ICs for Cassette/Cassette Deck Use
AN7356NSC
Recording and playback equalizer amp. IC for Hi-Fi cassette deck
■ Overview
22
21.25±0.3
0.45
21
0.35±0.1
2.0±0.2
9.5±0.3
0.9
0.3
0.15
• Control various adjustment circuit by serial data
• Playback system
• Built-in variable volume circuit (±6 dB) for playback
gain adjustment
• Built-in various equalizer switching circuit
• Built-in series mute circuit
• Recording system
• Built-in equalizer (freq. characteristics, gain) circuit of
middle and high frequencies
• Built-in volume circuit (+20 dB) for overall gain
adjustment
• With low frequency band boost pins
• Built-in drive circuit for current output
• With parallel data output
42
1.0
■ Features
Unit: mm
1
0.1±0.1
The AN7356NSC is an audio signal processing IC for
analog cassette deck. All the recording and playback processing can be realized with one chip.
11.5±0.3
SSOP042-P-0450A
■ Applications
• Cassette deck (Hi-Fi)
1
AN7356NSC
ICs for Cassette/Cassette Deck Use
■ Block Diagram
42 GND
−VEE 1
T1 2
41
T2 3
40
4
39
PB
5
EQ-VR
38
VCA
REG
VCA
37
36
600
LPF
600
LPF
7
T2
PB
EQ-VR
6
T1
PB out 8
35
Rec.
Rec.in 10
11
31
L-boost
Fm/GH
Q/FF/FR
L-boost
13
Fm/GH
Q/FF/FR
12
PB out
34
33 Rec. in
32
Rec.
VCC 9
30
29
14
VCA
VCA
VOUT 15
28
IOUT 16
27
VOUT
IOUT
26 Inj.
25
DA
DA
DA
DA
L
L
L
L
S/P
FET 19
DAC
Bias 2 18
DAC
Bias 1 17
VDD
24 D-GND
Address
IE 21
2
S/P
−VEE 20
23
Shift register
S-data
22 CLK
ICs for Cassette/Cassette Deck Use
AN7356NSC
■ Pin Descriptions
Pin No.
Description
Pin No.
Description
1
Negative supply pin
22
Clock input
2
Playback amp. TAPE1 input
23
Serial data input
3
Playback amp. TAPE2 input
24
GND pin
4
Playback amp. negative feedback input
25
Positive supply pin
5
Playback amp. equalizer pin
26
Injector current pin
6
Playback amp. negative feedback output
27
Recording amp. current output
7
LPF pin
28
Recording amp. voltage output
8
Playback amp. output
29
Recording volume amp. input
9
Positive supply pin
30
Recording equalizer amp. output
10
Recording amp. non-inverting input
31
11
Low frequency band boost pin
32
Low frequency band boost pin
12
DAC output pin(Addr.: 02)
33
Recording amp. non-inverting input
13
Recording equalizer amp. output
34
DAC calibration pin
14
Recording volume amp. input
35
Playback amp. output
15
Recording amp. voltage output
36
LPF pin
16
Recording amp. current output
37
Playback amp. negative feedback output
17
DAC output pin(Addr.: 0A)
38
Playback amp. equalizer pin
18
DAC output pin (Addr.: 09)
39
Playback amp. negative feedback input
19
FET drive current output
40
Playback amp. TAPE2 input
20
Negative supply pin
41
Playback amp. TAPE1 input
21
Erase current output
42
GND pin
■ Absolute Maximum Ratings
Parameter
Symbol
Rating
Unit
VCC
±7.7
V
VDD
+7.7
ICC
mA
PD
443
mW
Topr
−25 to +75
°C
Tstg
−55 to +150
°C
Supply voltage
Supply current
Power dissipation
*2
Operating ambient temperature
Storage temperature
*1
*1
Note) *1 : All items are at Ta = 25°C, except for the operating ambient temperature and storage temperature.
*2 : Power dissipation of the IC single unit at Ta = 75°C. Use the IC under the conditions of not exceeding the allowable power
dissipation curve.
■ Recommended Operating Range
Parameter
Supply voltage
Symbol
Range
Unit
VCC
±4.5 to ±6.5 (typ.) to ±7.2
V
VDD
4.5 to 5.0 to 5.5
3
AN7356NSC
ICs for Cassette/Cassette Deck Use
■ Electrical Characteristics at VCC = ±6.5 V, Ta = 25°C
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
Note
VIN = −56 dBV, f = 1 kHZ, 30 kHz LPF on
Playback system
Reference output level (0 dB)
V1
−3.4
−1.4
0.6
dBV
Data(1)
Reference output level (+6 dB)
GH
Difference between 6 dB and 0 dB
GH = data (2)−data (1)
5.0
6.0
7.0
dB
Data(2)
Reference output level (−6 dB)
GL
Difference between −6 dB and 6 dB
GL = data (2)−data (3)
10
11.8
13.5
dB
Data(3)
∆GT12
Operation: The above reference output
level (V1) difference between tapes
0
1
dB
Total harmonic distortion (T1, 0 dB) THD1
VIN = −64 dBV, 30 kHz LPF on
0.12
0.4
%
Total harmonic distortion (T2, 0 dB) THD2
VIN = −64 dBV, 30 kHz LPF on
0.12
0.4
%
Output noise voltage (T1, 0 dB)
VNO1
IHF−A, Rg = 2.2 kΩ
−69
−56
dBV
Output noise voltage (T2, 0 dB)
VNO2
IHF−A, Rg = 2.2 kΩ
−69
−56
dBV
Maximum output level (0 dB)
VOMX
THD = 3%
2.0
3.6
dBV
Cross talk (ch. R → ch. L)
CT1
Rg (CH2) = 220 Ω
60
dB
Cross talk (ch. L → ch. R)
CT2
Rg (CH1) = 220 Ω
60
dB
Output offset voltage (0 dB)
VOFF
Rg = 220 Ω
−450
+130
mV
Mute attenuation (T2)
GM0
DAC5 = (08)
60
dB
Mute attenuation (T1)
GM1
T2 mode
60
dB
Mute attenuation (T2)
GM2
T1 mode
60
dB
Pulse noise voltage
∆VP
Rg = 2.2 kΩ
0
9
mV
EQ-VR (120 µ)
VEQ120
f = 10 kHz
−7.3
−5.3
−3.3
EQ-VR (70 µ)
GEQ70
f = 10 kHz
GEQ70 = data (18)−data (17)
−5.0
−4.0
−3.0
dB
Data(18)
EQ-VR (50 µ)
GEQ50
f = 10 kHz
GEQ50 = data (19)−data (17)
−8.5
−7.5
−6.5
dB
Data(19)
600 Hz LPF (50 µ)
GLPF
f = 10 kHz
GLPF = data (23)−data (19)
−25
−20
dB
Data(23)
T1/T2 switching shock noise
∆VT12
Operation: The above output offset
voltage (VOFF) difference between tapes
−55
0
55
mV
Level difference between
tapes
dBV Data(17)
Recording system
Reference output (EQ output)
VEQ
fIN = 400 Hz, VIN = 6 dBV
−3
−0.5
2.0
dBV
Middle and high
GHH
V (400 Hz) = 0 dB fIN = 10 kHz
dB
3.0
5.0
7.0
VIN = −12 dBV
10
13
15
frequency gain
Low
∆GHL
∆GHL = data
(32H)−data (32L)
High frequency
High
GPH
V(400 Hz) = 0 dB
fIN = 25 kHz
18
21
22
∆GHL = data
(33H)−data (33L)
VIN = −30 dBV
18
12
24
peak gain
4
High
Low
∆GPL
Data (32H)
Data (32L)
dB
Data (33H)
Data (33L)
ICs for Cassette/Cassette Deck Use
AN7356NSC
■ Electrical Characteristics at VCC = ±6.5 V, Ta = 25°C (continued)
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
Note
dB
Data(34W)
Recording system (continued)
High frequency peak
Wide
GQW
V(25 kHz) = 0 dB
f(peak) = 25 kHz
2.7
4.7
6.7
bandwidth
(10 kHz output)
NAR
∆GQL
∆GHL = data (34W)
−Data (34N)
f = 35 kHz
VIN = −18 dBV
14
16
18
High frequency peak
High
DfPH
fIN = 44 kHz
VIN = −30 dBV (2D)
(30)
(3B)
frequency DAC control
Low
DfPL
fIN = 11 kHz
(0D)
(10)
(13)
Volume amp. gain
High
GTH
17
19
21
(VOL output)
Low
∆GTL
∆GTL = data (36H) fIN = 1 kHz
−data (36L)
(VR input)
16.3
18.3
20.3
Total harmonic
distortion
VOL
THDRV
VIN = −14 dBV
RLV = 10 kΩ
0.3
0.8
CURR THDRC
VIN = −20 dBV
RLV = l kΩ
0.3
0.8
VIN = −18 dBV
fIN = 1 kHz
Data(34N)
dB
Data(36L)
%
VOL
VO-RV
RLV = 10 kΩ
fIN = 1 kHz
2.2
3.2
CURR
VO-RC
RLV = 1 kΩ
THD = 3%
1.0
1.5
Output noise voltage
(curr. output)
VN-RC
Rg = 0 Ω, RLV = 1 kΩ
IHF-A
0.45
2
mV[rms]
Input muting attenuation
(EQ output)
IMEQ
fIN = 1 kHz, VIN = −6 dBV
40
dB
Maximum output
voltage
Data(36H)
V[rms]
Output offset voltage
(EQ output)
VOF-EQ
−500
+900
mV
Output offset voltage
(curr. output)
VOF-RC
−25
+25
µA
Output muting attenuation
(VOL output)
OMRV
fIN = 1 kHz, VIN = 0 dBV
DAC (GTL) = (10)
60
dB
−9
+9
mV[p-0]
DAC09 = (00)
DAC0A = (00)
−2.5
−1.9
1.5
V
DC voltage
Data(45)
Pulse noise voltage
(curr. output)
VPN (RC) Rg = 0 Ω
Logic system
Bias output (low)
VBL
Bias control width
∆VBH
DAC09 = (FF), DAC0A = (FF)
Data(46)−data(45)
4.2
4.7
5.2
V
DC voltage
Data(46)
Analog +VCC
IVCC
Without input
21
28
34
mA
DC
Digital +VDD
IVDD
Without input
0.7
1.5
2.3
mA
DC
−VEE
IVEE
Without input
−40
−36
−31
mA
DC
Current consumption
5
AN7356NSC
ICs for Cassette/Cassette Deck Use
■ Terminal Equivalent Circuits
Pin No.
Equivalent circuit
1
Description
Negative supply pin
Standard waveform
DC −6.5 V
Main circuit (−VEE)
(analog system)
2
Playback amp. T1 in (R-ch.)
DC 0 V
Playback amp. Tape1 input
−VEE
Pins 2, 3, 40, 41
3
Playback amp. T2 in (R-ch.)
Playback amp. Tape2 input
4
Playback amp. NF in (R-ch.)
DC 0 V
Playback amp. negative feedback
input
Pins 4, 39
−VEE
5
NF switch (R-ch.)
+VCC
Playback amp. equalizer switching
Pins 5, 38
−VEE
6
−VEE
DC 0 V
ICs for Cassette/Cassette Deck Use
AN7356NSC
■ Terminal Equivalent Circuits (continued)
Pin No.
Equivalent circuit
Description
+VCC
6
Playback amp. NF out (R-ch.)
Standard waveform
DC 0 V
Playback amp. negative feedback
ouput
47 Ω
47 Ω
47 kΩ
Pins 6, 37
−VEE
+VCC
7
LPF-R
DC 0 V
600 Hz LPF
27 kΩ
−VEE
Pins 7, 36
8
Playback amp. out (R-ch.)
+VCC
DC 0 V
Playback amp. output
47 Ω
Pins 8, 35
47 Ω
47 kΩ
−VEE
9
Positive supply pin
DC 6.5 V
Main circuit (+VCC)
(analog system)
7
AN7356NSC
ICs for Cassette/Cassette Deck Use
■ Terminal Equivalent Circuits (continued)
Pin No.
Equivalent circuit
10
Description
Rec. in(R)
Pins 10, 33
Standard waveform
DC 0 V
Rec. amp. (non-inverted) input
+VCC
100 Ω
10 kΩ
11
Boost (R)
DC 0 V
Low frequency boost
Pins 10, 33
6.2 kΩ
28.6 kΩ
5.9 kΩ
10 kΩ
Pins 11, 32
12
DM
+VCC
D-GND
DC 0 V
DAC output
2 kΩ
(Medium cut-off frequency control)
12
−VEE
13
+VCC
EQ out (R)
Rec. equalizer amp. output
47 Ω
47 Ω
−VEE
8
Pins 13, 30
DC 0 V
ICs for Cassette/Cassette Deck Use
AN7356NSC
■ Terminal Equivalent Circuits (continued)
Pin No.
Equivalent circuit
Description
+VCC
14
VR in (R)
Standard waveform
DC 0 V
Rec. volume amp. input
200 Ω
Pins 14, 29
10 kΩ
+VCC
15
VOUT(R)
DC 0 V
Rec. amp. voltage output
47 Ω
47 Ω
Pins 15, 28
−VEE
16
IOUT(R)
Rec. amp. current output
Pins 16, 27
+VDD
17
Bias 1
DAC output of address 0A
18
Pins 17,18
100 kΩ
Bias 2
DAC output of address 09
−VEE
9
AN7356NSC
ICs for Cassette/Cassette Deck Use
■ Terminal Equivalent Circuits (continued)
Pin No.
Equivalent circuit
19
Description
Standard waveform
FET
VCC
FET drive current output
Pins 19, 21
47 kΩ
D-GND
20
Supply pin
DC −6.5 V
Main circuit (−VEE)
(digital system)
21
Refer to pin 19
IE
Erase current output
22
D-GND
Pins 22
23
D-GND
SCLK
DC 0 V
Clock input
I2L
23
S-data
10 kΩ
Serial data input
−VEE
24
GND
DC 0 V
Main circuit (GND)
(digital system)
25
Supply pin
DC 5.0 V
Main circuit (+VDD)
(digital system)
26
Inj.
I2L injector current pin
Adjust the current by an external
resister
10
ICs for Cassette/Cassette Deck Use
AN7356NSC
■ Terminal Equivalent Circuits (continued)
Pin No.
Equivalent circuit
27
Refer to pin 16
Description
IOUT(L)
Standard waveform
Refer to pin 16
Rec. amp. current output
28
Refer to pin 15
VOUT(L)
Refer to pin 15
Rec. amp. voltage output
29
Refer to pin 14
VR in (L)
Refer to pin 14
Rec. volume amp. input
30
Refer to pin 13
EQ out (L)
Refer to pin 13
Rec. equalizer amp. output
31
32
Refer to pin 11
N.C. Boost (L)
Refer to pin 11
Low frequency boost
33
Refer to pin 10
Rec in (L)
Refer to pin 10
Rec. amp. (non-inverting) input
34
+VCC
D-GND
ID
For DAC calibration
34
22 kΩ
22 kΩ
22 kΩ
−VEE
35
Refer to pin 8
Playback amp. out (L-ch.)
Refer to pin 8
Playback amp. output
36
Refer to pin 7
LPF-L
Refer to pin 7
600 Hz LPF
37
Refer to pin 6
Playback amp. NF out (L-ch.)
Playback amp. negative feedback
output
Refer to pin 6
11
AN7356NSC
ICs for Cassette/Cassette Deck Use
■ Terminal Equivalent Circuits (continued)
Pin No.
Equivalent circuit
38
Refer to pin 5
Description
Standard waveform
NF switch (L-ch.)
Refer to pin 5
Playback amp. equalizer switching
39
Refer to pin 4
Playback amp. NF in (L-ch.)
Playback amp. negative feedback
input
Refer to pin 4
40
Refer to pin 3
Playback amp. T2 in (L-ch.)
Refer to pin 3
Playback amp. Tape2 input
41
Refer to pin 2
Playback amp. T1 in (L-ch.)
Refer to pin 2
Playback amp. Tape1 input
42
GND
DC 0 V
Main circuit (GND)
(analog system)
Note) Above are typical values and may change by applied condition and dispersion etc. (VCC = ±6.5 V)
■ Technical Information
• Data specification description
1. Data construction
bit No.
Data
01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16
0
0
0
construction 0
0
Data
0
0
Control contents
Built-in switch over
1
DAC
data
1
1
Built-in DAC
{
DAC
address
D/S: Data select
12
LD: Load
ICs for Cassette/Cassette Deck Use
AN7356NSC
■ Technical Information (continuded)
• Data specification description (continuded)
2. Data communication system
2-wire system of Clock, Data
Clock
Data
Data
0
1
0
0
1
1
1
bit
01
02
03
13
14
15
16
0
Addr.
Addr.
Data
D/S
D/S
LD
Data end if data = "1"
when clock is
fall down.
Data are read when
clock is rise up.
Transmit the empty data(0) of over the 5 clock between data when transmit data continuously.
3. Data timing, switching Characteristics
1) Data timing
tW
90%
90%
10%
Clock
tSU
90%
Data
tW
90%
10%
tH
tLSUL
10%
10%
tLSUH
tLHL
90%
90%
10%
tLHH
90%
10%
13
AN7356NSC
ICs for Cassette/Cassette Deck Use
■ Technical Information (continuded)
• Data specification description (continuded)
3. Data timing, switching characteristics (continued)
2) Switching characteristics
Rating
Parameter
Symbol
Min
Typ
Max
Unit
Condition
Minimum clock pulse width
tW
5
µs
Data shift set-up time
tSU
3
µs
Data shift hold time
tH
3
µs
Data latch set-up time
tLSUH
3
µs
Data latch hold time
tLHH
3
µs
Data latch L set-up time
tLSUL
3
µs
Data latch L hold time
tLHL
3
µs
4. Data format
1) Built-in switch
bit No.
06
07
08
09
10
11
12
13
Item
120 µ/70 µ
×1/×2
T1/T2
ARM
Rec. play
Stop
PB-adj.
IE
0
70 µ
×2
T2
On*
Play*
On*
Off
Off
1
120 µ
×1
T1
Off
Rec.
Off
On
On
10
11
12
13
D/S
0 0
Note) *: Initial setting is performed when supply turns on
2) Built-in DAC
Addr.
06
(00)
07
08
09
(00) to
(20)*
D/S
to (3F): FP (peak frequency characteristics)
(01)
(00) to (08)* to (10): Q (peak Q)
(02)
(00) to (08)* to (10): FM (middle frequency
characteristics)
(00) to
(20)*
to (3F): GP (peak gain)
(04)
(00) to
(20)*
to (3F): GM (middle frequency gain)
(05)
(00)*
(06)
(00)* to (20) to (3F): GPB-L(playback gain L-ch.)
(07)
(00)* to (80) to (FF): GT-R (recording gain R-ch.)
(08)
(00)* to (80) to (FF): GT-L (recording gain L-ch.)
(09)
(00)* to (80) to (FF): Bias-2 (bias)
(0A)
(00)* to (80) to (FF): Bias-1 (bias)
(03)
(MSB)
Note) 1. *: Initial setting is performed when supply turns on
2. Inside ( ) are indicated hexadecimal number
14
1 1
to (20) to (3F): GPB-R(playback gain R-ch.)
(LSB)
ICs for Cassette/Cassette Deck Use
AN7356NSC
■ Technical Information (continued)
• Data specification description (continued)
5. Built-in switch mode table
VCA
PB
T1 T2
S2
S3
On
Fm/GH
Rec.
EQ-VR
S1
L-boost
Off
S7
S4
S5
Mute
600
LPF
S6
VCA
Q/FF/FR
2
3
4
5
6
7
8
10
11
13
14
15
16
41
40
39
38
37
36
35
33
32
30
29
28
27
Input
Output
11
STOP
10
R/P
09
ARM
Off: 1
Rec.: 1
On: 0
Off: 1
Off: 1
Play: 0
On: 0
Off: 1
Rec.: 1
On: 0
On: 0
Off: 1
Play: 0
On: 0
Note) *: Initial setting when supply on
1
DAC
S4
GPB-R
PB ouput
08
PB Rec. PB
T1/T2
T1 T2
T1: 1
T2: 0
T1: 1
T2: 0
T1: 1
T2: 0
T1: 1
T2: 0
S4
S5
T1 input
Mute
S1
T2 input
T1/T2
Mute
change-over
S2
S3
PB
output
Rec.input
Mute
Mute: 1
Mute: 1
Mute: 0
Off: 0
●
*T2: 1
Mute: 1
●
●
●
●
●
●
T1: 1
T2: 0
T1: 1
T2: 0
T1: 1
T2: 0
T1: 1
T2: 0
●
●
●
●
Off: 0
Mute: 1
Off: 0
Mute: 1
Mute: 1
Off: 0
Mute: 1
Off: 0
T1: 0
T2: 1
T1: 0
T2: 1
Off: 0
On: 1
Mute: 1
Off: 0
Mute: 1
Mute: 1
Mute: 1
*T2:
1
Mute: 0
Off: 0
●
Mute: 1
2
DAC
GTL
S6
Rec ouput
P19
FET
(10) to (3F)
On
(30) to (FF)
On
Drive
(00) to (08)
Mute
(00) to (10)
Mute
Off
3 LPF switch of playback system
12
S7
PB adj.
LPF
On
On
1
1
Off
Off
0
0
Note) Inside ( ) indicates
hexadecimal number
Note) Inside ( ) indicates hexadecimal
number
4
Erase
current
13
P21
IE
IE drive
On
On
1
Off
Off
0
5 Equalizer volume switch-over of playback system
07
06
EQ
×1/×2
120/70
50 µ
70 µ
120 µ
×1
120 µ: 1
0
0
1
1
70 µ: 0
0
1
0
×2
120 µ: 1
0
70 µ: 0
1
0
0
15
AN7356NSC
ICs for Cassette/Cassette Deck Use
■ Application Circuit Example
−VEE
GND
2.2 kΩ
R-ch.
L-ch.
220 Ω
100 kΩ
1
42
680 pF
2
41
PB in
2.2 kΩ
220 Ω
100 kΩ
680 pF
PB in
100 kΩ
680 pF
40
4
39 680 pF
120 Ω100 µF
PB
6 800 pF
5
EQ-VR
VCA
7
600
LPF
36
8
PB out
35
Rec. in
S29
10
0.47 µF
34
33
31
L-boost
10 µF
Fm/GH
13
EQ out
L-boost
1.2 kΩ 12
Fm/GH
32
Q/FF/FR
11
Q/FF/FR
10 µF
Rec.
10 µF
9
Rec.
VCC
10 µF 1 kΩ
VCA
S31
10 000 pF
1 µF
1 µF
Rec. in
10 µF
EQ out
10 µF
S32
S35
28
15
PB out
S30 10 µF
0.47 µF
29
VCA
10 µF
470 kΩ
30
14
VR in
100 µF
6 800 pF
38
37
600
LPF
10 000 pF
REG
6
120 Ω
PB
EQ-VR
VCA
470 kΩ
100 kΩ
3
10 µF
S36 1 kΩ 10 µF
10 kΩ
10 kΩ
Rec. out
Rec. out
10 µF 16
27
10 µF
1 kΩ
26
100 kΩ
19
10 kΩ
20
+VCC
21
IE
16
10 kΩ
DA
DA
DA
DA
L
L
L
L
10 µF
Address
S/P
−VEE
25
24
S/P
FET
+VCC
DAC
18
Bias 2
560 Ω
DAC
17
Bias 1
VR in
23
22 kΩ
Shift register
22
22 kΩ
1 kΩ
100 kΩ
Inj.