HA12206NT
Audio Signal Processor for Cassette Deck
ADE-207-198B (Z)
3rd Edition
Jun. 1999
Description
HA12206NT is silicon monolithic bipolar IC providing music sensor system, ALC, REC equalizer system
and each electronic control switch in one chip.
Functions
REC equalizer
2 channel
Line Amp.
2 channel
ALC (Automatic Level Control)
MS (Music Sensor)
Each electronic control switch to change REC equalizer, bias, etc.
REC mute
Features
REC equalizer is very small number of external parts, built-in 2 types of frequency characteristics.
Correspondence with normal position (TYPE I) / high position (TYPE II).
TYPE I / TYPE II and PB equalizer fully electronic control switching built-in.
Controllable from direct micro-computer output.
Available to reduce substrate-area because of high integration and small external parts.
HA12206NT
Rev.3, Jun. 1999, page 2 of 32
Pin Description, Equivalent Circuit (V
CC
= 7.0V, V
EE
= 7.0V, Ta = 25C, No signal,
The value in the table show typical value.)
Pin No.
Pin Name
Note
Equivalent Circuit
Pin Description
2
PB-Ain (R)
V=0
100k
V
A Deck PB input
29
PB-Ain (L)
4
PB-Bin (R)
B Deck PB input
27
PB-Bin (L)
5
REC-in (R)
REC input
26
REC-in (L)
9
EQ-in (R)
Equalizer input
22
EQ-in (L)
12
MIMS
MS Gain control
3
AB out (R)
V = 0
V
14.9k
10.6k
Time constant for
NAB standard
28
AB out (L)
6
ATT (R)
V = 0
V
Variable
impedance for
attenuation
25
ATT (L)
7
RPOUT (R)
V
CC
V
EE
REC or PB output
24
RPOUT (L)
HA12206NT
Rev.3, Jun. 1999, page 3 of 32
Pin Description, Equivalent Circuit (V
CC
= 7.0V, V
EE
= 7.0V, Ta = 25C, No signal,
The value in the table show typical value.) (cont)
Pin No.
Pin Name
Note
Equivalent Circuit
Pin Description
8
ADD in (R)
100k
100k
100k
100k
100k
23
8
Adder input
23
ADD in (L)
10
EQOUT (R)
V = 0V
V
100k
Equalizer output
21
EQOUT (L)
11
IREF
V = 1.2V
V
Equalizer
reference current
input
13
DET MS
V = V
CC
4.2V
V
Time constant for
rectifier
15
DET ALC
V = 2.3V
16
MS
MS output
HA12206NT
Rev.3, Jun. 1999, page 4 of 32
Pin Description, Equivalent Circuit (V
CC
= 7.0V, V
EE
= 7.0V, Ta = 25C, No signal,
The value in the table show typical value.) (cont)
Pin No.
Pin Name
Note
Equivalent Circuit
Pin Description
17
Acr
V = 0V
22k
V
CC
V
100k
Mode control
18
Bcr
19
REC MUTE
20
REC / A / B
V = 2.5V
1
V
EE
V
EE
pin
14
V
CC
V
CC
pin
30
GND
GND pin
HA12206NT
Rev.3, Jun. 1999, page 5 of 32
Block Diagram
12345
6789
1
0
1
1
1
2
1
3
1
4
AINR
ABOUTR
BINR
RECINR
ATTR
RPOUTR
ADDINR
EQINR
EQOR
AINL
ABOUTL
BINL
RECINL
ATTL
RPOUTL
ADDINL
EQINL
EQOL
RECAB
RECMUTE
BCR
ACR
MS
EQOUT
(R)
RECOUT
(R)
or
PBOUT
(R)
REC in
(R)
-
12.7dBs
(180mV)
PB Bin
(R)
PB Ain
(R)
IREF
(436mV)
(38.8mV)
MIMS
DETMS
DETALC
C7
10
C6
0.33
C4R
0.1
C2R
0.1
C2L
0.1
C1R
4700p
C1L
4700p
-
30dBs
(24.5mV)
-
30dBs
-
30dBs
-
30dBs
-
30dBs
100k
-
30dBs
-
26dBs
-
5dBs
R2R
2.2k
100k
67k
R1R
15k
R2L
2.2k
R1L
15k
R5
68k
R4
R3R
R3L
C3R
C4L
0.1
R8
3.9k
5V
C3L
R7
1M
R6
330k
V
CC
+7V
V
EE
Unit
R :
C : F
+
15
+
-
+
-
+
67k
100k
100k
100k
100k
100k
100k
1k
1k
N
N
A
A
B
B
C
C
REC
REC
SW1R
SW1L
SW2R
SW2L
SW3R
SW3L
SW4R
SW4L
20dB
20dB
Mute
Mute
22.7k
22.7k
27.5dB
27.5dB
-
2.5dBs
(580mV)
(1.64Vpp)
(580mV)
-
2.5dBs
10.6k
10.6k
14.9k
14.9k
+
+
V
EE
-
7V
EQOUT
(L)
RECOUT
(L)
or
PBOUT
(L)
REC in
(L)
PB Bin
(L)
PB Ain
(L)
GND
+
-
100k
REC
EQ
ADDER
+
-
(SW1)
REC/A/B
RECMUTE
(SW3)
ON/OFF
Bcr
(SW2)
C/N
Acr
(SW2)
C/N
REC
EQ
MS
DET
ALC
DET
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
+
-
C5
2200p
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