CX20721 Ultra Low-Power I2S/I2C Audio CODEC General Description Features Conexant's CX20721 is an ultra low-power, high performance audio Coder-Decoder (CODEC) that supports Integrated Interchip Sound (I2S)/Inter-Integrated Circuit (I2C) host interfaces. The I2S interface includes Time-Division Multiplexing (TDM) support for simultaneous multi-channel operation, and Acoustic Echo Canceler (AEC) reference channels. Host interface signaling levels of 1.5V, 1.8V, and 3.3V are selectable. • With two 24-bit stereo Digital-to-Analog Converters (DACs) operating at sampling frequencies up to 192kHz and two 24-bit stereo Analog-to-Digital Converters (ADCs) operating up to 96kHz, the CODEC supports multi-streaming and Real-Time Communication (RTC) applications. By combining these hardware features with Conexant's playback and voice and speech preprocessing algorithms, this CODEC is the ideal solution for Enterprise platforms needing Lync and Skype, general consumer applications, and high-end gaming/multi-media enthusiasts. The CX20721 has an integrated stereo AudioSmart™ class-D with intelligent power delivery and dynamic signal loudness optimization. SpeakerShield technology provides industry-leading, load-based protection in realtime that includes Direct Current (DC) detection, shortcircuit, near-short, high temperature, and overtemperature. Integrated 14-band hardware Equalizer (EQ) and Dynamic Range Compression (DRC) optimizes speaker response and loudness without distortion to enable a high-quality audio experience on integrated speakers that are independent of a driver and an Operating System (OS). The EQ can also be applied to the headphone path. A four-band hardware EQ is available on the microphone inputs. Additional unlimited bands of EQ and DRC are available in software. • • • • • • • • • • • Host interface supports 1.5V, 1.8V, or 3.3V signaling levels Two pairs of DACs and ADCs have independent sampling rates up to: – 192kHz for DACs – 96kHz for ADCs 2.8WRMS per channel AudioSmart™ class-D with intelligent power delivery and dynamic signal loudness optimization Integrated seven bands per channel EQ and DRC SpeakerShield best industry advanced speaker protection Fully integrated headset support with detect/switch and a universal audio jack Stereo digital microphones for array applications Tunable microphone EQ S/PDIF output supports rates up to 96kHz D3 Live allows external device playback through an internal speaker with full dynamics and protection while the system is asleep Bi-directional EAPD and GPIOs Supports analog and digital PC Beep System Compatibility • • • • I2S for audio streaming and I2C for control Windows 8.x/10 Linux Android The CODEC includes stereo capless headphone output and a headset with integrated detect and switch without an external Bill Of Materials (BOM). A universal jack supports all audio peripherals on one jack. A stereo Digital Microphone Interface (DMIC) supports array applications. Multiple General Purpose Input/ Outputs (GPIOs) are available, as well as a bi-directional External Amplifier Power-Down (EAPD). The CODEC also includes a Sony/Philips Digital Interface Format (S/ PDIF) output. 05/26/15 Conexant Confidential • www.conexant.com 010-21DSR03 CX20721 Data Sheet Revision History Revision History Document No. Release Date Change Description 010-21DSR03 05/26/15 Updated: • • • • • • 010-21DSR02 01/05/15 Updated: • • 010-21DSR01 11/07/14 09/16/14 "CX20721 Block Diagram" figure. "Device Performance Specifications." Updated: • • • • • • 010-21DSR00 "System Compatibility." "Introduction." "CX20721 Audio CODEC Features." "CX20721 Block Diagram" figure. "Analog Performance" table. "Power Consumption" table. "Features." "Introduction." "CX20721 Audio CODEC Features." "Pin Assignments" table. "Analog Performance" table. "Power Consumption" table. Initial release. Conexant Confidential 05/26/15 010-21DSR03 ii CX20721 Data Sheet Table of Contents Table of Contents General Description.......................................................................................................................................................i Features..........................................................................................................................................................................i System Compatibility ....................................................................................................................................................i Revision History ...........................................................................................................................................................ii Introduction...................................................................................................................................................................1 CX20721 Audio CODEC Features................................................................................................................................2 Hardware Interface .......................................................................................................................................................5 General ................................................................................................................................................................................. 5 Host Interface ............................................................................................................................................................. 5 Audio Ports ................................................................................................................................................................. 5 Block Diagram...................................................................................................................................................................... 6 Pin Information .................................................................................................................................................................... 7 Pin Configuration ........................................................................................................................................................ 7 Pin Assignments ......................................................................................................................................................... 8 Device Performance Specifications................................................................................................................................. 10 Power Consumption.......................................................................................................................................................... 12 Package Dimensions..................................................................................................................................................13 Inter-Integrated Circuit (I2C) Interface ......................................................................................................................14 Ordering Information..................................................................................................................................................15 Conexant Confidential 05/26/15 010-21DSR03 iii CX20721 Data Sheet List of Figures List of Figures Figure 1: CX20721 Block Diagram ................................................................................................................................................... 6 Figure 2: CX20721 Pin Configuration ............................................................................................................................................... 7 Figure 3: Package Diagram ............................................................................................................................................................ 13 Conexant Confidential 05/26/15 010-21DSR03 IV CX20721 Data Sheet List of Tables List of Tables Table 1: Pin Assignments ................................................................................................................................................................. 8 Table 2: Analog Performance ......................................................................................................................................................... 10 Table 3: Power Consumption.......................................................................................................................................................... 12 Table 4: Ordering Information......................................................................................................................................................... 15 Conexant Confidential 05/26/15 010-21DSR03 V CX20721 Data Sheet Introduction Introduction Conexant's CX20721 is an ultra low-power, high performance audio CODEC that supports I2S for audio streaming and I2C for control. The I2S interface includes TDM support for simultaneous multi-channel operation, and AEC reference channels. The host interface signaling levels of 1.5V, 1.8V, and 3.3V are selectable. The CX20721 has audio fidelity that exceeds Microsoft desktop and notebook premium logo requirements, including Windows 8.1. With two 24-bit stereo DACs operating at sampling frequencies up to 192kHz and two 24-bit stereo ADCs operating up to 96kHz, the CODEC supports multi-streaming and RTC applications. By combining these hardware features with Conexant's playback and voice and speech preprocessing algorithms, this CODEC is the ideal solution for Enterprise platforms needing Lync and Skype, general consumer applications, and gaming/multi-media enthusiasts. The CX20721 has an integrated stereo AudioSmart™ class-D intelligent power delivery and dynamic signal loudness optimization that is capable of driving up to 2.8WRMS per channel into 4 loads. SpeakerShield technology provides industry-leading, load-based protection in real-time that includes DC detection, short-circuit, near-short, high temperature, and over-temperature. Integrated 14-band hardware EQ and DRC optimizes speaker response and loudness without distortion to enable a high-quality audio experience on integrated speakers that are independent of a driver and an OS. The EQ can also be applied to the headphone path. A four-band hardware EQ is available on the microphone inputs. Additional unlimited bands of EQ and DRC are available in software. ProCoustic capless headphone driver produces a full-range frequency response, and eliminates Alternating Current (AC) coupling capacitors. Integrated headset support with auto-detect and auto-switch between Apple and Nokia-style headsets eliminates all external BOM. In-line headset button sensing enables control of third-party applications directly from the headset, or simply allows the user to wake the system from the headset. A single universal jack supports headsets, headphones, external microphones, and line-in devices. Stereo digital microphones can be connected with integrated boost and DC offset removal. Together with Conexant's AudioSmart voice and speech input processing technologies, this device supports all convertible, detachable, and tablet microphone configurations. The digital microphone clock is programmable and supports low frequency modes to minimize power consumption. Multiple GPIOs and an S/PDIF output that supports sample rates up to 96kHz are available. The D3-Live mode enables external audio devices to play through an input or a universal jack to the internal speakers with full speaker EQ/ DRC while in system is in connected standby, low power, and sleep modes. Conexant's PopShield technology eliminates pops and clicks during all transition states. This technology includes active DC offset removal ground calibration and innovative Vref ramping schemes to avoid pops on AC-coupled paths. The CX20721 has D-Flex power management that exceeds industry power requirements, and consumes minimum power during a connected standby and all low-power system states without pops or clicks. In its non-active lowest power state, the CODEC consumes less than 275μW. Less than 27mW headphone playback power consumption into 32 loads ensures maximum system battery life. The headset center button and jack plug-in wake-up events are supported. Conexant offers comprehensive audio software driver support, with both in-house and third-party software APOs, including Andrea Electronics, Creative Labs, Dolby, DTS, Sonic Focus, MaxxAudio, Waves, and more. Conexant’s AudioSmart voice and speech processing algorithm suite ensures clear voice communication and speech command and control in noisy environments. The Smart Source Pickup (SSP) does not rely on beam-forming techniques, and provides an easy to use powerful solution that requires few or no user controls. The SSP passes the latest Intel ASR certification and Cortana in portrait and landscape modes with just two microphones, and is available for Windows, Linux, and Android. AudioSmart also offers keystroke, screen tapping, and fan noise suppression. Conexant Confidential 05/26/15 010-21DSR03 1 CX20721 Data Sheet CX20721 Audio CODEC Features CX20721 Audio CODEC Features • • • • • Two pairs of independent DACs and ADCs have independent sampling rates up to: – 192kHz for DACs – 96kHz for ADCs 2.8WRMS per channel AudioSmart stereo class-D with spread spectrum and common mode scrambling to reduce Electro-Magnetic Interference (EMI) AudioSmart™ class-D intelligent power delivery and dynamic signal loudness optimization maximizes even small speaker Sound Pressure Level (SPL) and ensures no speaker damage EQ and DRC: – Integrated 14-band hardware programmable EQ ensures optimal speaker frequency response – DRC maximizes loudness while preventing distortion – EQ can be applied to a headphone path – Four-band microphone EQ – Additional unlimited bands of EQ and DRC are available in the software SpeakerShield technology provides real-time, load-based class-D speaker protection that is independent of driver and application—programmable by Basic Input/Output System (BIOS) and includes: – Programmable High-Pass Filter (HPF) protects speakers against damage from high energy, low frequency content – DC protection detects DC voltage across the speakers and prevents damage by immediately shutting down the class-D amplifier – Short circuit protects against straight shorts to ground that can happen during manufacturing – When near-shorts are detected, the amplifier gain adjusts to auto recover and shuts it down if the problem persists – Very high temperature conditions immediately shut off the amplifier – High temperature throttles down the class-D gain to auto recover, or shuts it down if the problem persists Class-D voltage supplies, presence, and accuracy of DAC and class-D clocks are carefully monitored A stereo ProCoustic capless headphone driver delivers more than 20mW into 32 loads with no pops, and eliminates the BOM cost and space of external headphone amplifiers and DC-blocking capacitors Built-in, four-conductor headset jack supports headphone/headset auto-detection, as well as autoswitching between Apple and Nokia-style headsets without any external components Headset in-line command sensing is supported for system wake or application control from a headset button Eliminates external powered speaker hum noise while the system is off—a fully integrated feature that requires no external components Universal audio jack supports all headsets, headphones, external microphones, and external line-in devices on one jack DMIC with DC offset removal and programmable boost supports a stereo digital microphone array. Programmable clock outputs are available, including low frequency modes for low-power operation of DMIC modules. The DMIC interface signaling can run at 1.8V or 3.3V. S/PDIF output supports rates up to 96kHz Record security prevents unwanted recordings from all or selected input ports – • • • • • • • • Conexant Confidential 05/26/15 010-21DSR03 2 CX20721 Data Sheet • • • • • • • • • • • • • • • • • • • • • CX20721 Audio CODEC Features Two-band microphone EQ helps hardware compensation for Skype and Lync certification—additional EQ bands are available in software Integrated headphone limiter supports GS Mark EN50332-2 without an external BOM—selectable through BIOS or a driver/GUI Supports analog and digital PC Beep—Wake-on-Beep never misses a beep, even when in low-power mode Multiple GPIOs are available for custom applications, and can be selected for 1.8V or 3.3V signaling levels Bi-directional EAPD supports external amplifier control for power savings as well as integrated headphone and class-D amplifier shutdown/mute on a single pin—avoids external BOM cost and design complexity CODEC supplies include 5V for class-D, and 1.8V for digital and headphone Integrated Low Drop-Outs (LDOs) provide on-chip clean rails and clean Microphone Bias (micbias) Supports 1.5V, 1.8V, and 3.3V host interface signaling levels Pop Shield II enhanced pop and click suppression on all ports Jack sense detects jack plug events An integrated digital mixer is used to record what is playing pre-EQ, so recorded audio sounds great on all devices and peripherals D3 Live allows external audio devices to play to the internal speakers, with full hardware EQ and DRC while the system is asleep or in low power modes—use your notebook as a speaker dock CODEC consumes less than 275μW in it lowest power state Supports ultra-low power headphone playback into 32 of less than 27mW Available in a 42-pin, thermally-enhanced QFN package AudioSmart speech/voice pre-processing algorithms are available from Conexant: – End-to-end noise reduction – True stereo Acoustic Echo Canceler (AEC) – SSP solves common, real-world problems, and works much better than traditional beam-forming noise reduction approaches—works in all orientations (portrait, landscape, LCD panel flat on a table) with stereo microphone only and without user control changes – Best-in-class keystroke suppression, tap suppression, and fan noise suppression solutions – SSP optimizes hit rates for speech recognition applications like Nuance—solution ensures near flawless hit rates while other processing like keystroke suppression and VOIP enhancements remain enabled simultaneously – Far Field Pickup enables far field speakerphone and group conference call applications 10-band graphic EQ: – Provides additional, user-controlled, enhancements and pre-sets – Night mode boosts vocal clarity while maintaining background sound quality Multi-band dynamic EQ (multi-band DRC) improves the sound quality of low-cost speakers and prevents speaker rattle and distortion—allows different threshold tuning on different frequency bands Phantom bass psycho-acoustic technology creates virtual bass content on mainstream speakers 3D: – Expander widens the audio stage for a fuller and richer sound – Headphones recreates a surround sound, speaker-like environment in headphones so users can enjoy a richer and fuller music listening experience SmartAudio GUI—advanced audio control panel Conexant Confidential 05/26/15 010-21DSR03 3 CX20721 Data Sheet • • CX20721 Audio CODEC Features Audio director for classic and multi-stream selections Third-party software support includes, but is not limited to: – Creative Labs – Dolby – DTS, Inc. – ForteMedia – Andrea Electronics – Waves Conexant Confidential 05/26/15 010-21DSR03 4 CX20721 Data Sheet Hardware Interface Hardware Interface General Host Interface The host interface supports the following common set of signals: • I2S: – MCLK, master clock, input – BCLK, data bit clock, input (slave), output (master) – LRCLK, left/right clock, input (slave), output (master) – ADCDAT, transmit data, output – DACDAT, receive data, input • I2C: – – SCL, serial clock, input SDA, serial data, input/output Audio Ports The following lists the supported audio interface signals: • • • • • • • Port A (PORTA_L and PORTA_R), capless headphone output/line output, headset Port B (PORTB_L and PORTB_R), microphone input/line input with micbias Port C (DMIC_CLK, DMIC_DATA), stereo digital microphone input Port D (PortD_A, PortD_B), analog headset mono microphone input (supports Apple/Nokia-style headset auto-detection and auto-switching with no BOM) Port G (Left+ and Right+), class-D speaker amplifier output, stereo/mono selectable Port I, S/PDIF output PC speaker beep pass-through (PC_BEEP), input Conexant Confidential 05/26/15 010-21DSR03 5 CX20721 Data Sheet Block Diagram Block Diagram The following figure shows the CX20721 block diagram. EAPD/#SPKMUTE #SPKMUTE/GPIO Music REQ/GPIO Port B Micbias Boost Line-In/MIC Jack Port B ADC Boost Micbias D MIC-In Port D 2.2K Headphone Ground 1 Headphone Ground 2 Port C Boost ADC Digital Mic DATA1 CLOCK1 Internal I2S/I2C Beep EQ/ DRC/ HPF DAC HP Line-Out Ȉ Jack Port A EQ/ DRC/ HPF CLASS_D Amp Ȉ DAC Internal Port G Sense A Jack S/PDIF/GPIO DAC Port I Figure 1: CX20721 Block Diagram Conexant Confidential 05/26/15 010-21DSR03 6 CX20721 Data Sheet Pin Information Pin Information Pin Configuration The following figure shows the CX20721 pin configuration. Figure 2: CX20721 Pin Configuration Conexant Confidential 05/26/15 010-21DSR03 7 CX20721 Data Sheet Pin Information Pin Assignments The following table lists the CX20721 pin assignments. Table 1: Pin Assignments Pad Number Signal Name Pad Number Signal Name 1 DACDAT. I2S receive data and CODEC data input for playback. 22 CP_VPOS. Charge pump positive rail output—connect to the digital ground through a 2.2μF capacitor. 2 MCLK. I2S master clock input to the CODEC. 23 PORTA_L. Capless headphone output, left channel. 3 HDA_VDDIO—1.5V/1.8V/3.3V, ±5%. Sets the host interface signaling level. Connect to the same power supply as the host bus controller. 24 PORTA_RIGHT. Capless headphone output, right channel. 4 SCL. I2C serial clock input. 25 HGNDA. Microphone: • Ground terminal for CTIA-style headsets. • Bias for OMTP-style headsets. 5 SDA. I2C serial data input/output. 26 HGNDB. Microphone: • Ground terminal for Open Mobile Terminal Platform (OMTP) style headsets. • Bias for CTIA-style headsets. 6 MUSIC_REQ/SPDIF/GPIO0. Multi-function pin. 27 VREF_DAC. Analog Ground (AGND) reference—connect directly to AGND. 28 VREFP (Analog Reference). AGND reference—connect to AGND through a capacitor (typically 1μF). 29 AVDD5. 5V ±10%. LDO voltage supply input to the CODEC. MUSIC_REQ. Pull high by the external controller to enable D3 Live Mode. SPDIF. S/PDIF output. GPIO0. GPIO. 7 SPKR_ MUTE#/GPIO1. Multi-function pin. SPKR_MUTE. When pulled low, holds class-D on mute. Instead, Conexant recommends using a bi-directional EAPD pin. GPIO1. GPIO. 8 PORTC, DMIC DATA 1/GPIO3. Multifunction pin. DMIC DATA 1. An input to the CODEC—the digital MIC data from one or two DMICs. GPIO3. GPIO. 9 DVDD_IO. Sets the: • Digital I/O level. Connect to 1.8V/3.3V, ±5%. • Signaling level for the DMIC, S/PDIF, EAPD, and GPIO. 30 PORTD_A. • Headset microphone input. • Mono microphone input for CTIA-style headsets. 10 PORTC, DMIC_CLK 1/GPIO2. Multifunction pin. 31 PORTD_B. • Headset microphone input. • Mono microphone input for OMTP-style headsets. DMIC_CLK 1. Output from the CODEC—the digital MIC clock. GPIO2. GPIO. Conexant Confidential 05/26/15 010-21DSR03 8 CX20721 Data Sheet Pin Information Pad Number Signal Name Pad Number Signal Name 11 32 MICBIAS_B. Programmable micbias output for port B. Bi-directional EAPD. Bi-directional pin, Refer to the reference schematics for details. Output. Controls the external amplifiers’ power up/down per the HD Audio Specification. Input. Can be driven by EC or such to mute class-D and headphones. 12 PORTG, Class D LEFT +. Class-D amplifier output, left channel, positive. 33 PORTB_L. Microphone/line-in port, left channel. 13 PVDD5 LEFT, 5V ±10%. Class-D left power supply voltage. Connect to PVDD5 RIGHT, and connect both to system 5V. 34 PORTB_R. Microphone/line-in port, right channel. 14 PORTG, Class D LEFT -. Class-D amplifier output, left channel, negative. 35 JSENSE. Jack sense input. Connect to the resistor network per the HD Audio Specification. Refer to the reference schematic for details. 15 PORTG, Class D RIGHT -. Class-D amplifier output, right channel, negative. 36 PC BEEP. PC speaker beep input. Needs to be AC-coupled using a 0.1μF capacitor. Maximum input level is 1.8V. Use external attenuator if using a 3.3V signal to drive this pin. 16 PVDD5 RIGHT, +5V ±10%. Connect to PVDD5 LEFT, and connect both to system 5V. 37 LDO_AVDD. 1.8V to 1.6V LDO output. Connect to AGND through a capacitor. 17 PORTG, Class D RIGHT +. Class-D amplifier output, right channel, positive. 38 VDD18. 1.8V ±5%. Analog supply voltage input to the CODEC. 18 CP_AVDD18, 1.8V, ±5%. Charge pump supply input. 39 LDO_VDD_CORE. 1.2V LDO output. Connect to digital GND through a capacitor. 19 FLY_P, Flying Capacitor. Charge pump positive transfer charge—connect to FLY_N through a 2.2mF capacitor. 40 BCLK. I2S bit clock—CODEC input (slave) and CODEC output (master). 20 FLY_N, Flying Capacitor. Charge pump negative transfer charge—connect to FLY_P through a 2.2mF capacitor. 41 LRCLK. I2S left/right clock—CODEC input (slave) and CODEC output (master). 21 CP_VNEG. Charge pump negative rail output—connect to digital ground through a 2.2μF capacitor. 42 ADCDAT. I2S transmit data—CODEC data output for record. Conexant Confidential 05/26/15 010-21DSR03 9 CX20721 Data Sheet Device Performance Specifications Device Performance Specifications The following table details the analog performance. Table 2: Analog Performance Device Type Requirement Minimum Typical Maximum Frequency Range at 48kHz and Above THD+N @ –3dBFS - 90dBFS - [20Hz, 20kHz] Dynamic Range with Signal Present - 104dBFS Awt - [20Hz, 20kHz] - • ±0.25dB ripple (0.5dB [20Hz, 20kHz] peak-to-peak delta) 1dB at upper band edge 3dB at lower band edge Magnitude Response - • • Analog Line Output Jack Sampling Frequency Accuracy - - 0.02% - Line Output Crosstalk - 83dB - [20Hz, 15kHz] Full-scale Output Voltage - 1VRMS - - Noise Level During System Activity 95dBFS Awt - - - Inter-channel Phase Delay - - 30 degrees or 12.5μs, whichever is greater. [20Hz, 20kHz] THD+N @ –3dBFS (1W 4) - 78dB - [20Hz, 20kHz] Dynamic Range with Signal Present - 98dBFS Awt - [20Hz, 20kHz] - • ±0.25dB ripple (0.5dB [20Hz, 20kHz] peak-to-peak delta) 1dB at upper band edge 3dB at lower band edge Magnitude Response - Speaker Amplifier • • Sampling Frequency Accuracy - - 0.02% - Crosstalk - 86dB - [20Hz, 15kHz] Noise Level During System Activity 90dBFS Awt - - - Inter-channel Phase Delay - 30 degrees or 12.5μs, whichever is greater. [20Hz, 20kHz] - Conexant Confidential 05/26/15 010-21DSR03 10 CX20721 Data Sheet Device Performance Specifications Table 2: Analog Performance (Continued) Device Type Requirement Minimum Typical Maximum Frequency Range at 48kHz and Above THD+N @ –3dBFS/ 10k - 78dBFS - [100Hz, 20kHz] THD+N @ –3dBFS/ 32 - 91dBFS - [100Hz, 20kHz] THD+N @ –3dBFS/ 16 - 79dBFS - [100Hz, 20kHz] Dynamic Range with Signal Present, All Loads - 103dBFS Awt - [100Hz, 20kHz] - • ±0.25dB ripple (0.5dB [100Hz, 20kHz] peak-to-peak delta) 1dB at upper band edge 3dB at lower band edge Magnitude Response - Analog Headphone Out Jack • • Sampling Frequency Accuracy - - 0.02% - Headphone Output Crosstalk (at Jack) - 89dB - [100Hz, 15kHz] Full-scale Output Voltage, 10k Load - 1VRMS - (3) Full-scale Output Voltage, 32 Load - 820mVRMS - - Noise Level During 95dBFS Awt System Activity 300 - - Noise Level During System Activity 32 85dBFS Awt - - - Inter-channel Phase Delay - - 30 degrees or 12.5μs, whichever is greater. [100Hz, 20kHz] THD+N @ –3dBFS - 91dBFS - [20Hz, 20kHz] Dynamic Range with Signal Present - 99dBFS Awt - [20Hz, 20kHz] - • [20Hz, 20kHz] <= ±0.25dB ripple (0.5dB peak-to-peak delta) 1dB at upper band edge 3dB at lower band edge Magnitude Response Analog Line-In Jack • • Sampling Frequency Accuracy - - 0.02% - Full-scale Input Voltage 0.707VRMS - - - Conexant Confidential 05/26/15 010-21DSR03 11 CX20721 Data Sheet Power Consumption Table 2: Analog Performance (Continued) Device Type Requirement Minimum Typical Maximum Frequency Range at 48kHz and Above THD+N @ –3dBFS - 91dBFS - [100Hz, 20kHz] Dynamic Range with Signal Present - 99dBFS Awt - [100Hz, 20kHz] - • [100Hz, 20kHz] <= ±0.25dB ripple (0.5dB peak-to-peak delta) 1dB at upper band edge 3dB at lower band edge Magnitude Response Analog Microphone-In Jack • • Sampling Frequency Accuracy - - 0.02% - Full-scale Input Voltage (0dB Boost) 0.707VRMS - - - Power Consumption The following table lists the power consumption for the device. Table 3: Power Consumption Mode Power Non Active, Lowest Power State <275μW Headphone Playback into 32 Load (1mW) 27mW Conexant Confidential 05/26/15 010-21DSR03 12 CX20721 Data Sheet Package Dimensions Package Dimensions The following figure provides the CX20721 package diagram. Figure 3: Package Diagram Conexant Confidential 05/26/15 010-21DSR03 13 CX20721 Data Sheet Inter-Integrated Circuit (I2C) Interface Inter-Integrated Circuit (I2C) Interface The Inter-Integrated Circuit (I2C) interface uses a: • • 7-bit slave address to address multiple slave devices attached to the same interface. The slave address is static. 16-bit sub-address to access individual registers within the device. Per convention, the I2C sub-address is transmitted immediately after the I2C slave address only during write transfers. Data to be written to the addressed register(s) follows immediately after the sub-address. By convention, read transfers use the sub-address established by the most recent write transfer. As a result, a read transfer is typically preceded by a write transfer, which transmits only a sub-address value with no data values. The read transfer then follows immediately after the write transfer. The I2C interface supports clock speeds up to 400kHz, corresponding to the I2C fast mode. The I2C slave address is 33 hex. Conexant Confidential 05/26/15 010-21DSR03 14 CX20721 Data Sheet Ordering Information Ordering Information Table 4: Ordering Information Model/Order/Part Numbers AudioSmart Class-D Operating Temperature Device Order Number Audio CODEC Part Number CX20721-11Z CX20721 -11Z 42-QFN, 5x5 Yes 0 to 70°C CX21721-11Z CX21721 -11Z 42-QFN, 5x5 No 0 to 70°C Revision Audio CODEC Package Type Note: All devices are lead-free (Pb-free) and China Restriction of Hazardous Substances (RoHS) compliant , and are compatible with leaded re-flow processes. Contact the local Conexant sales office for advanced software options. www.conexant.com Headquarters: 1901 Main Street, Suite 300 Irvine, CA,92614 General Information: U.S. and Canada: 888-855-4562 | International: 1 + 949-483-3000 © 2015 Conexant Systems, Inc. Information in this document is provided in connection with Conexant Systems, Inc. (“Conexant”) products. These materials are provided by Conexant as a service to its customers and may be used for informational purposes only. Conexant assumes no responsibility for errors or omissions in these materials. Conexant may make changes to this document at any time, without notice. Conexant advises all customers to ensure that they have the latest version of this document and to verify, before placing orders, that information being relied on is current and complete. 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CONEXANT SHALL NOT BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING WITHOUT LIMITATION, LOST REVENUES OR LOST PROFITS, WHICH MAY RESULT FROM THE USE OF THESE MATERIALS. Conexant products are not intended for use in medical, lifesaving or life sustaining applications. Conexant customers using or selling Conexant products for use in such applications do so at their own risk and agree to fully indemnify Conexant for any damages resulting from such improper use or sale. The following are trademarks of Conexant Systems, Inc.: Conexant®, the Conexant "C" logo, SmartAudio, and SmartDAA®. Product names or services listed in this publication are for identification purposes only, and may be trademarks of third parties. Third-party brands and names are the property of their respective owners. For additional disclaimer information, consult Conexant’s Legal Information posted at www.conexant.com which is incorporated by reference. Reader Response: Conexant strives to produce quality documentation and welcomes your feedback. Please send comments and suggestions to [email protected]. For technical questions, contact your local Conexant sales office or field applications engineer. 05/26/15 010-21DSR03 15