AN7354

ICs for Cassette, Cassette Deck AN7354SC Dolby* B/C-type Noise Reduction s Overview The AN7354SC is an IC for 2 ch. Dolby B/C-Type noise reduction process. It requires fewer external parts and incorporates the functions of line-output muting and level detection and the delay circuit. 0.45 Unit : mm 1 42 skewing circuit not requiring external parts • Line-output muting circuit built-in • PB input delay circuit built-in • Built-in level detection circuit for automatic level adjustment and level meter • ON/OFF of NR, B-/C-type, REC./PB, MPX and muting function, and Hi/Lo changeover of level detection gain, directly-controllable by microcomputer 0.1±0.1 1.0 21 22 2.0±0.2 REC. OUT 1500pF 0.47µF 24 + 23 9.5±0.3 11.5±0.3 * Dolby symbols are the trademarks of Dolby Laboratory Licensing Corporation. The use of this products requires the approval of Dolby Laboratories Licensing Corporation in advance. 42-Lead SSOP Package (SSOP042-P-0450) s Block Diagram VCC REC. IN PB IN 1500pF 5.6kΩ MPX 2.4kΩ REC. /PB MPX METER OFF/ 0dB ON /20dB + 2.2µF 0.1µF + 1µF + LINE OUT 100kΩ LEVEL METER OUT 1500pF 0.47µF 1µF + 42 41 1µF + 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 + 25 0.15 0.9 0.3 21.25±0.3 22 SS HLS LLS SS HLS LLS 15 16 17 0.47µF 18 + 19 0.47µF 20 + 21 LINE OUT 1500pF LEVEL METER OUT 1500pF REC. OUT s Features • Built-in spectral Delay Mute Rect Bias LOGIC Rect Delay Mute 1 + 1µF 2 22kΩ 3 + 1µF 4 5 6 7 2.4kΩ 8 9 10 11 + 12 0.1µF 13 + 1µF 14 MPX PB IN 1500pF 5.6kΩ NR C/B ON/ -type OFF Mute ON/OFF VEE REC. IN + 2.2µF 0.35±0.1 100kΩ AN7354SC s Absolute Maximum Ratings (Ta=25˚C) Parameter Supply Voltage Supply Current (Ta=75˚C) Power Dissipation (Ta=75˚C) Operating Ambient Temperature Storage Temperature Symbol VCC ICC (+) ICC (–) PD Topr Tstg ICs for Cassette, Cassette Deck Rating ±6.7 +22 –22 295 –20 ~ + 75 –55 ~ + 125 Unit V mA mW ˚C ˚C s Recommended Operating Range (Ta=25˚C) Parameter Operating Supply Voltage Range Symbol VCC Range ±4.5V ~ ±6.5V s Electrical Characteristics (VCC= ± 6V, Ta=25˚C ± 2˚C) Parameter Total Circuit Current Note 1) REC. – IN to REC. – OUT I/O Gain Note 2) PB – IN to REC. – OUT I/O Gain Note 3) MPX ON/OFF Gain Difference LINE – OUT Level B-type Encode Boost (1) B-type Encode Boost (2) B-type Encode Boost (3) B-type Encode Boost (4) C-type Encode Boost (1) C-type Encode Boost (2) C-type Encode Boost (3) C-type Encode Boost (4) C-type Encode Boost (5) Signal Handling Total Harmonics Distortion – off Total Harmonics Distortion – C Signal to Noise Ratio Mode Switch Offset Symbol ICC Grin Gpin DGmpx Vlout BR – 1 BR – 2 BR – 3 BR – 4 CR – 1 CR – 2 CR – 3 CR – 4 CR – 5 VOmax. THDO THDC S/N Vofs – R Condition REC., OFF, No input signals REC., OFF, f = 1kHz REC. – OUT Level 388mV PB, OFF, f = 1kHz REC. – OUT Level 388mV PB, OFF, f = 1kHz Gain difference from Gpin PB, OFF, f = 1kHz Vin = 0dB REC., B, f = 10kHz Vin = – 40dB REC., B, f = 5kHz Vin = – 30dB REC., B, f = 1kHz Vin = – 25dB REC., B, f = 10kHz Vin = 0dB REC., C, f = 1kHz Vin = – 60dB REC., C, f = 5kHz Vin = – 40dB REC., C, f = 300Hz Vin = – 30dB REC., C, f = 5kHz Vin = – 25dB REC., C, f = 15kHz Vin = 0dB REC., OFF, f = 1kHz VCC = ±4.5V THD = 1% REC., OFF, f = 1kHz Vin = 0dB REC., C, f = 1kHz Vin = 0dB REC., C, Rg = 5.1kΩ CCIR/ARM Weighted REC., OFF, → C switch, REC. – OUT potential fluctuation min. 12 17 22 –1 510 9.4 6.7 4.2 – 1.1 18.1 11.5 8.7 3.5 – 8.3 12 typ. 16 19 24 0 570 10.4 8.2 5.7 0.4 19.6 13.5 10.7 5.5 – 6.3 13 0.02 0.13 60.0 –70 62.5 0 70 0.15 0.3 max. 20 21 26 1 Unit mA dB dB dB 640 mVrms 11.9 9.7 7.2 1.9 21.6 15.5 12.7 7.5 – 4.3 dB dB dB dB dB dB dB dB dB dB % % dB mV Note 1) REC., OFF in the condition description, expresses that MODE is REC. and NR is OFF. The same for the following. Note 2) Obtain the input voltage of REC. – IN when the output voltage of REC. – OUT becomes 388mVrms. For this input voltage, the reference level in REC. is assumed 0dB. Note 3) Obtain the input voltage of PB. – IN when the output voltage of REC. – OUT becomes 388mVrms. For this input voltage, the reference level in PB is assumed 0dB. ICs for Cassette, Cassette Deck s Electrical Characteristics (Cont.) (VCC= ± 6V, Ta=25˚C ± 2˚C) Parameter Channel Balance Total Harmonics Distortion Line Out Line Mute Attenuation Line Mute Offset Level Meter Output (1) Note 4) Level Meter Output (2) Level Meter Output (3) Level Meter Output Offset Delay Output (1) Symbol CB THDP Gmut Vofs – M VDC (1) VDC (2) VDC (3) Vofs – L VPS (1) Condition Gain difference between channels, Grin and Gpin PB, OFF, f = 1kHz Vin = 0dB, LINE – OUT PB, OFF, Mute ON f = 1kHz, Vin = 0dB Mute OFF → ON switching, LINE – OUT potential fluctuation PB, OFF, LMG Normal f = 1kHz, Vin = – 3dB PB, OFF, LMG Normal f = 1kHz, Vin = +9dB PB, OFF, LMG High f = 1kHz, Vin = –18dB PB, OFF, LMG Normal No Input Vin = – 0.2V S30 → C PB MPX off Piny and Pin#7 DC Potential Vin = + 0.2V S30 → C PB MPX off Difference from VPS (1) Vin = – 0.2V S30 → B PB MPX off Piny and Pin#7 DC Potential Vin = + 0.2V S30 → B PB MPX off Difference from VPS (3) Vin = – 0.2V S30 → A PB MPX off Piny and Pin#7 DC Potential Vin = + 0.2V S30 → A PB MPX off Difference from VPS (5) min. –1 typ. 0 0.02 –85 –20 0.9 3.6 0.9 –15 2 0 1.0 4.0 1.0 0 3 AN7354SC max. 1 0.15 –75 20 1.1 4.4 1.1 15 4 Unit dB % dB mV V V V mV V Delay Output (2) VPS (2) 4 6 8 V Delay Output (3) VPS (3) – 0.1 0 0.1 V Delay Output (4) VPS (4) – 0.2 0 0.2 V Delay Output (5) VPS (5) –4 –3 –2 V Delay Output (6) Note 4) VPS (6) 4 6 8 V LMG in the condition description is an abbreviation of Level Meter Gain. AN7354SC ICs for Cassette, Cassette Deck s Electrical Characteristics (Ta=25˚C±2˚C) [Design Reference Values] The following characteristic values are reference values for design but not guaranteed values. Parameter Decreased Voltage Mute (1) Crosstalk, REC.– IN to LINE– OUT Crosstalk, PB– IN to REC.– OUT Crosstalk, Cannel to Cannel PB/REC. Control Voltage PB PB/REC. Control Voltage REC. MPX Control Voltage ON MPX Control Voltage OFF Meter Control Voltage Normal Meter Control Voltage Hi NR Control Voltage ON NR Control Voltage OFF B/C Control Voltage C B/C Control Voltage B Mute Control Voltage ON Mute Control Voltage OFF REC.– IN Input Resistance PB – IN Input Resistance Symbol Vmut (1) CT– RP CT– PR CT– CC VCPB VCREC. VCMon VCMoff VCMnor VCMhi VCON VCOFF VCC VCB VCMUon VCMUof Rin – RI Rin – PI Condition PB, OFF, Mute OFF, f=1kHz, Vin = 0dB Voltage between Pins1 and 42 when mute functions PB, OFF, f = 1kHz Vin = 0dB (At REC) PB, OFF, f = 1kHz Vin = 0dB (At PB) PB, OFF, f = 1kHz Vin = 0dB Pin35 applied DC voltage when PB, MPX are OFF Pin35 applied DC voltage when PB, MPX are ON Pin34 applied DC voltage when PB, MPX are ON Pin34 applied DC voltage when PB, MPX are OFF Pin33 applied DC voltage when Meter becomes Normal Pin33 applied DC voltage when Meter becomes Hi Pin8 applied DC voltage when NR is ON Pin8 applied DC voltage when NR is OFF Pin9 applied DC voltage for C-type NR Pin9 applied DC voltage for B-type NR Pin10 applied DC voltage when Mute is ON Pin10 applied DC voltage when Mute is OFF min. 4.4 typ. 6.4 –80 –80 –80 +2.5 –1.5 –1.5 +2.5 +2.5 –1.5 +2.5 –1.5 +2.5 –1.5 +2.5 –1.5 56.4 28.05 64 33 max. 8.4 –70 –70 –70 +6 +1.5 +1.5 +6 +6 +1.5 +6 +1.5 +6 +1.5 +6 +1.5 75.6 37.95 Unit V dB dB dB V V V V V V V V V V V V kΩ kΩ ICs for Cassette, Cassette Deck s Characteristics Curve Consumption Current 32 30 Consumption Current (mA) 28 26 24 22 20 18 16 14 12 ±4.5 ±5.0 ±5.5 ±6.0 ±6.5 C type 10kHz + 10dB B type 10kHz + 10dB Encode Mode Ta= 25˚C C type Vin = 0 OFF 10kHz + 10dB B type Vin = 0 32 30 Consumption Current (mA) 28 26 24 22 20 18 16 14 12 ±4.5 ±5.0 ±5.5 B type 10kHz + 10dB C type 10kHz + 10dB Decode Mode Ta= 25˚C AN7354SC Consumption Current C type Vin = 0 OFF 10kHz + 10dB B type Vin = 0 ±6.0 ±6.5 Supply Voltage VCC (V) Supply Voltage VCC (V) B – type Encode Characteristics 10 8 6 4 2 0 100 200 500 1k 2k 5k 10k –20dB –10dB 0dB 20k Ta= –30˚C Ta= 25˚C Ta= 80˚C VCC=12V –40dB Encode boost (dB) –30dB 20 16 12 8 4 0 –4 C – type Encode Characteristics –60dB –50dB –40dB –30dB –20dB –10dB Encode boost (dB) Ta = –30˚C Ta = 25˚C Ta = 80˚C VCC =12V 100 200 500 1k 2k 5k 0dB 10k 20k Frequency (Hz) Frequency (Hz) NR OFF Total Harmonics Distortion 5.0 Total Harmonics Distortion (%) 2.0 1.0 0.5 0.2 0.1 0.05 0.02 0.01 –30 –20 –10 0 10 20 Total Harmonics Distortion (%) Encode Mode VCC = ± 6V 100Hz 1kHz 10kHz 5.0 2.0 1.0 0.5 0.2 0.1 0.05 0.02 0.01 –30 B – type Total Harmonics Distortion Encode Mode VCC = ± 6V 100Hz 1kHz 10kHz –20 –10 0 10 20 Output Level (dB) Output Level (dB) C – type Total Harmonics Distortion 5.0 Total Harmonics Distortion (%) Encode Mode 2.0 VCC = ± 6V Signal Handling (dB) 1.0 0.5 0.2 0.1 0.05 0.02 0.01 –30 –20 –10 0 10 20 100Hz 1kHz 10kHz 26 24 22 20 18 16 14 12 10 8 6 ±4.5 Encode Mode f=1kHz THD=1% Signal Handling NR OFF B type C type ±5.0 ±5.5 ±6.0 ±6.5 Output Level (dB) Supply Voltage VCC (V) AN7354SC ICs for Cassette, Cassette Deck Crosstalk PB Mode to REC. Mode VCC = ± 6V 30kHz LPF –20 Crosstalk (dB) –40 –60 –80 –100 100 200 500 1k 2k 5k 10k 20k Crosstalk (dB) C type B type NR OFF –20 –40 –60 –80 –100 100 200 500 Crosstalk REC. Mode to PB Mode VCC = ± 6V 30kHz LPF C type B type NR OFF 1k 2k 5k 10k 20k Frequency (Hz) Frequency (Hz) Crosstalk REC. Mode to ch. to ch. VCC = ± 6V 30kHz LPF C type B type NR OFF Crosstalk PB Mode ch. to ch. VCC = ± 6V 30kHz LPF –20 Crosstalk (dB) –40 –60 –80 –100 –20 Crosstalk (dB) –40 –60 –80 –100 C type B type NR OFF 100 200 500 1k 2k 5k 10k 20k 100 200 500 1k 2k 5k 10k 20k Frequency (Hz) Frequency (Hz) Total Gain PB IN to PB OUT (Mode : PB OFF) PB IN to REC. OUT (Mode : REC. OFF) REC. IN to PB OUT (Mode : REC. OFF) Total Gain (dB) 30 28 26 24 22 20 18 VCC = ± 6V 16 100 200 500 60 50 REC. IN to REC. OUT (Mode : REC. OFF) S/N (dB) 80 70 90 100 CCIR/ARM Rg= 5.1kΩ S/N PB · B PB · C REC. · OFF PB. · OFF REC. · B REC. · C 1k 2k 5k 10k 20k ±4.5 ±5.0 ±5.5 ±6.0 ±6.5 Frequency (Hz) Supply Voltage VCC (V) Level Meter Characteristics 6 5 Output Voltage (V) 4 3 2 1 0 –40 Hi Gain Normal Gain 0 Output Level (dB) –10 –20 –30 –40 –50 Delay Circuit Characteristics 90 Phase (Degree) 0 –90 –60 V = 388mVrms (0dB) in –70 Mode : PB MPX ON VCC = ± 6V –30 –20 –10 0 10 100 200 500 1k 2k 5k 10k Input Level Vin (dB) Frequency (Hz) –180 20k ICs for Cassette, Cassette Deck s Pin Description Pin No. Pin Name Input Impedance Pin Voltage Pin Description AN7354SC Equivalent Circuit 1 VEE –6V Supply voltage (–) 42 VCC 6V Supply voltage (+) 40 GND 0V Ground neutral GND VCC 33 METER Nor/Hi 100kΩ 3.1V Level meter Normal/Hi changeover switch pin 500Ω 3kΩ 3kΩ 100kΩ –VCC VCC 34 MPX OFF/ON 100kΩ 3.1V MPX OFF/ON changeover switch pin 500Ω 20kΩ 20kΩ 100kΩ –VCC VCC 35 PB/REC. 100kΩ 3.1V PB –Mode/ REC.–Mode changeover switch pin 500Ω 3kΩ 3kΩ 100kΩ –VCC AN7354SC s Pin Description (Cont.) Pin No. Pin Name Input Impedance Pin Voltage Pin Description ICs for Cassette, Cassette Deck Equivalent Circuit VCC 100Ω 2 41 REC. IN 66kΩ neutral GND Record input pin 66kΩ 33kΩ GND –VCC VCC 3 IREF 7∞ –5V Internal resistor error calibration pin 100Ω 400Ω –VCC VCC 100Ω 4 39 PB – IN 33kΩ neutral GND Playback input pin 33kΩ –VCC VCC 100Ω 5 38 Delay 22kΩ neutral GND Delay circuit control pin 22kΩ 22kΩ –VCC VCC 6 37 MPX OUT 70Ω –45mV MPX drive amp. output pin 70Ω 1kΩ 1kΩ –VCC ICs for Cassette, Cassette Deck s Pin Description (Cont.) Pin No. Pin Name Input Impedance Pin Voltage Pin Description AN7354SC Equivalent Circuit VCC 500Ω 7 36 MPX IN 500Ω –30mV MPX gain aux. amp. input pin –VCC VCC 8 NR ON/OFF 100kΩ3.1V NR ON/OFF changeover switch pin 500Ω 100kΩ 23.6kΩ 23.6kΩ –VCC VCC 9 C/B-type 100kΩ3.1V C/B type changeover switch pin 500Ω 100kΩ 23.1kΩ 23.1kΩ –VCC VCC 10 Mute ON/OFF 100kΩ 3.1V Mute ON/OFF changeover switch pin 500Ω 100kΩ 3kΩ 3kΩ –VCC VCC 43Ω 7.35kΩ 11 32 LINE OUT 43Ω neutral GND Playback output pin 15kΩ –VCC AN7354SC s Pin Description (Cont.) Pin No. Pin Name Input Impedance Pin Voltage Pin Description ICs for Cassette, Cassette Deck Equivalent Circuit VCC 31Ω 500Ω 20kΩ 12 31 METER IN 20kΩ neutral GND Level meter input pin –VCC GND VCC 100Ω 500Ω 20kΩ 13 30 MUTE – IN 20kΩ neutral GND Mute input pin GND –VCC VCC 1kΩ 14 29 LEVEL 1kΩ neutral GND Level meter control pin 500Ω –VCC VCC 15 28 LINE MUTE OUT 63kΩ neutral GND Playback mute output pin 43Ω 63kΩ –VCC VCC 16 27 METER OUT 1kΩneutral GND Level meter output pin 1kΩ 5.5kΩ 4.7kΩ 1kΩ GND –VCC ICs for Cassette, Cassette Deck s Pin Description (Cont.) Pin No. Pin Name Input Impedance Pin Voltage Pin Description AN7354SC Equivalent Circuit VCC 17 26 VCR H Neutral GND HLS side chain control resistor pin 30Ω –VCC VCC 18 25 RECT H –5.45V HLS control signal smoothing pin 31Ω –VCC VCC 19 24 VCR L Neutral GND LLS side chain control resistor pin 30Ω –VCC VCC 20 23 RECT–L –5.45V LLS control signal smoothing pin 30Ω –VCC VCC 21 22 REC. OUT 56Ω neutral GND 56Ω Record output pin –VCC AN7354SC s Precautions on Product Handling and Mounting ICs for Cassette, Cassette Deck The AN7354SC Package is dry-sealed, because thermal stress at solder mounting may adversely affect the product reliability due to the moisture absorption in the resin. Take into consideration the following instructions for its use : 1. After unpacking the dry sealing package, in order to reduce absorption of the resin, store the product under temperature of 30˚C or lower and RH65% or less, and perform its mounting within 5 days following the unpacking, except when only lead section is heated by such as hand soldering. In addition, after unpacking, put the remainder back into the laminate bag and seal the bag with tapes or similars. Unless the silica gel in the bag discolors (blue to pink), its quality is guaranteed within 10 days. 2. If the product is stored under the conditions more than the above, pre-bake it (for 6 hours or more under 125˚C, or for 48 hours more under 70˚C) before mounting. 3. About soldering method (1) Solder dip method Solder dip must be performed under as low temperature as possible not exceeding 260˚C and for as short time as possible not exceeding 5s. (2) Reflow method ((Remarks)) 1 Peak temperature : 230˚C or lower 2 Peak time : 10s or shorter 3 Do not sharply rise the temperature from pre-heat temperature (150˚C or lower) to peak temperature (230˚C). 4 Reflow process must be performed only once. Hand soldering method When only leads are simultaneously heated, soldering must be performed under as low temperature as possible not exceeding 300˚C and for as short time as possible not exceeding 20s. For any soldering method, do not use the chlorine flux. If the chlorine flux is used, residual chlorine may adversely affect the product reliability. Thoroughly clean the IC after mounting. Any flux remaining after mounting results in lead corrosion, degrading the product reliability. In addition, if supersonic waves are used for cleaning, particular care must be taken, because resonance may occur depending on the size of IC and printed board. (3) (4)