HIT HA12207NT Datasheet

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HA12207NT

Audio Signal Processor for Cassette Deck

ADE-207-197B (Z)

3rd Edition Jun. 1999

Description

HA12207NT 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

Each electronic control switch to change REC/PB etc.

REC MUTE

REC head return switch

Features

REC equalizer is very small number of external parts, built-in 2 types of frequency characteristics.

PB equalizer circuit built-in.

REC /PB of high speed mode are possible with TYPE 1(Normal tape).

Controllable from direct micro-computer output.

Available to reduce substrate-area because of high integration and small external parts.

As the pins arrangement resembles HA12185NT, it can design the board that is replaced with HA12185NT.

HA12207NT

Pin Description, Equivalent Circuit (VCC = 10.5V, Vref = 5.6V, Ta = 25°C, No signal, The value in the table show typical value.)

Pin No.

Pin Name

Note

Equivalent Circuit

 

 

 

 

Pin Description

1

VCC

V = VCC

 

 

 

 

 

 

 

 

VCC pin

2

RECOUT (L)

V = Vref

 

 

 

 

 

 

 

VCC

REC-EQ output

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GND

 

 

 

 

 

 

 

 

 

 

 

 

3

RECOUT (R)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4

REC-RETURN V = Vref

 

 

 

 

VCC REC return

 

 

 

 

 

 

V ’= Vref

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

I

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

V

4

V’

 

 

 

 

5 pin, 6 pin

 

 

 

 

 

 

 

I

 

 

 

 

 

 

GND

 

5

PB-IN B (L)

 

 

 

 

PB B Deck input

6

PB-IN B (R)

 

 

 

 

 

7

VREF

V = Vref

 

 

 

Reference

 

 

V’ = VCC

/ 2

+ –

 

VCC

 

 

 

 

 

 

 

 

 

PB-IN

 

 

 

 

 

 

 

10k

 

 

 

 

 

V

 

V'

 

 

 

 

 

10k

 

 

 

 

 

 

 

GND

8

PB-IN A (L)

V = Vref

 

 

VCC

PB A deck input

V

9

PB-IN A (R)

 

 

Rev.3, Jun. 1999, page 2 of 27

HA12207NT

Pin Description, Equivalent Circuit (VCC = 10.5V, Vref = 5.6V, Ta = 25°C, No signal, The value in the table show typical value.)

Pin No.

Pin Name

Note

Equivalent Circuit

Pin Description

10

PB-NF (L)

PB-IN = Vref

VCC

PB EQ feed back

 

 

 

PB-IN

 

 

 

 

330k

 

 

 

 

180

 

 

 

 

7

 

11

PB-NF (R)

 

 

 

12

PB-EQ (L)

PBOUT = Vref

 

NAB output

 

 

 

PBOUT

 

 

 

 

GND

 

13

PB-EQ (R)

 

 

 

20

REC IN (R)

V = Vref

VCC

REC-EQ input

 

 

 

V

 

 

 

 

100k

 

 

 

 

Vref 7

 

21

REC IN (L)

 

 

 

14

PBOUT (R)

V = Vref

VCC

PB output

GND

15

PBOUT (L)

 

 

Rev.3, Jun. 1999, page 3 of 27

HA12207NT

Pin Description, Equivalent Circuit (VCC = 10.5V, Vref = 5.6V, Ta = 25°C, No signal, The value in the table show typical value.)

Pin No.

Pin Name

Note

Equivalent Circuit

 

 

 

 

Pin Description

16

A/B

I = 20 A

I

 

 

 

 

VCC

Mode control input

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

22k

100k

GND

17HSP

18MUTE

19

IREF

V = 1.9V

Equalizer

 

 

 

 

reference current

 

 

 

 

 

 

 

 

input

 

 

 

 

V

22

GND

GND pin

 

 

 

Rev.3, Jun. 1999, page 4 of 27

HIT HA12207NT Datasheet

HA12207NT

Block Diagram

CC

GND

 

 

 

 

 

 

 

 

: Ω : F

V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R C

 

 

 

 

 

 

 

 

 

 

Unit

 

 

 

 

 

 

0.01µ

 

 

 

 

 

 

 

 

 

 

0.01µ

 

 

 

 

 

 

)

PB-EQ

12

 

 

PB-NF

11

 

 

 

 

R

 

120µ

)

 

 

 

 

(

60µ

 

 

 

 

R

 

 

 

 

(

 

 

 

 

)

PB-EQ

13

 

 

PB-NF

10

 

 

 

 

L

 

+ –

 

 

 

 

 

(

 

)

 

 

 

 

 

L

 

 

 

 

 

(

 

 

 

R

PB-OUT

14

 

A

IN

9

 

 

)

 

)

 

 

(

 

 

 

 

 

 

 

 

 

 

R-ch

B

PB-

R

 

 

 

 

 

 

 

(

 

 

 

 

 

 

15

A

 

 

PB-OUT(L)

 

 

IN

8

 

 

 

 

 

-

)

 

 

 

 

 

 

 

 

 

PB

L

 

 

 

 

 

 

 

 

 

(

 

 

 

 

 

 

 

 

 

A

 

 

 

 

/B

 

16

 

 

 

VREF

470µ

 

 

 

 

 

 

 

7

 

 

 

 

 

 

 

 

 

 

 

+

 

 

HSP

17

 

L-ch

PB-IN

6

 

 

 

 

 

)

 

 

 

 

 

 

 

R

 

 

 

 

 

 

 

(

 

 

 

 

 

 

 

B

 

 

 

 

 

 

18

 

 

IN

5

 

 

 

 

 

 

 

 

 

-

)

 

 

 

 

 

 

 

 

 

PB

L

 

 

 

 

 

 

 

 

 

(

 

 

 

 

 

 

 

12dB

 

B

 

 

 

 

IREF

19

REC-EQ

REC-RETURN

4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

20

 

R-ch

 

3

 

 

 

REC-IN(R)

 

 

REC-OUT(R)

5.6k

Bias

 

 

 

 

 

 

 

 

REC-IN(L)

21

 

L-ch

REC-OUT(L)

2

5.6k

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

22

GND

 

CC

1

 

 

 

 

 

 

 

V

 

 

 

 

 

 

 

 

 

 

Rev.3, Jun. 1999, page 5 of 27

HA12207NT

Parallel Data Format

Pin No.

Pin Name

L

H

17

HSP

Normal *

Hi speed

 

 

 

 

16

A/B

Ain active *

Bin active

 

 

 

 

 

 

Return SW ON *

Return SW OFF

 

 

 

 

 

 

REC OUT active *

REC OUT HIZ

 

 

 

 

18

MUTE

MUTE ON *

MUTE OFF

 

 

 

 

Note: Unforced pin state

 

 

 

Rev.3, Jun. 1999, page 6 of 27

HA12207NT

Functional Description

Power Supply Range

HA12207NT is designed to operate on single supply, shown by table 1.

Table 1

Supply Voltage

 

Item

 

Power Supply Range

 

 

Single Supply

9.5V to 15.0V

 

 

 

Reference Voltage

As AC reference (Vref) of this IC has not a current drivability, Vref fluctuates by A/B switching of PB-EQ. Provided it causes you anxiety, please supply 7 pin with approximate 1/2 VCC voltage.

For example, a suitable circuit is shown by figure 1.

This IC has a capacitor charger for the Vref, indicated to the pin interface circuit figure.

VCC

1

Lch PB-EQ Reference voltage

Lch REC-EQ Reference voltage 470Ω

Rch REC-EQ Reference voltage

Rch PB-EQ Reference voltage

22

 

7

 

GND

Vref

 

 

 

 

+

 

 

470µ F

Figure 1 Reference Voltage Circuit

Rev.3, Jun. 1999, page 7 of 27

HA12207NT

Operating Mode Control

HA12207NT provides fully electronic switching circuits. And each operating mode control is controlled by parallel data (DC voltage).

Table 2 shows the control voltage of each control input pin.

Table 2

Control Voltage (Vth)

 

 

 

 

 

 

Pin No.

Lo

Hi

Unit

Test Condition

 

 

 

 

 

 

 

 

 

 

 

16, 17

0.0 to 1.0

4.0 to VCC

V

Input Pin

 

 

Measure

 

 

 

 

 

 

 

 

V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

18

0.0 to 3.0

4.0 to VCC

V

 

 

 

 

 

 

 

Note: 1. Each pin is pulled down with 100kΩ

internal resistor. 16 to 18 pins are low-level when each pin is

 

open.

 

 

 

 

 

 

 

2.Over shoot level and under shoot level of input signal must be the standardized. (High: Less than VCC, Low: More than –0.2V)

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.

As this IC adopted Hi-z SW of REC-EQ output and the input mute system, it realizes REC mute attenuation and pop-noise reduction securing in REC mute.

About these logics, please look at the Parallel Data Format.

B head

A head

Vref

RECOUT

 

 

REC IN

 

 

21

2

 

REC - EQ

Hi-Z SW

+

 

 

 

 

4

 

 

 

 

 

RETURN SW

 

 

5

B

 

 

PBOUT

PB IN(B)

 

 

 

+

 

 

 

 

15

 

A

 

8

 

 

 

 

 

 

 

 

 

PB IN(A)

 

 

 

 

7

 

 

 

 

 

10

 

13

Normal Speed

 

 

 

 

PB - A

Figure 2 Block Diagram (Lch)

Rev.3, Jun. 1999, page 8 of 27

HA12207NT

Level Block Diagram

The gain establishment of PB-EQ considers PB output level {(external AMP+PB AMP)=300mV(Dolby Level)} like figure 3 as the target.

Regarding REC-EQ adjust the gain in front of input to this IC.

The level diagram of 1kHz is shown figure 4. (Normal speed)

Similarly to PB, it consider Dolby level as a standard. And R1 needs the value more than 5.6k.

Because mode establishment resistances are built-in, REC-EQ frequency characteristics are respectively fixed value.

In case the change of the frequency characteristics are necessary, please inquire the responsible agent because the adjustment of resistors is necessary.

300mV (Dolby level)

HA12134A

63.6mV

0.6mV

40.5dB

20dB

PB-EQ

Dolby IC

Figure 3 PB Level Block Diagram (Normal Speed, 1kHz)

Rev.3, Jun. 1999, page 9 of 27

+ 18 hidden pages