00W073A
Sound processor for CD radio cassette player
BD3871FS
7.8±0.3
5.4±0.2
Description
BD3871FS is a sound processor for CD/MD radio
cassette player. This IC provides all functions,
such as input selector (3 input sources), an input
gain amplifier (25dB, 27dB, 29dB),and a surround,
tone (bass, treble). This IC can be controlled
by a 2-wire serial data interface.
Features
Dimension (Units : mm)
10.0±0.2
24
13
1
1.8±0. 1
12
0. 1 1
0.8
0.36±0. 1
0.3Min
0. 15
1) Can select center frequency and Q value of Bass
characteristics by external components.
2) Mute switch at the input terminal can reduce cross talk.
3) Surround function is composed without external components.
4) Ideal for energy-saving designs with low current consumption
due to the adoption of the BiCMOS process, allowing easy-design
of the regulator blocks in the set.
Applications
CD radio cassette player, MD radio cassette player, Micro component stereo
SSOP-A24
Absolute Maximum Ratings (Ta=25˚C)
Parameter
Power supply voltage
Power dissipation
Operating temperature range
Storage temperature range
Symbol
Vcc
Pd
Topr
Tstg
–25
–55
Limits
10
800
~
~
*
Unit
V
mW
+75
+125
˚C
˚C
*
Derating : 8.0mW/˚C for operation above Ta=25˚C
Recommended Operating Conditions (Ta=25˚C)
Parameter
Operating voltage
Symbol
V
DD
Min.
4.5
Typ.
8
Max.
9.5
Unit
V
September, 2000
0.15±0. 1
Electrical characteristics
(Unless otherwise noted ; Ta=25˚C, Vcc=8V, f=1kHz, Vi=50mVrms, RL=10kΩ , Rg=600Ω ,
INPUT GAIN=24dB, Vol=0dB, bass,treble=0dB, surround=OFF)
Parameter
Circuit current
Output voltage gain
Total harmonic distortion
Maximum output voltage
Residual noise voltage
Output residual noise voltage
Volume control range
Bass control range
Treble control range
Surround gain (Antiphase)
Symbol
I
Q
G
V
THD
Vomax
Vno
Vmno
VRI
GB
TB
Vsur
Min.
—
22
—
1.6
—
—
–90
+12
–16
+10
–14
Typ.
8
24
0.01
2.1
4.5
40
–87
+14
–14
+12
–12
Max.
21
26
0.1
—
15
80
–84
+16
–12
+14
–10
Unit
mA
dB
%
Vrms
µVrms
µVrms
dB
dB
dB
dB
No signal
Conditions
V
OUT
=1Vrms, Bw=400~30kHz
THD=1%, Bw=400~30kHz
Rg=0Ω , Vol=–•, Bw=IHF–A
Rg=0Ω , Vol=0dB, Bw=IHF–A
V
IN
=1Vrms, 1dB/STEP
V
IN
=100mVrms, 2dB/STEP
V
IN
=100mVrms, 2dB/STEP
V
IN
=100mVrms
8
10
12
Application Circuit
OUT1 OUT2
0.33 µ
0.0022 µ
0.0022 µ
Vcc
DATA CLOCK
LATCH
0.1µ
5.6K
0.1µ
0.1µ
5.6K
0.1µ
+
18
10µ
+
17
10µ
390K
390K
24
23
22
21
20
19
16
15
14
13
Surround
Treble1
fc=8kHz
Treble2
fc=8kHz
Bass
2
f
0
=80Hz
Bass 1
f
0
=80Hz
Logic
Vcc/2
Vcc/2
0dB
~
–87dB
–•
Vcc/2
Vcc/2
Vcc/2
BD3871FS
50k
50k
50k
50k
50k
50k
1
2
3
+
10µ
+
10µ
4
5
+
10µ
6
+
10µ
7
+
10µ
8
+
10µ
9
+
10 µ
4.7K
10
+
10µ
4.7K
C2
11
+
47µ
12
UNIT
RESISTANCE : Ω
CAPACITOR :
F
A1
A2
B1
B2
C1
Appendix
Notes
No technical content pages of this document may be reproduced in any form or transmitted by any
means without prior permission of ROHM CO.,LTD.
The contents described herein are subject to change without notice. The specifications for the
product described in this document are for reference only. Upon actual use, therefore, please request
that specifications to be separately delivered.
Application circuit diagrams and circuit constants contained herein are shown as examples of standard
use and operation. Please pay careful attention to the peripheral conditions when designing circuits
and deciding upon circuit constants in the set.
Any data, including, but not limited to application circuit diagrams information, described herein
are intended only as illustrations of such devices and not as the specifications for such devices. ROHM
CO.,LTD. disclaims any warranty that any use of such devices shall be free from infringement of any
third party's intellectual property rights or other proprietary rights, and further, assumes no liability of
whatsoever nature in the event of any such infringement, or arising from or connected with or related
to the use of such devices.
Upon the sale of any such devices, other than for buyer's right to use such devices itself, resell or
otherwise dispose of the same, no express or implied right or license to practice or commercially
exploit any intellectual property rights or other proprietary rights owned or controlled by
ROHM CO., LTD. is granted to any such buyer.
Products listed in this document use silicon as a basic material.
Products listed in this document are no antiradiation design.
The products listed in this document are designed to be used with ordinary electronic equipment or devices
(such as audio visual equipment, office-automation equipment, communications devices, electrical
appliances and electronic toys).
Should you intend to use these products with equipment or devices which require an extremely high level of
reliability and the malfunction of with would directly endanger human life (such as medical instruments,
transportation equipment, aerospace machinery, nuclear-reactor controllers, fuel controllers and other
safety devices), please be sure to consult with our sales representative in advance.
About Export Control Order in Japan
Products described herein are the objects of controlled goods in Annex 1 (Item 16) of Export Trade Control
Order in Japan.
In case of export from Japan, please confirm if it applies to "objective" criteria or an "informed" (by MITI clause)
on the basis of "catch all controls for Non-Proliferation of Weapons of Mass Destruction.
Appendix1-Rev1.0
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