NJU Channels Electronic Volume PACKAGE OUTLINE
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1 Channels Electronic Volume GENERAL DESCRIPTION The NJU7 is a channels I C electronic volume IC with external mute controls. PACKAGE OUTLINE The NJU7 has many characteristics that are useful in audio application, such as low noise, low distortion, and wide operating voltage range. All functions are controlled by I C BUS interface. FEATURES Operating Voltage =.5V.5V Input Gain db/+db/+db/+9db Volume ~-95dB/Mute,dBstep Low Distortion.% typ. Low Noise.µVrms typ. External Mute Zero Cross Detection I C BUS Control CMOS Technology Small Package SSOP BLOCK DIAGRAM PIN CONFIGURATION SSOP IN IN MUTE SDA SCL I C Vref Zero Cross Detection OUT OUT No. Symbol Function - - IN Input Terminal IN Input Terminal 5 MUTE Mute Terminal SDA I C Data Input Terminal /Acknowledge Output 7 SCL I C Clock Terminal 8 V+ Power Supply Terminal 9 VREF Reference Voltage Terminal GND Ground Terminal OUT Output Terminal OUT Output Terminal - - Ver..8E
2 ABSOLUTE MAXIMUM RATING (Ta=5 C) PARAMETER SYMBOL RATING UNIT Supply Voltage +5 V Power Dissipation P D 5 (Note) mw Maximum Input Voltage V IMAX ~ (Note) V Operating Temperature Range Topr - ~ +85 C Storage Temperature Range Tstg - ~ +5 C (Note) EIA/JEDEC STANDARD Test board (7.x.x.mm, layer, FR-) mounting (Note) Don t put Input Voltage more than Power Supply Voltage. ELECTRICAL CHARACTERISTICS (Ta=5 C, =9V, R L=7k, V IN=.5Vrms, f=khz, all controls flat unless otherwise specified) PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT Operating Voltage V Supply Current I DD No signal ma Reference Voltage V REF No signal V Maximum Input Voltage V INS Main Volume=-dB,THD=% -. - Vrms Maximum Output Voltage V OM THD=%.. - Vrms Voltage Gain G V Input Gain=+dB, V IN=mVrms 8 db Voltage Gain G V db Voltage Gain G V Main Volume=Mute, BW=Hz-kHz db Channel Balance G CB Main Volume=dB - db Total Harmonic Distortion THD Vo=.5Vrms,BW=Hz~kHz -.. % Output Noise Voltage V NO Main Volume=dB μvrms Channel Separation CS R g= db MUTE TERMINAL CONTROL CHARACTERISTICS(Ta=5 C, all controls flat unless otherwise specified) PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT Low Level Input Voltage V IL -. V High Level Input Voltage V IH. - V CONTROL TERMINAL EXPLANATION Mute Terminal- (Ta=5 C, =9V, R L=7k, V IN=.5Vrms, f=khz, all controls flat unless otherwise specified) MODE STATUS TEST CONDITION Mute ON H Mute is Active Mute OFF L Mute is NOT Active
3 TERMINAL DESCRIPTION Terminal SYMBOL FUTION EQUIVALENT CIRCUIT VOLTAGE V+ IN IN kω AC Input / 8kΩ V REF Internal VDD kω 5 MUTE MUTE Control V kω V+ SDA I C Data Input /Acknowledge Output.7Ω kω - ACK V+ 7 SCL I kω C Clock Input -
4 TERMINAL DESCRIPTION Terminal SYMBOL FUTION EQUIVALENT CIRCUIT VOLTAGE V+ 8 V+ Supply Voltage V+ Ω 9 VREF Reference Voltage 75kΩ / 75kΩ V+ OUT OUT Ω AC Output / kω V REF
5 TEST CIRCUIT I DD / V REF V INS / V OM / G V / G V / G V / G CB / THD IN OUT IN OUT R L =7kΩ V IN OUT IN OUT R L =7kΩ V MUTE 5 Zero Cross Detection GND MUTE 5 Zero Cross Detection GND SDA SCL 7 I C Vref Bias VREF 9 uf 8 V A SDA SCL I C Vref 7 Bias VREF 9 8 uf uf uf V NO CS IN OUT R L =7kΩ V IN OUT R L =7kΩ V IN OUT R L =7kΩ V IN OUT R L =7kΩ V MUTE GND MUTE GND 5 Zero Cross Detection 5 Zero Cross Detection SDA Vref VREF 9 uf SDA Vref VREF 9 uf SCL I C 7 Bias 8 uf SCL I C 7 Bias 8 uf 5
6 APPLICATION CIRCUIT IN OUT IN OUT MUTE GND 5 Zero Cross Detection SDA Vref VREF 9 uf SCL 7 I C Bias 8 uf
7 TIMING ON THE I C BUS (SDA, SCL) SDA t f t r t SU:DAT t f t HD:STA t SP t r t BUF SCL t HD:STA t SU:STA t SU:STO S t LOW t HD:DAT t HIGH Sr P S CHARACTERISTICS OF I/O STAGES FOR IC BUS (SDA,SCL) I C BUS Load Conditions STANDARD MODE : Pull up resistance k (Connected to +5V), Load capacitance pf (Connected to GND) FAST MODE : Pull up resistance k (Connected to +5V), Load capacitance 5pF (Connected to GND) PARAMETER SYMBOL Standard mode Fast mode MIN. TYP. MAX. MIN. TYP. MAX. Low Level Input Voltage V IL V High Level Input Voltage V IH V Low Level output voltage (ma at SDA pin) V OL V Input current each I/O pin with an input voltage between.v DD and.9v DDmax UNIT I i µa CHARACTERISTICS OF BUS LINES (SDA,SCL) FOR I C-BUS DEVICES Standard mode Fast mode PARAMETER SYMBOL MIN. TYP. MAX. MIN. TYP. MAX. UNIT SCL clock frequency f SCL khz Hold time (repeated) START condition. t HD:STA µs Low period of the SCL clock t LOW µs High period of the SCL clock t HIGH µs Set-up time for a repeated START condition t SU:STA µs Data hold time t HD:DAT µs Data set-up time t SU:DAT ns Rise time of both SDA and SCL signals t r ns Fall time of both SDA and SCL signals t f ns Set-up time for STOP condition t SU:STO µs Bus free time between a STOP and START condition t BUF µs Capacitive load for each bus line C b pf Noise margin at the Low Level V nl V Noise margin at the High Level V nh V C b ; total capacitance of one bus line in pf. 7
8 RECOMMENDED POWER-UP SEQUEE V+ (8pin) t 5msec SDA/SCL (pin/7pin) t 8
9 DEFINITION OF I C REGISTER Note) Please don't send except specified data for avoiding an incorrect operation. I C BUS FORMAT MSB LSB MSB LSB MSB LSB S Slave Address A Select Address A Data A P bit 8bit bit 8bit bit 8bit bit bit S: Starting Term A: Acknowledge Bit P: Ending Term SLAVE ADDRESS Slave Address MSB LSB - Hex 88(h) CONTROL REGISTER TABLE The select address sets each function (Volume A, Volume B, Volume B). The auto increment function cycles the select address as follows. H H H H <Write Mode> Select Address BIT D7 D D5 D D D D D H * * * * VOLUME A VOLUME A H ZERO VOLUME B H ZERO VOLUME B CONTROL REGISTER DEFAULT VALUE Control register default value is all. Select Address BIT D7 D D5 D D D D D H H H *: Don t Care 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" 9
10 INSTRUCTION CODE a) VOLUME A SETTING Select Address D7 D D5 D D D D D H * * * * VOLUME A VOLUME A VOLUMEA/A: to +9dB (db/step) BIT b) VOLUME B/B Select Address BIT D7 D D5 D D D D D H ZERO VOLUME B H ZERO VOLUME B ZERO /: Ch/Ch Zero Cross Detection ON/OFF setting : OFF : ON VOLUMEB/B: Volume B/B setting to -95 db (db/step) / Mute VOLUME A (Select Address : H) Gain(dB) VOLUME A Ch D D Ch D D * *: Default Value ZERO CROSS DETECTION (Select Address : H/H) ZERO ZERO Ch D7 CROSS DETECTION Ch D7 OFF* ON *: Default Value
11 VOLUME B (Select Address : H, H) VOLUME B Gain(dB) Ch D D5 D D D D D Ch D D5 D D D D D Mute Mute Mute Mute* *: Default Value
12 TYPICAL CHARACTERISTICS 8 Operating Current vs Supply Voltage Vin=no signal, R L =No Load 8 Reference Voltage vs Supply Voltage Vin=no signal, R L =No Load Operating Current [ma] o C 5 o C - o C Vref [V] 85 o C 5 o C - o C 5 5 Supply Voltage [V] 5 5 Supply Voltage [V] Volume Gain Output vs Volume Setting =9V, Ta=5 o C, f=khz, Bandpass Voltage Gain Output vs Frequency =9V, Ta=5 o C, Vin=.5Vrms, Bandpass - Volume Gain Output [db] Voltage Gain [db] db -db -db -5dB -7dB -95dB MUTE Volume Setting [db] Frequency [Hz] Voltage Gain Output vs Frequency =9V, Ta=5 o C, Vin=.Vrms, Bandpass THD+N vs Vin -Volume =9V, Ta=5 o C, f=khz, BW=Hz-kHz Voltage Gain [db] 8 9dB db db THD+N [%].. -5dB -db -db -db -db db. db - Frequency [Hz]... Input Voltage [Vrms]
13 TYPICAL CHARACTERISTICS THD+N vs Frequency Ta=5⁰C, Vin=.5Vrms (.8Vrms for =.5V), Vol =db THD+N vs Vin - Temperature =9V, f=khz, BW=Hz-KHz, Vol =db THD +N [%].. =.5V =9V THD+N [%]... =.5V.,,, Frequency [Hz]. - o C, 5 o C, 85 o C... Input Voltage [Vrms] THD+N vs Vin - Supply Ta=5⁰C, f=khz, BW=Hz-kHz, Gain=dB Maximum Ouput Voltage vs Supply Voltage f=khz THD=%,Gain =db 5 THD +N [%]....5V 9V.5V Maximum Output Voltage [Vrms] 85⁰C -⁰C 5⁰C... Input Voltage[Vrms] 5 5 Supply Voltage [V] -8 Output Noise Voltage vs Volume Setting =9V, Ta=5⁰C,Rg=, A-Weight filter -7 Channel Separation vs Frequency =9V, Vin=.5Vrms, Vol =db, BW:-8kHz Chin-Chout Output Noise Voltage[dBV] o C, 5 o C, 85 o C Channel Separration [db] ,,, Volume Setting [db] Frequency [Hz]
14 TYPICAL CHARACTERISTICS MUTE Control Characteristics Ta=5⁰C, f=khz, Vin=.5Vrms (.8Vrms for =.5V), Vmute= OFF -> ON Output Gain [db] V.5V - 9V - 5 MUTE pin Voltage [V] [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.
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