HIT HA12179F Datasheet

HA12179F

Audio Signal Processer for Car Deck and Cassette Deck

(Dolby B-type NR with PB Amp)

ADE-207-136

1st Edition

Apr. 1994

Description

HA12179F is silicon monolithic bipolar IC providing Dolby noise reduction system*, line mute, music sensor and PB equalizer system in one chip.

Functions

• Line mute × 2 channel

• PB equalizer × 2 channel

• Dolby B-NR × 2 channel

• Music sensor × 1 channel

Features

• Different type of PB equalizer characteristics selection (normal/chrome or metal) is available with fully

electronic control switching built-in.

• Line mute ON/OFF is available.

• Changeable to Foward, Reverse-mode for PB head with f ully electronic control switching built-in.

• Available to change music sensing level by external resistor.

• Music sensing level selection is available with fully electronic control switching built-in.

• Available to change frequency response of music sensor.

• NR-ON/OFF and REC/PB fully electronic control switching built-in.

• Pin compatible of HA12163 series except for 4 and 39 Pins.

* Dolby is a trademark of Dolby Laboratories Licensing Corporation.

A license from Dolby Laboratories Licensing Co r por ation is required for the use of this IC.

HA12179F

Ordering Information

Package PB-OUT level REC OUT level Dolby level

HA12179F QFP 56 387.5 mVrms 300 mVrms 300 mVrms PB-OUT level above shown is typical value when adjusting Dolby level at Rec-out with NR-off mode.

Rev.1, Apr. 1994, page 2 of 40

Block Diagram

HA12179F

RECOUT (L)

PB OUT (L)

FFI

2930313233343536373839404142

NOI

MS VREF

MUTE

MS GND

DOLBY B-NR

MSV

To Microcomputer

MS GV

MSOUT

D GND

F/R

MUTE ON/OFF

120µ/70µ

REC/PB

NR ON/OFF

DET

RECOUT (R)

–

MS AMP.

FF NO

LPF

–

DOLBY B-NR

PBOUT (R)

MUTE

LINE OUT (L)

EQOUT (L)

RIP

120/70

–+

F/R

×1

VRER (L) 47

GND 49

GND

×1

VREF (R) 52

BIAS

F/R

–+

1234567891011121314

120/70

Rev.1, Apr. 1994, page 3 of 40

LINEOUT (R)

EQOUT (R)

HA12179F

Pin Discription (VCC = 9 V Single supply, Ta = 25°C, No signal, The value in the table

show typical value.)

Terminal

Pin No.

2 TAI 100 kΩ VCC/2 Tape input 41

5MUI Mute circuit input 38 25 MSI Music sensor

10 NR DET — 2.5 V Time constant

33 3 BIAS — 0.28 V

name Zin

DC voltage Equivalent circuit Description

VCC/2

rectifier input

pin for rectifier

Reference current input

GND

24 MS DET — V

40 RIP — VCC/2 Ripple filter

Rev.1, Apr. 1994, page 4 of 40

GND

Time constant pin for rectifier

HA12179F

Pin Discription (VCC = 9 V Single supply, Ta = 25°C, No signal, The value in the table

show typical value.) (cont)

Pin No.

Terminal name Zin

DC voltage Equivalent circuit Description

43 EQ OUT — VCC/2 Equalizer output 56

GND

6 PB OUT Play back 37 (Decode) output 30 MS V

REF

Reference voltage buffer output

26 MA OUT Music sensor

amp. output

47 V

REF

Reference

52 voltage buffer

output 12 REC OUT Recording 31 (Encode) output 4 LINE OUT Mute circuit 39 output 44 EQ OUT-M — VCC/2

Equalizer output

(Metal)

GND

Rev.1, Apr. 1994, page 5 of 40

HA12179F

Pin Discription (VCC = 9 V Single supply, Ta = 25°C, No signal, The value in the table

show typical value.) (cont)

Terminal

Pin No.

name Zin

21 MS OUT — —

DC voltage Equivalent circuit Description

MS V

Music sensor

output to MPU

D GND

22 V

23 MS V

—VCC— Power supply

20 D GND — 0.0 V — Digital (Logic)

ground 27 MS GND Music sensor

ground 49 GND Ground 50 48 FIN — VCC/2 PB-EQ input for 51 forward

46 RIN PB-EQ input for 53 reverse 45 NFI Negative 54 feedback

terminal of PB-

EQ amp. 28 NOI Negative

feedback input

for normal speed 29 FFI Negative

feedback input

for FF or REW

Rev.1, Apr. 1994, page 6 of 40

HA12179F

Pin Discription (VCC = 9 V Single supply, Ta = 25°C, No signal, The value in the table

show typical value.) (cont)

Terminal

Pin No.

14 ON/OFF 122 kΩ —

15 REC/PB 16 MUTE 17 120 µ/70 µ 18 F/R 19 MS GV 1NC No connection 7 8 9 11 13 32 34 35 36 42

name Zin

DC voltage Equivalent circuit Description

Mode control

input

22k

100k

D GND

GND

Absolute Maximum Ratings

Item Symbol Ratings Unit Note

Supply voltage VCC max 16 V Power dissipation P Operating temperature Topr –40 to +85 °C Storage temperature Tstg –55 to +125 °C Note: Operating voltage range is

VCC = 6.8 to 16.0 V

400 mW Ta ≤ 85 °C

Rev.1, Apr. 1994, page 7 of 40

HA12179F

Electrical Characteristics (Ta = 25 °C Dolby Level 300 mVrms, VCC = 9.0 V)

Item Symbol Min Typ Max Unit Test conditions Remark

Quiescent current I

Input amp. gain GvIA TAI 21.2 22.2 23.2 dB Vin = 0 dB, f = 1 kHz B-type encode ENC-2 k (1) 2.8 4.3 5.8 dB Vin = -20 dB, f = 2 kHz boost ENC-2 k (2) 7.0 8.5 10.0 Vin = -30 dB, f = 2 kHz

ENC-5 k (1) 1.7 3.2 4.7 Vin = -20 dB, f = 5 kHz

ENC-5 k (2) 6.7 8.2 9.7 Vin = -30 dB, f = 5 kHz Signal handling VO max 12.0 13.0 — dB THD = 1%, f = 1 kHz *1 Signal to noise ratio S/N 64.0 70.0 — dB Rg = 5.1 kΩ, CCIR/ARM THD THD — 0.05 0.3 % Vin = 0 dB, f = 1 kHz Channel CT RL (1) 65.0 80.0 — dB Vin = 0 dB, f = 1 kHz TAI IN separation CT RL (2) 50.0 60.0 — Vin = 0.6 mVrms, f = 1 kHz EQ IN Mute attenuation MUTE ATT 70.0 85.0 — Vin = 0 dB, f = 1 kHz TAI IN PB-EQ gain Gv EQ 1 k 37.0 40.0 43.0 dB Vin = 0.6 mVrms, f = 1 kHz 120 µ

Gv EQ 10 k (1) 33.0 36.0 39.0 Vin = 0.6 mVrms, f = 10 kHz

Gv EQ 10 k (2) 29.0 32.0 35.0 70 µ PB-EQ maximum

VoM 300 600 — mVrms THD = 1%, f = 1 kHz *1 output

PB-EQ THD THD-EQ — 0.05 0.3 % Vin = 0.6 mVrms, f = 1 kHz Noise voltage level

converted in input MS sensing level VON (1) –36.0 –32.0 –28.0 dB f = 5 kHz, Normal speed

VON (2) –18.0 –14.0 –10.0 f = 5 kHz, High speed MS output low level V MS output leak

current Control voltage V

Note: 1 VCC = 6.8 V

6.5 12.0 17.5 mA PB mode, NR-ON, 70µ, MUTE-OFF No signal

— 0.7 1.5 µVrms Rg = 680 Ω DIN-AUDIO

—1.01.5V —0.02.0µA

–0.2 — 1.0 V

3.5 — 5.3

Rev.1, Apr. 1994, page 8 of 40

Test Circuit

EQOUT (L)

R29

10 k

DC VM1

SW22

SW21

SW24

RECOUT (L)

LINEOUT (L)

EQOUT (L) SW23

DC Source1

OFF

R24

R27

330 k

RECOUT (L)

LINEOUT (L)

R28

18 k

330 k

R25

R26

)

C29 +

47 k

33 k

C14

100 µ

C15

0.01

C28

2.2 µ

A GND

C13

0.33 µ

4700P

C17

0.1µ

V MS

MSI MS MA

FFI NOI MS MS

N.C. REC

DET

OUT

GND

VRFE OUT

DET

QFP-56

(L)

Note:

The capacitor (29) should

be connected.

It's recommended to be

D GVD MS OUT

MS GV F/R

120 /

C33

PB MUTE

REC/

ON/

OFF

C32

N.C. (R)

REC

OUT

N.C.

DET

C10

(R)

connected close to the IC.

R23

3.9 k

SW1

SER REP

SW2

SW3

R19

10 k

120 µ 70 µ

SW5

SW4

MUTE

PB REC

SW6

C12

2.2 µ

1 µ

R17

22k

22 µ

0.1 µ

FOR REV

MUTE

OFF

OFF ON

DC Source2

MSOUT

RECOUT (R)

LINEOUT (R)

D GND

SW18

EQOUT (R)

SW19 SW20

EQOUT (R)

RECOUT (R)

LINEOUT (R)

R15

HA12179F

AC VM2

analyzer

Distortion

Oscillo scope

Noise meter

with CCIR/ARM filter

10 k

and DIN-Audio filter

R30

10 k

R33

TAI (L)

EQIR (L)

SW25

C23

0.47 µ

R34

5.1 k

R35

R38

R39

EQIF (L)

C19

5.1 k

330 k

180

R41

C27

2.2 µ +

680

22 µ

C25

R40

C24

R36

N.C. N.C. N.C. NR PB

OUT

C35

0.1µ (L)

MUI

OUT

C22

1µ

RIP LINE

(L)

SW27

42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 2243444546474849

N.C. TAI

0.1µ EQ

12 k

0.01µ 680

C26

OUT

OUT-M

R37 18 k

(L)

NFI

(L)

RIN

22 µ

(L)

VREF

(L)

GND FIN

N.C. N.C. N.C.

(L)

(R)

OUT

HA12179F (PB 1 CHIP)

MUI

(L)

OUT

LINE

TAI

(L)

OUT

(L)

OUT-M NFI

RIN

VREF FIN

(R)

BIAS (R)

N.C. (R)

(R)

GND

C34

SW26

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21

56555453525150

0.1 µ

18 k

0.01 µ

2.2 µ

R11

18 k

R10

TAI (R)

SW15

ON OFF

SW17

5.1 k

AC VM1 Audio SG

0.47 µ

0.1µ

5.1 k

5.1 k R5

330 k

12 k

180

680

22 µ

680

22 µ

EQIR (R)

EQIF (R)

SW16

R14

10 k

2. Capacitor tolerance are ±1%

3. Unit R: Ω C: F

Note: 1. Resistor tolerance are ±1%

Rev.1, Apr. 1994, page 9 of 40

HA12179F

Application Note

Power Supply Range

Table 1 Supply Voltage

HA12179F

Single supply 6.8 V to 16.0 V

HA12179F is designed to operate on single supply. Please consult to HITACHI sales engineers when it will use the split supply.

1. The lower limit of supply voltage depends on the line output reference level. The minimum value of the overload margin is specified as 12 dB by Dolby Laboratories.

2. In th e reverse-vo ltage conditions such as 'D-GND is higher than VCC' or 'D-GND is lower than GND',

excessive current flows into the D-GND to destroy this IC. To prevent such destructio n, pay attentio n to the followings on using.Therefore, Short-circuit the D-GND and GND directory on the board mounting this IC.

Reference Voltage

For the single supply operation this device provides 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 Reference voltage are provided for the left channel and the right channel separately. The block diagram is shown as figure 1.

49 50 40

GND

RIP C22 1µ

–

VREF (L)

L channel reference

Music sensor reference R channel reference

VREF (R)

MS VREF

Figure 1 The Block Diagram of Reference Voltage Supply

Rev.1, Apr. 1994, page 10 of 40

HA12179F

Operating Mode Control

HA12179F provides electronic switching circuits. And each operating mode control are controlled by parallel data (DC voltage).

Table 2 Threshold Voltage

Pin No. Lo Hi Unit Test condition

14 15 16 17 1819–0.2 to 1.0 3.5 to 5.3 V

Table 3 Switching Truth Table

Pin No. Lo Hi

14 NR-OFF NR-ON 15 PB REC 16 MUTE-OFF MUTE-ON 17 120 µ (NORMAL) 70 µ (METAL or CHROME) 18 FORWARD REVERSE 19 SER (FF or REV) REP (NORMAL SPEED) Notes: 1. Each pins are on pulled down with 100 kΩ internal resi stor .

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: 5.3 V, Low: –0.2 V)

3. Reducing pop noise is so much better for 10 kΩ to 22 kΩ resistor and 1 µF to 22 µF capacitor shown Fig 2. But the resistor connected to MUTE terminal (pin 16) should be under 10 kΩ.

)

Input Pin Measure

INPUT Pin 10 to 22kΩ

1 to 22µF

MPU

Figure 2 Interface for Reduction of Pop Noise

Rev.1, Apr. 1994, page 11 of 40

HA12179F

Input Block Diagram and Lev e l Diagram

R34

5.1k

R38 330k

R39 180

Note: The each level shown above is typical value when offering PBOUT level to PBOUT pin. (EQ AMP.)

Gv = 40 dB, f = 1 kHz

R35

5.1k R36

12k

R37 18k

C25

0.01µ

EQ OUT TAI

EQ OUT-M

EQ AMP.

NFI

RIN

VREF

FIN

– +

C24

0.1µ

30mVrms (–28.2dBs)

0.6mVrms (–62.2dBs)

HA12179F : 387.5mVrms (–6.0dBs)

PBOUT

INPUT AMP

–

NR circuit

RECOUT 300mVrms

(–8.2dBs)

Figure 3 Input Block Diagram

Adjustment of Playback Dolby Level

After replace R34 and R35 with a half-fix volume of 10 kΩ, adjust RECOUT level to be Dolby level with playback mode.

Note on Connecting with Tape Head to IC

This IC has no internal resistor to give the DC bias current to equalizer amp., therefore the DC bias current will give through the head. This IC provides the Vref buffer output pin for Rch and Lch separ ately (has two Vref terminal). In case of use that the Rch and Lch reference of head are connected commonly, please use one of Vref terminals of IC (47 pin or 52 pin) for head reference.

If both 47 pin and 52 pin of IC are connected, rush current give the great damage to IC. The application circuit is shown in figure 4.

Rev.1, Apr. 1994, page 12 of 40

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