工作電壓: 5 v

左右聲道獨(dú)立

過壓保護(hù)功能

高效率/低失真

2.9w/4ohm/雙通道

features:

z 16/18/20/24-bit input with i2s data format

z psnr & dr (a-weighting)

loudspeaker: 98db (psnr), 106db (dr)

headphone: 87db (psnr), 96db (dr)

z multiple sampling frequencies (fs)

8khz, 12khz, 16khz, 22.05khz, 24khz

32khz, 44.1khz, 48khz,

64khz, 88.2khz and 96khz

z system clock = 256fs

z 8fs switching for loudspeakers and headphones

z single or dual supply

single supply: 3.0~3.3v for the whole chip

dual supply: 3.0~5v for loudspeaker drivers

3.0~3.3v for others

z loudspeaker power

3.5w into 4ω load @ 0db 1khz sinewave input

2.0w into 8ω load @ 0db 1khz sinewave input

z loudspeaker power efficiency (η)

86% for 4ω @ 0db 1khz sinewave input

91% for 8ω @ 0db 1khz sinewave input

z headphone power

35mw into 32ω @1khz and 1% thd+n

65mw into 16ω @1khz and 1% thd+n

113mw into 8ω @1khz and 1% thd+n

z volume control for loudspeakers

53steps:+6~-34db(1db/step)-36~-58db(2db/step)

z mute function

z power down function

z anti-pop design

z over-temperature protection

z under-voltage shutdown

z short-circuit detection

applications:

z cd and dvd

z tv audio

z internet audio

z usb speaker

z mp3

z headphone amplifier

z pda

z portable / handheld

z mobile phone

z car audio

description:

this is a stereo digital audio amplifier with high

power efficiency, which leads to longer battery life,

less heat sink requirement, smaller board size and

lower system cost. ad82550a can detect

headphone connection and choose to drive either

stereo loudspeakers or stereo headphones.

operating with 3.0/3.3/5v loudspeaker driver supply,

each loudspeaker channel can typically deliver

0.8/1.0/2.3w to a 4ω loudspeaker, respectively, with

less than 1% thd+n. operating with 3.0/3.3v

headphone driver supply, each headphone channel

can typically deliver 29/35mw to 32ω, 54/65mw to

16ω and 94/113mw to 8ω, respectively, with less

than 1% thd+n.