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HA12230 Dataheets PDF



Part Number HA12230
Manufacturers Hitachi Semiconductor
Logo Hitachi Semiconductor
Description Audio Signal Processor
Datasheet HA12230 DatasheetHA12230 Datasheet (PDF)

HA12230NT Audio Signal Processor for Cassette Deck ADE-207-322E (Z) 6th Edition Nov. 2000 Description HA12230NT is silicon monolithic bipolar IC providing PB equalizer, REC equalizer system and each electronic control switch in one chip. Functions • PB equalizer • REC equalizer × 2 channel × 2 channel • MS use Mixing Amp. • Each electronic control switch to change tape type and mute etc. • REC mute • REC head return switch • Line Amp. • Line mute Features • REC equalizer is very small number.

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HA12230NT Audio Signal Processor for Cassette Deck ADE-207-322E (Z) 6th Edition Nov. 2000 Description HA12230NT is silicon monolithic bipolar IC providing PB equalizer, REC equalizer system and each electronic control switch in one chip. Functions • PB equalizer • REC equalizer × 2 channel × 2 channel • MS use Mixing Amp. • Each electronic control switch to change tape type and mute etc. • REC mute • REC head return switch • Line Amp. • Line mute Features • REC equalizer is very small number of external parts, built-in 2 types of frequency characteristics • PB equalizer circuit built-in • REC/PB are possible with TYPE I/II • Controllable from direct micro-computer output • Available to reduce substrate-area because of high integration and small external parts HA12230NT Pin Description, Equivalent Circuit (VCC = 12 V, Ta = 25°C, No signal, The value in the table show typical value.) Pin No. 17 16 Pin Name VCC RECOUT(L) Note V = VCC V = VCC/2 VCC Equivalent Circuit Pin Description VCC pin REC-EQ output GND 15 10 1 30 RECOUT(R) MAOUT VREF REC-RETURN V = V’ = VCC/2 VCC MS Amp. output Reference REC return V pin 3, pin 29 I GND , 30 V 29 3 28 BIN(L) BIN(R) AIN(L) V = VCC/2 VCC PB B deck input PB A deck input PB-NF 4 11 AIN(R) MAI V = VCC/2 MAOUT 100 k V 45 k VCC/2 VCC MS Amp. input Rev.6, Nov. 2000, page 2 of 32 HA12230NT Pin Description, Equivalent Circuit (VCC = 12 V, Ta = 25°C, No signal, The value in the table show typical value.) (cont) Pin No. 23 Pin Name PBOUT(L) Note V = VCC/2 Equivalent Circuit VCC Pin Description PB output V GND 9 25 7 26 PBOUT(R) EQOUT(L) EQOUT(R) PB-EQ(L) V = VCC/2 VCC EQ output (120 µ) EQ output (70 µ) V EQOUT GND 6 13 PB-EQ(R) RECIN(R) V = VCC/2 VCC REC-EQ input 100 k VCC/2 18 24 8 19 RECIN(L) TAI(L) TAI(R) MUTE I = 20 µA I VCC Tape input Mode control input 22 k 100 k GND 20 21 22 A 120/70 A/B B I/II Rev.6, Nov. 2000, page 3 of 32 HA12230NT Pin Description, Equivalent Circuit (VCC = 12 V, Ta = 25°C, No signal, The value in the table show typical value.) (cont) Pin No. 12 Pin Name IREF Note V = 1.2 V Equivalent Circuit Pin Description Equalizer reference current input 2 27 GND PB-NF(L) PB-IN = Vref VCC GND pin PB EQ feed back PB-IN 180 7 330 k 5 14 PB-NF(R) RIP PBOUT = Vref VCC NAB output V GND Rev.6, Nov. 2000, page 4 of 32 Block Diagram PBOUT(L) RECIN(L) RECOUT(L) + REC Return PB-NF(L) PB-EQ(L) EQOUT(L) TAI(L) + B I/II A/B A120/70 MUTE 30 REC-EQ 120/70 − + 29 28 27 26 25 24 23 22 21 20 19 18 VCC 17 BIN(L) AIN(L) A Mute − + REC Return + − B LPF + − REC Return Mute 120/70 + − B A + − Vref GND BIN(R) 1 + 2 3 AIN(R) 4 5 6 7 8 9 10 11 12 MAI IREF TAI(R) PB-NF(R) PB-EQ(R) EQOUT(R) Rev.6, Nov. 2000, page 5 of 32 PBOUT(R) MAOUT HA12230NT RECIN(R) + 16 REC-EQ 13 + RIP 14 + 15 + RECOUT(R) Unit R : Ω C:F HA12230NT Parallel Data Format Pin No. 19 20 21 Pin Name MUTE A 120/70 A/B Lo MUTE OFF * B Return SW OFF REC Mute ON REC-EQ * TYPE I A/B A 120/70 Low Low High High B I/II Low High Low High Lo 120 µ 70 µ 120 µ 70 µ Mid 120 µ 120 µ 70 µ 70 µ Hi 120 µ 120 µ 70 µ 70 µ Mid — — A Return SW ON REC Mute ON — Hi MUTE ON * A Return SW ON REC Mute OFF REC-EQ * TYPE II 22 B I/II Note: PB-EQ 120/70 logic Rev.6, Nov. 2000, page 6 of 32 HA12230NT Functional Description Power Supply Voltage Range HA12230NT is designed to operate on single supply, shown by table 1. Table 1 Item Single Supply Operating Power Supply Voltage Power Supply Voltage Range 6.5 V to 15.0 V Reference Voltage These devices provide the reference voltage of half the supply voltage that is the signal grounds. As the peculiarity of these devices, the capacitor for the ripple filter is very small about 1/100 compared with their usual value. The block diagram is shown as figure 1. + − + − + − + − 17 VCC Line Amp. block MS mixing Amp. block Lch REC-EQ block Rch REC-EQ block PB-EQ block 1 14 2 + 1 µF + − Figure 1 The Block Diagram of Reference Supply Voltage Rev.6, Nov. 2000, page 7 of 32 HA12230NT Operating Mode Control HA12230NT provide fully electronic switching circuits. And each operating mode control is controlled by parallel data (DC voltage). Table 2 Pin No. 19, 20, 22 Threshold Voltage (Vth) Lo 0.0 to 0.5 Mid — Hi 2.4 to VCC Unit V Test Condition Input Pin Measure V 21 Note: 0.0 to 0.5 1.2 to 1.8 2.4 to VCC V 1. Each pins are on pulled down with 100 kΩ internal resistor. Therefore, it will be low-level when each pins are open. 2. Over shoot level and under shoot level of input signal must be the standardized. (High: VCC, Low: –0.2 V) Block Diagram Figure 2 shows the block diagram. As this IC is built-in REC return switch, the configuration system can be simple system using a few external component and the REC/PB head. About these logics, please look at the Parallel Data Format. REC-OUT(L) 16 2.2 µ 8.2 k + REC - EQ REC-IN(L) 18 0.47 µ 5.1 k + 30 B head BIN(L) AIN(L) A head Return SW 29 28 .


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