8-CHANNEL ELECTRONIC VOLUME WITH INPUT SELECTOR ~ -95dB/0.5dBstep, MUTE. Multi-LSin LSout Stereo Lin ( 7) REC _L.

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1 8-CHANNEL ELECTRONIC VOLUME WITH INPUT SELECTOR GENERAL DESCRIPTION The NJU7234A is a 8-channel electronic volume with Input. It includes 8-in 2-out audio selector, REC Output and Multi-channel inputs. The NJU7234A performs low noise and low distortion characteristics with resistance ladder circuit. All of functions are controlled via two-wired serial bus. The NJU7234A is suitable for multi-channel audio system, such as AV amplifier, DVD receiver, and others. PACKAGE OUTLINE NJU7234AFH3 FEATURES Operating Voltage 2-Wired Serial Control 8-input 2-output selector Multi-Channel input (8ch x ) Input Gain Control Volume CMOS Technology Package Outline ±4.5 to ±7.5V stereo : 7-input, monaural : -input *LBch x2, RBch x2 Gain :,-5,-6,-7,-9,-,-2,-3dB 3.5 ~ -95dB/.5dBstep, MUTE LQFP52-H3 BLOCK DIAGRAM Multi-Cin Main Volume: 3.5 to -95dB/.5dB step Cout REC _L Multi-LSin LSout Stereo Lin ( 7) Multi-LBin Input Lout for ADC Multi-Lin LBout Lout Mono in ( ) Stereo Rin ( 7) Input Input Gain:,-5,-6,-7,-9,-,-2,-3dB Multi-Rin Rout for ADC REC _R Multi-RBin Multi-RSin Rout RBout RBout Multi-SWin SWout Control Logic Clock Ver 2.2E

2 PIN FUNCTION No. SYMBOL FUNCTION No. SYMBOL FUNCTION LOUT Lch output 27 R4IN Input selector Rch input 4 2 ROUT Rch output 28 L4IN Input selector Lch input 4 3 COUT Cch output 29 R5IN Input selector Rch input 5 4 LSOUT LSch output 3 L5IN Input selector Lch input 5 5 RSOUT RSch output 3 R6IN Input selector Rch input 6 6 LBOUT LBch output 32 L6IN Input selector Lch input 6 7 RBOUT RBch output 33 R7IN Input selector Rch input 7 8 SWOUT SWch output 34 L7IN Input selector Lch input 7 9 DCAP_ Switching noise rejection capacitor 35 DCAP_5 Switching noise rejection capacitor 5 DCAP_2 Switching noise rejection capacitor 2 36 MONOIN Monaural input selector GND Ground 37 DCAP_6 Input selector Lch input 7 2 DATA Control data signal input 38 ADC_R Rch output for ADC 3 CLOCK Clock signal input 39 ADC_L Lch output for ADC 4 DCAP_3 Switching noise rejection capacitor 3 4 GND Ground 5 REC_R Input selector Rch REC output 4 LIN Multi-channel Lch input 6 REC_L Input selector Lch REC output 42 RIN Multi-channel Rch input 7 GND Ground 43 CIN Multi-channel Cch input 8 RB2IN Multi-channel RBch input 2 44 LSIN Multi-channel LSch input 9 LB2IN Multi-channel LBch input 2 45 RSIN Multi-channel RSch input 2 RIN Input selector Rch input 46 LBIN Multi-channel LBch input 2 LIN Input selector Lch input 47 RBIN Multi-channel RBch input 22 R2IN Input selector Rch input 2 48 SWIN Multi-channel SWch input 23 L2IN Input selector Lch input 2 49 V- Power Supply (-) 24 R3IN Input selector Rch input 3 5 V Power Supply () 25 L3IN Input selector Lch input 3 5 DCAP_7 Switching noise rejection capacitor 7 26 DCAP_4 Switching noise rejection capacitor 4 52 DCAP_8 Switching noise rejection capacitor 8 2

3 ABSOLUTE MAXIMUM RATING (Ta=25 C) PARAMETER SYMBOL RATING UNIT Power Supply Voltage V /V - 8/-8 V Maximum Input Voltage V IM V /V - V Power Dissipation P D 8 NOTE: EIA/JEDEC STANDARD Test board (76.2x4.3x.6mm, 2layer, FR-4) mounting Operating Temperature Range Topr -4 to 85 C Storage Temperature Range Tstg -4 to 25 C ELECTRICAL CHARACTERISTICS (Ta=25 C, V /V - =±7V, RL=47kΩ, Volume=dB) PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT Power Supply Operating Voltage V /V - ±4.5 ±7. ±7.5 V Supply Current I CC No signal ma Supply Current 2 I EE No signal ma mw Input/Output Characteristics (Output) Maximum Output Voltage Maximum Input Voltage Voltage Gain Voltage Gain 2 Voltage Gain Error Maximum Attenuation Attenuation Error Output Noise Output Noise2 Total Harmonic Distortion Total Harmonic Distortion 2 Cross Talk Cross Talk 2 Channel Separation Channel Separation 2 V OM V IM G V G V2 G V A TT A TT V NO V NO2 T.H.D. T.H.D.2 CT CT2 CS CS2 f=khz, THD=% Volume=dB f=khz, THD=% Volume=-2dB V IN =2Vrms, f=khz Volume=dB V IN =mvrms, f=khz Volume=5dB V IN =2Vrms, f=khz Volume=dB f=khz, V IN =2Vrms Volume=Mute, A-weight f=khz, V IN =2Vrms Volume=-6dB Volume=dB, Rg=, A-weight Volume=-95dB, Rg=, A-weight f=khz,v IN =Vrms, Volume=dB,BW=4Hz-3kHz f=khz,v IN =Vrms, Volume=dB, BW=4Hz -3kHz f=khz,v IN =2Vrms,A-weight Volume=dB, Rg=Ω f=2khz, V IN =2Vrms, Volume=dB, Rg=Ω f=khz, V IN =2Vrms,A-weight Volume=dB, Rg=Ω f=2khz, V IN =2Vrms, Volume=dB, Rg=Ω Vrms Vrms db db db db - db (.4µ) -7 (.4µ) -4 (6.3µ) -4 (6.3µ) dbv (Vrms) dbv (Vrms) -.4. % % db db db db 3

4 ELECTRICAL CHARACTERISTICS (Ta=25 C, V /V - =±7V, RL=47kΩ, Volume=dB) PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT Input/Output Characteristics (REC output) REC Out Voltage Gain G VREC V IN =2Vrms, f=khz db REC Out Output Noise REC Out Total Harmonic Distortion REC Out Maximum Attenuation V NOREC Rg=Ω, A-weight - T.H.D REC A TTREC Input Gain Control Characteristics f=khz, V IN =Vrms, BW=4Hz-3kHz f=khz, V IN =2Vrms REC Out=Mute, A-weight -4 (2µ) - dbv (Vrms) % db Input Gain Control Voltage Gain Input Gain Control Voltage Gain 2 Input Gain Control Voltage Gain 3 Logic Control Characteristics G VINC G VINC2 G VINC3 f=khz, V IN =2Vrms, Input Gain = db f=khz, V IN =2Vrms, Input Gain = -6dB f=khz, V IN =2Vrms, Input Gain = -2dB -.. db db db High Level Input Voltage V IH DATA, CLOCK Terminal Input V V Low Level Input Voltage V IL DATA, CLOCK Terminal Input -. V 4

5 APPLICATION CIRCUIT C47 C46 C LOUT ROUT COUT LSOUT RSOUT LBOUT RBOUT SWOUT DCAP_ DCAP_2 GND DATA CLOCK C C2 C3 C4 C5 C6 C7 C C9 9 C JP JP C9 C2 C2 L2IN R3IN L3IN LIN GND C8 R2IN DCAP_8 DCAP_7 C45 C44 C42 C4 C4 C39 C38 Control Logic C34 C32 C3 C35 C33 C3 C29 C28 C27 C26 C25 C24 C23 ADC_L ADC_R DCAP_6 MONOIN DCAP_5 L7IN R7IN L6IN R6IN L5IN R5IN L4IN R4IN C C2 C3 C4 C5 C7 LIN C6 RIN DCAP_3 REC_L REC_R GND RB2IN LB2IN DCAP_4 V V- SWIN RBIN LBIN RSIN LSIN CIN RIN C43 C22 C37 Rch Selecotr 2 Rch Selecotr Lch Selecotr 2 Lch Selecotr Note.) When switching REC(REC Output) and REC, use MUTE for REC_L pin and REC_R pin on the set. When switching Input Gain and Input, use MUTE for ADC_L pin and ADC_R pin on the set. 5

6 TIMING ON THE 2-Wire BUS (DATA, CLOCK) DATA CLOCK t SU:STA t HD:STA t HIGH t SU:DAT t SU:STO t BUF t LOW t HD:DAT Note.) Set CLOCK in Low to prevent incorrect operation during a standby period CHARACTERISTICS OF I/O STAGES FOR 2-Wire BUS (DATA, CLOCK) PARAMETER SYMBOL MIN. TYP. MAX. UNIT t HD_STA Hold time (repeated) START condition µs t LOW Low period of the SCL clock µs t HIGH High period of the SCL clock µs t SU_STA Set-up time for a repeated START condition 2 µs t HD_DAT hold time ns t SU_DAT set-up time 2 ns t SU_STO Set-up time for STOP condition µs t BUF Bus free time between a STOP and START condition 4 µs 6

7 DEFINITION OF 2-Wire REGISTER Note) Please don't send except specified data for avoiding an incorrect operation. 2-Wire BUS FORMAT MSB LSB MSB LSB MSB LSB S Chip Address Select Address P bit 8bit bit 8bit bit 8bit bit bit S: Starting Term P: Ending Term Chip Address MSB LSB Select Address The select address sets each function (Volume, Input Gain, Input, Multi, Other Settings). The auto increment function cycles the select address as follows. H H 2H 3H 4H 5H 6H 7H 8H 9H AH H MSB LSB Select Address D7 D6 D5 D4 D3 D2 D D H H 2H 3H 4H 5H 6H 7H Lch Volume Rch Volume Cch Volume LSch Volume RSch Volume LBch Volume RBch Volume SWch Volume 8H Input Gain REC Input 9H Rec Cch SWch LSch AH Lch Rch LBch RBch RSch CONTROL REGISTER DEFAULT VALUE MSB LSB Select Address D7 D6 D5 D4 D3 D2 D D H H 2H 3H 4H 5H 6H 7H 8H 9H AH Note.) This product starts up by MUTE setting in power ON. Use it after removing MUTE of each setting. If any audio signal is inputted in input signal terminal before power ON, it may cause initial condition abnormality. In conditions of use such as the above, it prevents that abnormality by setting MUTE before power OFF" 7

8 DEFINITION OF RESISTOR Volume Control : 3.5dB to -95dB /.5dBstep. MSB LSB Select Address D7 D6 D5 D4 D3 D2 D D H Lch Volume H Rch Volume 2H Cch Volume 3H LSch Volume 4H RSch Volume 5H LBch Volume 6H RBch Volume 7H SWch Volume < Volume Control > Setting D7 D6 D5 D4 D3 D2 D D Mute ( ) 3.5dB 3.dB 3.5dB 3.dB 29.5dB 29.dB 28.5dB 28.dB 4.dB 3.5dB 3.dB 2.5dB 2.dB.5dB.dB.5dB db -.5dB -.db -.5dB -2.dB -2.5dB -3.dB -3.5dB -4.dB -89.dB -89.5dB -9.dB -9.5dB -9.dB -9.5dB -92.dB -92.5dB -93.dB -93.5dB -94.dB -94.5dB -95.dB Mute ( ) Initial Setting 8

9 Input Gain REC Input : Gain control for selected signal at the Input. : REC Output ON/OFF : for the monaural input and stereo inputs from IN to 8IN MSB LSB Select Address D7 D6 D5 D4 D3 D2 D D 8H Input Gain REC Input < Input Gain Control > D7 D6 D5 Setting db ( ) -5dB -6dB -7dB -9dB -db -2dB -3dB <REC ON/OFF > D4 Setting REC Output OFF ( ) REC Output ON < Input > D3 D2 D D Setting Mute ( ) IN (2ch Input ) 2IN (2ch Input 2) 3IN (2ch Input 3) 4IN (2ch Input 4) 5IN (2ch Input 5) 6IN (2ch Input 6) 7IN (2ch Input 7) MONOIN (2ch monoral Input ) ( ) Initial Setting 9

10 REC : for the 2 channel Input signal to REC output Cch : Cch Multi-Channel SWch : SWch Multi-Channel LSch : LSch Multi-Channel RSch : RSch Multi-Channel MSB LSB Select Address D7 D6 D5 D4 D3 D2 D D 9H Rec Cch SWch LSch < Rec > D7 D6 D5 D4 Setting Mute ( ) IN (2ch Input ) 2IN (2ch Input 2) 3IN (2ch Input 3) 4IN (2ch Input 4) 5IN (2ch Input 5) 6IN (2ch Input 6) 7IN (2ch Input 7) MONOIN (2ch monaural Input ) RSch <Cch Multi > D3 Setting MUTE ( ) Multi-Channel Input <SWch Multi > D2 Setting MUTE ( ) Multi-Channel Input <LSch Multi > D Setting MUTE ( ) Multi-Channel Input <RSch Multi > D Setting MUTE ( ) Multi-Channel Input ( ) Initial Setting

11 Lch Rch LBch RBch : Lch Multi-Channel : Rch Multi-Channel : LBch Multi-Channel : RBch Multi-Channel MSB LSB Select Address D7 D6 D5 D4 D3 D2 D D AH Lch Rch <Lch Multi > D7 D6 Setting MUTE ( ) 8-Input Multi-Channel Input <Rch Multi > D5 D4 Setting MUTE ( ) 8-Input Multi-Channel Input LBch RBch <LBch Multi > D7 D6 Setting MUTE ( ) Multi-Channel Input Multi-Channel Input2 Lch Output <RBch Multi > D7 D6 Setting MUTE ( ) Multi-Channel Input Multi-Channel Input2 Rch Output ( ) Initial Setting

12 TYPICAL CHARACTERISTICS ICC vs Supply Voltage No signal IEE vs Supply Voltage No signal ICC [ma] Ta= -4 C IEE [ma] Ta= -4 C Ta= 25 C Ta= 25 C 5 Ta= 85 C 5 Ta= 85 C Supply Voltage [±V] Supply Voltage [±V] ICC vs Ambient Temperature No signal IEE vs Ambient Temperature No signal ICC [ma] 5 V= ± 7V V= ± 7.5V V= ± 4.5V IEE [ma] 5 V= ± 7V V= ± 7.5V V= ± 4.5V Ambient Temperature [ C] Ambient Temperature [ C] Maximum Output Voltage vs Frequency V=±7V, THD=%, I/O: LIN-LOUT Maximum Output Voltage vs Supply Voltage f =khz, THD=%, I/O: LIN-LOUT 5. 6 Maximum Output Voltage [Vrms] Ta= 85 C Ta= 25 C Ta= -4 C Frequency [Hz] Maximum Output Voltage [Vrms] Ta= 85 C Ta= 25 C Ta= -4 C Supply Voltage [±V] 2

13 TYPICAL CHARACTERISTICS Volume Gain output vs Frequency V=±7V, Vin=2Vrms(VOL=,-5,-95dB, Mute), Vin=.Vrms(VOL=5,3dB), Bandpass, I/O: LIN-Lout Volume Gain Output vs Volume Setting V=±7V, f=khz, Bandpass, I/O: LIN-LOUT Volume Gain Output [db] VOL= db VOL= 5dB VOL= -5dB VOL= Mute VOL= 3dB VOL= -95dB Volume Gain Output [db] Ta= -4, 25, 85-4 Frequency [Hz] Volume Setting [db] THDN vs Input Voltage V=±7V, BW:-22kHz(f=2Hz), 4-3kHz(f=kHz), 4-8kHz(f=2kHz), I/O: LIN-LOUT THDN vs Input Voltage V=±7V, f=khz, BW:4-3kHz, I/O: LIN-LOUT VOL= -3dB VOL= -2dB VOL= -db THDN [%]_.. f=2khz THDN [%]_.. VOL=dB. f=2hz. f=khz... Input Voltage [Vrms]... Input Voltage [Vrms] THDN vs Ambient Temperature V=±7V, Vin=Vrms, f=khz, BW:4-3kHz, I/O: LIN-Lout THDN vs Frequency V=±7V, VOL=dB, BW:-8kHz, I/O: LIN-LOUT THDN [%]_.. THDN [%]_.. Vin=Vrm Vin=2Vrms Ambient Temperature [ C]. Frequency [Hz] 3

14 TYPICAL CHARACTERISTICS Output Noise Voltage vs Ambient Temperature V=±7V, Rg=Ω, VOL=dB, A-Weighted Output Voltage vs Load Resistance V=±7V, f=khz, Vin=4.2Vrms, VOL=dB, 5 Lch Output Output Noise Voltage [dbv] Lch Output Output Voltage [Vrms] Ambient Temperature [ C] Load Resistance [Ω] Channel Separation vs Frequency V=±7V, Vin=2Vrms, VOL=dB, BW:-8kHz, I/O: RIN-LOUT Cross Talk vs Frequency V=±7V, Vin=2Vrms, VOL=dB, BW:-8kHz, I/O: LIN,L3IN-LOUT, Select Channel:2ch -4-4 Rg=5.kΩ Rg=5.kΩ Channel Separation [db] Rg=62Ω Rg=Ω Rg=3.3kΩ Cross Talk [db] Rg=Ω Rg=3.3kΩ Rg=62Ω -2-2 Frequency [Hz] Frequency [Hz] [CAUTION] The specifications on this databook are only given for information, without any guarantee as regards either mistakes or omissions. The application circuits in this databook are described only to show representative usages of the product and not intended for the guarantee or permission of any right including the industrial rights. 4