BH1415F Datasheet, PDF (1/4 Pages) Rohm – Wireless Audio Link IC

Audio ICs
Wireless Audio Link IC
BH1415F
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
Symbol
Limits
Unit
Conditions
Supply voltage
VCC
+7.0
V Pin8,12
Data input voltage
VIN-D −0.3 to VCC+0.3
V
Pin15,16,17,18
Phase comparator output voltage VOUT-P −0.3 to VCC+0.3
V
Pin7
Power dissipation
Pd
450^∗
mW
Storage temperature
Tstg
−55 to +125
°C
∗ Derating : 4.5mW/°C for operation above Ta=25°C.
!Recommended operating conditions (Ta = 25°C)
Parameter
Symbol Min. Typ. Max. Unit
Conditions
Operating supply voltage
VCC
4.0
−
6.0
V Pin8,12
Operating temperature
Topr
−40
−
+85
°C
Audio input level
Audio input frequency band
VIN-A
−
−
−10
dBV Pin1,22
fIN-A
20
−
15k
Hz Pin1,22
Pre-emphasis time constant set up range 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
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