NJU7087
DESCRIPTION
The NJU7087 is a Sound Enhancement Processor for telephone, using a low power C-MOS technology. Sound enhancement and LPF circuit improve quality of conversation without increasing noise. The NJU7087 is suitable for limited band-width application, such as telephone, and answer phone. s PACKAGE OUTLINE s FEATURES q Operating Voltage q Low Operating Current q Low Output Noise q Bypass Gain q Adjustable Boost Level(High) q Package Outline s PIN CONFIGURATION
NJU7087 (VDD=2.4 to 5.5V) (2m A typ.at VDD=3V) (31.6µVrms typ. at BBE ON) (0d B typ.) (SSOP16)
VDD INPUT (NC) HPF CR1 BPF CR2 LPF
GND VREF BBE OUTPUT CR5 CR4 BBEOUT CR3
No. 1 2 3 4 5 6 7 8
SYMBOL VDD INPUT (NC) HPF CR1 BPF CR2 LPF
FUNCTION Power Supply Signal Input (No Connected) HPF Output Filter BPF Output Filter LPF Output
No. 9 10 11 12 13 14 15 16
SYMBOL CR3 BBEOUT CR4 CR5 OUTPUT BBE VREF GND
FUNCTION Filter BBE Output Filter Filter Signal Output BBE ON/OFF Reference Voltage GND s BLOCK...
