Sony CXA1599Q Datasheet

1-chip Cassette Deck

For the availability of this product, please contact the sales office.

Description

The CXA1599Q is an IC for audio cassette decks. All analog signal processing functions, except Dolby NR, are incorporated in a single chip. As a result, a double cassette deck system can be simply configured by adding a Dolby IC.

Features

• Electronic recording volume for setting recording

level (with a balance volume)

• Recording equalizer amplifier

(with calibration and low frequency boost functions)

• Recording mute function

(soft mute and fader possible)

• Playback head amplifier switch function

(deck A/B switch)

• NR pass amplifier (NR IN/PASS switch)

• Headphone amplifier with electronic volume

• Full-wave rectifier output amplifier for level meter

(with time constant function)

• HPF amplifier for AMS

(with BS/AMS gain switch function)

• Electronic switch for tape EQ selection

(120µs/70µs)

• Electronic switch for metal tape selection

• Electronic switch for normal/double speed dubbing

selection (only for recording equalizer)

• Line mute function

• Double cassette dubbing system can be easily

configured with this single IC.

CXA1599Q

48 pin QFP (Plastic)

Applications

Analog signal processing (except Dolby NR) for stereo analog cassette deck (ALPS ELECTRIC CO., LTD. HADKH-55460 head applicable)

Structure

Bipolar silicon monolithic IC

Absolute Maximum Ratings (Ta = 25°C)

• Supply voltage VCC 17 V

• Operating temperature Topr –20 to +75 °C

• Storage temperature Tstg –65 to +150 °C

• Allowable power dissipation PD 735 mW

Operating Conditions

Supply voltage VCC ±5.0 to ±8.0 V

(positive/negative dual power supply)

10.0 to 16.0 V

(single power supply)

Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits.

– 1 –

E92Y05-ST

Block Diagram

BOOST2

36

LINE OUT2

35

LINE OUT1

34

REC VOL

33

REC BAL

32

LINE IN2

31

LINE IN1

30

DECK A/B

29

28

A EQ

AMS BS

27

LINE MUTE

26

CXA1599Q

NR PASS

25

REC IN2

NR IN2

PASS IN2

PB OUT2

VOL OUT2

GND (VG)

I REF

VOL OUT1

PB OUT1

PASS IN1

37

38

39

40

41

42

44

45

46

43

REC EQ

2

PB EQ

GND (VG)

BIAS

PB EQ

2

5

B EQ

24

REC VOLREC VOL

MODE

CONTROL

2

35

34

4

23

METAL

22

SPEED

21

REC MUTE

2

39

NR/PASS

2

AMS/BS

2

20

AMS OUT

19

DVccDGNDVccV

DVcc

METER

18

46

DGND

NR/PASS

17

16

15

Vcc

V

EE

PVEE

2

PB HEAD PB HEAD

METER

HEADPHONE

AMP

EE

PV

NR IN1

REC IN1

47

48

REC EQ

BOOST1

2

REC OUT1

CALIBRATION

3

REC OUT2

REC

4

GP CAL

5

REC CAL

6

PB INB1

7

PB INB2

8

PB INA1

HEADPHONE

9

PB INA2

AMP

10

HP VOL

11

HP OUT1

Signal line Control line

121

HP OUT2

14

13

METER2

METER1

– 2 –

CXA1599Q

Pin Description (Ta = 25°C, Vcc = 7V, VEE = –7V, DVcc = 5V, No signal)

Symbol

No.

136BOOST1

BOOST2

23REC

OUT1 REC OUT2

DC

voltage

I/O

resistance

0.0V — 9.5kΩ

0.0V O 0Ω

I/O

Equivalent circuit Description

Connects the external capacitor for low frequency boost of recording equalizer amplifier.

∗

When low frequency boost is not executed: During positive/ negative dual power supply

→ Connect to GND. During single power supply

EE

→ Connect a

capacitor

36

VCC

× 2

500

4.8K

1

VEE

34k

VGS

5.5k

× 4

500

V

(over 3.3µF).

VCC

× 3

200

2

3

200

× 3

× 8

VCC

50k

5P

Output of recording equalizer amplifier.

4

GP CAL

2.5V

(During OPEN)

I 54kΩ

VEE

4

VCC

VEE

54k

VEE

DREF

VCC

VEE

Calibration for high frequency gain of recording equalizer amplifier. Controls by applying the DC voltage of DGND to DVcc. High → Gain up Low → Gain down

∗

When high frequency calibration function is not used, keep pin open.

– 3 –

CXA1599Q

Symbol

No.

REC

5

CAL

6

PB INB1

7

PB INB2

8

PB INA1

9

PB INA2

3748REC IN2

REC IN1

3847NR IN2

NR IN1

DC

voltage

2.5V

(During

OPEN)

0.0V

I/O

resistance

I 54kΩ

50kΩ

I

Equivalent circuit Description

Calibration for overall

VCC

frequency gain of

VCC

recording equalizer amplifier. Controls by applying the DC voltage of DGND to

5

54k

× 3

DREF

VEE

DVcc. High → Gain up Low → Gain down

∗

When recording

VEE

calibration function is not used, keep this pin open.

VCC

6 7 8 9

50k

37 48

38

47

VGS

VEE

VCC

VGS

Input of playback equalizer amplifier.

Input of recording equalizer amplifier.

Input pin for connecting

VEE

Dolby line (decode) output signal.

10 33

HP VOL REC VOL

0.0V

(During

OPEN)

I 100kΩ

VCC

Pin 10: Control for

CC

V

headphone volume Pin 33: Control for

10

33

60k

40k

× 8

recording volume Controls by applying the DC voltage of DGND to DVcc for each pin.

DGND

VEE

High → Volume up

VEE

Low → Volume down

– 4 –

CXA1599Q

Pin No.

11 12

Symbol

HP OUT1 HP OUT2

DC

voltage

I/O

resistance

0.0V O 0Ω

I/O

Equivalent circuit Description

VCC

10K

45k

5P

Output of headphone volume

VEE

VCC

11 12

× 35

VEE

VCC

× 35

10P

× 4

× 11

× 4

× 7

1k

500

3k

1k

PVEE

METER1

13 14

15 16

METER2

PVEE VEE

0.0V O —

–7.0V — —

17 Vcc 7.0V — —

18 DGND 0.0V — —

13

14

VEE

VCC

150

17

18

15

16

× 11

10k

To PVEE

To VEE

To VCC

To DGND

Output of level meter amplifier

VEE

During positive/negative dual power supply → Connect to negative

power supply.

During single power supply → Connect to GND.

Positive power supply.

Connect to GND.

VCC

19 DVcc 5.0V — 60kΩ

15k

× 2

500

× 4

To each DREF

VEE

Power supply for control.

19

30k

DGND

VEE

– 5 –

CXA1599Q

No.

20

21

Symbol

AMS OUT

REC MUTE

DC

voltage

I/O

resistance

0.0V O 0Ω

—I —

21

20

VCC

VEE

Equivalent circuit Description

VCC

500

× 2

16k

VCC

VGS

4k

Output of AMS/BS amplifier.

VEE

500

× 4

EE

V

Mute ON/OFF switch of recording equalizer

VCC

amplifier. Controls by applying the DC voltage of DGND to

× 3

30k

× 3

DREF

DVcc. High → Mute OFF Low → Mute ON

∗

Soft mute/fader switch is possible by changing

VEE

the time constant of the external time constant circuit.

22

23

26

27

29

SPEED

METAL

LINE MUTE

AMS BS

DECK A/B

—I —

23 26 27 29

22

VCC

VEE

10k

VCC

DGND VEE

Tape speed switch High → High speed Low → Normal speed

Deck B metal tape switch High → Metal tape Low → Norm, CrO2 tape

Line mute ON/OFF switch High → Mute OFF Low → Mute ON

AMS/BS switch High → AMS mode Low → BS mode

Deck A/B playback switch High → PBINB Low → PBINA

– 6 –

CXA1599Q

No.

24

25

28

30 31

Symbol

B EQ

NR PASS

A EQ

LINE IN1 LINE IN2

DC

voltage

I/O

resistance

—I —

0.0V I 0Ω

Equivalent circuit Description

VCC

Deck B equalizer switch High → 70µs EQ

(CrO2 tape)

Low → 120µs EQ

(Norm tape)

24 25 28

10k

NR/PASS input switch High → PASS IN Low → NR IN

DGND VEE

VEE

Deck A equalizer switch High → 70µs EQ Low → 120µs EQ

× 2

VCC

Line input.

× 2

47kΩ resistance connected externally.

VEE

VCC

30 31

5k

VGS

VEE

VGS

× 7

3k3k

× 7

× 2× 2

32

REC BAL

2.5V

(During OPEN)

VCC

Balance control of

70k

32

I

100kΩ

30k

11k

21K

11k

× 6× 6

recording volume Controls by applying the DC voltage of DGND to DVcc. High → VOL OUT1

DREF

VEE

Low → VOL OUT2

V

EE

– 7 –