AN7376S

ICs for Cassette, Cassette Deck AN7374K, AN7376S Dolby* B/C Type Noise Reduction IC AN7374K Unit : mm 0.5±0.1 4.8±0.25 0.3 + 0.1 – 0.05 s Features • Fewer external parts • Spectral skewing circuit and anti-saturation circuit built• • in. Available for double deck (Through signal output to REC output at PB mode.) Available for ±2 or 1 power supply 26.7±0.3 The AN7374K, AN7376S are 2-ch dolby B/C type noise reduction ICs. Filter circuits (MPX filter driver and spectral skewing, etc.) are incorporated in 28-pin package. It can configure with very few external parts. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 8.4±0.3 28 27 26 25 24 23 22 21 20 19 18 17 16 15 1.05±0.25 3.05±0.25 * Dolby is the trademark of Dolby Laboratories Licensing Cor-poration. 3 ~15˚ 10.16±0.25 28-Lead Shrunk DIP Package (SDIP028-P-0400A) AN7376S 0.4±0.25 0.45 0.1±0.1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 0.3 7.2±0.3 9.4±0.3 s Block Diagram VCC 28 27 26 25 24 23 22 21 20 19 28-Lead SOP Package (SOP028-P-0375A) 18 17 16 15 Line Mpx–Dr VREF Stab VCR–H Rect–H VCR–L OS–H Rect–L OS–L AS + Buff. Bias Switch Logic Buff. SS + SS + AS + OS–H Mpx–Dr VREF IREF Line 1 GND 2 3 4 5 6 7 8 9 10 VCR–H Rect–H VCR–L OS–L Rect–L 11 12 13 14 0.925 0.15 2.0±0.2 17.81±0.3 1.27 1.778 Unit : mm 0.9±0.25 s Overview AN7374K, AN7376S s Absolute Maximum Ratings (Ta=25˚C) Parameter Supply Voltage Supply Current Power Dissipation Operating Ambient Temperature Storage Temperature Symbol VCC ICC PD Topr Tstg ICs for Cassette, Cassette Deck Rating 13.5 22 300 –30 ~ + 80 –55 ~ + 150 Unit V mA mW ˚C ˚C s Recommended Operating Range (Ta= 25˚C) Parameter Operating Supply Voltage Range AN7374K AN7376S Symbol VCC Range 9V ~ 13V or ± 4.5V ~ ±6.5V 7V ~ 13V or ± 3.5V ~ ±6.5V s Electrical Characteristics (Ta=25˚C, VCC =12V, In the Dolby Reference Level ; 388mVrms (= – 6dBm) REC – OUT) Parameter Quiescent Current Rec.– IN to Rec.– OUT Gain PB – IN to Rec.– OUT Gain MPX ON/OFF Gain Difference LINE – OUT Output Level AN7374K AN7376S 1 B Type Encode · Boost 2 3 4 1 2 C Type Encode · Boost 3 4 5 Signal · Handling Distortion SN Ratio Rec.→PB Crosstalk PB→Rec. Ch.→Ch. Mode Switching Offset Channel Balance PB Mode Control Voltage Rec. PBmpx C NR Control Voltage B off AN7374K AN7376S off C Symbol ICQ Grin Gpin DGmpx Vlout B–R–1 B–R–2 B–R–3 B–R–4 C–R–1 C–R–2 C–R–3 C–R–4 C–R–5 VOmax. THDoff THD – C S/N CT – R – P CT – P – R CT – C – C Voff D – GV VC – P VC – R VC – Pm VC – C VC – B VC – off Pin3 Applied Voltage Pin26 Applied Voltage Condition R/P R R P P→ Pm P R R R R R R R R R R R R R P R R R R NR off off off off off B B B B C C C C C off off C C off off off off →C off 1k 1k 1k 1k 1k 1k 1k 10k 5k 1k 10k 1k 5k 300 5k 15k 1k 1k 1k f(Hz) Others No signal Vin = 0dB Vin = 0dB Vin = 0dB Vin = 0dB Vin = – 40dB Vin = – 30dB Vin = – 25dB Vin = 0dB Vin = – 60dB Vin = – 40dB Vin = – 30dB Vin = – 25dB Vin = 0dB THD VCC = 9.0V = 1% VCC = 7.0V Vin = 0dB Vin = 0dB Rg = 5.1kΩ CCIR/ARM Vin = 0dB Vin = 0dB Vin = 0dB No signal 1k Vin = 0dB – 70 – 1.0 9.0 5.0 – 0.5 9.0 5.0 – 0.5 min. 12 17 22 –1 500 330 9.4 6.7 4.2 – 1.1 18.1 11.5 8.7 3.5 – 8.3 12 12 typ. 15 19 24 0 580 388 10.4 8.2 5.7 0.4 19.6 13.5 10.7 5.5 – 6.3 14 14 0.02 0.13 60.0 62.5 – 80 – 80 – 80 0 0 70 1.0 12.5 7.0 3.0 12.5 7.0 3.0 max. 19 21 26 1 Unit mA dB dB dB 670 mVrms 450 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 % % dB dB dB dB mV dB V V V V V V 0.15 0.3 ICs for Cassette, Cassette Deck s Application Circuits AN7374K, AN7376S • For 1 Power Supply +VCC PB/Rec. Rec. In /PBmpx PB In 1µF + 27 26 25 24 MPX FIL 2.4kΩ 23 22 5.6kΩ 1µF 1500pF 21 20 19 Line Out 0.47µF Rec. Out 1µF + 28 1500pF 0.47µF 18 17 16 15 AN7374K 1 1µF 2 + 3 1µF 4 + 2.4kΩ PB In 5 6 7 22kΩ 8 9 10 1500pF 11 12 13 14 1500pF 0.47µF Rec. Out 0.47µF GND Rec. In off/B/C MPX FIL 5.6kΩ Line Out • For ±2 Power Supply +VCC PB/Rec. Rec. In /PBmpx PB In 1µF + 27 26 25 2.4kΩ MPX FIL 5.6kΩ GND Line Out 0.47µF 0.47µF 1500pF 24 23 22 21 20 19 1500pF 18 17 16 15 Rec. Out 1µF + 28 AN7374K 1 1µF –VCC 2 + 3 1µF 4 + 2.4kΩ PB In 5 6 7 22kΩ 8 9 10 1500pF 11 12 0.47µF 13 14 1500pF 0.47µF Rec. In off/B/C MPX FIL 5.6kΩ Line Out Rec. Out Note) When users use this product, licensing contract should be made between the Dolby Research Center. Details should be contacted with the following. Dolby Research Center. Tokyo Office (Far Eastan Continental Inc.) TEL : 03-3584-0039 AN7374K, AN7376S Current consumption 30 28 26 Current consumption (mA) 24 C type 10kHz + 10dB 22 20 18 16 14 12 10 7 8 9 10 11 12 C type Vin = 0 OFF 10kHz + 10dB B type Vin = 0 13 14 15 B type 10kHz + 10dB Encode Mode Ta = 25˚C VCC– Current consumption (mA) 30 28 26 24 ICs for Cassette, Cassette Deck Current consumption Decode Mode Ta = 25˚C C type 10kHz + 10dB 22 20 18 16 14 12 10 7 8 9 10 11 12 C type Vin = 0 OFF 10kHz + 10dB B type Vin = 0 13 14 15 VCC – Supply voltage (V) B type 10kHz + 10dB VCC – Supply voltage (V) B type encode characteristics 10 8 – 30 6 – 25 4 – 20 2 –5 0 100 200 500 1k 2k 5k 10k – 15 – 10 0 20k VCC = 12V – 40 – 35 16 Encode boost (dB) Encode boost (dB) 20 C type encode characteristics – 60 – 40 12 8 – 30 4 0 –4 100 200 500 1k 2k 0 5k – 20 – 10 VCC = 12V – 50 10k 20k Frequency (Hz) Frequency (Hz) NR OFF total harmonic distortion 5.0 2.0 Encode Mode VCC = 12V 1.0 0.5 0.2 0.1 0.05 0.02 0.01 –30 –20 –10 0 10 20 100Hz 1kHz 10kHz 5.0 B type total harmonic distortion 2.0 Encode Mode VCC = 12V 1.0 0.5 0.2 0.1 0.05 0.02 0.01 –30 –20 –10 0 10 20 100Hz 1kHz 10kHz Total Harmonic distortion (%) Total Harmonic distortion (%) Output level (dB) Output level (dB) C type total harmonic distortion 5.0 2.0 Total Harmonic distortion (%) 1.0 0.5 0.2 0.1 0.05 0.02 0.01 –30 –20 –10 0 100Hz 1kHz 10kHz 10 20 Signal handling (dB) Encode Mode VCC = 12V 26 24 22 20 18 16 14 12 10 8 6 7 8 Signal handling Encode Mode f = 1kHz THD = 1% NR OFF B type C type 9 10 11 12 13 14 15 Output level (dB) VCC – Supply voltage (V) ICs for Cassette, Cassette Deck Crosstalk PB Mode to Rec. Mode VCC = 12V 30kHz LPF – 20 Crosstalk (dB) – 40 – 60 – 80 – 100 100 200 500 1k 2k 5k 10k 20k C type B type NR OFF Crosstalk (dB) – 20 – 40 – 60 – 80 – 100 100 200 500 1k AN7374K, AN7376S Crosstalk Rec. Mode to PB Mode VCC = 12V 30kHz LPF C type B type NR OFF 2k 5k 10k 20k Frequency (Hz) Frequency (Hz) Crosstalk Rec. Mode ch to ch VCC = 12V 30kHz – 20 Crosstalk (dB) – 40 – 60 – 80 – 100 100 200 500 1k 2k 5k 10k 20k C type B type NR OFF Crosstalk (dB) LPF – 20 – 40 – 60 – 80 – 100 100 200 500 Crosstalk PB Mode ch to ch VCC = 12V 30kHz LPF C type B type NR OFF 1k 2k 5k 10k 20k Frequency (Hz) Frequency (Hz) S/N Total Gain PB IN to PB OUT (mode : PB, OFF) PB IN to Rec. OUT (mode : PB, OFF) Rec. IN to PB OUT (mode : Rec., OFF) Rec. IN to Rec. OUT (mode : Rec., OFF) 30 28 26 24 22 20 18 16 100 VCC = ± 6V 200 500 1k 2k 5k 10k 20k Frequency (Hz) 50 60 Rec. · C 100 CCIR/ARM 90 Rec. · OFF Rg = 5.1kΩ PB · B PB · C PB · OFF Total Gain (dB) S/N (dB) 80 70 Rec. · B 7 8 9 10 11 12 13 14 15 VCC – Supply voltage (V) NR control voltage threshold 20 Mode : NR OFF, B, C 18 16 Control voltage (V) C type 12 10 8 B type 6 4 2 0 7 8 9 10 11 NR OFF Control voltage (V) 14 18 16 14 20 NR control voltage threshold Mode : Rec., PBd, PBm PBd (direct) 12 10 8 Rec. (MPX ON) 6 4 2 PBm (MPX ON) 12 13 14 15 0 7 8 9 10 11 12 13 14 15 VCC – Supply voltage (V) VCC – Supply voltage (V) AN7374K, AN7376S s Pin Description Pin No. 1 Pin Name GND Input Impedance Pin Voltage 0 Pin Description Single Supply : Ground Pin ICs for Cassette, Cassette Deck Equivalent Circuit VCC 2, 27 Rec. IN 62kΩ VCC/2 200Ω Record Input Pin 62kΩ GND VCC 60kΩ 3 OFF/B/C 70kΩ VCC/2 C-type/B-type/NR OFF Changeover Switching Pin 10kΩ GND VCC 4, 25 PB IN 40kΩ VCC/2 200Ω Playback Input Pin 40kΩ GND VCC 5, 24 MPX OUT 70Ω VCC/2 MPX Drive Amp. Output Pin 70Ω GND VCC 6, 23 MPX IN ≈∞ VCC/2 MPX Gain Aux. Amp. Input Pin 70Ω GND ICs for Cassette, Cassette Deck s Pin Description (Cont.) Pin No. Pin Name Input Impedance Pin Voltage Pin Description AN7374K, AN7376S Equivalent Circuit VCC 7, 22 VREF ≈0 VCC/2 Reference Voltage Output Pin GND VCC 8 IREF ≈∞ 1.2V Internal Resistor Error Calibration Pin 70Ω 700Ω GND VCC 9, 20 LINE OUT 40 VCC/2 Playback Output Pin 40Ω GND VCC 10, 19 VCR H VCC/2 HLS Side Chain Control Resistor Pin 30Ω GND VCC 11, 18 RECT H 0.5V HLS Control Signal Smoothing Pin GND AN7374K, AN7376S s Pin Description (Cont.) Pin No. Pin Name Input Impedance Pin Voltage Pin Description ICs for Cassette, Cassette Deck Equivalent Circuit VCC 12, 17 VCR L VCC/2 LLS Side Chain Control Resistor Pin 30 GND VCC 13, 16 RECT L 0.5V LLS Control Signal Smoothing Pin GND VCC 14, 15 Rec. OUT 60Ω VCC/2 Record Output Pin 60Ω GND VCC 50k 21 VRIN 25kΩ VCC/2 Reference Voltage Input/Ripple Rejection Pin 50k GND VCC 60kΩ 26 PB/Rec. /PBmpx 70kΩ VCC/2 Playback/Record/Playback – mpx MODE Switching Pin 10kΩ GND 28 VCC Supply Voltage Pin