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Электронный компонент: HA12204NT

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HA12203NT/HA12204NT
Audio Signal Processor for Cassette Deck
(Dolby B-type NR with Recording System)
ADE-207-222B
Target Specification
3rd Edition
Jun. 1999
Description
HA12203NT is silicon monolithic bipolar IC providing Dolby noise reduction system*
1
, music sensor
system, REC equalizer system and each electronic control switch in one chip.
Note: 1. Dolby is a trademark of Dolby Laboratories Licensing Corporation. A license from Dolby
Laboratories Licensing Corporation is required for the use of this IC.
Functions
Dolby B - NR*
2
2 channel
REC equalizer
2 channel
Music sensor
1 channel
Pass amp.
2 channel
Each electronic control switch to change REC equalizer, bias, etc.
Note: 2. HA12204NT is not built-in Dolby noise reduction system.
Features
REC equalizer is very small number of external parts and have 6 types of frequency characteristics
built-in.*
3
2 types of input for PB, 1 type of input for REC.
70 - PB equalizer changing system built-in.
Dolby NR with dubbing double cassette decks.
Unprocessed signal output available from recording out terminals during PB mode.
Provide stable music sensor system, available to design music sensing time and level.
Controllable from direct micro-computer output.
Bias oscillator control switch built-in.
NR ON / OFF and REC / PB fully electronic control switching built-in.
Normal-speed / high-speed, Normal / Crom / Metal*
3
and PB equalizer fully electronic control
switching built-in.
Available to reduce substrate-area because of high integration and small external parts.
HA12203NT/HA12204NT
Rev.3, Jun. 1999, page 2 of 97
Note: 3. HA12204NT have 4 types of frequency characteristics.
Ordering Information
Standard Level
PB-OUT
REC-OUT
Dolby
Operating Voltage Range
Product
Package
Level
Level
Level
V
CC
(V)
V
EE
(V)
Note
HA12203NT
DP-42S
580mVrms
300mVrms
300mVrms
+6.0 to +7.5
7.5 to 6.0
|
V
CC
+ V
EE
|
< 1.0V
HA12204NT
--
Function
Product
Dolby
B-NR
REC-EQ
Music
Sensor
Pass Amp.
REC / PB
Selection
HA12203NT
!
!
!
!
!
!
HA12204NT
!
!
!
!
!
Note:
Depending on the employed REC / PB head and test tape characteristics, there is a rare case that
the REC-EQ characteristics of this LSI can not be matched to the required characteristics because of
built-in resistors which determined the REC-EQ parameters in this case, please inquire the
responsible agent because the adjustment built-in resistor is necessary.
HA12203NT/HA12204NT
Rev.3, Jun. 1999, page 3 of 97
Pin Description, Equivalent Circuit
(V
CC
= 7 V, Ta = 25C, No Signal, The value in the show typical value.)
Pin No.
Terminal Name
Note
Equivalent Circuit
Pin Description
2
AIN (R)
V = GND
GND
V
100k
PB A Deck input
41
AIN (L)
4
BIN (R)
V = GND
PB B Deck input
39
BIN (L)
6
RIN (R)
V = GND
REC input
37
RIN (L)
10
EQIN (R)
V = GND
REC equalizer input
33
EQIN (L)
7
DET (R)
V = V
EE
+2.7V
V
CC
V
EE
V
Time constant pin
for Dolby-NR
36
DET (L)
5
BIAS1
V = V
EE
+0.6V
V
EE
V
Dolby bias current
input
38
BIAS2
V = V
EE
+1.3V
V
EE
V
REC equalizer bias
current input
HA12203NT/HA12204NT
Rev.3, Jun. 1999, page 4 of 97
Pin No.
Terminal Name
Note
Equivalent Circuit
Pin Description
8
PBOUT (R)
V = GND
V
CC
V
EE
V
PB output
35
PBOUT (L)
9
RECOUT (R)
V = GND
REC output
34
RECOUT (L)
11
EQOUT (R)
V = GND
Equalizer output
32
EQOUT (L)
28
MAOUT
V = GND
MS Amp output
3
ABO (R)
V = GND
V
CC
V
EE
12k
15k
V
Time constant pin
for PB equalizer
40
ABO (L)
V = GND
23
BIAS (M)
V = V
CC
0.7V
V
CC
V
REC bias current
output
24
BIAS (C)
25
BIAS (N)
22
V
CC
V = V
CC
Power supply
42
GND
V = 0V
GND pin
1
V
EE
V = V
EE
Negative power
supply
5, 7, 18,
23, 30,
31, 36
NC
No
connection
only
HA12204
No connection
HA12203NT/HA12204NT
Rev.3, Jun. 1999, page 5 of 97
Pin No.
Terminal Name
Note
Equivalent Circuit
Pin Description
12
A / B
I = 50A
V
I
22 k
GND
100 k
Mode control input
13
A120 / 70
14
NORM / HIGH
15
B NORM / CROM
/ METAL
16
BIAS ON / OFF
17
RM ON / OFF
18
NR ON / OFF
20
LM ON / OFF
19
REC / PB / PASS
2.5 V
V
100 k
100 k
22 k
+
Mode control input
21
MSOUT
I = 0A
V
I
GND
V
EE
V
CC
MS output
(to MPU)*1)
30
GPCAL
V = GND
V
110 k
2.5 V
GP gain Calibration
terminal
31
RECCAL
V = GND
REC gain calibration
terminal