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Sony Semiconductor Electronic Components Datasheet

CXA1498S Datasheet

Recording/Playback Equalizer Amplifier for Stereo Tape Recorder

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CXA1498S/M
Recording/Playback Equalizer Amplifier for Stereo Tape Recorder
Description
The CXA1498S/M is a bipolar IC designed as
equalizer amplifier for tape redorder recording/
playback. This IC is particularly well-suited for double
cassette deck applications. An on-chip filter serves to
greatly reduce the number of external parts.
Features
Recording equalizer amplifier × 2
(Monolithic filter eliminates the need for external
resonance circuit)
AGC (automatic gain control) × 2
Playback equalizer amplifier × 2
(Variable resistor eliminates the need for external
feedback resistor)
Electronic switch for playback head
(Changes between A and B decks)
Electronic switch for tape equalization
(120µs/70µs) (Independently for A and B decks)
Electronic switch for metal tapes
Electronic switch for normal/high speed dubbing
(Effective for both REC EQ and PB EQ)
Recording mute function
(Soft mute is possible through use of an external
time constant circuit)
DC controllable for fade IN/OUT
(Controls recording mute function)
Playback mixing output pin provided
(For tune selection)
Use of this IC simplifies the construction of double
cassette dubbing system
Block Diagram and Pin Configuration (Top View)
CXA1498S
30 pin SDIP (Plastic)
CXA1498M
30 pin SOP (Plastic)
Applications
Recording/playback equalizer amplifier, playback
mixing amplifier and AGC for analog stereo tape
recorders
Structure
Bipolar silicon monolithic IC
Absolute Maximum Ratings (Ta = 25°C)
Supply voltage
VCC 12 V
Operating temperature Topr –20 to +75 °C
Storage temperature
Tstg –65 to +150 °C
Allowable power dissipation
PD SDIP
930 mW
SOP
630 mW
Recommended Operating Condition
Supply voltage
VCC 4.5 to 10.0 V
30 29 28 27 26 25 24 23 22 21
PB IN1 PB IN2 PB FB1 PB FB2
PB RFS RFC DECK DECK REC
100k
OUT
A/B -A EQ MUTE
20 19 18
VG AGC REC
30k IN
210k
DECK
A/B
DECK- B PB
DECK- A
PB EQ
CONTROL
30k
MUTE
CONT
VGS
17 16
VCC REC
OUT
VCC
REC EQ
DECK- A
DECK
A/B
DECK- B PB
210k
BIAS &
I REF
REC EQ
CONTROL
AGC DET
REC EQ
GND
100k
PB IN1 PB IN2 PB FB1 PB FB2
123 4
PB
OUT
5
MS
DECK
AGC
REC
OUT I REF SPEED -B EQ METAL
TC AGC
IN GND
6 7 8 9 10 11 12 13 14
REC
OUT
15
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–
E91860C49-ST


Sony Semiconductor Electronic Components Datasheet

CXA1498S Datasheet

Recording/Playback Equalizer Amplifier for Stereo Tape Recorder

No Preview Available !

CXA1498S/M
Pin Description and Equivalent Circuit
Pin
No.
Symbol
DC
voltage
I/O
I/O
resistance
Equivalent circuit
(Ta = 25°C, VCC = 8V, no signal)
Description
VCC RFS
1 PBIN1 L
2 PBIN2 L
29 PBIN2 R
30 PBIN1 R
0V1
I
1 147
2
29
30
GND
×6
×2
×6
Playback equalizer
amplifier input pins.
3
28
PBFB1 L
PBFB1 R
0.8V1
68k
5
26
PBOUT L
PBOUT R
2.5V1
O
147
VCC
10p
10p
147
3
28 × 6 × 6
×4
GND
VCC
×3
RFS
7k VCC
×5
500 147
500 210k
10k
×6
5
26
10k
100k
To 26 5
Playback equalizer
amplifier negative
feedback pins.
Playback equalizer
amplifier output pins.
4
27
PBFB2 L
PBFB2 R
2.5V1
VCC
4
147
×5
7k
×5
27
GND
RFS
Connection pins for
the capacitor that
determines the
playback equalizer
amplifier's time
constant
(120µs, 70µs, etc.)
6 MS OUT 2.5V1 O 147
VCC
×2
147 500 5k
6
500
×4
GND
VCC
Mixed output pin for
the L and R outputs of
the playback equalizer
amplifier.
–2–


Part Number CXA1498S
Description Recording/Playback Equalizer Amplifier for Stereo Tape Recorder
Maker Sony Corporation
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CXA1498S Datasheet PDF






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