MAX9775EBX+G45 Maxim Integrated Products, MAX9775EBX+G45 Datasheet
MAX9775EBX+G45
Related parts for MAX9775EBX+G45
MAX9775EBX+G45 Summary of contents
Page 1
... MUX INTERFACE MAX9775 ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. ♦ Unique Spread-Spectrum Modulation and Active Emissions Limiting Significantly Reduces EMI ♦ 3D Stereo Enhancement (MAX9775 Only) ♦ ...
Page 2
Stereo Class D Audio Subsystem with DirectDrive Headphone Amplifier ABSOLUTE MAXIMUM RATINGS V to GND.............................................................................. PGND .........................................................................6V DD CPV to CPGND ....................................................................6V DD CPV to CPGND .....................................................-6V to +0. CPGND..........................................................-6V to ...
Page 3
Stereo Class D Audio Subsystem with DirectDrive Headphone Amplifier ELECTRICAL CHARACTERISTICS (continued CPV = 3.3V GND 0dB, volume setting = 0dB, mono path gain = 0dB, SHDN ...
Page 4
Stereo Class D Audio Subsystem with DirectDrive Headphone Amplifier ELECTRICAL CHARACTERISTICS (continued CPV = 3.3V GND 0dB, volume setting = 0dB, mono path gain = 0dB, SHDN ...
Page 5
Stereo Class D Audio Subsystem with DirectDrive Headphone Amplifier ELECTRICAL CHARACTERISTICS (continued CPV = 3.3V GND 0dB, volume setting = 0dB, mono path gain = 0dB, SHDN ...
Page 6
Stereo Class D Audio Subsystem with DirectDrive Headphone Amplifier ELECTRICAL CHARACTERISTICS (continued CPV = 3.3V GND 0dB, volume setting = 0dB, mono path gain = 0dB, SHDN ...
Page 7
Stereo Class D Audio Subsystem with DirectDrive Headphone Amplifier = 3.3V, GND = PGND = CPGND = 0V, SHDN = CPV INC gain = 0dB, volume setting = 0dB, ...
Page 8
Stereo Class D Audio Subsystem with DirectDrive Headphone Amplifier = 3.3V, GND = PGND = CPGND = 0V, SHDN = CPV INC gain = 0dB, volume setting = 0dB, ...
Page 9
Stereo Class D Audio Subsystem with DirectDrive Headphone Amplifier = 3.3V, GND = PGND = CPGND = 0V, SHDN = CPV INC gain = 0dB, volume setting = 0dB, ...
Page 10
Stereo Class D Audio Subsystem with DirectDrive Headphone Amplifier = 3.3V, GND = PGND = CPGND = 0V, SHDN = CPV INC gain = 0dB, volume setting = 0dB, ...
Page 11
Stereo Class D Audio Subsystem with DirectDrive Headphone Amplifier = 3.3V, GND = PGND = CPGND = 0V, SHDN = CPV INC gain = 0dB, volume setting = 0dB, ...
Page 12
Stereo Class D Audio Subsystem with DirectDrive Headphone Amplifier = 3.3V, GND = PGND = CPGND = 0V, SHDN = CPV INC gain = 0dB, volume setting = 0dB, ...
Page 13
Stereo Class D Audio Subsystem with DirectDrive Headphone Amplifier = 3.3V, GND = PGND = CPGND = 0V, SHDN = CPV INC gain = 0dB, volume setting = 0dB, ...
Page 14
Stereo Class D Audio Subsystem with DirectDrive Headphone Amplifier = 3.3V, GND = PGND = CPGND = 0V, SHDN = CPV INC gain = 0dB, volume setting = 0dB, ...
Page 15
Stereo Class D Audio Subsystem with DirectDrive Headphone Amplifier PIN NAME F1 PV Class D Power Supply DD E1 OUTL- Negative Left-Speaker Output D2 SCL Serial Clock Input. Connect a 1kΩ pullup resistor from SCL to V ...
Page 16
Stereo Class D Audio Subsystem with DirectDrive Headphone Amplifier PIN NAME TQFN UCSP Class D Power Supply OUT- Negative Left-Speaker Output 3 D2 SCL Serial Clock Input. Connect a 1kΩ pullup ...
Page 17
Stereo Class D Audio Subsystem with DirectDrive Headphone Amplifier CPV SS 15 (A5) 17 (B5) C1N 13 (A4) CPGND 12 (A3) C1 10kΩ CHARGE 1μF PUMP C1P 10 (A2 CPV 9 (A1 1μF ...
Page 18
Stereo Class D Audio Subsystem with DirectDrive Headphone Amplifier CPV 15 (A5) 17 (B5) C1N 13 (A4) CPGND 12 (A3) C1 10kΩ CHARGE 1μF PUMP C1P 10 (A2 CPV 9 (A1 1μF 1μF ...
Page 19
Stereo Class D Audio Subsystem with DirectDrive Headphone Amplifier Detailed Description The MAX9775/MAX9776 ultra-low-EMI, filterless, Class D audio power amplifiers feature several improvements to switch-mode amplifier technology. The MAX9775/ MAX9776 feature active emissions limiting circuitry to reduce ...
Page 20
Stereo Class D Audio Subsystem with DirectDrive Headphone Amplifier Operating Modes Fixed-Frequency Modulation The MAX9775/MAX9776 feature a fixed-frequency modulation mode with a 1.1MHz switching frequency, 2 set through the I C interface (Table 2). In fixed-frequen- cy ...
Page 21
Stereo Class D Audio Subsystem with DirectDrive Headphone Amplifier 40.0 35.0 EN55022B LIMIT 30.0 25.0 20.0 15.0 10.0 5.0 30.0 60.0 80.0 100.0 Figure 3. EMI with 76mm of Speaker Cable ______________________________________________________________________________________ 120.0 140.0 160.0 180.0 200.0 ...
Page 22
Stereo Class D Audio Subsystem with DirectDrive Headphone Amplifier Filterless Modulation/Common-Mode Idle The MAX9775/MAX9776 use Maxim’s unique, patented modulation scheme that eliminates the LC filter required by traditional Class D amplifiers, improving efficiency, reducing component count, conserving ...
Page 23
Stereo Class D Audio Subsystem with DirectDrive Headphone Amplifier V OUT CONVENTIONAL DRIVER-BIASING SCHEME V OUT DirectDrive BIASING SCHEME Figure 5. Traditional Amplifier Output vs. MAX9775/MAX9776 DirectDrive Output The MAX9775/MAX9776 feature a low-noise charge pump. The switching ...
Page 24
Stereo Class D Audio Subsystem with DirectDrive Headphone Amplifier if the right and left volume controls are set for a maxi- mum gain 0dB (11111 in Table 7, IN+6dB = 0 from Table 10) before the 3D ...
Page 25
Stereo Class D Audio Subsystem with DirectDrive Headphone Amplifier Click-and-Pop Suppression In conventional single-supply headphone amplifiers, the output-coupling capacitor is a major contributor of audi- ble clicks and pops. Upon startup, the amplifier charges the coupling capacitor ...
Page 26
Stereo Class D Audio Subsystem with DirectDrive Headphone Amplifier 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 ...
Page 27
Stereo Class D Audio Subsystem with DirectDrive Headphone Amplifier COMMAND BYTE IS STORED RECEIPT OF STOP CONDITION ACKNOWLEDGE FROM MAX9775/MAX9776 S SLAVE ADDRESS 0 ACK COMMAND BYTE R/W FROM MAX9775/MAX9776 ...
Page 28
Stereo Class D Audio Subsystem with DirectDrive Headphone Amplifier Table 4. Input Mode Control Register REGISTER Input Mode Control The MAX9775/MAX9776 have three flexible inputs that can be configured as single-ended stereo inputs or dif- ferential mono ...
Page 29
Stereo Class D Audio Subsystem with DirectDrive Headphone Amplifier Table 6. Mono/Left/Right Volume Control Registers REGISTER Mono Volume Control Left Volume Control Right Volume Control The MAX9775/MAX9776 have separate volume controls for each of the internal signals: ...
Page 30
Stereo Class D Audio Subsystem with DirectDrive Headphone Amplifier Table 8. Output Mode Control Register REGISTER Output Mode Control MONO+6dB in the Output Mode Control register allows an extra 6dB of gain on the internal mono signal: ...
Page 31
Stereo Class D Audio Subsystem with DirectDrive Headphone Amplifier Table 10. Global Control Register REGISTER Global Control Register The Global Control Register is used for global configu- rations, those affecting all inputs and outputs. The bits Table ...
Page 32
Stereo Class D Audio Subsystem with DirectDrive Headphone Amplifier The MAX9775/MAX9776 can be configured as a single- ended input amplifier by appropriately configuring the Input Control Register (see Tables 5a and 5b). The input amplifier can accept ...
Page 33
Stereo Class D Audio Subsystem with DirectDrive Headphone Amplifier Charge-Pump Capacitor Selection Use capacitors with an ESR less than 100mΩ for opti- mum performance. Low-ESR ceramic capacitors mini- mize the output resistance of the charge pump. Most ...
Page 34
Stereo Class D Audio Subsystem with DirectDrive Headphone Amplifier TOP VIEW (BUMPS ON BOTTOM CPV C1P CPGND C1N DD A CL_L CL_H VBIAS INC1 B OUTL+ SDA C MAX9775 PGND SCL D OUTL- ...
Page 35
Stereo Class D Audio Subsystem with DirectDrive Headphone Amplifier (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.) ______________________________________________________________________________________ Package Information 35 ...
Page 36
Stereo Class D Audio Subsystem with DirectDrive Headphone Amplifier (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.) 36 ______________________________________________________________________________________ Package Information (continued) ...
Page 37
Stereo Class D Audio Subsystem with DirectDrive Headphone Amplifier (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.) PACKAGE TYPE PACKAGE CODE 36 ...
Page 38
... 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. 38 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2008 Maxim Integrated Products DESCRIPTION is a registered trademark of Maxim Integrated Products, Inc ...