HIT HA12230NT Datasheet

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 × 2 channel

• REC equalizer × 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. Pin Name Note Equivalent Circuit Pin Description

17 V

CC

16 RECOUT(L) V = VCC/2

V = V

CC

V

CC

GND

15 RECOUT(R)
10 MAOUT MS Amp. output
1VREF Reference
30 REC-RETURN V = V’ = VCC/2

VCC pin
REC-EQ output

REC return

V

CC

,

V30

pin 3, pin 29

I

GND

V

29 BIN(L) PB B deck input
3BIN(R)
28 AIN(L) V = VCC/2

V

CC

PB A deck input

PB-NF

4AIN(R)
11 MAI V = VCC/2

MAOUT

V

CC

MS Amp. input

100 k

V

45 k

VCC/2

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. Pin Name Note Equivalent Circuit Pin Description

23 PBOUT(L) V = V

/2

CC

V

V

CC

GND

9 PBOUT(R)
25 EQOUT(L) EQ output (120 µ)
7 EQOUT(R)
26 PB-EQ(L) V = VCC/2

V

CC

V

EQOUT

PB output

EQ output (70 µ)

GND

6 PB-EQ(R)
13 RECIN(R) V = VCC/2

100 k

VCC/2

V

CC

REC-EQ input

18 RECIN(L)
24 TAI(L) Tape input
8TAI(R)
19 MUTE I = 20 µA

22 k

100 k

V

I

CC

GND

Mode control input

20 A 120/70
21 A/B
22 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. Pin Name Note Equivalent Circuit Pin Description

12 IREF V = 1.2 V

2GND GND pin
27 PB-NF(L) PB-IN = Vref

V

CC

PB-IN

Equalizer
reference current
input

PB EQ feed back

5 PB-NF(R)
14 RIP PBOUT = Vref

180

V

330 k

7

V

CC

GND

NAB output

Rev.6, Nov. 2000, page 4 of 32

Block Diagram

HA12230NT

C : F

RECIN(L)PBOUT(L)

RECOUT(L)

+ + +

CC

V

MUTE

19 18 17 16

A120/70

A/B

B I/II

TAI(L)

REC-EQ

−

RECOUT(R)

Unit R : Ω

15

+

RIP

REC-EQ

+ +

IREF

RECIN(R)

MAI

MAOUT

−

+

LPF

−

−

+

+

+

Mute

+

TAI

(R)

PBOUT(R)

Mute

EQOUT

(R)

EQOUT(L)
PB-EQ(L)

PB-NF(L)

(L)

(L)

REC Return

30 29 28 27 26 25 24 23 22 21 20

AIN

BIN

120/70

−

+

A

B

REC Return

−

+

A

B

REC Return

PB-EQ

AIN

BIN

(R)

PB-NF

(R)

120/70

(R)

(R)

GND

Vref

1 2 3 4 5 6 7 8 9 10 11 12 13 14

Rev.6, Nov. 2000, page 5 of 32

HA12230NT

Parallel Data Format

Pin No. Pin Name Lo Mid Hi

19 MUTE MUTE OFF — MUTE ON
20 A 120/70 * — *
21 A/B B

Return SW OFF
REC Mute ON

22 B I/

Note: PB-EQ 120/70 logic

A 120

120/70 B IIII/II Lo Mid Hi

120120

Low Low 120 µ 120 µ 120 µ
Low High 70 µ 120 µ 120 µ
High Low 120 µ 70 µ 70 µ
High High 70 µ 70 µ 70 µ

II

REC-EQ *
TYPE I

A/BBBB

A
Return SW ON
REC Mute ON

—REC-EQ *

A
Return SW ON
REC Mute OFF

TYPE II

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 Operating Power Supply Voltage

Item Power Supply Voltage Range

Single Supply 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.

VCC17

14

2

+

1 µF

+

−

+

−

+

−

+

−

+

−

Line Amp. block

MS mixing Amp. block

Lch REC-EQ block

Rch REC-EQ block

PB-EQ block

1

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 Threshold Voltage (Vth)

Pin No. Lo Mid Hi Unit Test Condition

19, 20, 22 0.0 to 0.5 — 2.4 to V

CC

V

Input PinVMeasure

21 0.0 to 0.5 1.2 to 1.8 2.4 to V

CC

V

Note: 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 standardi ze d.
(High: V

, Low: –0.2 V)

CC

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-IN(L)

+

18

0.47 µ

5.1 k 5.1 k

25

EQOUT(L)

5.1 k

To 24

0.1 µ

B head

A head

8.2 k

REC-OUT(L)

+

2.2 µ

BIN(L)
AIN(L)

Vref

16

30

29

28

Return SW

B

+

−

A

180

REC - EQ

330 k

22 k

2627

120/70

15 k

Rev.6, Nov. 2000, page 8 of 32

0.01 µ
Unit R : Ω

C : F

Figure 2 Block Diagram (Lch)

HA12230NT

Level Diagram

The gain establishment of PB-EQ considers PB output level {(internal Line Amp. + PB Amp.) = 580 mV
(Dolby Level)} like figure 3 at the target.

After replace RA and RB with a half-fix volume, adjust level.
Regarding REC-EQ adjust the gain in front of input to this IC.
The level diagram of 1 kHz is shown figure 3.
Similarly to PB, it consider Dolby level as a stan dard. And R1 needs the value more than 5.6 kΩ.
Because mode establishment resistances are built-in, REC-EQ frequ e n cy characteristics are respectiv ely

fixed value.
In case the change of the frequency characteristics are necessary, please inquire the responsible agent

because the adjustment of resistors is necessary.

0.6 mV

PB-EQ

41.2 dB

68 mV

RA

RB

Line Amp.

25.7 dB

580 mV30 mV

Figure 3 PB System Level Diagram

Line Mute

HA12230NT is built-in with mute circuit to Line Amp.
A mute control does with High/Low of pin 19.
Reducing pop noise is so much better 10 kΩ to 22 kΩ resistor to pin 19 in series and 1 µF to 22 µF

capacitor.
A mute is not built-in when doing a power ON/OFF.
Please correspond to it, on the side of a set system.

Test Mode

Test mode becomes if it is resistor less than 10 kΩ of pin 12.
Please use resistor of 22 kΩ on the occasion of mount.

Rev.6, Nov. 2000, page 9 of 32

HA12230NT

Music Sensor Mixing Block

• Gain with TAI to MAOUT

Case of one-side input, gain with TAI to MAOUT is attenuations 6 dB.

GV = (L ⋅ R signal addition circuit) + (MS Amp. gain) + (TAI one-side input attenuations)

= 20 + 20log
≈ 24.2 (dB)

For a necessary case, please in series add CR to MAI terminal for gain regulation.

24

100 k + 45 k

TAI(L)

1 k

45 k

18.4 k

+ (−6)

+

23

PBOUT(L)

Mute

−

+

×1

L ⋅ R signal

−6dB

addition circuit

+

−

LPF

25 kHz

×1

TAI(R)

8

30 mVrms

Mute

1 k

Line Amp.

+

−

18.4 k

9

+

580 mVrms

20 dB

45 k

PBOUT(R)

Figure 4 Music Sensor Mixing Amp. Block Diagram

MS Amp.

+

−

100 k

MAI

11

10 MAOUT

Rev.6, Nov. 2000, page 10 of 32