MAX97220E Datasheet | Maxim Integrated

EVALUATION KIT AVAILABLE MAX97220A- MAX97220E Differential Input Direct Drive Line Drivers/Headphone Amplifiers General Description The MAX97220_ is a differential input Direct Drive® line driver/headphone amplifier. This device is capable of driving line level loads with 3VRMS into 1k I with a 5V supply and 2VRMS into 600I loads from a 3.3V supply. A headphone load is capable of being driven with 125m W into 32I with a 5V supply. The IC is offered with an internally fixed 6d B gain or 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. Two versions of the IC are available with different turnon times (t ON). The A, C, and E versions for headphone applications feature a t ON of 5.5ms while the B and D versions, intended for set-top-box applications, feature a 130ms t ON. An on-chip charge pump inverts the powersupply 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 the output about ground, eliminating the need for large, distortion-introducing output coupling capacitors. The IC powers on and off without clicks or pops. The IC is available in a 3mm x 3mm x 0.8mm, 16-pin TQFN and is specified over the extended -40NC to +85NC temperature range. Applications Simple Multimedia Interfaces Set-Top Boxes Blu-ray K and DVD Players LCD Televisions Prosumer Audio Devices Features S Output Power 125m W into 32I with a 5V Supply S 3VRMS Output Drive into 1k I with a 5V Supply S 2VRMS Output Drive into 600I with a 3.3V Supply S Fully Differential Inputs S Fixed or Externally Adjustable Gain with No Clicks or Pops S Wide 2.5V to 5.5V Operating Range S Direct Drive Outputs Eliminate DC-Blocking Capacitors S Flat THD+N, Better Than 90d B in the Audio Band S 18-Bit SNR Performance, 112d B S Footprint...