Channels Electronic olume 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 oltage + =.. Input Gain db/+db/+db/+9db olume ~-9dB/Mute,dBstep Low Distortion.% typ. Low Noise.µrms typ. External Mute Zero Cross Detection I C BUS Control CMOS Technology Small Package SSOP SSOP BLOCK DIAGRAM PIN CONFIGURATION IN IN IN IN I C ref Zero Cross Detection OUT OUT OUT OUT No. Symbol Function IN Input Terminal IN Input Terminal IN Input Terminal IN Input Terminal Mute Terminal I C Data Input Terminal /Acknowledge Output 7 I C Clock Terminal 8 + Power Supply Terminal 9 REF Reference oltage Terminal GND Ground Terminal OUT Output Terminal OUT Output Terminal OUT Output Terminal OUT Output Terminal er..e
ABSOLUTE MAXIMUM RATING (Ta= C) PARAMETER SYMBOL RATING UNIT Supply oltage + + Power Dissipation P D (Note) mw Maximum Input oltage IMAX ~ + (Note) Operating Temperature Range Topr - ~ +8 C Storage Temperature Range Tstg - ~ + C (Note) EIA/JEDEC STANDARD Test board (7.x.x.mm, layer, FR-) mounting (Note) Don t put Input oltage more than Power Supply oltage. ELECTRICAL CHARACTERISTICS (Ta= C, + =9, R L=7kΩ, IN=.rms, f=khz, all controls flat unless otherwise specified) PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT Operating oltage +. 9. Supply Current I DD No signal - ma Reference oltage REF No signal... Maximum Input oltage INS Main olume=-db,thd=% -. - rms Maximum Output oltage OM THD=%.. - rms oltage Gain G Input Gain=+dB, IN=mrms 8 db oltage Gain G -.. db oltage Gain G Main olume=mute, BW=Hz-kHz - - -9 db Channel Balance G CB Main olume=db - db Total Harmonic Distortion THD o=.rms,bw=hz~khz -.. % Output Noise oltage NO Main olume=db -. 7. µrms Channel Separation CS R g= - - -9 db TERMINAL CONTROL CHARACTERISTICS(Ta= C, all controls flat unless otherwise specified) PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT Low Level Input oltage IL -. High Level Input oltage IH. - + CONTROL TERMINAL EXPLANATION Mute Terminal- (Ta= C, + =9, R L=7kΩ, IN=.rms, 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
TERMINAL DESCRIPTION Terminal SYMBOL FUNCTION EQUIALENT CIRCUIT OLTAGE + IN IN IN IN kω AC Input + / 8kΩ REF Internal DD kω Control kω + I C Data Input /Acknowledge Output.7Ω kω - ACK + 7 I kω C Clock Input -
TERMINAL DESCRIPTION Terminal SYMBOL FUNCTION EQUIALENT CIRCUIT OLTAGE + 8 + Supply oltage + + Ω 9 REF Reference oltage 7kΩ + / 7kΩ + OUT OUT OUT OUT Ω AC Output + / kω REF
TEST CIRCUIT I DD / REF INS / OM / G / G / G / G CB / THD IN OUT IN OUT IN OUT IN OUT IN OUT IN OUT IN OUT IN OUT Zero Cross Detection GND Zero Cross Detection GND ref I C 7 Bias REF 9 uf + 8 A + 7 REF ref 9 I C + + Bias 8 uf uf uf NO CS IN OUT IN OUT IN OUT IN OUT IN OUT IN OUT IN OUT IN OUT Zero Cross Detection GND Zero Cross Detection GND ref REF 9 uf ref REF 9 uf 7 I C + + Bias 8 uf 7 I C + + Bias 8 uf
APPLICATION CIRCUIT IN OUT IN OUT IN OUT IN OUT + GND Zero Cross Detection ref REF 9 uf 7 I C + + Bias 8 uf
TIMING ON THE I C BUS (,) t f t r t SU:DAT t f t HD:STA t SP t r t BUF 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 (,) I C BUS Load Conditions STANDARD MODE : Pull up resistance kω (Connected to +), Load capacitance pf (Connected to GND) FAST MODE : Pull up resistance kω (Connected to +), Load capacitance pf (Connected to GND) PARAMETER SYMBOL Standard mode Fast mode MIN. TYP. MAX. MIN. TYP. MAX. UNIT Low Level Input oltage IL. -.. -. High Level Input oltage IH.7 -..7 -. Low level output voltage (ma at pin) OL -. -. Input current each I/O pin with an input voltage between. DD and.9 DDmax I i - - - - µa CHARACTERISTICS OF BUS LINES (,) FOR I C-BUS DEICES Standard mode Fast mode PARAMETER SYMBOL MIN. TYP. MAX. MIN. TYP. MAX. UNIT clock frequency f - - - - khz Hold time (repeated) START condition. t HD:STA. - -. - - µs Low period of the clock t LOW.7 - -. - - µs High period of the clock t HIGH. - -. - - µs Set-up time for a repeated START condition t SU:STA.7 - -. - - µs Data hold time NOTE) t HD:DAT - - - - µs Data set-up time t SU:DAT - - - - ns Rise time of both and signals t r - - - - ns Fall time of both and 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.7 - -. - - µs Capacitive load for each bus line C b - - - - pf Noise margin at the Low level nl. - -. - - Noise margin at the High level nh - - - - C b ; total capacitance of one bus line in pf. 7
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 SLAE ADDRESS Slave Address Hex MSB LSB - 8(h) CONTROL REGISTER TABLE The select address sets each function (olume A, olume B, olume B, olume B, olume B). The auto increment function cycles the select address as follows. H H H H H H <Write Mode> Select BIT Address D7 D D D D D D D H OLUME A OLUME A OLUME A OLUME A H ZERO OLUME B H ZERO OLUME B H ZERO OLUME B H ZERO OLUME B CONTROL REGISTER DEFAULT ALUE Control register default value is all. Select BIT Address D7 D D D D D D D H H H H H : Don t Care *The control resistor setting may not be above values when power is turned on due to the noise of power supply. Please send initial data after power on. 8
INSTRUCTION CODE a) OLUME_A SETTING Select BIT Address D7 D D D D D D D H OLUME A OLUME A OLUME A OLUME A OLUMEA/A/A/A: to +9dB (db/step) b) OLUME_B SETTING Select BIT Address D7 D D D D D D D H ZERO OLUME B H ZERO OLUME B H ZERO OLUME B H ZERO OLUME B ZERO ///: Ch/Ch/Ch/Ch Zero Cross Detection ON/OFF setting : OFF : ON OLUMEB/B/B/B: olume B/B/B/B setting to -9 db (db/step) / Mute OLUME A (Select Address : H) OLUME A Ch D D Gain(dB) Ch D D Ch D D Ch D7 D * + + +9 *: Default alue ZERO CROSS DETECTION (Select Address : H/H/H/H) Ch ZERO D7 ZERO Ch D7 CROSS DETECTION Ch D7 Ch D7 OFF* ON *: Default alue 9
OLUME B (Select Address : H/H/H/H) OLUME B Ch D D D D D D D Gain(dB) Ch D D D D D D D Ch D D D D D D D Ch D D D D D D D Mute Mute - - - - - - -9-9 -9-9 -9-9 Mute Mute* *: Default alue
TYPICAL CHARACTERISTICS Operating Current vs Supply oltage in=no signal, R L =No Load Reference oltage vs Supply oltage in=no signal, R L =No Load 8 7 Operating Current [ma] 8 8 o C - o C o C ref [] 8 o C o C - o C Supply oltage [] Supply oltage [] olume Gain Output vs olume Setting + =9, Ta= o C, f=khz, Bandpass oltage Gain Output vs Frequency + =9, Ta= o C, in=.rms, Bandpass - olume Gain Output [db] -9-7 - - - - oltage Gain [db] - - - -8 - db -db -db -db -7dB -9dB - - - - - -7-9 - olume Setting [db] Frequency [Hz] oltage Gain Output vs Frequency + =9, Ta= o C, in=.rms, Bandpass THD+N vs in -olume + =9, Ta= o C, f=khz, BW=Hz-kHz oltage Gain [db] 8 9dB db db THD+N [%].. -db -db -db -db db -db db. - Frequency [Hz]... Input oltage [rms]
TYPICAL CHARACTERISTICS THD+N vs Frequency Ta=⁰C, in=.rms (.8rms for + =.), ol =db THD+N vs in - Temperature + =9, f=khz, BW=Hz-KHz, ol =db THD +N [%]... 9 THD+N [%].. - o C... o C 8 o C.,,, Frequency [Hz] THD+N vs in - Supply Ta = ⁰C, f=khz, BW=Hz-kHz, ol=db... Input oltage [rms] Maximum Ouput oltage vs Supply oltage Ta= o C, f =khz, THD=%, ol =db THD +N [%].... 9. Maximum Output oltage [rms]... Input oltage[rms] 7 Supply oltage [] - Output Noise oltage vs olume Setting + =9, Ta=⁰C, Rg=, A-Weight -7 Channel Separation vs Frequency + =9, in=.rms, ol =db, Bandpass Output Noise oltage[db] - - - -⁰C ⁰C 8⁰C Channel Separration [db] -8-9 - - OUT, OUT, OUT, OUT - - - - - - -7-9 -,,, olume Setting [db] Frequency [Hz]
TYPICAL CHARACTERISTICS Control Characteristics Ta=⁰c, f=khz, in=.rms (.8rms for + =.), mute= OFF -> ON - Output Gain [db] - - -8. - - 9. pin oltage [] [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.