The MAX9850ETI+T is a stereo audio DAC with DirectDrive headphone amplifier in 28 pin TQFN package. This low power, high performance stereo audio DAC is designed to meet the board space and performance requirements of battery operated devices. The MAX9850 uses Maxim"s DirectDrive headphone technology that produces ground biased analogue audio output from single supply which allows for driving headphones directly from amplifier outputs without large DC blocking capacitors. This feature saves board space, provides higher click/pop suppression and improves low frequency (bass) response. The architecture does not require headphone jack to be biased to DC voltage and thus allows for a conventional, grounded chassis design. The flexible clocking circuitry of MAX9850 utilizes any available system clock up to 40MHz by eliminating need for an external PLL and multiple crystal oscillators.
● Analogue Supply voltage range from 1.8V to 3.6V
● Operating temperature range from -40°C to 85°C
● 30mW stereo headphone output power with 1.8V supply
● 91dB PSRR at f = 1KHz (headphone outputs)
● Flexible I2S compatible digital audio interface, I2C headphone volume and mute control
● 2-wire (I2C) compatible control interface, stereo line inputs and outputs
● Total harmonic distortion plus noise of 87dB at 0dBFS and -27.5dB at -60dBFS (fIN = 984.375Hz)
● Analogue supply current of 5.5mA at AVDD = 1.8V and digital supply current of 2.1mA at DVDD = 1.8V
● Analogue shutdown current of 1.5µA and digital shutdown current of 0.3µA
● Sampling frequency range from 8KHz to 48KHz and crosstalk of -105dB
