max9796 Maxim Integrated Products, Inc., max9796 Datasheet
max9796
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max9796 Summary of contents
Page 1
... DirectDrive headphone amplifier. Maxim’s 3rd-generation, ultra-low EMI, Class D audio power amplifiers provide Class AB performance with Class D efficiency. The MAX9796 delivers 2.3W into a 4Ω load from a 5V supply and offers efficiencies up to 80%. Active emissions limiting circuitry and spread-spectrum modulation greatly reduce EMI, eliminating the need for output filtering found in traditional Class D devices ...
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High-Power Class D Audio Subsystem with DirectDrive Headphone Amplifiers ABSOLUTE MAXIMUM RATINGS V to GND ...........................................................................+ PGND .......................................................................+6V DD CPV to CPGND..................................................................+6V DD CPV to CPGND .....................................................-6V to +0. CPGND..........................................................-6V to +0.3V SS ...
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High-Power Class D Audio Subsystem with DirectDrive Headphone Amplifiers ELECTRICAL CHARACTERISTICS (continued) = 3.3V, GND = PGND = CPGND = 0V, SHDN = CPV 0dB, volume setting = 0dB, mono path ...
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High-Power Class D Audio Subsystem with DirectDrive Headphone Amplifiers ELECTRICAL CHARACTERISTICS (continued) = 3.3V, GND = PGND = CPGND = 0V, SHDN = CPV 0dB, volume setting = 0dB, mono path ...
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High-Power Class D Audio Subsystem with DirectDrive Headphone Amplifiers ELECTRICAL CHARACTERISTICS (continued) = 3.3V, GND = PGND = CPGND = 0V, SHDN = CPV 0dB, volume setting = 0dB, mono path ...
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High-Power Class D Audio Subsystem with DirectDrive Headphone Amplifiers ELECTRICAL CHARACTERISTICS (continued) = 3.3V, GND = PGND = CPGND = 0V, SHDN = CPV 0dB, volume setting = 0dB, mono path ...
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High-Power Class D Audio Subsystem with DirectDrive Headphone Amplifiers = 3.3V, GND = PGND = CPGND = 0V, SHDN = CPV 0dB, volume setting = 0dB, mono path gain = 0dB, ...
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High-Power Class D Audio Subsystem with DirectDrive Headphone Amplifiers = 3.3V, GND = PGND = CPGND = 0V, SHDN = CPV 0dB, volume setting = 0dB, mono path gain = 0dB, ...
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... FIXED-FREQUENCY MODE 20 0 -20 -40 -60 -80 -100 8Ω -120 L INPUTS AC GROUNDED -140 0 100 1000 FREQUENCY (MHz) TURN-OFF RESPONSE MAX9796 toc24 10ms/div TOTAL HARMONIC DISTORTION PLUS NOISE vs. FREQUENCY 32Ω 20mW OUT 0. 40mW OUT 0.001 10 100 1k 10k ...
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High-Power Class D Audio Subsystem with DirectDrive Headphone Amplifiers = 3.3V, GND = PGND = CPGND = 0V, SHDN = CPV 0dB, volume setting = 0dB, mono path gain = 0dB, ...
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High-Power Class D Audio Subsystem with DirectDrive Headphone Amplifiers = 3.3V, GND = PGND = CPGND = 0V, SHDN = CPV 0dB, volume setting = 0dB, mono path gain = 0dB, ...
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High-Power Class D Audio Subsystem with DirectDrive Headphone Amplifiers BUMP NAME A1 CPV Charge-Pump Power Supply DD A2 C1P Charge-Pump Flying Capacitor Positive Terminal A3 CPGND Charge-Pump GND A4 C1N Charge-Pump Flying Capacitor Negative Terminal A5 CPV Charge-Pump Output. ...
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... RIGHT VOLUME LEFT OUTPUT VOLUME MIXER INPUT MIXER MONO VOLUME C CONTROL GND PGND PGND Typical Application Circuit V DD 0.1μF 1μ F1, B1, F5 DirectDrive A6 HPL 3dB B6 HPR 3dB C6 OUTRx 3dB 12dB C1, F4 OUT+ CLASS D E1, F2 OUT- AMPLIFIER MAX9796 13 ...
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... The MAX9796 can also be configured as a single-ended input amplifier without performance degradation. The MAX9796 features three fully differential input pairs (INA_, INB_, INC_) that can be configured as stereo single-ended or mono differential inputs. I control for input configuration, volume level, and mixer configuration ...
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... Wideband Output Spectrum Fixed-Frequency Mode graph in the Typical Operating Characteristics ). Spread-Spectrum Modulation The MAX9796 features a unique, patented spread- spectrum modulation that flattens the wideband spec- tral components. Proprietary techniques ensure that the V IN- ...
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... FREQUENCY (MHz) consumption, especially when idling. When no signal is present at the input of the MAX9796, the outputs switch as shown in Figure 4. Because the MAX9796 drives the speaker differentially, the two outputs cancel each other, resulting in no net idle mode voltage across the speaker, minimizing power consumption ...
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... C2 (see the Typical Application Circuit ). The charge pump is active in both speaker and headphone modes. The audio inputs of the MAX9796 (INA, INB, and INC) are preamplified and then mixed by the input mixer to create three internal signals: left (L), right (R), and mono (M) ...
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... In most applications, the output of the preamplifier dri- ving the MAX9796 has a DC bias of typically half the supply. During startup, the input-coupling capacitor is charged to the preamplifier’s DC bias voltage, resulting shift across the capacitor and an audible click- and-pop ...
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... REPEATED START (Sr) condition and a STOP (P) con- dition. Each word transmitted over the bus is 8 bits long and is always followed by an acknowledge clock pulse. The MAX9796 SDA line operates as both an input and an open-drain output. A pullup resistor, greater than 500Ω, is required on the SDA bus. The MAX9796 SCL line operates as an input only. A pullup resistor, greater than 500Ω ...
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... The MAX9796 only accepts write data, but it acknowl- edges the receipt of the address byte with the R/W bit set high. The MAX9796 does not write to the SDA bus in the event that the R/W bit is set high. Subsequently, the master reads all 1’s from the MAX9796. Always set the R/W bit to zero to avoid this situation ...
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... Output Mode (100) 01000 Global Control Register (101) 00011 The MAX9796 has three flexible inputs that can be con- figured as single-ended stereo inputs or differential mono inputs. All input signals are summed into three unique signals, Left (L), Right (R), and Mono (M), which are routed to the output amplifiers. The bit B4 allows the option of boosting low-level signals on INA ...
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... Mono/Left/Right Volume Control The MAX9796 has separate volume control for each of the internal signals: left (L), right (R), and mono (M). The final gain of each signal is determined by the way the Table 6. Mono/Left/Right Volume Control Registers Mono Volume Control Left Volume Control Right Volume Control Table 7 ...
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... No additional gain is applied to the Internal Mono (M) signal path. The MAX9796 has four output amplifiers: a mono receiver amplifier, a stereo DirectDrive headphone amplifier, and one mono Class D amplifier Mono+6dB to the various outputs. RECEIVER ...
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... DD(P-P) Any parasitic resistance in the filter components results in a loss of power, lowering the efficiency. The MAX9796 does not require an output filter. The device relies on the inherent inductance of the speaker coil and the natural filtering of both the speaker and the human ear to recover the audio component of the square-wave output ...
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... DC-Coupled Input 20Hz to 20kHz response, saving both board space and cost due to the use of smaller capacitors. The MAX9796 does not require a Class D output filter. The device passes EN55022B emissions standards with 152mm of unshielded speaker cables. However, output filtering can be used if a design is failing radiat- ...
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... High output trace resistance decreases the power delivered to the load. Large output, supply, and GND traces allow more heat to move from the MAX9796 to the PCB, decreasing the thermal impedance of the circuit. UCSP Applications Information ...
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High-Power Class D Audio Subsystem with DirectDrive Headphone Amplifiers (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 PACKAGE OUTLINE, 6x6 UCSP ...
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... Maxim reserves the right to change the circuitry and specifications without notice at any time. 28 ____________________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. Revision History PAGES CHANGED — ...