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Sony Semiconductor Electronic Components Datasheet

CXA1897Q Datasheet

Dolby B Type Noise Reduction System with Recording/Playback Equalizer

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CXA1897Q pdf
CXA1897Q
Dolby B Type Noise Reduction System with Recording/Playback Equalizer
Description
The CXA1897Q is an analog signal processing IC
for tape recorders. It achieves whole processing
operations for the recording and playback systems
which include the Dolby B noise reduction function
on a single chip. This IC supports 2 channels at
each function.
48 pin QFP (Plastic)
Features
Dolby B noise reduction supports 1.7 times normal
speed.
Recording/playback equalizer amplifier supports
1.7 times normal speed.
Built-in comparator for AMS (automatic music
sensor)
Built-in AGC (automatic gain control) with amplifier
for MPX filter.
Playback equalizer outputs independently for
DECK-A and DECK-B.
Externally adjustable recording equalizer Gp and
fp.
Built-in Recording mute function.
Double cassette dubbing system can be easily
configured just with this IC.
Absolute Maximum Ratings (Ta=25°C)
Supply voltage
VCC
12
Operating temperature Topr –20 to +75
Storage temperature Tstg –65 to +150
Allowable power dissipation
PD 735
V
°C
°C
mW
Operating Conditions
Supply voltage
VCC 6.5 to 10.0
V
Applications
All analog signal processing in cassette deck parts
of tape recorders and compact music centers
(Sankyo Seiki mfg. Co., Ltd. YK47R-KF202 or
equivalent which has the same head type.)
Structure
Bipolar silicon monolithic IC
These ICs are available only to the licensees of Dolby Laboratories Licensing Corporation from whom licensing and applications
information may be obtained.
"Dolby" and the double D symbols are trade marks of Dolby Laboratories Licensing Corporation.
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—
E93930D78


Sony Semiconductor Electronic Components Datasheet

CXA1897Q Datasheet

Dolby B Type Noise Reduction System with Recording/Playback Equalizer

No Preview Available !

CXA1897Q pdf
Block Diagram
GND
+
GND
DECK A
PB HEAD
GND
++
GND
+
CXA1897Q
48 47 46 45 44 43 42 41 40 39 38 37
Vcc
1
AMS
OUT
Vcc
RFC 2
3
AMS GAIN
4
AGC IN
GND
10k
5
MPX
6
AGC
OUT 7
D REC IN1
8
D IREF
D PB IN1
9
DOLBY NR
ON/OFF/HI
D L OUT1
10
11
12
TC
IREF
IREF
AGC
MUTE
REC
EQ
REC
EQ
PBEQ
CTL
RECEQ
CTL
36
GND 35
IREF
34 VG
33
10k
32
AGC TC
AGC IN
31 MPX
AGC
30 OUT
D REC IN2
29
REC
MUTE
28 D PB IN2
27
DOLBY NR
REC/PB
26 D L OUT2
25
TC
13 14 15 16 17 18 19 20 21 22 23 24
+
++
+
GND GND
PB
REC
GND GND
PB GND GND
DECK B
R/P HEAD
REC
—2—


Part Number CXA1897Q
Description Dolby B Type Noise Reduction System with Recording/Playback Equalizer
Maker Sony Corporation
Total Page 22 Pages
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