HIT HA12136AF, HA12136A, HA12135AF, HA12135A, HA12134AF Datasheet

HA12134A, HA12135A, HA12136A

Dolby B-Type Noise Reduction System

ADE-207-016B (Z)

3rd Edition

Jun. 1999

Description

The HA12134A, HA12135A, HA12136A are silicon monolithic bipolar IC series providing dual channel
Dolby B-type noise reduction system* in one chip. The circuit is used primarily to reduce the level of
background noise introduced during recording and playback of audio signals on magnetic tape.

HA12134A series provide the following functions and features.

Functions

• Dual Dolby B-type NR processor

• NR ON/OFF control switch.

• Record (encode)/playback (decode) control switch.

Features

• Separate record/playback input and output.

Unprocessed signal output available in the encode and decode modes.

• Reduction of external components count.

• Small capacitor value for the reference voltage.

• NR ON/OFF switching and REC/PB switching are provided internally.

• 2-type package (DP-16, FP-16DA)

• Wide range of operating supply voltage.

* 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.

HA12134A, HA12135A, HA12136A

Ordering Information

Type No Dolby Level (mVrms) Package

HA12134A 300 DP-16
HA12134AF FP-16DA
HA12135A 450 DP-16
HA12135AF FP-16DA
HA12136A 580 DP-16
HA12136AF FP-16DA

Block Diagram

REC IN

16

GND

15

PB IN

14 13

SW

BIAS

SW

321

1 µ

REC IN V PB IN V

CC

4

+

REF

18 k

BUF
AMP

BUF
AMP

22 µ

NR
ON/OFF

REC/PBBIAS

12

PB OUT

22 k

11

DET

10

REC OUT

0.22 µ

9

SIDE
CHAIN

SIDE
CHAIN

8765

22 k

+

0.22 µ

PB OUT DET REC OUT

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

HA12134A, HA12135A, HA12136A

Absolute Maximum Ratings (Ta = 25°C, Unless otherwise specified.)

Item Symbol Rating Unit Note

Supply voltage Vccmax 16 V
Power dissipation Pd 250 mW Ta ≤ 85°C
Operating temperature Topr –40 to +85 °C
Storage temperature Tstg –55 to +125 °C
Lead temperature TI 260 °C Note 1
Note: 1. Soldering 10 sec.

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

HA12134A, HA12135A, HA12136A

Electrical Characteristics (Ta = 25°C, VCC = 12 V, Unless otherwise specified.)

Item Symbol Min Typ Max Unit Test conditions

Operating voltage HA12134A Vope 6.5 12.0 16.0 V Enable functional operations

HA12135A 8.0 12.0 16.0

HA12136A 9.5 12.0 16.0
Quiescent current I
Voltage gain of HA12134A G

Q

VIA

input amp HA12135A 24.5 26.5 28.5 (Pin 16→Pin 11)

HA12136A 26.5 28.5 30.5 Vout = 0 dB, f = 1 kHz
NR encode boost

V 8 (9) (NR ON)

ENC-1.4
k (1)

V 8 (9) (NR OFF) ENC-1.4

k (2)
ENC-5 k

(1)
ENC-5 k

(2)
ENC-10

k (1)
ENC-10

k (2)

T.H.D (REC) T.H.D

(REC)

Signal handling HA12134A Vomax 12.0 13.0 — dB f = 1 kHz, VCC = 6.5 V

HA12135A (REC) T.H.D = 1% VCC = 8.0 V

HA12136A VCC = 9.5 V
Signal/noise ratio

(REC)

Crosstalk (ENC)
(Pin 8 – Pin 9)

Control voltage for

S/N
(REC)

CT R→L
L→R

REC 2.5 — V

REC/PB

PB 0.0 — 0.5

Control voltage for

ON 2.5 — V

NR ON/OFF

OFF 0.0 — 0.5

Channel balance ∆G

VIA

— 7 — mA No signal, REC NR-ON

21.0 23.0 25.0 dB Pin 1→Pin 6

2.9 4.4 5.9 dB f = 1.4 kHz
V 8 (9) (NR OFF) = –20 dB

6.0 7.5 9.0 dB f = 1.4 kHz
V 8 (9) (NR OFF) = –30 dB

1.7 3.2 4.7 dB f = 5 kHz
V 8 (9) (NR OFF) = –20 dB

6.7 8.2 9.7 dB f = 5 kHz
V 8 (9) (NR OFF) = –30 dB

–1.1 0.4 1.9 dB f = 10 kHz

V 8 (9) (NR OFF) = 0 dB

9.8 10.4 11.8 dB f = 10 kHz
V 8 (9) (NR OFF) = –40 dB

— 0.05 0.3 % f = 1 kHz

V 8 (9) (NR ON) = 0 dB

62.0 68.0 — dB Rg = 5.1 kΩ
weighted
CCIR/ARM

52.0 60.0 — dB f = 1 kHz
NR OFF

V

CC

V

CC

REC/PB

12

Measure

NR
ON/OFF

5

22 k

Measure

22k

–1.0 0.0 1.0 dB

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

HA12134A, HA12135A, HA12136A

Electrical Characteristics (Ta = 25°C, VCC = 12 V, Unless otherwise specified.) (cont)

Item Symbol Min Typ Max Unit Test conditions

Offset voltage
V 8 (9) (NR-ON) –
V 8 (9) (NR-OFF)

Test Circuit

∆Vorec –50 0.0 50 mV

REC mode
V

= 16.0 V

CC

SW1

OFF ON

AUDIO SG
HP339A or
EQUIVALENT

SW9

SW3

R10
10k

C11

+

P

0.68µ
C12

R

+

R11

5.1k

L

SW2

R

R1

5.1k

R2
10k

16

1µ

C1

+

1µ

R

C2

P

+

0.68µ

15 14

GND PB IN BIAS REC/PBPB

REC
IN

REC
IN

Vcc PB IN V

31

2

C3

100µ

+

OFF ON

SW10

DC POWER
SOURCE

To Vcc

SW8

PBREC

C10

0.22µ

DET REC

OUT

REC
OUT

DET

7

C5

0.22µ

9

NR
ON/OFFPBOUT

C13
+

22µ

ON

12

5

SW4

R8
22k

R3
22k

11 10

OUT

6

OFF

R9
18k

13

REF
4

+

C4

1µ

R7

C9

10k

+

SW7

10µ

P

C8

R

+
10µ

R6
10k

SW6

R5

C7

8

+

R

10µ

P

C6

SW5

+

10µ

R4
10k

AC VOLT
METER
HP 400E or
EQUIVALENT

DISTORTION
ANALYZER
HP339A or
EQUIVALENT

OSCILLOSCOPE
TEKTRO 475 or
EQUIVALENT

NOISE METER
WITH CCIR/
ARM FILTER

Notes: 1. Resistor tolerances are ±1%

2. Capacitor tolerances are ±1%

3. Unit R: Ω C: F

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

HA12134A, HA12135A, HA12136A

Pin Description (Ta = 25°C, VCC = 12 V, No signal, The value in the table show typical

value.)

Pin No. Symbol R (in) VDC Equivalent circuit Description

1, 16 REC IN 56 kΩ 6.0 V

V

56k

V /2

GND

2VCC— 12.0 V Power supply
3, 14 PB IN 100 kΩ 6.0 V

V

Recording (encode) input

CC

CC

Playback (decode) input

CC

4V

REF

— 6.0 V Reference voltage

5 NR ON/OFF — —

6, 11 PB OUT — 6.0 V

100k

1k

100

100

100k

V

GND

CC

V /2

GND

V

CC

3 V

GND

CC

BE

4 V

Mode control pin for NR
ON/OFF
“H”→NR ON
“L”→NR OFF

BE

Playback (decode) output

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

HA12134A, HA12135A, HA12136A

Pin Description (Ta = 25°C, VCC = 12 V, No signal, The value in the table show typical

value.) (cont)

Pin No. Symbol R (in) VDC Equivalent circuit Description

7, 10 DET — 1.3 V

8, 9 REC OUT — 6.0 V

100

100

V

CC

GND

V

CC

Time constant pin for the
level detector

Recording (encode)
output

12 REC/PB — —

13 BIAS — 1.0 V

15 GND — 0 V

—

1k

GND

100k

V

CC

GND

V

CC

3 V

4 V

GND

Mode control pin for
REC/PB (encode/decode)
“H” → REC (encode)
“L” → PB (decode)

BE

BE

Reference current input
pin for the active filters

Ground

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

HA12134A, HA12135A, HA12136A

10

No Signal

8

Q

6

4

Quiescent current I [mA]

2

0

4681012141618

Supply voltage Vcc [V]

Figure 1 Quiescent Current vs. Supply Voltage

HA12134A/5A/6A

NR-ON

NR-OFF

3.0
HA12134A/5A/6A

2.5

2.0

1.5

1.0

Control voltage (REC/PB) [V]

0.5

0

4 6 8 101214 1618

REC Mode

PB Mode

Supply voltage Vcc [V]

Figure 2 REC/PB Control Voltage vs. Supply Volta ge

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

3.0

2.5

HA12134A, HA12135A, HA12136A

HA12134A/5A/6A

2.0

1.5

1.0

Control voltage (NR-ON/OFF) [V]

0.5

0

4 6 8 101214 1618

NR-ON

NR-OFF

Supply voltage Vcc [V]

Figure 3 NR-ON/OFF Control Voltage vs. Supply Voltage

12

10

8

6

HA12136A

12 V

16 V

–40 dB

9.5 V

–30 dB

4

Encode boost [dB]

2

0

100 200

Figure 4 Encode Boost vs. Frequency

500 1 k 2 k 5 k

Frequency [Hz]

–20 dB

–10 dB

10 k

20 k

0 dB

100 k

50 k

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