njw1148a New Japan Radio Co.,Ltd, njw1148a Datasheet
njw1148a
Related parts for njw1148a
njw1148a Summary of contents
Page 1
... Audio Processor with Sound Enhancement and TruSurround Virtualizer GENERAL DESCRIPTION The NJW1148A is an audio processor with BBE sound enhancement and SRS Labs' TruSurround virtualizer. It includes all of functions processing audio signal for TV, such as volume, balance, mute, line out, tone control, eala NJRC surround and simulated stereo functions. All of ...
Page 2
... NJW1148A PIN FUNCTION 39 48 No. SYMBOL 1 TS3 TruSurround Filter Capacitor 3 Ach Input 2 INA 3 BBECHA Ach BBE High-Pass Filter Capacitor 4 BBECLA Ach BBE Low-Pass Filter Capacitor 5 TONECHA Ach TONE Treble Filter Capacitor Ach TONE Bass Filter Capacitor 6 TONECLA 7 LINEOUTA Ach Line Output 8 OUTA ...
Page 3
... BW = 400Hz to 30kHz + =9V, R =47kΩ, Vin=100mVrms/1kHz L SYMBOL TEST CONDITION G TREB=+15dB, f=10kHz HFBST G TREB=0dB,f=10kHz HFFLT G TRBE=-15dB, f=10kHz HFCUT G BASS=+15dB, f=100Hz LFBST G BASS=0dB, f=100Hz LFFLT G BASS=-15dB, f=100Hz LFCUT NJW1148A RATING 12 ) -20 to +75 -40 to +125 MIN. TYP. MAX. 8.0 9.0 10 4.0 4.5 5.0 2.8 3 2.5 - -1.5 ...
Page 4
... NJW1148A AGC CHARACTERISTICS (Ta= MODE ; VOL=0dB, BAL=0dB, SUR=OFF, AGC=ON, BBE=OFF, Tone=0dB) PARAMETER AGC Boost AGC Flat 1 AGC Flat 2 AGC Flat 3 AGC Flat 4 AGC Cut BBE CHARACTERISTICS (Ta= MODE ; VOL=0dB, BAL=0dB, SUR=OFF, AGC=OFF, Tone=0dB) PARAMETER Low Boost Gain High Boost Gain eala CHARACTERISTICS (Ta= MODE ...
Page 5
... BUS (SDA,SCL) Pull up resistance 4k (Connected to +5V), Load capacitance 200pF (Connected to GND) Pull up resistance 4k (Connected to +5V), Load capacitance 50pF (Connected to GND) SYMBOL NJW1148A HD:STA SP t SU:STO Standard mode Fast mode MIN. TYP. MAX. MIN. TYP. ...
Page 6
... HD:DAT Please hold the Data Hold Time (t The SDA block in the NJW1148A does not hold data. Add external data-delay-circuit of the SDA terminal, in case of not providing a hold time of at least 300nsec for the SDA in the master device. The time-consists of the data-delay-circuit of the SDA terminal are as follows. ...
Page 7
... The constant of capacitors connected to the terminals No. 4.7nF NJW1148A Symbol Pin No TONECLA 33 TONECLB TONECHB 35 40 BBECLB 1,38,39,40,41,47 NJW1148A 0.22µF 4.7nF 0.22µF 38 SRS4 0.1µF 37 INB 3.3nF 36 BBECHB 33nF 35 BBECLB 2.2nF 34 TONECHB 100nF 33 TONECLB + 32 LINEOUTB 4.7µ OUTB 4.7µF 30 MIXOUT 29 ...
Page 8
... NJW1148A < MIXOUT, LFIN, LFOUT Low Pass Filter Setting > LPF cut off frequency and quality factor are adjusted by the external parts and given by the following functions. 30 MIXOUT – 8 – LFIN (Hz LFOUT ...
Page 9
... Filter Capacitor 36 BBECHB Bch BBE High-Pass Filter Capacitor 4 BBECLA Ach BBE Low-Pass Filter Capacitor 35 BBECLB Bch BBE Low-Pass Filter Capacitor 5 TONECHA Ach TONE Treble Filter Capacitor 34 TONECHB Bch TONE Treble Filter Capacitor EQUIVALENT CIRCUIT 2,37 200k 3,36,4,35 20k NJW1148A TERMINAL VOLTAGE V+/2 V+/2 V+/2 5,34 V+/2 – 9 – ...
Page 10
... NJW1148A PIN SYMBOL FUNCTION NO. 6 TONECLA Ach TONE Bass Filter Capacitor 33 TONECLB Bch TONE Bass Filter Capacitor 7 LINEOUTA Ach Line Output 8 OUTA Ach Output 9 OUTC Center Output 28 LFOUT Buffer Output for LPF 30 MIXOUT Ach Bch Mixed Output 31 OUTB Bch Output 32 LINEOUTB ...
Page 11
... VOLBTC B ch Volume Switching Noise Rejection Capacitor 15 VOLCTC Center ch Volume Switching Noise Rejection Capacitor 2 16 SDA I C Data Input 2 17 SCL I C Clock Input 18 GND Ground 20 V+ Power Supply EQUIVALENT CIRCUIT 8k 8k 16, NJW1148A TERMINAL VOLTAGE Vref-0.7V 13,14,15 (Volume Max) (0dB – 11 – ...
Page 12
... NJW1148A PIN SYMBOL FUNCTION NO. 21 VREF Reference Voltage Stabilizing Capacitor 22 TONEHTC Tone Control Treble Switching Noise Rejection Capacitor 23 TONELTC Tone Control Bass Switching Noise Rejection Capacitor 24 OUTTC Line Output switching Noise Rejection Capacitor 25 BBELTC BBE Low Switching Noise Rejection Capacitor – 12 – ...
Page 13
... Rejection Capacitor 29 LFIN Buffer Output for LPF 46 CEALA eala Filter Capacitor 38 SRS4 SRS Filter Capacitor 4 39 SRS3 SRS Filter Capacitor 3 40 SRS2 SRS Filter Capacitor 2 41 SRS1 SRS Filter Capacitor 1 EQUIVALENT CIRCUIT 36k 29, NJW1148A TERMINAL VOLTAGE Vref-0.7V 26 (High=0dB) - V+/2 V+/2 – 13 – ...
Page 14
... NJW1148A PIN SYMBOL FUNCTION NO. 42 SPACE1 SPACE Volume1 43 CENTER CENTER Volume 45 SPACE2 SPACE Volume2 – 14 – EQUIVALENT CIRCUIT 42,43,45 TERMINAL VOLTAGE V+/2 ...
Page 15
... BBEL BBEH SUR BIT NJW1148A LSB Data A 8bit 1bit 1bit LSB Don’t Care Don’t Care Don’t Care BBE Don’t Care AGC AGC LVL OUT Don’t Care D2 ...
Page 16
... NJW1148A CONTROL COMMAND TABLE a) Master Volume Select Address D7 D6 00H VOL : Master Volume Attenuation level : 0 to –80dB(0.33dB/step), MUTE The volume is consisted of VOL1 and VOL2 and the level is divided into half to each VOL1 and VOL2. ex) Volume setting is -2dB ; VOL1 and VOL2 is set -1dB each. ...
Page 17
... Surround Output Mode 2ch (TruSurround), 2.1ch (Center out) SUR : Surround Mode OFF, MONO, SRS 3D, TS, eala1, 2,3,4,5,6 OUT : Output Switch Output ON / OFF BIT BBEH BIT SUR NJW1148A AGC AGC LVL OUT Don’t care – 17 – ...
Page 18
... NJW1148A Master Volume (Select Address: 00H) Gain(dB) HEX - - - - - - - - - - - -21 C0 ...
Page 19
... NJW1148A ...
Page 20
... NJW1148A Balance (Select Address: 01H) Channel Setting (CHS) Attenuated Bch Gain Attenuated Ach Gain Gain(dB -10 0 -11 0 -12 0 -13 0 -14 0 -15 1 -16 1 -17 1 -18 1 -19 1 -20 1 -21 1 -22 1 -23 1 -24 1 -25 ...
Page 21
... NJW1148A ...
Page 22
... NJW1148A BBE-LOW Gain Code (Select Address: 04H) Gain(dB BBE (Select Address: 04H) BBE BBE ON/OFF D2 OFF BBE-HIGH Gain Code (Select Address: 05H) Gain(dB ...
Page 23
... Output Switch (Select Address: 06H) OUT Output Switch D2 OFF AGC LVL SUR NJW1148A – 23 – ...
Page 24
... The TruSurround technology right incorporated in the NJW1148A are owned by SRS Labs, a U.S. Corporation and licensed to New Japan Radio Co., Ltd. Purchaser of NJW1148A must sign a license for use of the chip and display of the SRS Labs trademarks. Any products incorporating the NJW1148A must be sent to SRS Labs for review. TruSurround is protected under U.S. and foreign patents issued and/or pending ...