NJM2705 Datasheet, PDF (1/14 Pages) New Japan Radio – Surround Audio Processor for Mobile Applications

NJM2705
Surround Audio Processor for Mobile Applications
s GENERAL DESCRIPTION
The NJM2705 is the surround audio processor for mobile
applications.
It regenerates the 3D surround sound with extremely narrow
space two speakers (2SP mode), headphone surround with
normal headphone (HP mode) and reverberation sound with
only one speaker (1SP mode).
It includes mode control switches for surround function and
standby function and realizes low consumption power design by
standby function.
In addition to SSOP16, ultra small and thin packages FFP16
(Flip-Chip Fine Package) and PCSP16 (Plastic Chip Size
Package) is applied.
It is suitable for cellular phone, PDA and portable game.
s PACKAGE OUTLINE
NJM2705PB1
NJM2705SD3
NJM2705V
s FEATURES
q Operating Voltage
1.8 to 6V
q Operating Current
0.7mA typ. at Active mode
1µA max. at Standby mode
q Low Output Noise
10µVrms typ
(2SP/HP/1SP mode, VR : max.)
q Variable Surround Effect by external resistor
(Adjustable for speaker and headphone independently.)
q Standby Function
q Internal Mode Control Switch
q Bipolar Technology
q Package Outline
FFP16, PCSP16, SSOP16
s BLOCK DIAGRAM
LIN
RIN
3D
Filter
3D
Enha ncer
1SP
Surround
LOUT
ROUT
2SP mode
HP mode
1SP mode
Bypass mode
Surround mode
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