BU7831KN_10 Datasheet, PDF (1/17 Pages) Rohm – Voice/Audio Mixer & Selector IC

Audio Accessory ICs for Mobile Devices
Voice/Audio
Mixer & Selector IC
BU7831KN
No.10087EAT02
●Description
BU7831KN is the sound path selector which include 3 stereo inputs, Stereo headphone amp, 600Ω driver amp, and
2stereooutputs. Each output have a mixer and an attenuator, you can set the variable audio path setting. The variable audio
source can connect to Headphone and speaker through this LSI.
●Feature
1) It has 3stereo inputs.
2) It has analog mixer on each input.
3) It matches for the application used the Headphone because it has 16Ω audio driver.
4) 16Ω driver has the pop-noise less function.
5) The attenuator of 16Ω driver has soft changing and muting function.
6) It has 600Ω driver for external output.
7) It included stereo output for stereo speaker.
8) VQFN20 small package
●Applications
It is for portable equipments with audio player.
●Absolute maximum ratings
Parameter
Symbol
Ratings
Unit
Supply voltage
Power dissipation
VDD
Pd
-0.3～4.5
V
530 ^*1
mW
Operating temperature range
Topr
-30～+85
℃
Storage temperature range
*1 Reduce by 5.3 mW/ ℃ over 25 ℃
●Recommended operating range
Parameter
Supply voltage
Tstg
-55～+125
℃
Ratings
Symbol
Unit
Min.
Typ.
Max.
VDD
2.5
3.0
3.3
V
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2010.09 - Rev.A