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NJU7087

New Japan Radio
Part Number NJU7087
Manufacturer New Japan Radio
Description Sound Enhancement Processor For Telephone
Published May 7, 2005
Detailed Description NJU7087 PRELIMINARY Sound Enhancement Processor For Telephone sGENERAL DESCRIPTION The NJU7087 is a Sound Enhancement P...
Datasheet PDF File NJU7087 PDF File

NJU7087
NJU7087

Overview
NJU7087 PRELIMINARY Sound Enhancement Processor For Telephone sGENERAL 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.
sPACKAGE OUTLINE sFEATURES qOperating Voltage qLow Operating Current qLow Output Noise qBypass Gain qAdjustable Boost Level(High) qPackage Outline sPIN CONFIGURATION NJU7087 (VDD=2.
4 to 5.
5V) (2mA typ.
at VDD=3V) (31.
6µVrms typ.
at BBE ON) (0dB 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 sBLOCK DIAGRAM NJU7087 VDD HPF CR1 BPF CR2 LPF CR3 BBEOUT CR4 CR5 INPUT OUTPUT GND BBE VREF -1- NJU7087 sABSOLUTE MAXMUM RATINGS (Ta=25°C) PARAMETER Supply Voltage Input Voltage Power Dissipation Operating Temperature Range Storage Temperature Range SYMBOL VDD VI PD Topr Tstg RATING 7.
0 GND-0.
5 to VDD+0.
5 300 -40 to +85 -55 to +125 UNIT V V mW °C °C sELECTRICAL CHARACTERISTICS(VDD=3V,Vss=0V,Ta=25°C) PARAMETER Operating Voltage Supply Current Reference Voltage BBE Terminal Input Current BBE Terminal Input Voltage Boost Level Maximum Input Voltage SYMBOL TEST CONDITION BBE - MIN.
2.
4 0.
8VDD GND TYP.
2.
0 1.
5 -1.
0 4.
0 MAX.
5.
5 4.
0 VDD 0.
2VDD UNIT V mA V µA V V dB VDD IDD VREF IBBE VBBEH VBBEL No Signal - BBE Terminal=3V - Boost VOMH VOML R1=24kΩ,R3=56kΩ,f=3kHz RL=50kΩ RL=50kΩ f=1kHz f=1kHz,Vin=0.
1Vrms, Boost=4.
0dB Input=GND,Boost=4.
0dB, A-Weighting ON Bypass Bypass Bypass ON ON VDD -0.
1 -1 - 0 0.
1 -90 (31.
6) Vss +0.
1 1 -60 (100...


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