2ch Electronic Volume with Dynamic Bass Boost. NJW1201AFH2 Operating Voltage +7.5 to +10V I 2 C BUS Control

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1 ch Electronic Volume with Dynamic Bass Boost GENERAL DESCRIPTION The is a -channel electronic volume with Dynamic Bass Boost. 5diff-in -out selector. It includes 5diff input selector, st-volume, nd-volume, 3 band Tone, Sound mode, Dynamic Bass Boost. The performs low noise and low distortion characteristics with resistance ladder circuit. All of functions are controlled by I C BUS interface. PACKAGE OUTLINE FEATURES FH Operating Voltage 7.5 to V I C BUS Control Low output noise -dbvtyp. Low THD.%typ. 5diff Input Selector Input Gain to 3dB/dBstep st-volume to -6dB / dbstep, MUTE nd-volume to -8dB / dbstep, MUTE 3 Band Tone to ±4dB/ dbstep (Treble,Middle), to ±7.5dB/.5dBstep (Bass) Sound mode 3 modes (eala, ealatreble, eala & ealatreble) Sound Gain -level Gains Dynamic Bass Boost 3-level Gains Bi-CMOS Technology Package Outline LQFP5-H BLOCK DIAGRAM INPUT(Bch) 4.7n 4.7n n 47n n 4.7n u 3k u 5 INPUT(Ach) 4.7k 4.7k 4.7k 4.7k Filter terminal for Sound Mode 4 4 db TRE MID BAS 6 5 Filter terminal for Sound Mode AGC Smoothing Filter for Dynamic Bass Boost INPUT5 Bch INPUT6 Bch VREF INPUT6 Dif f INPUT6 Ach INPUT5 Ach to 3dB db step 5k 5k stvolume ( to -6dB,Mute db step) Sound Mode & DynamicBassBoost ndvolume ( to -8dB,Mute db step) I C 4 3 SCL 9 SDA C8 C7 R8 R7 C5 C4 OUTPUT(Bch) GND V C6 OUTPUT(Ach) ExtSense terminal. Possible to unconnect 5 5 db TRE MID BAS C C C3 R C6 4.7n C7 4.7n C8 n C9 47n C n 4 R3 C4 C5 INPUT3 Bch INPUT Bch INPUT Bch INPUT4 Bch C33 C34 C35 C36 C37 C38 C39 R6 75k R4 C 5.6k n R5.k n INPUT4 Ach C4 INPUT3 Ach INPUT Ach INPUT Ach C9 C C3 Band PassFilter terminal for Dynamic Bass Boost C8 C3 C3 C3 R C7 C6 C5 C4 C3 C R R 68n C C R9 C9 Ver..E

2 PIN CONFIGURATION LQFP No. Symbol Function No Symbol Function NC Not Connected 7 SRFil Filter for Sound Mode In3A Ach Input3 8 TONEBB Bch Bass(Tone) Filter 3 INA Ach Input 9 TONEBB Bch Bass(Tone) Filter 4 InA Ach Input 3 TONEMB Bch Middle(Tone) Filter 5 MonOutA Ach Monitor Output 3 TONEMB Bch Middle(Tone) Filter 6 RecOutA Ach Rec Output 3 TONEHB Bch Treble(Tone) Filter 7 VOLInA Ach st Volume Input 33 VOLInB Bch st Volume Input 8 TONEHA Ach Treble(Tone) Filter 34 RecOutB Bch Rec Output 9 TONEMA Ach Middle(Tone) Filter 35 MonOutB Bch Monitor Output TONEMA Ach Middle(Tone) Filter 36 InB Bch Input TONEBA Ach Bass(Tone) Filter 37 INB Bch Input TONEBA Ach Bass(Tone) Filter 38 IN3B Bch Input3 3 BPF Filter for DBB 39 NC Not Connected 4 BPF Filter for DBB 4 IN4B Bch Input4 5 BPF3 Filter 3 for DBB 4 NC Not Connected 6 VOLCAPA Ach DC coupling for nd Volume 4 IN5B Bch Input5 7 OutA Ach Output 43 NC Not Connected 8 GND Ground 44 IN6B Bch Input6 9 SDA IC DATA 45 VREF Reference Voltage SCL IC CLOCK 46 In6Diff Negative Input for Input6 V Supply Voltage 47 In6A Ach Input6 OutB Bch Output 48 NC Not Connected 3 VOLCAPB Bch nd Volume DC coupling 49 NC Not Connected 4 ExtSense AGC Boost Level for DBB 5 In5A Ach Input5 5 INT AGC Smoothing Filter for DBB 5 NC Not Connected 6 SurTC Filter for Sound Mode 5 In4A Ach Input4

3 ABSOLUTE MAXIMUM RATING (Ta=5 C) PARAMETER SYMBOL RATING UNIT Power Supply Voltage V.5 V Power Dissipation P D (Note) mw Maximum Input Voltage V IMAX ~ V (Note) V Operating Temperature Range Topr - ~ 75 C Storage Temperature Range Tstg -4 ~ 5 C (Note) EIA/JEDEC STANDARD Test board (76.x4.3x.6mm, layer, FR-4) mounting (Note) Don t put Input Voltage more than Power Supply Voltage. ELECTRICAL CHARACTERISTICS (Ta=5 C,V =9V, Rg=Ω, RL=47kΩ, Vin=Vrms, f=khz,stvol=db, all controls flat unless otherwise specified) PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT Operating Voltage V V Supply Current I DD No signal - 8 ma Reference Voltage V REF No signal V Volume Input Resistance R INVOL No signal kω Maximum Input Voltage V IM st Volume=-dB THD=%..4 - Vrms Maximum Output Voltage V OM THD=%..4 - Vrms Maximum Input Gain G VINMAX Input Gain=3dB Vin=5mVrms db Maximum Gain G VMAX - db Mute Level Mute st Volume = Mute nd Volume = Mute db Channel Balance G CB - db Total Harmonic Distortion THDN V O =.5Vrms, BW=4Hz-3kHz -..5 % Output Noise Voltage V NO Rg=Ω, Filter : A-Weighted - Output Noise Voltage Cross Talk V NO CT st Volume = Mute nd Volume=Mute Rg=Ω, Filter : A-Weighted Selected Input : Rg=Ω Unselected Input : Signal - - () - (3) -94 () - () dbv (uvrms) dbv (uvrms) db Channel Separation CS Rg=Ω db Tone Control (Ta=5 C,V =9V, Rg=Ω, RL=47kΩ, Vin=.Vrms, f=khz,all controls flat unless otherwise specified) PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT High Frequency Boost HF BST TREB=, f=khz db High Frequency Cut HF CUT TREB=, f=khz db Mid Frequency Boost MF BST MIDD=, f=khz db Mid Frequency Cut MF CUT MIDD=, f=khz db Low Frequency Boost LF BST BASS=, f=hz db Low Frequency Cut LF CUT BASS=, f=hz db 3

4 Sound mode Characteristics (Ta=5 C,V =9V, Rg=Ω, RL=47kΩ, Vin=.Vrms, f=khz,all controls flat unless otherwise specified) PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT SOUND MODE G Vm SOUNDMODE= Ain-Aout, f=khz db SOUND MODE G Vm SOUNDMODE= Ain-Aout, db SOUND MODE 3 G Vm3 SOUNDMODE= Ain-Aout db Sound Gain Characteristics (Ta=5 C,V =9V, Rg=Ω, RL=47kΩ, Vin=.Vrms, f=khz,all controls flat unless otherwise specified) PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT SOUND GAIN G VS SOUNDGAIN = SOUNDMODE= Ain-Aout, db SOUND GAIN G VS SOUNDGAIN = SOUNDMODE= Ain-Aout, db Dynamic Bass Boost Characteristics (Ta=5 C,V =9V, Rg=Ω, RL=47kΩ, Vin=.5Vrms, f=khz,all controls flat unless otherwise specified) PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT DBB Gain G VSDBB DBBGain=, (AB)in-Aout db DBB Gain G VSDBB DBBGain=, (AB)in-Aout db DBB Gain 3 G VSDBB3 DBBGain=, (AB)in-Aout db 4

5 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 4kΩ (Connected to 5V), Load capacitance pf (Connected to GND) FAST MODE : Pull up resistance 4kΩ (Connected to 5V), Load capacitance 5pF (Connected to GND) PARAMETER SYMBOL Standard mode Fast mode MIN. TYP. MAX. MIN. TYP. MAX. UNIT Low Level Input Voltage V IL V High Level Input Voltage V IH V Low level output voltage (3mA at SDA pin) V OL V Input current each I/O pin with an input voltage between.v DD and.9v DDmax I i µa 5

6 CHARACTERISTICS OF BUS LINES (SDA,SCL) FOR I C-BUS DEVICES PARAMETER SYMBOL Standard mode Fast mode 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 NOTE) 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 NOTE). Data hold time : t HD:DAT C b ; total capacitance of one bus line in pf. Please hold the Data Hold Time (t HD:DAT ) to 3ns or more to avoid status of unstable at SCL falling edge. The SDA block in the does not hold data. Add external data-delay-circuit of the SDA terminal, in case of not providing a hold time of at least 3nsec for the SDA in the master device. The time-consists of the data-delay-circuit of the SDA terminal are as follows. (a) Low level High level : (b) High level Low level : T LH R P *C D T HL R D *C D In addition, Schottky barrier diode (SBD) influences a Low level at the Acknowledge. Therefore choose the low forward voltage (Vf) as much as possible. V DD R P R P SCL MASTER SBD SDA R D C D 6

7 DEFINITION OF I C REGISTER 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 Hex MSB LSB - 88(h) CONTROL REGISTER TABLE The select address sets each function (Input Selector, Input Gain, st -Volume, Tone Control, nd -Volume, ealasurrond, Dynamic Bass Boost, Other Settings). The auto increment function cycles the select address as follows. H H H 3H 4H H <Write Mode> Select BIT Address D7 D6 D5 D4 D3 D D D H * INPUT SELECTOR INPUT GAIN ( to 3dB / dbstep) H * * st-vol ( to -55dB / dbstep, MUTE) H TREB ( to ±4dB/ dbstep) MIDD ( to ±4dB/ dbstep) 3H BASS ( to ±7.5dB/.5dBstep) nd-vol ( to -8dB / dbstep, MUTE) 4H * SOUND GAIN SOUND MODE (3 modes) DBB GAIN (3 levels) DBB SENSE (3 levels) *: Don t Care CONTROL REGISTER DEFAULT VALUE Control register default value is all. Select BIT Address D7 D6 D5 D4 D3 D D D H H H 3H 4H 7

8 INSTRUCTION CODE a) INPUT SELECTOR, INPUT GAIN SETTING Select BIT Address D7 D6 D5 D4 D3 D D D H * INPUT SELECTOR INPUT GAIN INPUT SELECTOR : INPUT to 5 (Single Ended), INPUT 6 (Single Ended/Differential), Mute INPUT GAIN : to 3 db (db/step) b) HI PATH FILTER SWITCH, st VOLUME Select BIT Address D7 D6 D5 D4 D3 D D D H * * st VOLUME st Volume : to -6 db (db/step), MUTE c) TREBLE, MIDDLE Select BIT Address D7 D6 D5 D4 D3 D D D H TREB MIDD TREB : to ±4dB/ dbstep MIDD : to ±4dB/ dbstep d) BASS, nd VOLUME Select BIT Address D7 D6 D5 D4 D3 D D D 3H BASS nd VOLUME BASS : to ±7.5dB/.5dBstep nd VOLUME : to -8dB/ dbstep, MUTE e) SOUND ENHANCEMENT, DYNAMIC BASS BOOST Select BIT Address D7 D6 D5 D4 D3 D D D SOUND 4H * SOUND MODE DBB GAIN DBB SENSE GAIN SOUND GAIN : Sound Gain has levels SOUND MODE : Sound mode has 3 types DBB GAIN : Dynamic Bass Boost Gain has 3 levels DBB SENSE : This means detect level of input signal. 8

9 INPUT SELECTOR (Select Address : H) H D6 D5 D4 INPUT INPUT INPUT 3 INPUT 4 INPUT 5 INPUT 6 (Single Ended) INPUT 6 (Differential) MUTE *: Default Value INPUT GAIN (Select Address : H) H Gain(dB) D3 D D D * *: Default Value 9

10 st VOLUME (Select Address : H) H Gain (db) D5 D4 D3 D D D MUTE *: Default Value

11 TREBLE (Select Address : H) H Gain(dB) D7 D6 D5 D * *: Default Value MIDDLE (Select Address : H) H Gain(dB) D3 D D D * *: Default Value

12 BASS (Select Address : 3H) 3H Gain(dB) D7 D6 D5 D * *: Default Value nd VOLUME (Select Address : 3H) 3H Gain(dB) D3 D D D * MUTE *: Default Value

13 SOUND GAIN (Select Address : 4H) 4H SOUND GAIN D6 Gain Lo* Gain Hi *: Default Value Sound Enhancement Mode (Select Address : 4H) SOUND MODE 4H D5 D4 OFF* ealatreble eala eala & ealatreble *: Default Value Dynamic Bass Boost Gain (Select Address : 4H) DBB GAIN 4H D3 D OFF* Gain Gain Gain 3 *: Default Value Dynamic Bass Boost Sense (Select Address : 4H) DBB SENSE 4H D D Sense * Sense Sense 3 Sense 4 *: Default Value 3

14 TERMINAL DESCRIPTION No. SYMBOL FUNCTION EQUIVALENT CIRCUIT VOLTAGE IN3A INA INA INB INB IN3B IN4B IN5B IN6B IN6A IN5A IN4A Ach Input3 Ach Input Ach Input Bch Input Bch Input Bch Input3 Bch Input4 Bch Input5 Bch Input6 Ach Input6 Ach Input5 Ach Input4 8.5k 3.5k V / MonOutA RecOutA BPF BPF3 OutA OutB RecOutB MonOutB Ach Monitor Output Ach Rec Output Filter for DBB Filter 3 for DBB Ach Output Bch Output Bch Rec Output Bch Monitor Output FB 5 V / 7 33 VOLInA VOLInB Ach st Volume Input Bch st Volume Input 9.3k V / 5.7k TONEHA TONEMA TONEBA TONEBB TONEMB TONEHB Ach Treble(Tone) Filter Ach Middle(Tone) Filter Ach Bass(Tone) Filter Bch Bass(Tone) Filter Bch Middle(Tone) Filter Bch Treble(Tone) Filter 4k (PIN.8,3) 5.4k (PIN..3).7k (PIN..8) V / 4

15 TERMINAL DESCRIPTION No. SYMBOL FUNCTION EQUIVALENT CIRCUIT VOLTAGE TONEMA TONEBA TONEBB TONEMB Ach Middle(Tone) Filter Ach Bass(Tone) Filter Bch Bass(Tone) Filter Bch Middle(Tone) Filter V / 4 BPF Filter for DBB V / 6 3 VOLCAPA VOLCAPB Ach DC coupling for nd Volume Bch DC coupling for nd Volume 5 5.4k V / 8 GND ground - 5

16 TERMINAL DESCRIPTION No. SYMBOL FUNCTION EQUIVALENT CIRCUIT VOLTAGE VREG 5V V 9V 9 SDA SCL IC DATA IC CLOCK 4k - 8k SCL:GND SDA:ACK V Supply Voltage - V 4 ExtSense AGC Boost Level for DBB V / 5 36k.5u 5 INT AGC Smoothing Filter for DBB - k 5 6

17 TERMINAL DESCRIPTION No. SYMBOL FUNCTION EQUIVALENT CIRCUIT VOLTAGE 6 SurTC Filter for Sound Mode V / FB 6k k 7 SRFil Filter for Sound Mode V / FB 6k 6k k 45 VREF Reference Voltage V / k 63k 46 IN6Diff Negative Input for Input6 V / 37k 7

18 TEST Circuit INPUT(Bch) C3 C3 C3 C9 C7 C6 C5 C4 C3 C 4.7n 4.7n n 47n n 4.7n u u C4 5 INPUT(Ach) 4.7k 4.7k 4.7k 4.7k Filter terminal for Sound Mode INPUT4 Bch INPUT5 Bch INPUT6 Bch VREF INPUT6 Dif f INPUT6 Ach INPUT5 Ach to 3dB db step db 5k 5k stvolume ( to -6dB,Mute db step) TRE MID Sound Mode & DynamicBassBoost BAS ndvolume ( to -8dB,Mute db step) I C SCL SDA C8 C7 R8 R7 C5 C4 AGC Smoothing Filter for Dynamic Bass Boost OUTPUT(Bch) GND V C6 OUTPUT(Ach) 5 5 db TRE 4.7n MID 4.7n n BAS n n C.u 4 INPUT3 Ach R3 C C C3 C6 C7 R4 k 47k 5n C3 C8 C9 C INPUT3 Bch INPUT Bch INPUT Bch C33 C34 C35 C36 C37 C38 C39 INPUT4 Ach INPUT Ach INPUT Ach R6 R R Low PassFilter terminal for Dynamic Bass Boost 68n C MonOut Ach RecOut Ach VOLIn Ach BPF C4 MonOut Ach RecOut Ach VOLIn Ach C Filter terminal for Sound Mode ExtSense terminal. 8

19 Application Circuit INPUT(Bch) C3 C3 C3 C7 C6 C5 C4 C3 C R 4.7n 4.7n n 47n n 4.7n u 3k u INPUT(Ach) 4.7k 4.7k 4.7k 4.7k Filter terminal for Sound Mode 4 4 db TRE MID BAS 6 5 Filter terminal for Sound Mode AGC Smoothing Filter for Dynamic Bass Boost INPUT5 Bch INPUT6 Bch VREF INPUT6 Diff INPUT6 Ach INPUT5 Ach to 3dB db step 5k 5k stvolume ( to -6dB,Mute db step) Sound Mode & DynamicBassBoost ndvolume ( to -8dB,Mute db step) I C SCL SDA C8 C7 R8 R7 C5 C4 OUTPUT(Bch) GND V C6 OUTPUT(Ach) R 4.7n 4.7n n 47n n C ExtSense terminal. Possible to unconnect db TRE MID BAS C C C3 C6 C7 C8 C9 C 4 C n INPUT3 Ach INPUT Ach R6 75k R4 5.6k R5.k R3 C4 n C3 C5 INPUT3 Bch INPUT Bch INPUT Bch INPUT4 Bch C33 Band PassFilter terminal for Dynamic Bass Boost C34 C35 C36 C37 C38 C39 INPUT4 Ach C4 INPUT Ach C9 C8 R R 68n C C R9 C9 9

20 APPLICATION NOTE [] Input Selector (-) Single ended stereo Inputs All single ended inputs (pin.,3,4,36,37,38,4,4,44,47,5,5) have an input impedance of Ω. (-) Differential Input In6A(pin.47)/In6B(pin.44) can use as single-ended input or differential input. In case of differential input, In6A/In6B are positive input have an input impedance of Ω. And In6diff(pin.46) is negative input terminal has an input impedance of Ω. To improve CMRR at input, please connect the same value of coupling capacitor to In6A/In6B/In6diff. [] Monitor out(pin.5,35), Rec out(pin6,34), VOLIn(pin.7,33) Hi-path filter (Sallen-Key) can be made up with these terminals. =6.5k f = π R R C C CC Q = C C R R R C C MonitorOut(PIN:5,35) RecOut(PIN:6,34) R VOLIn(PIN:7,33) C C

21 APPLICATION NOTE [3] TONE control (a)bass (a-)boost (a-)cut IN OUT IN OUT R R TONE-B(PIN:,8) TONE-B(PIN:,9) TONE-B(PIN:,9) TONE-B(PIN:,8) C C C C R3 R3 f = π ( R ) R3 C C (Hz) Q = G ( R ) R3 C C C R3 = ± Log ( C C) ( R R3) C R3 C C R3 ( C C) (db) Table.a- : Internal resistance in each Gain. Gain R ±7.5dB 48.3kΩ.7kΩ ±5dB 45.8kΩ 4.kΩ ±.5dB 4.5kΩ 7.5kΩ ±db 38.kΩ.9kΩ ±7.5dB 3.kΩ 7.8kΩ ±5dB 4.4kΩ 5.6kΩ ±.5dB 3.9kΩ 36.kΩ ±db Ω Ω

22 (b)middle (b-)boost (b-)cut IN OUT IN OUT R R TONE-M(PIN:,3) TONE-M(PIN:9,3) TONE-M(PIN:,3) TONE-M(PIN:9,3) C C C C R3 R3 f = π ( R ) R3 C C (Hz) Q = G ( R ) R3 C C C R3 = ± Log ( C C) ( R R3) C R3 C C R3 ( C C) (db) Table.a- : Internal resistance in each Gain. Gain R ±4dB 44.6kΩ 5.4kΩ ±db 4.7kΩ 8.3kΩ ±db 38.kΩ.9kΩ ±8dB 33.6kΩ 6.4kΩ ±6dB 7.8kΩ.kΩ ±4dB.6kΩ 9.4kΩ ±db.5kω 38.5kΩ ±db Ω Ω

23 (c)treble (c-)boost (c-)cut IN OUT IN OUT R R TONE-H(PIN:8,3) TONE-H(PIN:8,3) C C G V = ± Log R ( ( )) / π f C (db) Table.a- : Internal resistance in each Gain. Gain R ±4dB kω 4kΩ ±db.kω 5.8kΩ ±db 8.4kΩ 7.6kΩ ±8dB 6.kΩ 9.9kΩ ±6dB 3.3kΩ.7kΩ ±4dB 9.8kΩ 6.kΩ ±db 5.5kΩ.5kΩ ±db Ω 6kΩ 3

24 APPLICATION NOTE [4] Sound Mode Filter terminal for Sound Mode SurTC (pin.6) C Sound-Intput Ach Sound-Output Ach A *Hi *Lo Sound Filter *ealarebirth *eala *ealarebirth & eala Sound-Intput Bch Sound-Output Bch SRFil (pin.7) C Filter terminal for Sound Mode There are 3 sound modes in NJWA. ) ealarebirth :This is a sound effect, this is suitable for compressed Audio. ) eala :This is a comfortable surround that makes much of sound location. 3) ealarebirth & eala :This is a sound effect that be suitable for various music. These sound modes have -level gain effects. Sound modes and -level gain are switched by IC command. And, Frequency effects of sound mode depends on C,C. Please choose your suitable value of C,C for Audio set. Recommendation is C=68nF, C=4.7nF. Frequency Response of Sound mode is shown in next page. Regarding Pop noise reduction when sound mode and sound gain switched doesn t cover about this. *Notice: About NJW Regarding Pop noise reduction when sound mode and sound gain switched, *Sound mode swtiched: Pop noise reduction is cared by capacitor pin.6 *Sound gain switched: Pop noise reduction is not cared 4

25 Gain vs Frequency (ealarebirth) V=9V, Vin(Ach)=.Vrms, Vo(Ach), Ta=5 o C C:Sweep, C=4.7nF Gain vs Frequency (ealarebirth) V=9V, Vin(Ach)=.Vrms, Vo(Ach), Ta=5 o C C:68nF, C=Sweep 47n,68n,n,5nF nf 6.8nF 5 5 Gain (db) -5 Frequency (Hz) -5 Frequency (Hz) Gain vs Frequency (eala) V=9V, Vin(Ach)=.Vrms, Vo(Ach), Ta=5 o C 5 Gain (db) -5 Frequency (Hz) Gain vs Frequency (ealaealarebirth) V=9V, Vin(Ach)=.Vrms, Vo(Ach), Ta=5 o C 5 Gain (db) Gain (db) 3.3nF 4.7nF Gain vs Frequency (eala) V=9V, Vin(Ach)=.Vrms, Vo(Ach), Ta=5 o C C:Sweep, C=4.7nF C:68nF, C=Sweep 5nF 5 nf 4.7nF Gain (db) 3.3nF 68nF 47nF nf 6.8nF -5 Frequency (Hz) Gain vs Frequency (ealaealarebirth) V=9V, Vin(Ach)=.Vrms, Vo(Ach), Ta=5 o C C:Sweep, C=4.7nF C:68nF, C=Sweep 5nF nf 4.7nF 3.3nF 5 Gain (db) 68nF 47nF nf 6.8nF -5 Frequency (Hz) -5 Frequency (Hz) 5

26 APPLICATION NOTE [5] Dynamic Bass Boost (DBB) 5-. Block diagram of DBB INT(pin.5) Sound-Intput Ach Sound-Output Ach AGC EXT Filter (inverting type) A 3-levels A=,.6,.33 Normally Gain= Sound-Intput Bch Sound-Output Bch BPF3(pin.5) BPF(pin.4) BPF(pin.3) Dynamic Bass Boost (DBB) is a system that changes boost gain by changing of input level. The boost gain has 3-levels, this is controlled by IC. AGC circuit changes the boost gain by detecting the input signal. 5-.Setting of EXT Filter The Frequency Response of DBB can be changed in EXT Filter. EXT Filter is composed of BPF(pin.3), BPF(pin.4), BPF3(pin.5). Below are examples of filter structure. a) BPF EXT Filter (inverting type) G V R3 = log R f c = πc ( R // R ) R 3 DC Cut BPF BPF C R3 BPF3:Output Q = R3 R // R R C 6

b) LPF (-6dB/Oct) EXT Filter (inverting type) G V R = log R 3 4 5 BPF R BPF BPF3:Output f = c πcr c) LPF (-db/oct) C EXT Filter (inverting type) G V R = log R 3 3 4 5 C BPF BPF R R3 BPF3:Output f c =

27 b) LPF (-6dB/Oct) EXT Filter (inverting type) G V R = log R BPF R BPF BPF3:Output f = c πcr c) LPF (-db/oct) C EXT Filter (inverting type) G V R = log R C BPF BPF R R3 BPF3:Output f c = π C C R R 3 C 5-3. DBB INT external Capacitor connected to pin.5 decides Attack/Recovery time of DBB. Recovery time (s) =.5 X C(uF) (test condition : Vin(AchBch)=Vrms, Sense Level = 4 ) Recovery time (C=F) Vin=.Vrms f=7hz 7

28 5-4. Detective level in DBB Detective level of input signal in DBB is control by IC or external resistor (Rsense:pin.4). In case of without external resistor, Detective level is shown in below Fig5-4-, Fig5-4- is Output Voltage vs Input Voltage when detective level is changed (Gain setting = 3). Fig5-4- is Output Voltage vs Input Voltage when Gain setting is changed (Sense level = 4). These figures don t include the external Resistor (Rsense:pin.4). Output vs Input Voltage (DBB SenseLevel sw eep) V=9V, DBB=GAIN3, Vin(ABch), f=7hz Output vs Input Voltage (DBB GainLevel sw eep) V=9V, Sense=Sense4, Vin(ABch), f=7hz Vout=Ach, Ta=5 o C Vout=Ach, Ta=5 o C Sense Output Voltage (Vrms).. Sense Sense4 Sense3 Output Voltage (Vrms).. Gain3 Gain Gain.... Input Voltage (Vrms).... Input Voltage (Vrms) Regarding Detective Level (sense level), internal resistance is switched by IC. This resistance decides detective level.. Sense = 36kΩ. Sense = 9kΩ 3. Sense 3 = 5.kΩ 4. Sense 4 = 3.6kΩ And, if connect the external resistor (Rsense:pin.4), Detected level is shown in below equations.. Sense = 36kΩ // Rsense. Sense = 9kΩ // Rsense 3. Sense 3 = 5.kΩ // Rsense 4. Sense 4 = 3.6kΩ // Rsense 8

29 APPLICATION NOTE [6] nd Volume nd Volume range is db to 8dB with db steps. Frequency response of nd Volume depends on capacitor connected to VOLCAP(pin.6,3). It shows frequency response of nd Volume in Fing.6-( nd Volume=-8dB), Fig6-( nd Volume=MUTE). To flat the frequency response, please choose bigger capacitor. Gain vs Frequency (nd Volume) V=9V, ndvol=-8db, Vin=Vrms, Ta=5 o C Gain vs Frequency (nd Volume) V=9V, ndvol=mute, Vin=Vrms, Ta=5 o C - - ndvol=mute C=uF ndvol=mute C=F - -4 ndvol=mute C=uF Gain (db) -3-4 ndvol=mute C=uF Gain (db) -6-8 ndvol=mute C=F ndvol=mute C=uF -5 - st&ndvol=mute -6 Frequency (Hz) - Frequency (Hz) Fig.6- Fig.6- But, when power turns on, it takes some charge time to VOLCAP(pin.6.3) If nd Volume is switched on charge, Pop noise occurs. The cause of pop noise is gap of Voltage between Vref and VOLCAP. To be fast the charge time, connect smaller capacitor to VOLCAP. DC Voltage vs time (nd Volume) V= ---> 9V, Ta=5 o C DC Voltage vs time (nd Volume) V= ---> 9V, Ta=5oC DC Voltage vs time (nd Volume) V= ---> 9V, Ta=5oC VOLCAP=uF 7 VOLCAP=F 7 VOLCAP=uF DC Voltage (V) Vref Vdc at VOLCAP DC Voltage (V) Vref Vdc at VOLCAP DC Voltage (V) Vref Vdc at VOLCAP time (s) time (s) time (s) Fig.6-3.VOLCAP=uF Fig.6-4.VOLCAP=F Fig.6-4.VOLCAP=uF 9

30 [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. 3

9-Input, 3-Output Stereo Audio Selector

9-Input, 3-Output Stereo Audio Selector 9-Input 3-Output Stereo Audio Selector! GENERAL DESCRIPTION! PACKAGE OUTLINE NJW is a 9-input 3-output stereo audio selector. It includes three independent 9input-output stereo audio selectors and adjustable