MAX97220EETE+T

The MAX97220EETE+T is a differential input DirectDrive line driver/headphone amplifier in 16 pin TQFN package. DirectDrive outputs eliminate DC blocking capacitors. This device is capable of driving line level loads with 3VRMS into 1Kohm with a 5V supply and 2VRMS into 600 ohm loads from a 3.3V supply. A headphone load is capable of being driven with 125mW into 32ohm with a 5V supply. It is offered with an externally set gain through external resistors. The external gain setting nodes can also be used to configure filters for set-top box applications. The IC has exceptional THD+N over the full audio bandwidth. It is used for headphone applications with tON of 5.5ms. An on-chip charge pump inverts the power supply input, creating a negative rail. The output stage of the amplifier is powered between the positive input supply and the output of the charge pump. The bipolar supplies bias output about ground, eliminating the need for large, distortion-introducing output coupling capacitors.

• Supply voltage range is 2.5V to 5.5V
• Operating temperature range from -40°C to 85°C
• Footprint compatible with MAX9722 device
• Externally adjustable gain with no clicks or pops
• Crosstalk of -125dB at f = 1KHz and oscillator frequency of 500KHz
• Flat THD+N better than 90dB in the audio band
• 18bit SNR performance of 112dB and output noise voltage of 7µV
• PSRR of 90dB (VPVDD = VSVDD_ = 2.5V to 5.5V) and CMRR of 86dB (-VPVDD/2 P VCM P + VPVDD/2)
• Quiescent supply current of 5mA (no load) and shutdown supply current of 1µA at TA = 25°C
• Output signal attenuation of 76dB in shutdown and output offset voltage of 350µV

Aplicaţii

Signal Processing, Portable Devices, Multimedia, Consumer Electronics

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