Sony CXA1202R, CXA1202Q-Z Datasheet

REC/PB Amplifier for VCR

Description

CXA1202Q-Z/CXA1202R are bipolar ICs developed

as REC/PB amplifiers for VCR's.

Features

• Built-in head amplifier feedback dumping con-

tributes to the reduction of external components
and simplification of the print circuit board design.

• Built-in BPF for PB signals medium range frequency
compensation totally eliminates external resonance
circuits (L. C. R.)

• Low range recording signal variable-level mix
amplifier allows for both metal powder and metal
evaporated tapes application.

• Consumption saving through power save function
of the REC AMP.

• 4-head system switch incorporated.

Functions

• Recording: 2-channel REC AMP, 5-input (Y, Chroma, AFM, ATF, PCM) Mix AMP.

• Playback: 2-channel low-noise head amplifier, medium range frequency compensation circuit, RF AGC,

dropout detecting circuit.

Structure

Bipolar silicon monolithic IC

Applications

• 8-mm system VCR

• β-system VCR

• VHS-system VCR

Absolute Maximum Ratings (Ta = 25°C)

• Supply voltage Vcc 8 V

• Operating temperature Topr –10 to +75 °C

• Storage temperature Tstg –55 to +150 °C

• Allowable power dissipation PD (CXA1202Q-Z) 920 mW

PD (CXA1202R) 1100 mW

(CXA1202R: Substrate area 40 × 25mm2, t = 0.635mm when ceramic print circuit board mounted)

Recommended Operating Condition

Supply voltage Vcc 5 ± 0.25 V

– 1 –

E88012-PS

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.

CXA1202Q-Z/CXA1202R

CXA1202Q-Z

48 pin QFP (Plastic)

CXA1202R

48 pin LQFP (Plastic)

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

– 2 –

CXA1202Q-Z/CXA1202R

Block Diagram and Pin Configuration

ATF LEVEL

VCA

6dB

DOC

DET

BPF BPF

CONTROL

LOGIC

RP PB EN

C IN

VREG

AFM IN

VG

Y IN

V

CC

PCM RF OUT

AGC TC

AGC OUT

HCHG

RF IN A

2

3

4

5

6

7

8

9

10

12

1

MIX1 OUT

MT1

MULTI

GND 1CH

V RF OUT

GND PB

DOC IN

V

CC EF

RF OUT

DOC TC

RF IN B

DOC PULSE

13

14

15

16

17

18

19

20

21

22

23

24

MIX2 OUT

MT 2

RF SWP

GND 2CH

PCM SEL

ME LEVEL

GND REC

RP PB 1CH

ATF IN

RP PB 2CH

PCM IN

40

39

38

37

41

42

43

44

45

46

47

48

REC2 IN

MT Q

V

CC

2CH

REC2 OUT

PB IN 2P

PB IN 2N

PB IN 1N

PB IN 1P

REC1 OUT

V

CC

1CH

MT Fφ

REC1 IN

36

35

34

31

32

33

25

2627

28

29

30

CH2
REC AMP

CH1
REC AMP

CH1
HEAD AMP

46dB

9dB

CH2
HEAD AMP

46dB

9dB

VP2
SW

VP1
SW

P V P V

–6dB

MTFφ

MTQ

MT2

MT1

–6dB

CH2
CH1

Mute

Video
SW

6dB

DOC
DET

12dB

GCA

A B

RF SW

CH2 CH1
PCM

SW

MIX
AMP

6dB

RF
AGC

DET

11

ME

LEVEL

VCAVCA

ATF

SW

Medium range freq.
compensation

VCA VCA

Multi

Normal

– 3 –

CXA1202Q-Z/CXA1202R

Pin Description

No.

1

2

3

4

5

6

7

8

RP PB EN

C IN

VREG

AFM IN

VG

Y IN

Vcc

PCM RF
OUT

(Open:

"L")

3.2V

4.2V

3.2V

2.5V

3.2V

5.0V

1.8V

—

134

mVp-p

—

80

mVp-p

—

250

mVp-p

—

50 to

500

mVp-p

40kΩ

20kΩ

—

20kΩ

—

20kΩ

—

Emitter

follower

(IE = 1mA)

Symbol

Equivalent circuit

Description

I/O

resistance

DC

AC

Voltage

1

V

CC

GND

40k

20k

VCC

GND

20k

2

100

VCC

GND

3

24k

35k

VCC

GND

2.5k

150

5

1mA

VCC

GND

8

440

Power-save recording at Low.

High: over 3V
Low: under 1V

Input pin for Chroma signal.

Output pin for VREG 4.2V.
Decoupling with capacitance.

Input pin for AFM signal.

Output pin for virtual GND.
Decoupling with capacitance.

Input pin for Y signal.
Supply pin for circuits other than

REC AMP and Head AMP.

Output pin for PB PCM signal.

Same as for Pin No. 2

Same as for Pin No. 2

—

– 4 –

CXA1202Q-Z/CXA1202R

No.

9

10

11

12

13

14

15

AGC TC

AGC OUT

HCHG

RF IN A

DOC
PULSE

RF IN B

DOC TC

4.25V
(Load:
150kΩ

2.5V

—

(Open:

"L")

2.5V

H: 3.2V
L: 0V

2.5V

2.5V

—

100

mVp-p

—

100

mVp-p

—

100

mVp-p

—

—

Emitter

follower

(IE = 1mA)

50kΩ

—

Emitter
follower
(H: IE =

1mA)

20kΩ

—

Symbol

Equivalent circuit

Description

I/O

resistance

DC

AC

Voltage

VCC

500

200

GND

9

200

1mA

VCC

GND

200

10

17

VCC

GND

11

50k

VCC

GND

150

20k

5

12

VCC

GND

100

80k 3.5k

13

VCC

GND

90

8k

15

3.3k

Pin to apply time constant of
envelope detection for RF AGC.
Optimum load resistance across
Vcc is 150kΩ.

AGC output pin for PB VIDEO
signal (Max. gain of AGC AMP is
about 7dB).

Control signal input pin for RF SW
switching:

High (over 3V): selects RF IN A
Low (under 0.3V):

selects RF IN B

Input pin for RF switch and 12dB
AMP.

Dropout detection signal output
pin; High upon dropout.

Input pin for RF switch and 12dB
AMP.

Pin to connect time constant of
dropout detection.

Same as for Pin No. 12

– 5 –

CXA1202Q-Z/CXA1202R

No.

16

17

18

19

20

21

22

23

RF OUT

Vcc EF

DOC IN

GND PB

V RF OUT

GND 1CH

MULTI

MT1

2.5V

5.0V

2.5V

0V

1.8V

0V

—

(OPEN:

"L")

—

(2.5V

at

OPEN

of pin)

400

mVp-p

—

400

mVp-p

—

50 to

500

mVp-p

—

—

—

Emitter

follower
(IE =
500µA)

—

8kΩ

—

Emitter

follower
(IE =
500µA)

—

40kΩ

100kΩ

Symbol

Equivalent circuit

Description

I/O

resistance

DC

AC

Voltage

500µA

VCC

GND

200

16

VCC

GND

200

17

VCC

GND

150

8k

18

2.5V

VCC

GND

400

20

500µA

VCC

GND

25k

23

47k 53k

5

Output pin of signal selected by
HCHG from RF IN A and RF IN B.

Supply pin for emitter followers of
AGC OUT, DOC TC and RF OUT.

Input pin for dropout detection.

GND pin for medium range
frequency compensation circuit,
RF AGC and DOC DET.

Output pin for PB VIDEO signal.

GND pin for CH1 REC AMP and
CH1 Head AMP.

Multi-channel PCM REC mode at
High.

Boost level adjusting pin for CH1
medium range frequency
compensation circuit.
Variable between 0 and +12dB at

4.2 to 0.8V.

—

—

Same as for Pin No. 1

– 6 –

CXA1202Q-Z/CXA1202R

No.

24

25

26

27

28

29

30

MIX1 OUT

REC1 IN

MT Fφ

Vcc 1CH

REC1 OUT

PB IN 1P

PB IN 1N

2.5V

1.8V

2.5V

5.0V

15mA

2.4V

2.4V

203

mVp-p

92µA

(Y signal)

—

—

13

mAp-p

90 to

900

µVp-p

—

Emitter
follower

(IE = 1mA)

~

–

0

—

—

Open

collector

1.3kΩ

1.3kΩ

Symbol

Equivalent circuit

Description

I/O

resistance

DC

AC

Voltage

1mA

VCC

GND

400

24

VCC

GND

100

200

100

25

VCC

GND

90

26

GND

20

28

VCC

GND

10k

29

VCC

GND

30

Mix circuit output pin for CH1.

CH1 REC AMP input pin.

Fφ adjusting pin for medium range
frequency compensation circuit;
Fφ is controlled through current
value by connecting resistance
between GNDs. Mutually affected
by MT Q. Do not connect
capacitance.

Power supply pin for CH1 REC
AMP and CH1 Head AMP.

CH1 REC AMP output pin.

CH1 head AMP positive phase
input pin (PB signal input pin).

CH1 Head AMP inverter phase
input pin (decoupling with
capacitance).

—

– 7 –

CXA1202Q-Z/CXA1202R

No.

31

32

33

34

35

36

37

38

39

40

41

42

PB IN 2N

PB IN 2P

REC2 OUT

Vcc 2CH

MT Q

REC2 IN

MIX2 OUT

MT 2

RF SWP

GND 2CH

PCM SEL

ME LEVEL

2.4V

2.4V

15mA

5.0V

2.5V

1.8V

2.5V

—

(2.5V

at

OPEN

of pin)

—

(Open:

"L")

0V

—

(Open:

"L")

—

(2.1V

at

OPEN

of pin)

—

90 to

900

µVp-p

13

mAp-p

—

—

92µA

(Y signal)

203

mVp-p

—

—

—

—

—

1.3kΩ

1.3kΩ

—

—

~

–

0

Emitter

follower

(IE = 1mA)

100kΩ

40kΩ

—

40kΩ

100kΩ

Symbol

Equivalent circuit

Description

I/O

resistance

DC

AC

Voltage

VCC

GND

24k 76k

2.1V
18k

42

CH2 Head AMP Inverter phase
input pin (decoupling with
capacitance).

CH2 Head AMP positive phase
input pin (PB signal input pin).

CH2 REC AMP output pin.
Power supply pin for CH2 REC

AMP and CH2 Head AMP.
Q adjusting pin for medium range

frequency compensation circuit.
Controls Q through current value
by connecting resistance between
GNDs; Mutually effected by MT
Fφ. Do not connect capacitance.

CH2 REC AMP input pin.

Mix circuit output pin for CH2.

Boost level adjusting pin for CH2
medium range frequency
compensation circuit; variable
between 0 and +12dB at 4.2 to 0.8V.

RF switching pulse input pin for
CH switchover.

GND pin for CH2 REC AMP and
CH2 head AMP.

PCM AREA input pin;

High: PCM REC period
During High period after recording,
MUTE is applied to PB VIDEO
output.

Level of low range REC signals
(Chroma, AFM, ATF rec. with
VIDEO) can be boosted by 0 to
3dB by voltage (0 to 5V) applied
to this pin.

Same as for Pin No. 30

Same as for Pin No. 29

Same as for Pin No. 28

Same as for Pin No. 26

Same as for Pin No. 25

Same as for Pin No. 24

Same as for Pin No. 23

Same as for Pin No. 1

Same as for Pin No. 1

—

—

– 8 –

CXA1202Q-Z/CXA1202R

No.

43

44

45

46

47

48

GND REC

ATF
LEVEL

RP PB
1CH

ATF IN

RP PB
2CH

PCM IN

0V

—

(2.1V

at

OPEN

of pin)

—

(Open:

"L")

2.5V

—

(Open:

"L")

3.2V

—

—

—

250

mVp-p

—

250

mVp-p

—

100kΩ

40kΩ

20kΩ

40kΩ

20kΩ

Symbol

Equivalent circuit

Description

I/O

resistance

DC

AC

Voltage

VCC

GND

20k

100

5

46

GND pin for VG, VREG, LOGIC
and mix circuit.

REC Ievel of ATF signal can be
boosted by 0 to 3dB by the voltage
(0 to 5V) applied to this pin.
In multi PCM mode, priority given
to 6dB AMP.

REC/PB switchover signal for CH1:

High: PB

Low: REC
However, when RP PB EN pin is
at Low:

High: power save REC

Low: REC

Input pin for ATF pilot signal.

REC/PB switchover signal for CH2:

High: PB

Low: REC
However, when RP PB EN pin is
at Low:

High: power save REC

Low: REC
Input pin for PCM signal.

—

Same as for Pin No. 42

Same as for Pin No. 1

Same as for Pin No. 1

Same as for Pin No. 2