Wireless Audio Link IC BH1415F Audio ICs

Wireless Audio Link IC BH1415F  Audio ICs
BH1415F
Audio ICs
Wireless Audio Link IC
BH1415F
The BH1415F is a FM stereo transmitter IC that transmits simple configuration. The IC consists of a stereo modulator for
generating stereo composite signals and a FM transmitter for broadcasting a FM signal on the air. The stereo modulator
generates a composite signal which consists of the MAIN, SUB, and pilot signal from a 38kHz oscillator.
The FM transmitter radiates FM wave on the air by modulating the carrier signal with a composite signal.
!Applications
CD changer, Car TV, Car navigation, Wireless speakers, Personal computer (sound board), Game machine
!Features
1) It is possible to improve the timbre because it has the pre-emphasis circuit, limiter circuit, and the low-pass filter circuit.
2) Built-in pilot-tone system FM stereo modulator circuit.
3) The transmission frequency is stable because it has a PLL system FM transmitter circuit.
4) PLL data input (CE, CK, DA) by serial input.
!Absolute maximum ratings (Ta = 25°C, In measurement circuit.)
Parameter
Supply voltage
Data input voltage
Phase comparator output voltage
Power dissipation
Storage temperature
Symbol
Limits
Unit
VCC
+7.0
V
Pin8,12
VIN-D
−0.3 to VCC+0.3
V
Pin15,16,17,18
VOUT-P
−0.3 to VCC+0.3
V
Pin7
∗
Pd
450
Tstg
−55 to +125
Conditions
mW
°C
∗ Derating : 4.5mW/°C for operation above Ta=25°C.
!Recommended operating conditions (Ta = 25°C)
Symbol
Min.
Typ.
Max.
Unit
Operating supply voltage
VCC
4.0
−
6.0
V
Operating temperature
Topr
−40
−
+85
°C
Audio input level
VIN-A
−
−
−10
dBV
Pin1,22
Audio input frequency band
fIN-A
20
−
15k
Hz
Pin1,22
Pre-emphasis time constant set up range
Parameter
Conditions
Pin8,12
t PRE
−
−
155
µsec
Pin2,21
Transmission frequency
fTX
70
−
120
MHz
Pin9,11
Control terminal "H" level input voltage
VIH
0.8VCC
−
VCC
V
Pin15,16,17,18
Control terminal "L" level input voltage
VIL
GND
−
0.2VCC
V
Pin15,16,17,18
1/3
1
2
3
4
5
6
7
8
9
10
11
R-ch INPUT
PRE-EMPHASIS TIME CONSTANT
LPF TIME CONSTANT
FILTER
COMPOSITE SIGNAL OUTPUT
GND
PLL PHASE DETECTOR OUTPUT
VCC
RF OSCILLATOR
RF GND
RF OUTPUT
PRE-EMPHASIS TIME CONSTANT
LPF TIME CONSTANT
PILOT SIGNAL ADJUST
AUDIO MUTING
DATA
CLOCK
CHIP ENABLE
X'tal OSCILLATOR
X'tal OSCILLATOR
22
21
20
19
18
17
16
15
14
13
Pre-emphasis
and Limiter
+
−
MPX
VCC
2
1
50
+
LPF
1
2
Phase
detector
+
OSC
GND
VCC
PLL VCC
L-ch INPUT
BH1415F
Audio ICs
!Block diagram
PLL VCC
12
−
LPF
Shift register
MUTE
1
4
1
19
Program counter
RF
RF GND
2/3
BH1415F
Audio ICs
No.
Control unit / Data
(2)
Contents
• It changes a stereo and monaural operation.
MULTIPLEXER
MONO
MONO
PD0, PD1
Monaural operation L+R , Pilot OFF
1
Stereo operation
ωs
L+R+(L-R),sinωst+Psin 2 t
Charge pump output
PD0
PD1
0
0
Usual operation
0
1
Compulsion by Low
1
0
Compulsion by High
1
1
High impedance
• It is data for the LSI test.
TEST MODE
(3)
0
• It controls charge pump output by the phase comparator compulsorily.
PHASE DETECTOR
(2)
Condition of the composite signal
• Always in T0 Input "1".
T0, T1
• Always in T1 Input "0".
!External dimensions (Units : mm)
13.6 ± 0.2
5.4 ± 0.2
0.15 ± 0.1
1.8 ± 0.1
12
1
0.11
7.8 ± 0.3
22
11
1.27
0.4 ± 0.1
0.3Min.
0.15
SOP22
3/3
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
Mouser Electronics
Authorized Distributor
Click to View Pricing, Inventory, Delivery & Lifecycle Information:
ROHM Semiconductor:
BH1415F-E2
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