ICs for Cassette, Cassette Deck AN7367K dbx II Noise Reduction IC for Cassette Deck ■ Overview 1.05±0.25 3.05±0.25 8.4±0.3 4.8±0.25 3 ~ 15˚ 10.16±0.25 0.3 + 0.1 5 – 0.0 28-Lead SDIP Package (SDIP028-P-0400A) ■ Block Diagram +VCC 28 27 26 25 24 23 22 21 20 19 18 17 –D+ 16 15 E O D +C– +E– – E OD F+ E ODEOD +A– – B+ B D E 1 GND L.S 2 3 4 5 6 7 8 9 10 11 0.9±0.25 28 27 26 25 24 23 22 21 20 19 18 17 16 15 1.778 26.7±0.3 ■ Features • Dynamic range : 110dB • 2-channel • Reference input-output signal level : 90mV • 2 power supply type (+, –) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 0.5±0.1 Unit : mm The AN7367K is an integrated circuit available for stereo operation on a single chip developed for dbx II type noise reduction, which can also use for U.S. sound multiplex TV. And it is designed for easy use of reference signal level, supply voltage and logic input level. 12 13 14 –VCC ICs for Cassette, Cassette Deck AN7367K ■ Absolute Maximum Ratings (Ta=25˚C) Symbol Rating Supply Voltage Parameter VCC ±7.2 Unit Supply Current ICC 30 mA Power Dissipation (Ta=75˚C) PD 450 mW Operating Ambient Temperature Topr –20 ~ + 75 ˚C Storage Temperature Tstg –55 ~ + 150 ˚C V ■ Recommended Operating Range (Ta=25˚C) Parameter Symbol Range Operating Supply Voltage Range VCC ± 5V ~ ±7V ■ Electrical Characteristics (VCC= ± 6V, Ta=25˚C ) Parameter AN7367K Symbol H4Condition Encode Output Voltage Encode Linearity –1 *1 VOE Vin = 1kHz, 90mV (Reference Level) LE – 1 Encode Linearity –2 *1 Decode Output Voltage Decode Linearity –1 *2 Decode Linearity –2 *2 Encode Max. Output Voltage min. typ. max. Unit 67.5 85 107 mV Vin = 1kHz, 900mV (Encode) 8 10 12 dB LE – 2 Vin = 1kHz, 0.9mV (Encode) – 22 – 20 – 18 dB VOD Vin = 1kHz, 90mV (Reference Level) 67.5 85 107 mV LD – 1 Vin = 1kHz, 285mV (Decode) 17 20 23 dB LD – 2 Vin = 1kHz, 9mV (Decode) – 43 – 40 – 37 VOME THD = 3%, f = 1kHz 300 1100 Decode Max. Output Voltage VOMD THD = 3%, f = 1kHz Encode Total Harmonic Distortion THDE At Encode, 400Hz ~ 30kHz, f = 1kHz, 90mV Decode Total Harmonic Distortion THDD At Decode, 400Hz ~ 30kHz, f = 1kHz, 90mV Encode Noise Output Voltage VNOE Input short, DIN/AUDIO Decode Noise Output Voltage VNOD Input short, DIN/AUDIO Encode Output Defference between Channels CDE Vin = 1kHz, 90mV Decode Output Difference between Channels CDD dB mV mV 0.35 0.45 % 0.1 0.3 % – 62 – 58 dBV – 96 – 92 dBV – 1.3 0 1.3 dB –2 0 2 dB – 52 – 45 dBV – 91 – 85 dBV mV Encode Crosstalk between Channels CTE Vin = 1kHz, 90mV At Encode *3, Vin = 1kHz, 900mV Decode Crosstalk between Channels CTD At Decode, Vin = 1kHz, 90mV Monitor Output Voltage VOM At Encode, Vin = 1kHz, 90mV 75 90 107 Monitor Output Voltage Output Difference Between Channels CDM At Encode, Vin = 1kHz, 90mV – 1.5 0 1.5 dB Monitor Output Noise Output Voltage VNOM Encode input, Short DIN/AUDIO – 110 – 106 dBV Monitor Output Total Harmonic Distortion THDM At Encode, Vin = 1kHz, 90mV 0.01 0.1 % dbx OFF Line Output Voltage VLOFF Vin = 1kHz, 180mV 151 180 214 mV dbx OFF Rec. Output Voltage VROFF Vin = 1kHz, 180mV 151 180 214 mV dbx OFF line Output Total Harmonic Distortion THDLOFF Vin = 1kHz, 180mV 0.01 0.1 % dbx OFF Rec Output Total Harmonic Distortion THDROFF Vin = 1kHz, 180mV 0.01 0.1 % dbx OFF Line Output Noise Output Voltage VNLOFF Input Short, DIN/AUDIO – 110 – 104 dBV dbx OFF Rec. Output Noise Output Voltage VNROFF Input Short, DIN/AUDIO – 110 104 dBV dbx OFF Line Output Output Difference between Channels CDLOFF Vin = 1kHz, 180mV – 1.5 0 1.5 dB dbx OFF Rec. Output Output Difference between Channels CDROFF Vin = 1kHz, 180mV – 1.5 0 1.5 Input Impedance ZIN Vin = 1kHz, 90mV 500 Total Circuit Current Itot Input Short at Encode *1 Level Ratio to VOE *2 Level Ratio to VOD *3 Measure output leak by short of measuring channel input and input to reverse channel. dB kΩ 12 16 mA ICs for Cassette, Cassette Deck AN7367K ■ Electrical Characteristics (Cont.) (VCC= ± 6V, Ta=25˚C) Parameter Symbol dbx ON/OFF Control dbx ON V15ON dbx ON/OFF Control dbxOFF V15OFF Encode/Decode Control Encode V16EN Encode/Decode Control Decode V16DE Condition min. typ. max. Satisfy specifications of the preceding page VOE ~ VNLOFF 3.2 –VEE Satisfy specifications of the preceding page + 0.4V VOE ~ VNLOFF dbx ON/OFF Control “L” Overflow Current I15L 3.2 Satisfy specifications of the preceding page VOE ~ VNLOFF –VEE Satisfy specifications of the preceding page + 0.4V VOE ~ VNLOFF V15=1.8V –2.1 Encode/Decode Control “L” Overflow Current I16L V16=1.8V Pulse Noise at Encode VNPE Input Short, Time : a second, number : one –2.1 V 1.8 V 6 V 1.8 V – 0.2 µA – 0.2 µA 13 mVP – P ■ Characteristics Curve Vout (dBV) –30 f = 10kHz –20 f=1kHz 1.6 f=10kHz 1.2 Vout –40 f=10kHz 0.8 –50 –60 – 60 – 60 2 –80 f=1kHz – 80 f = 1kHz 0.4 THD –100 Vout – 40 – 40 – 20 0 1 f = 1kHz 0 THD (%) VCC = ± 6V LPF = 30kHz HPF = 400Hz Din Audio – 62dBV Vout (dBV) –20 VCC = ± 6V LPF = 30kHz HPF = 400Hz 0 Din Audio – 98dBV THD (%) –10 Input/Output Characteristics (Playback Mode) 20 Input/Output Characteristics (Rec. Mode) THD Vin (dBV) –100 0 – 60 – 40 –20 0 Vin (dBV) Output Frequency Characteristics (Rec. Mode) Output Frequency Characteristics (Playback Mode) 8 Vout = 87.6mV = 0dB f = 1kHz 4 Vin = 90mV 6 4 Vout (dB) Vout (dB) 0 2 0 Vout = 85.6mV = 0dB f = 1kHz – 2 Vin = 90mV f ≥1kHz ··· LPF (30kHz) HPF (400Hz) –4 f <1kHz ··· HPF (400Hz) 10 100 –4 –8 – 12 1k 10k 100k 10 Frequency f (Hz) 100 1k 10k 100k Frequency f (Hz) ■ Pin Description Pin No. Pin Name 2 · 27 Recording Signal Input Typ. Waveform Description Equivalent Circuit 2 0V Pin for inputting signal Unit 6 27 + – ICs for Cassette, Cassette Deck AN7367K ■ Pin Description (Cont.) Pin No. 3 · 26 Pin Name Typ. Waveform Description Equivalent Circuit Emphasis + – 3 Emphasis amp. – side input pin 26 + – 4 · 25 Line Amp. Output 5 · 24 Emphasis Amp. Output 4 25 0V Line amp. output pin + – + – 0V + – Emphasis amp. output pin 5 24 6 · 23 Buffer Output 0V Buffer output pin 7 · 22 CCA Input 0V CCA input pin 8 · 21 CCA Output 0V CCA output pin 9 · 20 + – 6 23 7 22 8 21 + – CCA Amp. Input CCA amp. input pin 0V 9 20 10 · 19 Rec. Out Output 0V Rec. out output pin + – 10 19 ICs for Cassette, Cassette Deck AN7367K ■ Pin Description (Cont.) Pin No. Pin Name Typ. Waveform 11 · 18 Level Sensor Input –5.2V Description Equivalent Circuit Level sensor input pin 11 18 12 · Timing Capacitor –5.3V Level sensor smoothing pin 12 17 13 17 Timing Current Adjusting Pin Adjust the timing current by external variable resistance. 1kΩ 13 103µA 15 dbx ON/OFF Switching High– dbx ON Low– dbx OFF 15 3.7kΩ 103µA 16 16 Encode/ Decode Switching 1 GND 14 (–) Power Supply 28 (+) Power Supply High – Encode Low– Decode 3.7kΩ ICs for Cassette, Cassette Deck AN7367K ■ Precautions on Use 1) For the emphasis, RMS filter, and waiting C, R, use those resistors and capacitors which satisfy the following error ranges. (R ; ±2%, C ; ±5%) 2) For the timing capacitor, use a suitable one whose error is within ±5% and whose tan δ is small enough. The selected timing capacitor must also has excellent temperature characteristics. 3) Adjust the timing adjustment pin so that the level on both 1kΩ ends becomes 18.4mV. 4) If shortening of the power ON rise time is necessary, connect the timing capacitor as shown in the sketch below. 6V 12/17 + + 12/17 –6V Note) – 6V Remember to make the power impedance low enough. 5) Encode THD The product specification is based on the data confirmed by use of a band-pass filter (400Hz ~ 30kHz). The distortion rate in the secondary to quintic higher harmonics measured by a spectrum analyzer is about 0.16%. 6) When users use the AN7367K, contract should be made between the dbx Technology Licensing. dbx license and trademark should be contacted with the following. the U.S.A. : dbx Technology Licensing 433 California Street. Third Floor San Francisco, California 94104 Tel : 415-765-2801 Fax : 415-765-2141 Japan Office : dbx Technology Licensing Tel : 03-3378-0915 Fax : 03-3374-5191