CXA1897Q Datasheet, PDF (1/22 Pages) Sony Corporation – Dolby B Type Noise Reduction System with Recording/Playback Equalizer

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
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 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.
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