software Mode .................................................................................................................... 30 4.13 Recommended Procedure for Switching Operational Modes ....................................................... 30 4.14 Control Port Interface ................................................................................................................... 30 4.14.1 MAP Auto Increment ........................................................................................................... 30 4.14.2 IC Mode .............................................................................................................................. 30 4.14.2.1 IC Write ................................................................................................................... 31 4.14.2.2 IC Read .................................................................................................................. 31 4.14.3 SPI Mode ............................................................................................................................. 32 4.14.3.1 SPI Write .................................................................................................................. 32 4.15 Memory Address Pointer (MAP) .................................................................................................. 32 4.15.1 INCR (Auto Map Increment Enable) .................................................................................... 32 4.15.2 MAP4-0 (Memory Address Pointer) .................................................................................... 32 5. REGISTER QUICK REFERENCE ....................................................................................................... 33 6. REGISTER DESCRIPTION .................................................................................................................. 34 6.1 Chip Revision (address 01h) ......................................................................................................... 34 6.1.1 Part Number ID (PART) Read Only .................................................................................... 34 6.2 Mode Control 1 (address 02h) ........................................................................................................ 34 6.2.1 Control Port Enable (CPEN) .................................................................................................. 34 6.2.2 Freeze Controls (FREEZE) ................................................................................................... 34 2 DS670F2