HA12215F
Audio Signal Processor for Cassette Deck
(Dolby B-type NR with Recording System)
ADE-207-253D (Z)
Target Specification
5th Edition
Oct. 1999
Description
HA12215F 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 channel
REC equalizer
2 channel
Music sensor
1 channel
Pass amp.
2 channel
Each electronic control switch to change REC equalizer, bias, etc.
Features
REC equalizer is very small number of external parts and have 6 types of frequency characteristics
built-in.
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 and PB equalizer fully electronic control switching
built-in.
Available to reduce substrate-area because of high integration and small external parts.
HA12215F
Rev.5, Oct. 1999, page 2 of 69
Ordering Information
Operating Voltage
Product
V
CC
(V)
V
EE
(V)
Note
HA12215F
+6.0 to +7.5
7.5 to 6.0
|
V
CC
+ V
EE
|
< 1.0 V
Standard Level
Product
Package
PB-OUT Level
REC-OUT Level
Dolby Level
HA12215F
FP-56
580 mVrms
300 mVrms
300 mVrms
Function
Product
Dolby B-NR
REC-EQ
Music
Sensor
Pass Amp.
REC / PB
Selection
ALC
HA12215F
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.
HA12215F
Rev.5, Oct. 1999, page 3 of 69
Pin Description, Equivalent Circuit (V
CC
= 7 V, A system of split supply voltage,
Ta = 25C, No Signal, The value in the show typical value.)
Pin No.
Terminal Name
Note
Equivalent Circuit
Pin Description
51
AIN (R)
V = GND
GND
V
100k
PB A Deck input
48
AIN (L)
53
BIN (R)
V = GND
PB B Deck input
46
BIN (L)
56
RIN (R)
V = GND
REC input
43
RIN (L)
5
EQIN (R)
V = GND
REC equalizer input
38
EQIN (L)
1
DET (R)
V = V
EE
+2.7V
V
CC
V
EE
V
Time constant pin for
Dolby-NR
42
DET (L)
2
BIAS1
V = V
EE
+0.6V
V
EE
V
Dolby bias current
input
41
BIAS2
V = V
EE
+1.3V
V
EE
V
REC equalizer bias
current input
HA12215F
Rev.5, Oct. 1999, page 4 of 69
Pin Description, Equivalent Circuit (V
CC
= 7 V, A system of split supply voltage,
Ta = 25C, No Signal, The value in the show typical value.) (cont)
Pin No.
Terminal Name
Note
Equivalent Circuit
Pin Description
3
PBOUT (R)
V = GND
V
CC
V
EE
V
PB output
40
PBOUT (L)
4
RECOUT (R)
V = GND
REC output
39
RECOUT (L)
7
EQOUT (R)
V = GND
REC equalizer output
36
EQOUT (L)
28
MAOUT
V = GND
MS Amp. output *
1
8
ROUT (R)
V = GND
Input Amp. output
35
ROUT (L)
52
ABO (R)
R1 = 15 k
R2 = 12 k
V
CC
V
EE
R2
R1
V
Time constant pin for
PB equalizer (70
)
47
ABO (L)
6
BOOST (R)
R1 = 4.8 k
R2 = 4.8 k
Time constant pin for
low boost
37
BOOST (L)
31
BIAS (M)
V = V
CC
0.7V
V
CC
V
REC bias current
output
32
BIAS (C)
33
BIAS (N)
Note:
1. MS: Music Sensor
HA12215F
Rev.5, Oct. 1999, page 5 of 69
Pin Description, Equivalent Circuit (V
CC
= 7 V, A system of split supply voltage,
Ta = 25C, No Signal, The value in the show typical value.) (cont)
Pin No.
Terminal Name
Note
Equivalent Circuit
Pin Description
21
V
CC
V = V
CC
Power supply
49
GND
V = 0V
GND pin
50
V
EE
V = V
EE
Negative power
supply
45, 54
NC
No connection
No connection
15
ALC
ON
/OFF
I = 50
A
22 k
GND
V
I
100 k
Mode control input
16
PB
A
/B
17
A
120
/70
18
NORM
/HIGH
19
B
NORM
/CROM/
METAL
20
BIAS ON/
OFF
22
RM
ON
/OFF
23
NR ON/
OFF
25
LM ON/
OFF
24
REC
/PB/PASS
2.5 V
100 k
100 k
-
+
V
22 k
Mode control input
26
MSOUT
I = 0
A
V
I
MSGND
V
CC
V
EE
MS output (to MPU) *
1
Note:
1. MS: Music Sensor
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