ICs for Cassette, Cassette Deck AN7353S Record Equalizer Amp. for Stereo Cassette Deck ■ Overview Unit : mm • • • 0.3 15.3±0.3 24 23 22 21 20 19 18 17 16 15 14 13 7.2±0.3 9.4±0.3 2.0±0.2 1.27 characteristics and gain) in medium and high frequency band by DC control Volume for total gain adjustment built-in (±11dB) With pin for low frequency band boost Drive circuit for current output built-in 1 2 3 4 5 6 7 8 9 10 11 12 0.15 0.925 ■ Features • Fine adjustment of equalizer characteristics (frequency 0.1±0.1 0.4±0.25 0.45 The AN7353S is a bipolar IC developed as a record equalizer amp. of analogue cassette deck. Particularly in order to support the automatic adjustment, it incorporates various volume filter circuits and control functions. Also, it has realized great reduction of external parts required. 24-Lead SOP Package (SOP024-P-0375) ■ Block Diagram GND REC. IN (L) CM CH Boost (L) CF 24 23 22 21 20 19 Rec. EQ OUT (L) 18 L.P.F fm V– I GH V– I Q V– I fp V– I Gp V– I VR IN (L) 17 GT V– I Vout (L) Iout (L) VCC CL 16 15 14 13 10 11 12 Iout (R) NC CR V– I Conv. Amp. Amp. Input Sw. Q fp Q V– I fp V– I fm Gp GT (L) GH GT (R) Output Sw. VREF Ireg – Gp V– I Amp. L.P.F Rec. 1 2 –VCC REC. IN (R) 3 IN MUTE 4 CQ 5 Boost (R) fm V– I GH V– I 6 CP GT V– I 7 EQ OUT (R) 8 VR IN (R) Amp. V– I Conv.– 9 Vout (R) ICs for Cassette, Cassette Deck AN7353S ■ Absolute Maximum Ratings (Ta=25˚C) Parameter Symbol Rating VCC ±6.7 ICC (+) 26 ICC (–) 23 mA Power Dissipation PD 521 mW Operating Ambient Temperature Topr –25 ~ + 75 ˚C Storage Temperature Tstg –55 ~ + 125 ˚C Supply Voltage Supply Current Unit V mA ■ Recommended Operating Range (Ta= 25˚C) Parameter Symbol Range Operating Supply Voltage Range VCC ± 4.5V ~ ± 6.5V ■ Electrical Characteristics (VCC= ±6V, Ta=25±2˚C) Parameter Symbol Reference Output (EQ Output) VEQ Condition fin = 400Hz, Vin = –6dBv Medium/High Frequency Band Gain HIGH GHH LOW GHL fin = 10kHz, Vin = –12dBv, VEQ = 0dB High Frequency Band Peak Gain HIGH GPH Vin = –30dBv LOW High Frequency Band Peak WIDE Band Width (10kHz Output) NALLOW +1 3.5 5.5 7.5 –8.5 – 4.5 16 –6.5 18 7 9 11 20 fin = 10kHz, Vin = –18dBv, VEQ = 0dB 2 4.5 7 –2.5 0 +2.5 3.85 4.25 4.65 1 1.2 1.4 16.5 18.5 20.5 –5.5 –3.5 –1.5 0.3 0.8 0.3 0.8 GQL VfPH fin = 35kHz VfPL fin = 10kHz Volume Amp. Gain (VOL Output) HIGH GTH Vin = –18dBv LOW GTL VOL THD (RU) Vin = 0dBv Vin = –14dBv RLV = 10kΩ Vin = –14dBv RLV = 1kΩ Vin = –30dBv fin = 1kHz (VR Input) fin = 1kHz CULL THD (RC) VOL VO (RU) RLV = 10kΩ CULL VO (RC) RLV = 1kΩ Rg = 0Ω RLV = 1kΩ, DIN/AUDIO fin = 1kHz, 3p : OPEN Vin = – 6dBv fin = 1kHz, VCL = 0.3V Vin (VR) = 0dBv VN(RC) IM (EQ) OM (RU) Output Offset Voltage (EQ Output) Output Offset Current (CURR Output) Voff (EQ) Pulse Noise Current (CURR Output) VPN (RC) Voff (RC) Input Side VIM Output Side VOM Muting Control Voltage Consumption Current –1.5 GQW LOW Output Noise Voltage (CURR Output) Input Muting Attenuation (EQ Output) Output Muting Attenuation (VOL Output) max. Vin = –18dBv HIGH Maximum Output Voltage –4 typ. GPL High Frequency Band Peak Frequency Control Voltage Total Harmonics Distortion fin = 25kHz VEQ = 0dB min. Itot THD = 3% Rg = 0Ω RLV = 1kΩ RLV = 100kΩ Rg = 0Ω Pin3 threshold value voltage (Mute ON voltage) Pin13 threshold value voltage (Mute ON voltage) No signal Unit dBv dB dB dB V dB % 2.2 3.2 1 1.5 0.6 Vrms 2 mV · rms 40 dB 60 dB –900 +500 mV –25 +25 µA –9 +9 mVP–O 3.9 VCC GND 0.3 V 20 23 26 mA ICs for Cassette, Cassette Deck AN7353S ■ Pin Description Pin No. Pin No. Pin Name 1 Main Circuit –VCC Pin Name 13 Volume Amp. Gain (L ch.)/Output Mute Control 2 Record Amp. Input (R ch.) 14 Main Circuit +VCC 3 Record Amp. Input Mute Control 15 Record Amp. Current Output (L ch.) 4 High Frequency Band Peak Band Width Control 16 Record Amp. Voltage Output (L ch.) 5 Low Frequency Band Boost (R ch.) 17 Volume Amp. Input (L ch.) 6 High Frequency Band Peak Gain Control 18 Equalizer Amp. Output (L ch.) 7 Equalizer Amp. Output (R ch.) 19 High Frequency Band Peak Frequency Control 8 Volume Amp. Input (R ch.) 20 Low Frequency Band Boost (L ch.) 9 Record Amp. Voltage Output (R ch.) 21 Medium/High Frequency Band Gain Control 10 Record Amp. Current Output (R ch.) 22 Medium Frequency Band Cutoff Frequency Control 11 NC 23 Record Amp. Input (L ch.) 12 Volume Amp. Gain Control (R ch.) 24 GND 23 REC. IN (L) 22 21 CM CH Rec. 20 19 Boost (L) EQ OUT (L) CF L.P.F fm V– l GH V– l Q V– l fp V–l GP V– l 18 17 + 1kΩ 10kΩ 16 Vout (L) 100kΩ 15 lout (L) 10µF 10µF 33kΩ 33kΩ + VR IN (L) GT V– l + 10µF 24 10µF GND 0.47µF ■ Application Circuit 6V 14 13 CL +VCC V– l Conv. Amp. Amp. Input Sw. Q fp Q V– l fm fp V– l Gp GT (L) GH GT (R) Vref Ireg– Output Sw. Gp V– l Amp. 2 3 6V 10µF –VCC + CQ 4 Boost (R) 5 GH V– l CP 6 GT V– l EQ OUT (R) 7 8 VR IN (R) Amp. V– l Conv. Vout (R) 9 10µF 10kΩ + lout (R) NC CR 10 100kΩ + 1kΩ 11 12 10µF 1 0.47µF IN MUTE REC. IN (R) fm V– l 10µF L.P.F Rec.