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ICs for Cassette, Cassette Deck
AN7354SC
Dolby* B/C-type Noise Reduction
s Overview
The AN7354SC is an IC for 2 ch. Dolby B/C-Type noise reduction process. It requires fewer external parts and incorporates the functions of line-output muting and level detection and the delay circuit.
0.45 Unit : mm
1
42
skewing circuit not requiring external parts * Line-output muting circuit built-in * PB input delay circuit built-in * Built-in level detection circuit for automatic level adjustment and level meter * ON/OFF of NR, B-/C-type, REC./PB, MPX and muting function, and Hi/Lo changeover of level detection gain, directly-controllable by microcomputer
0.10.1
1.0
21
22 2.00.2 REC. OUT 1500pF 0.47F 24 + 23
9.50.3 11.50.3
* Dolby symbols are the trademarks of Dolby Laboratory
Licensing Corporation. The use of this products requires the approval of Dolby Laboratories Licensing Corporation in advance.
42-Lead SSOP Package (SSOP042-P-0450)
s Block Diagram
VCC
REC. IN
PB IN 1500pF
5.6k MPX 2.4k
REC. /PB
MPX METER OFF/ 0dB ON /20dB + 2.2F
0.1F + 1F +
LINE OUT 100k
LEVEL METER OUT 1500pF 0.47F
1F + 42 41
1F + 40 39 38
37
36
35
34
33
32
31
30
29
28
27
26
+ 25
0.15
0.9
0.3
21.250.3 22 SS HLS LLS SS HLS LLS 15 16 17 0.47F 18 + 19 0.47F 20 + 21 LINE OUT 1500pF LEVEL METER OUT 1500pF REC. OUT
s Features * Built-in spectral
Delay
Mute Rect
Bias
LOGIC
Rect Delay Mute
1 + 1F
2
3 + 1F 22k
4
5
6
7 2.4k
8
9
10
11 +
12
13 +
14
MPX PB IN 1500pF 5.6k NR C/B ON/ -type OFF Mute ON/OFF
0.1F + 2.2F
1F
VEE
REC. IN
0.350.1 100k
AN7354SC
s Absolute Maximum Ratings (Ta=25C)
Parameter Supply Voltage Supply Current (Ta=75C) Power Dissipation (Ta=75C) Operating Ambient Temperature Storage Temperature Symbol VCC ICC (+) ICC (-) PD Topr Tstg
ICs for Cassette, Cassette Deck
Rating 6.7 +22 -22 295 -20 ~ + 75 -55 ~ + 125
Unit V mA mW C C
s Recommended Operating Range (Ta=25C)
Parameter Operating Supply Voltage Range Symbol VCC Range 4.5V ~ 6.5V
s Electrical Characteristics (VCC= 6V, Ta=25C 2C)
Parameter Total Circuit Current Note 1) REC. - IN to REC. - OUT I/O Gain Note 2) PB - IN to REC. - OUT I/O Gain Note 3) MPX ON/OFF Gain Difference LINE - OUT Level B-type Encode Boost (1) B-type Encode Boost (2) B-type Encode Boost (3) B-type Encode Boost (4) C-type Encode Boost (1) C-type Encode Boost (2) C-type Encode Boost (3) C-type Encode Boost (4) C-type Encode Boost (5) Signal Handling Total Harmonics Distortion - off Total Harmonics Distortion - C Signal to Noise Ratio Mode Switch Offset Symbol ICC Grin Gpin DGmpx Vlout BR - 1 BR - 2 BR - 3 BR - 4 CR - 1 CR - 2 CR - 3 CR - 4 CR - 5 VOmax. THDO THDC S/N Vofs - R Condition REC., OFF, No input signals REC., OFF, f = 1kHz REC. - OUT Level 388mV PB, OFF, f = 1kHz REC. - OUT Level 388mV PB, OFF, f = 1kHz Gain difference from Gpin PB, OFF, f = 1kHz Vin = 0dB REC., B, f = 10kHz Vin = - 40dB REC., B, f = 5kHz Vin = - 30dB REC., B, f = 1kHz Vin = - 25dB REC., B, f = 10kHz Vin = 0dB REC., C, f = 1kHz Vin = - 60dB REC., C, f = 5kHz Vin = - 40dB REC., C, f = 300Hz Vin = - 30dB REC., C, f = 5kHz Vin = - 25dB REC., C, f = 15kHz Vin = 0dB REC., OFF, f = 1kHz VCC = 4.5V THD = 1% REC., OFF, f = 1kHz Vin = 0dB REC., C, f = 1kHz Vin = 0dB REC., C, Rg = 5.1k CCIR/ARM Weighted REC., OFF, C switch, REC. - OUT potential fluctuation min. 12 17 22 -1 510 9.4 6.7 4.2 - 1.1 18.1 11.5 8.7 3.5 - 8.3 12 typ. 16 19 24 0 570 10.4 8.2 5.7 0.4 19.6 13.5 10.7 5.5 - 6.3 13 0.02 0.13 60.0 -70 62.5 0 70 0.15 0.3 max. 20 21 26 1 Unit mA dB dB dB
640 mVrms 11.9 9.7 7.2 1.9 21.6 15.5 12.7 7.5 - 4.3 dB dB dB dB dB dB dB dB dB dB % % dB mV
Note 1) REC., OFF in the condition description, expresses that MODE is REC. and NR is OFF. The same for the following. Note 2) Obtain the input voltage of REC. - IN when the output voltage of REC. - OUT becomes 388mVrms. For this input voltage, the reference level in REC. is assumed 0dB. Note 3) Obtain the input voltage of PB. - IN when the output voltage of REC. - OUT becomes 388mVrms. For this input voltage, the reference level in PB is assumed 0dB.
ICs for Cassette, Cassette Deck
s Electrical Characteristics (Cont.) (VCC= 6V, Ta=25C 2C)
Parameter Channel Balance Total Harmonics Distortion Line Out Line Mute Attenuation Line Mute Offset Level Meter Output (1) Note 4) Level Meter Output (2) Level Meter Output (3) Level Meter Output Offset Delay Output (1) Symbol CB THDP Gmut Vofs - M VDC (1) VDC (2) VDC (3) Vofs - L VPS (1) Condition Gain difference between channels, Grin and Gpin PB, OFF, f = 1kHz Vin = 0dB, LINE - OUT PB, OFF, Mute ON f = 1kHz, Vin = 0dB Mute OFF ON switching, LINE - OUT potential fluctuation PB, OFF, LMG Normal f = 1kHz, Vin = - 3dB PB, OFF, LMG Normal f = 1kHz, Vin = +9dB PB, OFF, LMG High f = 1kHz, Vin = -18dB PB, OFF, LMG Normal No Input Vin = - 0.2V S30 C PB MPX off Piny and Pin#7 DC Potential Vin = + 0.2V S30 C PB MPX off Difference from VPS (1) Vin = - 0.2V S30 B PB MPX off Piny and Pin#7 DC Potential Vin = + 0.2V S30 B PB MPX off Difference from VPS (3) Vin = - 0.2V S30 A PB MPX off Piny and Pin#7 DC Potential Vin = + 0.2V S30 A PB MPX off Difference from VPS (5) min. -1 typ. 0 0.02 -85 -20 0.9 3.6 0.9 -15 2 0 1.0 4.0 1.0 0 3
AN7354SC
max. 1 0.15 -75 20 1.1 4.4 1.1 15 4
Unit dB % dB mV V V V mV V
Delay Output (2)
VPS (2)
4
6
8
V
Delay Output (3)
VPS (3)
- 0.1
0
0.1
V
Delay Output (4)
VPS (4)
- 0.2
0
0.2
V
Delay Output (5)
VPS (5)
-4
-3
-2
V
Delay Output (6) Note 4)
VPS (6)
4
6
8
V
LMG in the condition description is an abbreviation of Level Meter Gain.
AN7354SC
ICs for Cassette, Cassette Deck
s Electrical Characteristics (Ta=25C2C) [Design Reference Values]
The following characteristic values are reference values for design but not guaranteed values. Parameter Decreased Voltage Mute (1) Crosstalk, REC.- IN to LINE- OUT Crosstalk, PB- IN to REC.- OUT Crosstalk, Cannel to Cannel PB/REC. Control Voltage PB PB/REC. Control Voltage REC. MPX Control Voltage ON MPX Control Voltage OFF Meter Control Voltage Normal Meter Control Voltage Hi NR Control Voltage ON NR Control Voltage OFF B/C Control Voltage C B/C Control Voltage B Mute Control Voltage ON Mute Control Voltage OFF REC.- IN Input Resistance PB - IN Input Resistance Symbol Vmut (1) CT- RP CT- PR CT- CC VCPB VCREC. VCMon VCMoff VCMnor VCMhi VCON VCOFF VCC VCB VCMUon VCMUof Rin - RI Rin - PI Condition PB, OFF, Mute OFF, f=1kHz, Vin = 0dB Voltage between Pins1 and 42 when mute functions PB, OFF, f = 1kHz Vin = 0dB (At REC) PB, OFF, f = 1kHz Vin = 0dB (At PB) PB, OFF, f = 1kHz Vin = 0dB Pin35 applied DC voltage when PB, MPX are OFF Pin35 applied DC voltage when PB, MPX are ON Pin34 applied DC voltage when PB, MPX are ON Pin34 applied DC voltage when PB, MPX are OFF Pin33 applied DC voltage when Meter becomes Normal Pin33 applied DC voltage when Meter becomes Hi Pin8 applied DC voltage when NR is ON Pin8 applied DC voltage when NR is OFF Pin9 applied DC voltage for C-type NR Pin9 applied DC voltage for B-type NR Pin10 applied DC voltage when Mute is ON Pin10 applied DC voltage when Mute is OFF min. 4.4 typ. 6.4 -80 -80 -80 +2.5 -1.5 -1.5 +2.5 +2.5 -1.5 +2.5 -1.5 +2.5 -1.5 +2.5 -1.5 56.4 28.05 64 33 max. 8.4 -70 -70 -70 +6 +1.5 +1.5 +6 +6 +1.5 +6 +1.5 +6 +1.5 +6 +1.5 75.6 37.95 Unit V dB dB dB V V V V V V V V V V V V k k
ICs for Cassette, Cassette Deck
s Characteristics Curve
Consumption Current
32 30 Consumption Current (mA) 28 26 24 22 20 18 16 14 12 4.5 5.0 5.5 6.0 6.5 C type 10kHz + 10dB B type 10kHz + 10dB Encode Mode Ta= 25C C type Vin = 0 OFF 10kHz + 10dB B type Vin = 0 32 30 Consumption Current (mA) 28 26 24 22 20 18 16 14 12 4.5 5.0 5.5 B type 10kHz + 10dB C type 10kHz + 10dB Decode Mode Ta= 25C
AN7354SC
Consumption Current
C type Vin = 0 OFF 10kHz + 10dB B type Vin = 0 6.0 6.5
Supply Voltage VCC (V)
Supply Voltage VCC (V)
B - type Encode Characteristics
10 8 6 4 2 0 100 200 500 1k 2k 5k 10k -20dB -10dB 0dB 20k Ta= -30C Ta= 25C Ta= 80C VCC=12V -40dB Encode boost (dB) -30dB 20 16 12 8 4 0 -4
C - type Encode Characteristics
-60dB -50dB -40dB -30dB -20dB -10dB
Encode boost (dB)
Ta = -30C Ta = 25C Ta = 80C VCC =12V 100 200 500
1k
2k
5k
0dB 10k 20k
Frequency (Hz)
Frequency (Hz)
NR OFF Total Harmonics Distortion
5.0 Total Harmonics Distortion (%) 2.0 1.0 0.5 0.2 0.1 0.05 0.02 0.01 -30 -20 -10 0 10 20 Total Harmonics Distortion (%) Encode Mode VCC = 6V 100Hz 1kHz 10kHz 5.0 2.0 1.0 0.5 0.2 0.1 0.05 0.02 0.01 -30
B - type Total Harmonics Distortion
Encode Mode VCC = 6V 100Hz 1kHz 10kHz
-20
-10
0
10
20
Output Level (dB)
Output Level (dB)
C - type Total Harmonics Distortion
5.0 Total Harmonics Distortion (%) Encode Mode 2.0 VCC = 6V Signal Handling (dB) 1.0 0.5 0.2 0.1 0.05 0.02 0.01 -30 -20 -10 0 10 20 100Hz 1kHz 10kHz 26 24 22 20 18 16 14 12 10 8 6 4.5 Encode Mode f=1kHz THD=1%
Signal Handling
NR OFF B type C type 5.0 5.5 6.0 6.5
Output Level (dB)
Supply Voltage VCC (V)
AN7354SC
ICs for Cassette, Cassette Deck
Crosstalk
PB Mode to REC. Mode VCC = 6V 30kHz LPF -20 Crosstalk (dB) -40 -60 -80 -100 100 200 500 1k 2k 5k 10k 20k Crosstalk (dB) C type B type NR OFF -20 -40 -60 -80 -100 100 200 500
Crosstalk
REC. Mode to PB Mode VCC = 6V 30kHz LPF
C type B type NR OFF
1k
2k
5k
10k
20k
Frequency (Hz)
Frequency (Hz)
Crosstalk
REC. Mode to ch. to ch. VCC = 6V 30kHz LPF C type B type NR OFF
Crosstalk
PB Mode ch. to ch. VCC = 6V 30kHz LPF
-20 Crosstalk (dB) -40 -60 -80 -100
-20 Crosstalk (dB) -40 -60 -80 -100
C type B type NR OFF
100
200
500
1k
2k
5k
10k
20k
100
200
500
1k
2k
5k
10k
20k
Frequency (Hz)
Frequency (Hz)
Total Gain
PB IN to PB OUT (Mode : PB OFF) PB IN to REC. OUT (Mode : REC. OFF) REC. IN to PB OUT (Mode : REC. OFF) Total Gain (dB) 30 28 26 24 22 20 18 VCC = 6V 16 100 200 500 60 50 REC. IN to REC. OUT (Mode : REC. OFF) S/N (dB) 80 70 90 100 CCIR/ARM Rg= 5.1k
S/N
PB * B PB * C REC. * OFF PB. * OFF REC. * B
REC. * C
1k
2k
5k
10k
20k
4.5
5.0
5.5
6.0
6.5
Frequency (Hz)
Supply Voltage VCC (V)
Level Meter Characteristics
6 5 Output Voltage (V) 4 3 2 1 0 -40 Hi Gain Normal Gain 0 Output Level (dB) -10 -20 -30 -40 -50
Delay Circuit Characteristics
90 Phase (Degree)
0 -90
-60 V = 388mVrms (0dB) in -70 Mode : PB MPX ON VCC = 6V -30 -20 -10 0 10 100 200 500 1k 2k 5k 10k Input Level Vin (dB) Frequency (Hz)
-180 20k
ICs for Cassette, Cassette Deck
s Pin Description
Pin No. Pin Name Input Impedance Pin Voltage Pin Description
AN7354SC
Equivalent Circuit
1
VEE
-6V
Supply voltage (-)
42
VCC
6V
Supply voltage (+)
40
GND
0V
Ground neutral GND
VCC
33
METER Nor/Hi
100k 3.1V
Level meter Normal/Hi changeover switch pin
500
3k
3k
100k
-VCC
VCC
34
MPX OFF/ON
100k 3.1V
MPX OFF/ON changeover switch pin
500
20k
20k
100k
-VCC
VCC
35
PB/REC.
100k 3.1V
PB -Mode/ REC.-Mode changeover switch pin
500
3k
3k
100k
-VCC
AN7354SC
s Pin Description (Cont.)
Pin No. Pin Name Input Impedance Pin Voltage Pin Description
ICs for Cassette, Cassette Deck
Equivalent Circuit
VCC
100
2 41
REC. IN
66k neutral GND
Record input pin
66k 33k GND
-VCC VCC
3
IREF
7 -5V
Internal resistor error calibration pin
100
400
-VCC VCC
100
4 39
PB - IN
33k neutral GND
Playback input pin
33k
-VCC VCC
100
5 38
Delay
22k neutral GND
Delay circuit control pin
22k 22k
-VCC VCC
6 37
MPX OUT
70 -45mV
MPX drive amp. output pin
70
1k
1k -VCC
ICs for Cassette, Cassette Deck
s Pin Description (Cont.)
Pin No. Pin Name Input Impedance Pin Voltage Pin Description
AN7354SC
Equivalent Circuit
VCC
500
7 36
MPX IN
500 -30mV
MPX gain aux. amp. input pin
-VCC VCC
8
NR ON/OFF
100k3.1V
NR ON/OFF changeover switch pin
500 100k
23.6k
23.6k
-VCC VCC
9
C/B-type
100k3.1V
C/B type changeover switch pin
500 100k
23.1k
23.1k
-VCC VCC
10
Mute ON/OFF
100k 3.1V
Mute ON/OFF changeover switch pin
500 100k
3k
3k
-VCC VCC
7.35k 43
11 32
LINE OUT
43 neutral GND
Playback output pin
15k
-VCC
AN7354SC
s Pin Description (Cont.)
Pin No. Pin Name Input Impedance Pin Voltage Pin Description
ICs for Cassette, Cassette Deck
Equivalent Circuit
VCC
31
500 20k
12 31
METER IN
20k neutral GND
Level meter input pin
-VCC
GND VCC
100
500 20k
13 30
MUTE - IN
20k neutral GND
Mute input pin
GND -VCC VCC
1k
14 29
LEVEL
1k neutral GND
Level meter control pin
500
-VCC VCC
15 28
LINE MUTE OUT
63k neutral GND
Playback mute output pin
43
63k
-VCC VCC
16 27
METER OUT
1kneutral GND
Level meter output pin
1k 5.5k 4.7k 1k GND -VCC
ICs for Cassette, Cassette Deck
s Pin Description (Cont.)
Pin No. Pin Name Input Impedance Pin Voltage Pin Description
AN7354SC
Equivalent Circuit
VCC
17 26
VCR H
Neutral GND
HLS side chain control resistor pin
30
-VCC VCC
18 25
RECT H
-5.45V
HLS control signal smoothing pin
31
-VCC VCC
19 24
VCR L
Neutral GND
LLS side chain control resistor pin
30
-VCC VCC
20 23
RECT-L
-5.45V
LLS control signal smoothing pin
30
-VCC VCC
21 22
REC. OUT
56 neutral GND
56
Record output pin
-VCC
AN7354SC
s Precautions on Product Handling and Mounting
ICs for Cassette, Cassette Deck
The AN7354SC Package is dry-sealed, because thermal stress at solder mounting may adversely affect the product reliability due to the moisture absorption in the resin. Take into consideration the following instructions for its use : 1. After unpacking the dry sealing package, in order to reduce absorption of the resin, store the product under temperature of 30C or lower and RH65% or less, and perform its mounting within 5 days following the unpacking, except when only lead section is heated by such as hand soldering. In addition, after unpacking, put the remainder back into the laminate bag and seal the bag with tapes or similars. Unless the silica gel in the bag discolors (blue to pink), its quality is guaranteed within 10 days. 2. If the product is stored under the conditions more than the above, pre-bake it (for 6 hours or more under 125C, or for 48 hours more under 70C) before mounting. 3. About soldering method (1) Solder dip method Solder dip must be performed under as low temperature as possible not exceeding 260C and for as short time as possible not exceeding 5s. (2) Reflow method ((Remarks)) 1 Peak temperature : 230C or lower 2 Peak time : 10s or shorter 3 Do not sharply rise the temperature from pre-heat temperature (150C or lower) to peak temperature (230C). 4 Reflow process must be performed only once. Hand soldering method When only leads are simultaneously heated, soldering must be performed under as low temperature as possible not exceeding 300C and for as short time as possible not exceeding 20s. For any soldering method, do not use the chlorine flux. If the chlorine flux is used, residual chlorine may adversely affect the product reliability. Thoroughly clean the IC after mounting. Any flux remaining after mounting results in lead corrosion, degrading the product reliability. In addition, if supersonic waves are used for cleaning, particular care must be taken, because resonance may occur depending on the size of IC and printed board.
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