MAX9856ETL+ Maxim Integrated Products, MAX9856ETL+ Datasheet
MAX9856ETL+
Specifications of MAX9856ETL+
Related parts for MAX9856ETL+
MAX9856ETL+ Summary of contents
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... ADCs and DACs Can Run at Independent Sample Rates ♦ Flexible Audio Mixing and Volume Control ♦ Clickless/Popless Operation ♦ Headset Detection Logic ♦ Control Interface PART MAX9856ETL+ + Denotes a lead-free/RoHS-compliant package Exposed pad. Applications AUXIN MUX LINEIN1 LINEIN2 SDOUT SDIN ...
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Low-Power Audio CODEC with DirectDrive Headphone Amplifiers ABSOLUTE MAXIMUM RATINGS (Voltages with respect to AGND.) AVDD, DVDD, DVDDS2, CPVDD .............................-0.3V to +4V PVSS, SVSS........................................Capacitor connection only AGND, DGND, CPGND.........................................-0.3V to +0.3V HPL, HPR ...................................(SVSS - 0.3V) to (AVDD + 0.3V) ...
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DirectDrive Headphone Amplifiers ELECTRICAL CHARACTERISTICS (continued AVDD CPVDD DVDDS2 DVDD C = 1µ +20dB, C NREG VPRE MICBIAS otherwise noted. Typical values are at T PARAMETER SYMBOL STEREO DAC (Note 3) ...
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Low-Power Audio CODEC with DirectDrive Headphone Amplifiers ELECTRICAL CHARACTERISTICS (continued AVDD CPVDD DVDDS2 DVDD C = 1µ +20dB, C NREG VPRE MICBIAS otherwise noted. Typical values are at T PARAMETER SYMBOL ...
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DirectDrive Headphone Amplifiers ELECTRICAL CHARACTERISTICS (continued AVDD CPVDD DVDDS2 DVDD C = 1µ +20dB, C NREG VPRE MICBIAS otherwise noted. Typical values are at T PARAMETER SYMBOL ADC/DAC DATA RATE ACCURACY ...
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Low-Power Audio CODEC with DirectDrive Headphone Amplifiers ELECTRICAL CHARACTERISTICS (continued AVDD CPVDD DVDDS2 DVDD C = 1µ +20dB, C NREG VPRE MICBIAS otherwise noted. Typical values are at T PARAMETER SYMBOL ...
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DirectDrive Headphone Amplifiers ELECTRICAL CHARACTERISTICS (continued AVDD CPVDD DVDDS2 DVDD C = 1µ +20dB, C NREG VPRE MICBIAS otherwise noted. Typical values are at T PARAMETER SYMBOL Total Harmonic Distortion Plus ...
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Low-Power Audio CODEC with DirectDrive Headphone Amplifiers ELECTRICAL CHARACTERISTICS (continued AVDD CPVDD DVDDS2 DVDD C = 1µ +20dB, C NREG VPRE MICBIAS otherwise noted. Typical values are at T PARAMETER SYMBOL ...
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DirectDrive Headphone Amplifiers ELECTRICAL CHARACTERISTICS (continued AVDD CPVDD DVDDS2 DVDD C = 1µ +20dB, C NREG VPRE MICBIAS otherwise noted. Typical values are at T PARAMETER SYMBOL SLEEP MODE (JDETEN = ...
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Low-Power Audio CODEC with DirectDrive Headphone Amplifiers DIGITAL INTERFACE ELECTRICAL CHARACTERISTICS (continued 1.8V DVDD DVDDS2 A MIN PARAMETER SYMBOL SDIN or LRCLK_A/D to BCLK Rising Setup Time SDIN or LRCLK_A/D to ...
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DirectDrive Headphone Amplifiers ( 1.8V, R AVDD CPVDD DVDDS2 DVDD =1µ +20dB 1µF, V AVPRE MICBIAS TOTAL HARMONIC DISTORTION PLUS NOISE vs. OUTPUT POWER (DAC TO HP) 100 HP ...
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Low-Power Audio CODEC with DirectDrive Headphone Amplifiers ( 1.8V, R AVDD CPVDD DVDDS2 DVDD =1µ +20dB 1µF, V AVPRE MICBIAS POWER-SUPPLY REJECTION RATIO vs. FREQUENCY (DAC TO HP) 0 ...
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DirectDrive Headphone Amplifiers ( 1.8V, R AVDD CPVDD DVDDS2 DVDD =1µ +20dB 1µF, V AVPRE MICBIAS FFT, LINE IN TO ADC (48kHz) SYNCHRONOUS MASTER MODE (-60dBFS) 20 MCLK = ...
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Low-Power Audio CODEC with DirectDrive Headphone Amplifiers ( 1.8V, R AVDD CPVDD DVDDS2 DVDD =1µ +20dB 1µF, V AVPRE MICBIAS ADC DIGITAL FILTER FREQUENCY RESPONSE ...
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DirectDrive Headphone Amplifiers PIN NAME 1 LINEIN1 Line 1 Input. AC-couple signal to LINEIN1 with a 1µF capacitor. 2 LINEIN2 Line 2 Input. AC-couple signal to LINEIN2 with a 1µF capacitor. 3 AUXIN Auxiliary Input. Input for beep and sound ...
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Low-Power Audio CODEC with DirectDrive Headphone Amplifiers PIN NAME Digital Audio Bit Clock Input/Output. BCLK is an input when the MAX9856 is in slave mode and an output 25 BCLK when in master mode. 26 SDOUT Digital Audio Serial Data ...
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DirectDrive Headphone Amplifiers 1.71V TO 3.6V 4.7μ AVDD CPVDD -32dB TO +30dB 1μF 1 PGA LINEIN1 -32dB TO +30dB 1μF 2 PGA LINEIN2 -32dB TO +30dB 1μF 3 PGA AUXIN 29 LRCLK_A 24 LRCLK_D 25 DIGITAL AUDIO BCLK ...
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Low-Power Audio CODEC with DirectDrive Headphone Amplifiers Detailed Description The MAX9856 is a high-performance, low-power stereo audio CODEC designed to provide a complete audio solution. Operating from a 1.8V supply, the MAX9856 achieves high performance and reasonable output power while ...
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DirectDrive Headphone Amplifiers Table 1. Register Map REGISTER B7 B6 Status CLD SLD Status LSNS JKSNS Interrupt Enable ICLD ISLD CLOCK CONTROL Clock Rates 0 DAC INTERFACE System DWCI DBCI Interface DPLLEN Interface ADC INTERFACE System AWCI ABCI Interface APLLEN ...
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Low-Power Audio CODEC with DirectDrive Headphone Amplifiers Status Registers Status registers 0x00 and 0x01 are read-only registers that report the status of various device functions. The status register bits are cleared upon a read operation of Table 2. Status Registers ...
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DirectDrive Headphone Amplifiers Interrupt Enables Hardware interrupts are reported on the open-drain IRQ pin. When an interrupt occurs, IRQ remains low until the interrupt is serviced by reading status register 0x00 flag is set reported as ...
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Low-Power Audio CODEC with DirectDrive Headphone Amplifiers The MAX9856 DAC is capable of supporting any sam- ple rate from 8kHz to 96kHz in either master or slave mode, including all common sample rates (8kHz, 11.025kHz, 12kHz, 16kHz, 22.05kHz, 24kHz, 32kHz, ...
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DirectDrive Headphone Amplifiers DAC Interface Register Bit Descriptions (continued) REGISTER PCM Mode Select. PCM determines the format of the LRCLK_D and LRCLK_A signal: 0—The LRCLK_D and LRCLK_A signals have a 50% duty cycle. Left-channel audio is transmitted during one state ...
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Low-Power Audio CODEC with DirectDrive Headphone Amplifiers DIGITAL AUDIO INTERFACE SLAVE MODES: (LRCLK SHOULD TRANSITION ON THE UNUSED BCLK EDGE) DWCI/AWCI = 0, DBCI/ABCI = 0, DDLY/ADLY = PCM = 0 LEFT D15 D14 D13 D12 ...
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DirectDrive Headphone Amplifiers DAI STEREO SERIAL INTERFACE TIMING DIAGRAM (SLAVE MODE) SDIN/LRCLK (INPUTS BCLK (BCI = 0, INPUT) BCLK (BCI = 1, INPUT DLY SDOUT (OUTPUT) Figure 2. Digital Audio Interface ...
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Low-Power Audio CODEC with DirectDrive Headphone Amplifiers ADC Interface Register Bit Description (continued) REGISTER LRCLK_A/GPIO Configuration General-purpose input 01 = Word clock for the ADC 10 = General-purpose output—low APIN 11 = General-purpose output—high When APIN ≠ 01, ...
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DirectDrive Headphone Amplifiers ADC Interface Register Bit Description (continued) REGISTER ADC Noise Gate Threshold. The MAX9856 features a noise gate that reduces the audible noise at low signal levels. The noise gate attenuates the output at a rate of 1dB ...
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Low-Power Audio CODEC with DirectDrive Headphone Amplifiers Table 9. Digital Highpass Filter Cutoff Frequencies LRCLK (kHz) 000 001 (Hz) 8 Off 5 11.025 Off 7 12 Off 8 16 Off 10 22.05 Off 14 24 Off 15 32 Off 20 ...
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DirectDrive Headphone Amplifiers AGC Register Bit Description (continued) BITS AGC Attack Time. The attack time is the time it takes to reduce the gain after the input signal has exceeded the threshold level. The gain attenuation during attack is exponential ...
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Low-Power Audio CODEC with DirectDrive Headphone Amplifiers The MAX9856 has two main analog mixers. The first feeds signals into the headphone and line output amplifiers while the second supplies the ADC input. Table 11. Audio Mixer Control Registers REG B7 ...
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DirectDrive Headphone Amplifiers The MAX9856 features various analog inputs. All inputs have independent gain control for maximum flexibility. AUXIN is a mono auxiliary input that can be used for mixing alarms, beeps, and sound effects into the head- phone outputs ...
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Low-Power Audio CODEC with DirectDrive Headphone Amplifiers Audio Input Register Bit Description BITS Programmable Gain Adjust for Digital Audio Input SETTING 0x00 0x07 0x0E 0x15 0x1C 0x22 0x29 0x2F 0x35 0x3A 0x40 0x45 0x4A 0x50 PGADS 0x55 0x59 0x5E 0x63 ...
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DirectDrive Headphone Amplifiers Audio Input Register Bit Description (continued) BITS Programmable Gain Adjust for Line Inputs SETTING 0x00 0x01 0x02 0x03 0x04 0x05 PGAAUX/ PGAL1/ 0x06 PGAL2 0x07 0x08 0x09 0x0A 0x0B 0x0C 0x0D 0x0E 0x0F ______________________________________________________________________________________ Low-Power Audio CODEC ...
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Low-Power Audio CODEC with DirectDrive Headphone Amplifiers Audio Input Register Bit Description (continued) BITS Left/Right Programmable Gain Adjustment for Microphone Inputs. When AGC is enabled, the PGAML and PGAMR bits cannot be manually programmed. The PGAML register can be monitored ...
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DirectDrive Headphone Amplifiers The MAX9856 features stereo headphone amplifiers and line output amplifiers with DirectDrive technology. DirectDrive eliminates the need for bulky and expensive DC-blocking capacitors on the outputs. The DirectDrive biasing scheme is illustrated in Figure 4. The head- ...
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Low-Power Audio CODEC with DirectDrive Headphone Amplifiers Table 13. Audio Output Control Registers REGISTER B7 B6 0x18 0 HPMUTE 0x19 0 0x1A 0 VSEN Audio Output Register Bit Description BITS HPMUTE Headphone Mute Enable Headphone Volume Control SETTING 0x00 0x01 ...
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DirectDrive Headphone Amplifiers Headset Detection The MAX9856 features headset detection that can detect the insertion and removal of a jack as well as the load type. When a jack is detected, an interrupt on IRQ can be triggered to alert ...
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Low-Power Audio CODEC with DirectDrive Headphone Amplifiers Table 14. Headset Detect Control Register REG B7 B6 0x1B 0 Table 15. Impedance Detection Routine TIME t Disable the headphone amplifiers. Set EN = 111 to enable the detection circuitry. 0 IRQ ...
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DirectDrive Headphone Amplifiers Power Management and Control The MAX9856 has comprehensive power management that allows unused features to be disabled, thereby Table 16. Power-Management Register REGISTER B7 B6 SHDN 0x1C Power-Management Register Bit Description BITS SHDN Shutdown. Overrides all settings ...
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Low-Power Audio CODEC with DirectDrive Headphone Amplifiers One data bit is transferred during each SCL cycle. The data on SDA must remain stable during the high period of the SCL pulse. Changes in SDA while SCL is high are control ...
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DirectDrive Headphone Amplifiers Write Data Format A write to the MAX9856 includes transmission of a START condition, the slave address with the R/W bit set byte of data to configure the internal register address pointer ...
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Low-Power Audio CODEC with DirectDrive Headphone Amplifiers Read Data Format Send the slave address with the R/W bit set initi- ate a read operation. The MAX9856 acknowledges receipt of its slave address by pulling SDA low during ...
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DirectDrive Headphone Amplifiers PCB Layout and Bypassing Proper layout and grounding are essential for optimum performance. Use large traces for the power-supply inputs and amplifier outputs to minimize losses due to parasitic trace resistance. Proper grounding improves audio performance, minimizes ...
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Low-Power Audio CODEC with DirectDrive Headphone Amplifiers For the latest package outline information and land patterns www.maxim-ic.com/packages. 44 ______________________________________________________________________________________ Package Information ...
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DirectDrive Headphone Amplifiers For the latest package outline information and land patterns www.maxim-ic.com/packages. PACKAGE TYPE PACKAGE CODE 40 TDFN-EP T4066-5 ______________________________________________________________________________________ Low-Power Audio CODEC with Package Information (continued) DOCUMENT NO. 21-0141 45 ...
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... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 46 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2008 Maxim Integrated Products ...