bh1416f
BH1416F
Audio ICs
Wireless Audio Link IC
BH1416F
The BH1416F 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.
zApplications
Wireless speakers, Personal computer(sound board), Game machine, CD changer, Car TV, Car navigation
zFeatures
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 controls data input in parallel (4bits, 14ch).
zAbsolute maximum ratings (Ta = 25°C, In measurement circuit.)
Parameter
Symbol
Limits
Unit
Conditions
Supply voltage
VCC
+7.0
V
Pin8,12
Date input voltage
VIN-D
−0.3~VCC+0.3
V
Pin15,16,17,18
VOUT-P
−0.3~VCC+0.3
V
Pin7
Pd
450
Tstg
−55~+125
Phase comparator output voltage
Power dissipation
Storage temperature
∗
mW
°C
∗ Derating : 4.5mW/°C for operation above Ta=25°C.
zRecommended 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
t PRE
−
µsec
Pin2,21
MHz
Pin9,11
−
155
78.0
89.2
VCC
V
Pin15,16,17,18
−
0.2VCC
V
Pin15,16,17,18
Parameter
Transmission frequency(200kHz step)
fTX
Control terminal "H" level input voltage
VIH
−
76.8
88.0
0.8VCC
Control terminal "L" level input voltage
VIL
GND
−
Conditions
Pin8,12
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
D3
D2
D1
D0
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
BH1416F
Audio ICs
zBlock diagram
PLL VCC
12
−
LPF
1
4
1
19
Program counter
RF
RF GND
BH1416F
Audio ICs
zPin descriptions
Pin No.
1
R−ch audio source input terminal
8
1
2 VCC
1
2 VCC
43k
It cuts DC with the capacitor and it inputs R-ch
audio signal.
22
L−ch audio source input terminal
22.7k
1k
1 22
or
It cuts DC with the capacitor and it inputs L-ch
audio signal.
2,21
Pre-emphasis time constant terminal
6
This is 15kHz LPF.
It connects a 150pF capacitor.
100k
50p
8
100k
LPF time constant terminal
1
2 VCC
2 21
or
It connects a capacitor for the time constant of
pre-emphasis.
τ=22.7kΩ×C
3,20
DC
(V)
Equivalent circuit
Pin descriptions
100k
−
1
+
2 VCC
1
2 VCC
6
3 20
or
Filter terminal
8
50k
4
It is a ripple filter for the reference voltage of the
audio part.
50k
1
2 VCC
6
4
5
Composite signal output terminal
It connects to the FM modulator.
8
1
2 VCC
5
6
6
GND
7
PLL phase detector output terminal
It connects to the PLL LPF circuit.
−
GND
8
−
7
6
8
Power supply terminal
−
VCC
BH1416F
Audio ICs
RF oscillator terminal
8
25k
9
DC
(V)
Equivalent circuit
Pin descriptions
This is the base terminal of the colpitts oscillator.
It connects time constant of the oscillation.
18p
Pin No.
4
7 VCC
2p
9
40k
30p
10
10
RF GND
11
RF transmission output terminal
−
GND
8
It connects to the antenna through BPF.
VCC
−1.9
11
10
12
13,14
−
PLL power supply terminal
X'tal oscillator terminal
VCC
12
It connects a 7.6MHz crystal oscillator.
4k
14
13
−
1M
6
15
Parallel data set up terminal D0
16
Parallel data set up terminal D1
12
17
Parallel data set up terminal D2
−
15 16 17 18
or or or
6
18
Parallel data set up terminal D3
19
Pilot signal adjust terminal
8
5k
19
6
1
2 VCC
BH1416F
Audio ICs
zElectrical characteristics (Unless otherwise noted, Ta = 25°C, VCC = 5.0V Signal source : fIN = 400Hz)
Parameter
Quiescent current
Symbol
Min.
Typ.
Max.
Unit
IQ
14
20
28
mA
Channel separation
Sep
25
40
−
dB
Total harmonic distortion
THD
−
0.1
0.3
%
Channel balance
C.B
−2
0
+2
dB
Input output gain
Gv
−2
0
+2
dB
Pilot modulation rate
MP
12
15
18
%
Sub carrier rejection ratio
SCR
−
−30
−20
dB
Pre-emphasis time constant
τ PRE
40
50
60
µsec
VIN(LIM)
−16
−13
−10
dBV
Limiter input level
Conditions
Measurement
circuit
Fig.1
VIN=−20dBV
L→R,R→L
VIN=−20dBV
L+R
VIN=−20dBV
L+R
VIN=−20dBV
L+R
VIN=−20dBV,L+R
Pin5
VIN=−20dBV
L+R
VIN=−20dBV
L+R
Output level at 1dB gain compression
Fig.2
Fig.3
Fig.2
Fig.3
Fig.3
Fig.3
Fig.3
Fig.4
VO=−3dB
Pin2,21 Open
Fig.5
fTX=89.2MHz
Fig.6
fC(LPF)
12
15
18
kHz
Transmission output level
VTX
98
101
104
dBµV
"H" level input current
IIH
−
−
1.0
µA
Pin15,16,17,18 VIN=5V
Fig.7
LPF cut off frequency
IIL
−1.0
−
−
µA
Pin15,16,17,18 VIN=0V
Fig.7
"H" level output voltage
VOH
VCC−
1.0
VCC−
0.15
−
V
Pin7 IOUT=−1.0mA
Fig.8
"L" level output voltage
VOL
−
0.15
1.0
V
Pin7 IOUT=1.0mA
Fig.8
"off" level leak current1
IOFF1
−
−
100
nA
Pin7 VOUT=5V
Fig.9
"off" level leak current2
IOFF2
−100
−
−
nA
Pin7 VOUT=GND
Fig.9
"L" level input current
BH1416F
Audio ICs
zMeasurement circuits
Quiescent current
22
21
20
19
18
17
0.01µ
27p
D0
D1
D2
D2
150p
2200p
27p
7.6MHz
16
15
14
13
12
PLL VCC
−
LPF
+
Pre-emphasis
and Limiter
1
50
MPX
LPF
−
1
19
1
2
+
Program counter
Phase
detector
VCC
2
+
OSC
VCC
GND
1
2
3
4
5
6
7
10µ
150p
0.01µ
2200p
1
4
100µ
IQ
A
+5V
Fig.1
8
RF
RF GND
9
10
11
BH1416F
Audio ICs
Channel separation
Channel balance
22
21
20
19
18
17
D1
D2
D3
L-ch
0.01µ
27p
D0
470p
10µ
150p
2200p
27p
7.6MHz
16
15
14
13
12
PLL VCC
−
LPF
+
Pre-emphasis
and Limiter
1
50
MPX
LPF
−
1
19
1
2
+
fIN = 400Hz
VIN = -20dBV
Program counter
Phase
detector
+
VCC
2
OSC
VCC
GND
4
5
6
7
10k
L-ch
9
100µ
Stereo signal demodulator
V
~
V
~
Sep, C.B
Fig.2
R-ch
RF
RF GND
8
0.01µ
10µ
3
10µ
2
150p
10µ
1
2200p
R-ch
1
4
+5V
10
11
BH1416F
Audio ICs
Total harmonic distortion
Input output gain
Pilot index of modulation
Sub carrier rejection ratio
Pre-emphasis time constant
22
L-ch
21
20
19
18
17
D0
D1
D2
D3
0.01µ
27p
27p
470p
10µ
+
150p
2200p
7.6MHz
16
15
14
13
12
PLL VCC
−
LPF
+
Pre-emphasis
and Limiter
1
50
MPX
LPF
−
IN
1
19
1
2
+
~ Vf =400Hz
=−20dBV
IN
Program counter
Phase
detector
+
VCC
2
OSC
VCC
GND
1
2
3
4
5
10µ
R-ch
10µ
+
6
7
9
0.01µ
+
100µ
10k
10µ
150p
+
SCR
IHF BPF
200Hz~15kHz
G V , MP
τ PRE
THD, VO(MUTE)
Output response (dB)
0
-10
SCR
-20
-30
-40
-50
-60
0
10k
20k
30k
40k
50k
Frequency (Hz)
Fig.3
RF
RF GND
8
+
2200p
Spectrum
analyzer
1
4
+5V
10
11
BH1416F
Audio ICs
Limiter input level
L-ch
22
21
20
19
18
17
D0
D1
D2
D3
0.01µ
27p
27p
470p
10µ
+
150p
2200p
7.6MHz
16
15
14
13
12
PLL VCC
−
LPF
+
Pre-emphasis
and Limiter
1
50
MPX
LPF
−
IN
1
19
1
2
+
~ f =400Hz
Program counter
Phase
detector
+
VCC
2
OSC
VCC
GND
2
3
4
5
10µ
1
7
RF GND
8
9
10
11
0.01µ
+
+
100µ
+5V
VIN (LIM0)
Output level (dBV)
10µ
+
150p
2200p
10µ
+
6
RF
10k
R-ch
1
4
1dB
Input level (dBV)
VIN(LIM)
Fig.4
BH1416F
Audio ICs
LPF cut off frequency
L-ch
22
21
20
19
18
17
D0
D1
D2
D3
0.01µ
27p
27p
150p
10µ
+
470p
7.6MHz
16
15
14
13
12
PLL VCC
−
LPF
+
Pre-emphasis
and Limiter
1
50
MPX
LPF
−
IN
1
19
1
2
+
~ Vf =400Hz
=−20dBV
IN
Program counter
Phase
detector
+
VCC
2
OSC
VCC
GND
2
3
4
5
10µ
10µ
+
6
7
RF GND
8
9
10
11
0.01µ
+
10µ
150p
+
+
100µ
+5V
fC (LPF)
Output response (dB)
1
RF
10k
R-ch
1
4
3dB
Frequency (Hz)
fC(LPF)
Fig.5
BH1416F
Audio ICs
Transmission output level
22
21
20
19
18
17
D0
D1
D2
D3
0.01µ
27p
27p
7.6MHz
16
15
14
13
12
PLL VCC
−
LPF
1
50
MPX
LPF
Program counter
Phase
detector
VCC
2
+
OSC
VCC
GND
3
4
5
6
7
RF GND
8
9
10
11
0.01µ
1000p
10p
+
33p
KV-1471E
(TOKO)
0.047µ
100
+5V
Fig.6
33µ
+
VTX
Spectrum
analyzer
Zin=50Ω
fTX=89.2MHz
10k
5.1k
FEM10C-3F6
(SUMIDA)
+
100µ
20k
2
10µ
1
RF
10k
2SC2062S
(ROHM)
−
1
19
1
2
+
1
4
1000p
Pre-emphasis
and Limiter
22p
+
BH1416F
Audio ICs
“H” level input current
“L” level input current
A
0V, 5V
IIH, IIL
22
21
20
19
18
17
D0
D1
D2
D3
0.01µ
27p
27p
7.6MHz
16
15
14
13
12
PLL VCC
−
LPF
+
Pre-emphasis
and Limiter
1
50
MPX
LPF
−
1
19
1
2
+
Program counter
Phase
detector
VCC
2
+
OSC
VCC
GND
1
2
3
4
1
4
5
6
7
RF GND
8
9
0.01µ
+
100µ
+5V
Fig.7
RF
10
11
BH1416F
Audio ICs
“H” level output voltage
“L” level output voltage
22
21
20
19
18
17
D0
D1
D2
D3
0.01µ
27p
27p
7.6MHz
16
15
14
13
12
PLL VCC
−
LPF
+
Pre-emphasis
and Limiter
1
50
MPX
LPF
−
1
19
1
2
+
1
4
Program counter
Phase
detector
+
OSC
VCC
GND
1
2
3
4
5
6
7
RF GND
8
0.01µ
RF
9
10
11
1000p
VCC
2
+
50
100µ
VOH, VOL
~
V
VOH
1mA
VOL
1mA
+5V
Fig.8
SG
fIN=89.3MHz (VOH)
fIN=89.1MHz (VOL)
BH1416F
Audio ICs
“off ” level leak input current
22
21
20
19
18
17
D0
D1
D2
D3
0.01µ
27p
27p
7.6MHz
16
15
14
13
12
PLL VCC
−
LPF
+
Pre-emphasis
and Limiter
1
50
MPX
LPF
−
1
19
1
2
+
Program counter
Phase
detector
VCC
2
+
OSC
VCC
GND
1
2
3
4
1
4
5
6
7
RF GND
8
9
0.01µ
+
100µ
IOFF1, IOFF2
A
0V, 5V
+5V
Fig.9
RF
10
11
BH1416F
Audio ICs
zCircuit operation
Parallel data
Control data
D0 (Pin15) D1 (Pin16) D2 (Pin17) D3 (Pin18)
L
L
L
L
76.8MHz
H
L
L
L
77.0MHz
L
H
L
L
77.2MHz
H
H
L
L
77.4MHz
L
L
H
L
77.6MHz
H
L
H
L
77.8MHz
L
H
H
L
78.0MHz
H
H
H
L
PLL stops. Phase comparator terminal supports high impedance.
L
L
L
H
88.0MHz
H
L
L
H
88.2MHz
L
H
L
H
88.4MHz
H
H
L
H
88.6MHz
L
L
H
H
88.8MHz
H
L
H
H
89.0MHz
L
H
H
H
89.2MHz
H
H
H
H
PLL stops. Phase comparator terminal supports high impedance.
zExternal dimensions (Units : mm)
13.6 ± 0.2
5.4 ± 0.2
12
1
0.15 ± 0.1
1.8 ± 0.1
7.8 ± 0.3
22
0.11
Frequency
11
1.27
0.4 ± 0.1
0.3Min.
0.15
SOP22
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertisement