Panasonic AN7356NSC Datasheet

ICs for Cassette/Cassette Deck Use

AN7356NSC

Recording and playback equalizer amp. IC for Hi-Fi cassette deck

■ Overview

The AN7356NSC is an audio signal processing IC for analog cassette deck. All the recording and playback processing can be realized with one chip.

■ Features

• 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

■ Applications

• Cassette deck (Hi-Fi)

1

0.45

0.35±0.1

1.0

21

0.1±0.1

0.3

42

22

9.5±0.3

11.5±0.3

SSOP042-P-0450A

0.15

Unit: mm

2.0±0.2

0.9

21.25±0.3

1

AN7356NSC ICs for Cassette/Cassette Deck Use

■ Block Diagram

−V

EE

T1

T2

PB out

V

CC

Rec.in

1

2

3

4

PBPB

EQ-VR EQ-VR

5

VCA

REG

VCA

6

LPF

7

600

8 9

Rec.

10 11 12

Q/FF/FR

Fm/GH

L-boost

Q/FF/FR

Fm/GH

13 14

VCA

L-boost

LPF

600

VCA

42

41

40

39

38

37

36

35 34

33 32 31 30 29

GND

T1

T2

PB out

Rec. in

V

OUT

I

OUT

Bias 1

Bias 2

FET

15

16

17

18

19

DAC DAC S/P S/P

DA

L

DA

L

DA

L

DA

L

28

27

26

25

24

V

OUT

I

OUT

Inj.

V

DD

D-GND

Address

−V

EE

20

Shift register

21

I

E

23

22

S-data

CLK

2

ICs for Cassette/Cassette Deck Use AN7356NSC

■ Pin Descriptions

Pin No. Description

1 Negative supply pin 2 Playback amp. TAPE1 input 3 Playback amp. TAPE2 input 4 Playback amp. negative feedback input 5 Playback amp. equalizer pin 6 Playback amp. negative feedback output 7 LPF pin 8 Playback amp. output

9 Positive supply pin 10 Recording amp. non-inverting input 11 Low frequency band boost pin 12 DAC output pin(Addr.: 02) 13 Recording equalizer amp. output 14 Recording volume amp. input 15 Recording amp. voltage output 16 Recording amp. current output 17 DAC output pin(Addr.: 0A) 18 DAC output pin (Addr.: 09) 19 FET drive current output 20 Negative supply pin 21 Erase current output

Pin No. Description

22 Clock input 23 Serial data input 24 GND pin 25 Positive supply pin 26 Injector current pin 27 Recording amp. current output 28 Recording amp. voltage output 29 Recording volume amp. input 30 Recording equalizer amp. output 31 32 Low frequency band boost pin 33 Recording amp. non-inverting input 34 DAC calibration pin 35 Playback amp. output 36 LPF pin 37 Playback amp. negative feedback output 38 Playback amp. equalizer pin 39 Playback amp. negative feedback input 40 Playback amp. TAPE2 input 41 Playback amp. TAPE1 input 42 GND pin

■ Absolute Maximum Ratings

Parameter Symbol Rating Unit

Supply voltage V

Supply current I

2

Power dissipation Operating ambient temperature Storage temperature

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.

*

1

*

1

*

CC

V

DD

CC

P

D

T

opr

T

stg

±7.7 V +7.7

 mA

443 mW

−25 to +75 °C

−55 to +150 °C

■ Recommended Operating Range

Parameter Symbol Range Unit

Supply voltage V

CC

V

DD

±4.5 to ±6.5 (typ.) to ±7.2 V

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

Playback system VIN = −56 dBV, f = 1 kHZ, 30 kHz LPF on Reference output level Reference output level (+6 dB)

Reference output level (−6 dB)

Level difference between ∆G tapes

Total harmonic distortion (T1, 0 dB) Total harmonic distortion (T2, 0 dB) Output noise voltage (T1, 0 dB) Output noise voltage (T2, 0 dB) Maximum output level (0 dB) Cross talk (ch. R → ch. L) CT Cross talk (ch. L → ch. R) CT Output offset voltage (0 dB) V Mute attenuation (T2) G Mute attenuation (T1) G Mute attenuation (T2) G Pulse noise voltage ∆V EQ-VR (120 µ)V EQ-VR (70 µ)G

EQ-VR (50 µ)G

600 Hz LPF (50 µ)G

T1/T2 switching shock noise ∆V

Recording system Reference output (EQ output) Middle and high High G frequency gain Low ∆G

High frequency High G peak gain Low ∆G

(0 dB) V

THD1VIN = −64 dBV, 30 kHz LPF on  0.12 0.4 % THD2VIN = −64 dBV, 30 kHz LPF on  0.12 0.4 %

V V

V

1

G

H

G

L

T12

NO1

NO2

OMX

1

2

OFF

M0

M1

M2

P

EQ120

EQ70

EQ50

LPF

T12

EQ

HH

HL

PH

PL

−3.4 −1.4 0.6 dBV Data(1) Difference between 6 dB and 0 dB

5.0 6.0 7.0 dB Data(2)

GH = data (2)−data (1) Difference between −6 dB and 6 dB

10 11.8 13.5 dB Data(3)

GL = data (2)−data (3) Operation: The above reference output

 01dB

level (V1) difference between tapes

IHF−A, Rg = 2.2 kΩ−69 −56 dBV IHF−A, Rg = 2.2 kΩ−69 −56 dBV THD = 3% 2.0 3.6  dBV Rg (CH2) = 220 Ω 60 dB Rg (CH1) = 220 Ω 60 dB Rg = 220 Ω−450 +130 mV DAC5 = (08) 60 dB T2 mode 60 dB T1 mode 60 dB Rg = 2.2 kΩ09mV f = 10 kHz −7.3 −5.3 −3.3 dBV Data(17) f = 10 kHz −5.0 −4.0 −3.0 dB Data(18)

G

= data (18)−data (17)

EQ70

f = 10 kHz −8.5 −7.5 −6.5 dB Data(19) G

= data (19)−data (17)

EQ50

f = 10 kHz −25 −20 dB Data(23) G

= data (23)−data (19)

LPF

Operation: The above output offset voltage (V

) difference between tapes

OFF

−55 0 55 mV

fIN = 400 Hz, VIN = 6 dBV −3 −0.5 2.0 dBV V (400 Hz) = 0 dB fIN = 10 kHz 3.0 5.0 7.0 dB

V

= −12 dBV

∆GHL = data

IN

10 13 15

Data (32H) Data (32L)

(32H)−data (32L) V(400 Hz) = 0 dB fIN = 25 kHz 18 21 22 dB

= −30 dBV

V

∆GHL = data

IN

18 12 24

Data (33H) Data (33L)

(33H)−data (33L)

4

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

Recording system (continued) High frequency peak

bandwidth (10 kHz output)

High frequency peak frequency DAC control Volume amp. gain High G (VOL output) Low ∆G

Total harmonic VOL THD distortion RLV = 10 kΩ

Maximum output VOL V voltage CURR V Output noise voltage V

(curr. output) IHF-A Input muting attenuation IM

(EQ output) Output offset voltage V

(curr. output) Output muting attenuation OM

(VOL output) DAC (GTL) = (10) Pulse noise voltage V

(curr. output) Logic system Bias output (low) V

Bias control width ∆V

Current consumption Analog +V Digital +V

−V

CC

DD

EE

Wide G NAR ∆G

High D

Low D

CURR THD

O-RV

O-RC

N-RC

OF-EQ

OF-RC

PN

I

VCC

I

VDD

I

VEE

V(25 kHz) = 0 dB

QW

∆GHL = data (34W)

QL

−Data (34N) fIN = 44 kHz

fPH

fIN = 11 kHz (0D) (10) (13)

fPL



TH

∆GTL = data (36H)

TL

−data (36L)

RVVIN

RCVIN

= −14 dBV fIN = 1 kHz  0.3 0.8 %

= −20 dBV  0.3 0.8

f

(peak)

= 25 kHz

2.7 4.7 6.7 dB

f = 35 kHz 14 16 18 VIN = −18 dBV

VIN = −30 dBV

VIN = −18 dBV

(2D) (30) (3B) 

17 19 21 dB

fIN = 1 kHz 16.3 18.3 20.3 (VR input)

RLV = l kΩ RLV = 10 kΩ fIN = 1 kHz 2.2 3.2  V[rms] RLV = 1 kΩ THD = 3% 1.0 1.5  Rg = 0 Ω, RLV = 1 kΩ0.45 2

EQfIN

= 1 kHz, VIN = −6 dBV 40 dB

−500 +900 mV

−25 +25 µA

RVfIN

= 1 kHz, VIN = 0 dBV 60 dB

(RC) Rg = 0 Ω−9 +9

DAC09 = (00) −2.5 −1.9 1.5 V

BL

DAC0A = (00) Data(45) DAC09 = (FF), DAC0A = (FF) 4.2 4.7 5.2 V

BH

Data(46)−data(45) Data(46)

Without input 21 28 34 mA DC Without input 0.7 1.5 2.3 mA DC Without input −40 −36 −31 mA DC

Data(34W) Data(34N)

Data(36H)

Data(36L)

mV[rms]

mV[p-0]

DC voltage

5