MAX9770, MAX9772 1.2W Low-EMI, Filterless, Mono Class D Amplifier With Stereo DirectDrive Headphone Amplifiers

The MAX9770 MAX9772 combine a mono, filterless, Class D speaker Amplifier and stereo DirectDrive" Headphone Amplifiers in a single device. The MAX9770 MAX9772 operate from a single 2.5V to 5.5V supply and include features that reduce external component count, system cost, board space, and offer improved Audio reproduction.
The speaker Amplifiers make use of Maxim's patented Class D architecture, providing Class AB performance with Class D efficiency, conserving board space, and extending battery life. The speaker Amplifiers deliver 1.2W into an 8 load while offering efficiencies above 85%. A spread-spectrum modulation scheme reduces radiated emissions caused by the modulation frequency. Furthermore, the MAX9770 MAX9772 Oscillators CAN be synchronized to an external Clock through the SYNC input, avoiding possible problem frequencies inside a system. The speaker Amplifier features THD+N as low as 0.025%, high 70dB PSRR, and SNR in excess of 90dB.
The Headphone Amplifiers feature Maxim's patented DirectDrive architecture that produces a ground-referenced output from a single supply, eliminating the need for large DC-blocking capacitors. The Headphone Amplifiers deliver up to 80mW into a 16 load, feature low 0.015% THD+N, high 85dB PSRR, and 8kV ESD-protected outputs. A Headphone sense input detects the presence of a Headphone and automatically configures the Amplifiers for either speaker or Headphone mode.
The MAX9770 MAX9772 include internally set, logic-selectable gain, and a comprehensive input multiplexer/mixer, allowing multiple Audio sources to be selected and for true mono reproduction of a stereo source in speaker mode. Industry-leading click-and-pop suppression eliminates audible transients during power and shutdown cycles. A low-power shutdown mode decreases supply current consumption to 0.1A, further extending battery life.
The MAX9770 is offered in space-saving, thermally efficient 28-pin TQFN (5mm x 5mm x 0.8mm) and 28-pin TSSOP packages, while the MAX9772 is offered in a tiny (2.54mm x 2.54mm x 0.62mm) 25-bump chip-scale package (UCSP"). The MAX9770 MAX9772 feature thermal-overload and output short-circuit protection, and are specified over the extended -40C to +85C temperature range.
By Maxim Integrated Products
Part Manufacturer Description Datasheet Samples
MAX9770EVKIT Maxim Integrated Products Evaluation Kit for the MAX9770, MAX9771
MAX9770ETI Maxim Integrated Products Audio Amplifier, 1.2W, 2 Channel(s), 1 Func, BICMOS, 5 X 5 MM, 0.80 MM HEIGHT, QFN-28
MAX9770ETI-T Maxim Integrated Products Audio Amplifier, 1.2W, 2 Channel(s), 1 Func, BICMOS, 5 X 5 MM, 0.80 MM HEIGHT, QFN-28
MAX9770EUI Maxim Integrated Products Audio Amplifier, 1.2W, 2 Channel(s), 1 Func, BICMOS, PDSO28, 4.40 MM, MO-153AE, TSSOP-28
MAX9770ETI+ Maxim Integrated Products Audio Amplifier, 1.2W, 2 Channel(s), 1 Func, BICMOS, 5 X 5 MM, 0.80 MM HEIGHT, LEAD FREE, MO-220WHHD-1, TQFN-28
MAX9770ETI+T Maxim Integrated Products Audio Amplifier, 1.2W, 2 Channel(s), 1 Func, BICMOS, 5 X 5 MM, 0.80 MM HEIGHT, QFN-28
MAX9770EUI+ Maxim Integrated Products Audio Amplifier, 1.2W, 2 Channel(s), 1 Func, BICMOS, PDSO28, 4.40 MM, TSSOP-28
MAX9770EUI+T Maxim Integrated Products Audio Amplifier, 1.2W, 2 Channel(s), 1 Func, BICMOS, PDSO28, 4.40 MM, TSSOP-28
MAX9770 's PackagesMAX9770 's pdf datasheet
MAX9770ETI QFN
MAX9770ETIT QFN
MAX9770EUI TSSOP
MAX9770EUIT TSSOP




MAX9770 Pinout, Pinouts
MAX9770 pinout,Pin out
This is one package pinout of MAX9770,If you need more pinouts please download MAX9770's pdf datasheet.

MAX9770 Application circuits
MAX9770 circuits
This is one application circuit of MAX9770,If you need more circuits,please download MAX9770's pdf datasheet.


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