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BH1417F
Multimedia ICs
Wireless Audio Link IC
BH1417F
The BH1417F 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. Frequency is set for North America.
!Applications Wireless speakers, Personal computer(sound board), Game machine, CD changer, Car TV, Car navigation
!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 controls data input in parallel (4bits, 14ch for North America).
!Absolute maximum ratings (Ta = 25C, In measurement circuit.)
Parameter Supply voltage Symbol VCC Limits +7.0 -0.3~VCC+0.3 -0.3~VCC+0.3 450
Unit V V V mW Pin8,12
Conditions
Date input voltage Phase comparator output voltage
Power dissipation Storage temperature
VIN-D VOUT-P
Pd Tstg
Pin15,16,17,18 Pin7
-55~+125
C
Derating : 4.5mW/C for operation above Ta=25C.
!Recommended operating conditions (Ta = 25C)
Parameter Operating supply voltage Symbol VCC Min. 4.0 -40 - 20 - 87.7 106.7 0.8VCC GND Typ. - - - - - - - - Max. 6.0 +85 -10 15k 155 88.9 107.9 VCC 0.2VCC Unit V C dBV Hz s MHz V V Pin1,22 Pin1,22 Pin2,21 Pin9,11 Pin15,16,17,18 Pin15,16,17,18
Conditions
Pin8,12
Operating temperature Audio input level Audio input frequency band Pre-emphasis time constant set up range Transmission frequency(200kHz step) Control terminal "H" level input voltage Control terminal "L" level input voltage
Topr
VIN-A
fIN-A PRE fTX VIH VIL
!Block diagram
Multimedia ICs
22
1
R-ch INPUT
21 2
+ - - +
L-ch INPUT PRE-EMPHASIS TIME CONSTANT LPF TIME CONSTANT PILOT SIGNAL ADJUST D3
PRE-EMPHASIS TIME CONSTANT
20 3
LPF LPF
Pre-emphasis and Limiter
LPF TIME CONSTANT
19
VCC 2
4
MPX
FILTER
18 5 + 6 7
1 2 Phase detector VCC GND
COMPOSITE SIGNAL OUTPUT GND PLL PHASE DETECTOR OUTPUT
8
1 19
17 16 15
D2 D1 D0
VCC
9
OSC
1 50
14
RF OSCILLATOR
10
RF
X'tal OSCILLATOR
13
1 4
Program counter
RF GND
RF GND
11
X'tal OSCILLATOR
12
PLL VCC
RF OUTPUT
PLL VCC
BH1417F
BH1417F
Multimedia ICs
!Pin descriptions
Pin No. 1 Pin descriptions R-ch audio source input terminal
8
Equivalent circuit
DC (V)
22
L-ch audio source input terminal It cuts DC with the capacitor and it inputs L-ch audio signal.
1k
43k
It cuts DC with the capacitor and it inputs R-ch audio signal.
1 2 VCC
1 2 VCC
22.7k
1 22 or
2,21
Pre-emphasis time constant terminal It connects a capacitor for the time constant of pre-emphasis. =22.7kxC
6 2 21 or
1 2 VCC
3,20
LPF time constant terminal This is 15kHz LPF. It connects a 150pF capacitor.
8
100k
100k
50p
100k
1 + 2 VCC 6 3 20 or
-
1 2 VCC
4
Filter terminal It is a ripple filter for the reference voltage of the audio part.
8
50k
6 4
5
Composite signal output terminal It connects to the FM modulator.
8
50k
1 2 VCC
5
1 2 VCC
6
6 7
GND PLL phase detector output terminal It connects to the PLL LPF circuit.
8
-
GND
7
-
6
8
Power supply terminal
-
VCC
BH1417F
Multimedia ICs
Pin No. 9 Pin descriptions RF oscillator terminal This is the base terminal of the colpitts oscillator. It connects time constant of the oscillation.
9 30p 8
Equivalent circuit
DC (V)
25k
18p
2p
4 7 VCC
10
40k
10 11
RF GND
RF transmission output terminal It connects to the antenna through BPF.
11 8
-
GND
VCC -1.9
10
12 13,14
PLL power supply terminal X'tal oscillator terminal It connects a 7.6MHz crystal oscillator.
12
-
VCC
4k 14 1M 13
-
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
1 2 VCC
6
BH1417F
Multimedia ICs
!Electrical characteristics (Unless otherwise noted, Ta = 25C, VCC = 5.0V Signal source : fIN = 400Hz)
Parameter Symbol IQ Sep THD C.B Gv MP Min. 14 25 - Typ. 20 40 Max. 28 - Unit mA dB VIN=-20dBV LR,RL 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 VO=-3dB Pin2,21 Open fTX=107.9MHz Conditions Measurement circuit Fig.1 Fig.2 Fig.3 Fig.2 Fig.3 Fig.3 Fig.3 Fig.3 Fig.4 Fig.5 Fig.6 Fig.7 Fig.7 Fig.8 Fig.8 Fig.9 Fig.9
Quiescent current
Channel separation Total harmonic distortion Channel balance Input output gain Pilot modulation rate Sub carrier rejection ratio Pre-emphasis time constant Limiter input level LPF cut off frequency Transmission output level "H" level input current "L" level input current "H" level output voltage "L" level output voltage "off" level leak current1 "off" level leak current2
0.1 0 0 15 -30 50 -13 15 99
- -
0.3 +2 +2 18 -20 60 -10 18 102 1.0
- -
%
dB dB
-2 -2 12
-
%
dB
SCR
PRE
40 -16 12 96
-
s
dBV kHz dBV A A V V nA nA
VIN(LIM) fC(LPF) VTX IIH IIL VOH VOL IOFF1 IOFF2
Pin15,16,17,18 VIN=5V Pin15,16,17,18 VIN=0V Pin7 IOUT=-1.0mA Pin7 IOUT=1.0mA Pin7 VOUT=5V Pin7 VOUT=GND
-1.0 VCC- 1.0
- -
VCC- 0.15 0.15
- -
1.0 100
-
-100
BH1417F
Multimedia ICs
!Measurement circuits Quiescent current
7.6MHz
27p
27p
2200p
150p
D3
D2
D1
22
21
20
19
18
17
16
D0
15
14
13
12
PLL VCC
- +
LPF MPX 1 2 1 50 1 19 1 4
Pre-emphasis and Limiter + - LPF
Phase detector VCC 2
Program counter
OSC RF
+
GND VCC
RF GND
1
2200p
2
3
4
5
6
7
0.01
8
9
10
11
150p
10
100
IQ
A
+5V
Fig.1
0.01
BH1417F
Multimedia ICs
Channel separation Channel balance
7.6MHz
27p
27p
150p
470p
10
2200p
D3
D2
L-ch
22
21
20
19
18
17
D1
16
D0
15
14
13
12
PLL VCC
- +
LPF MPX 1 2 1 50 1 19 1 4
Pre-emphasis and Limiter
fIN = 400Hz VIN = -20dBV
+ - LPF
Phase detector VCC 2
Program counter
OSC RF
+
GND VCC
RF GND
R-ch 10
1
2200p
2
3
4
10
5
6
7
0.01
8
9
10
11
150p
10
10k
100
Stereo signal demodulator
L-ch
+5V
V ~
Sep, C.B
V ~
R-ch
Fig.2
0.01
BH1417F
Multimedia ICs
Total harmonic distortion Input output gain Pilot index of modulation Sub carrier rejection ratio Pre-emphasis time constant
7.6MHz
150p
470p
27p
27p
10 +
2200p
D3
D2
D1
L-ch
22
21
20
19
18
17
16
D0
15
14
13
12
PLL VCC
- +
LPF MPX 1 2 1 50 1 19 1 4
Pre-emphasis and Limiter + fIN=400Hz ~ VIN=-20dBV - LPF
Phase detector VCC 2 R-ch
Program counter
OSC RF
+
GND VCC
RF GND
1
2
3
4
10
5
+
6
7
0.01 +
8
9
10
11
10 +
2200p
150p
10
+ 100
10k
Spectrum analyzer SCR
GV, MP PRE
IHF BPF 200Hz~15kHz
+5V
THD, VO(MUTE)
0 -10 SCR -20 -30 -40 -50 -60
Output response (dB)
0
10k
20k
30k
40k
50k
Frequency (Hz)
Fig.3
0.01
BH1417F
Multimedia ICs
Limiter input level
7.6MHz
150p
470p
27p
27p
10 +
2200p
D3
D2
D1
L-ch
22
21
20
19
18
17
16
D0
15
14
13
12
PLL VCC
- +
LPF MPX 1 2 1 50 1 19 1 4
Pre-emphasis and Limiter +
~ fIN=400Hz
-
LPF
Phase detector VCC 2 R-ch
Program counter
OSC RF
+
GND VCC
RF GND
1
2
3
4
10
5
+
6
7
0.01 +
8
9
10
11
10 +
2200p
150p
10
+ 100
10k
+5V VIN (LIM)
Output level (dBV)
0.01
1dB
Input level (dBV) VIN(LIM)
Fig.4
BH1417F
Multimedia ICs
LPF cut off frequency
7.6MHz
150p
470p
27p
27p
10 +
D3
D2
D1
L-ch
22
21
20
19
18
17
16
D0
15
14
13
12
PLL VCC
- +
LPF MPX 1 2 1 50 1 19 1 4
Pre-emphasis and Limiter + fIN=400Hz ~ VIN=-20dBV - LPF
Phase detector VCC 2 R-ch
Program counter
OSC RF
+
GND VCC
RF GND
1
2
3
4
10
5
+
6
7
0.01 +
8
9
10
11
10 +
150p
10
+ 100
10k
+5V fC (LPF)
Output response (dB)
0.01
3dB
Frequency (Hz) fC(LPF)
Fig.5
BH1417F
Multimedia ICs
Transmission output level
7.6MHz
27p
27p
D3
D2
D1
22
21
20
19
18
17
16
D0
15
14
13
12
PLL VCC
- +
LPF MPX 1 2 1 50 1 19 1 4
Pre-emphasis and Limiter + - LPF
Phase detector VCC 2
Program counter
OSC RF
+
GND VCC
RF GND
1
2
3
+
4
5
6
7
0.01
8
15p
9
10
11
1000p VTX Spectrum analyzer Zin=50 fTX=107.9MHz 10k
10
+
FEM10C-2F6 (SUMIDA)
100
20k
27p
0.047
100
33 +
5.1k
10k
2SD2142K (ROHM)
+5V
Fig.6
1000p
KV-1471E (TOKO)
22p
0.01
BH1417F
Multimedia ICs
"H" level input current "L" level input current
0V, 5V
A
IIH, IIL
7.6MHz
27p
27p
D3
D2
D1
22
21
20
19
18
17
16
D0
15
14
13
12
PLL VCC
- +
LPF MPX 1 2 1 50 1 19 1 4
Pre-emphasis and Limiter + - LPF
Phase detector VCC 2
Program counter
OSC RF
+
GND VCC
RF GND
1
2
3
4
5
6
7
0.01
8
9
10
11
+ 100
+5V
Fig.7
0.01
BH1417F
Multimedia ICs
"H" level output voltage "L" level output voltage
7.6MHz
27p
27p
D3
D2
D1
22
21
20
19
18
17
16
D0
15
14
13
12
PLL VCC
- +
LPF MPX 1 2 1 50 1 19 1 4
Pre-emphasis and Limiter + - LPF
Phase detector VCC 2
Program counter
OSC RF
+
GND VCC
RF GND
1
2
3
4
5
6
7
0.01
8
1000p
9
10
11
+ 100 50
VOH, VOL
V
VOH 1mA VOL 1mA
~
SG fIN=108.0MHz (VOH) fIN=107.8MHz (VOL)
+5V
Fig.8
0.01
BH1417F
Multimedia ICs
"off " level leak input current
7.6MHz
27p
27p
D3
D2
D1
22
21
20
19
18
17
16
D0
15
14
13
12
PLL VCC
- +
LPF MPX 1 2 1 50 1 19 1 4
Pre-emphasis and Limiter + - LPF
Phase detector VCC 2
Program counter
OSC RF
+
GND VCC
RF GND
1
2
3
4
5
6
7
0.01
8
9
10
11
+ 100
IOFF1, IOFF2
A
0V, 5V +5V
Fig.9
0.01
BH1417F
Multimedia ICs
!Application circuit US BAND (88.0MHz89.2MHz)
10 +
0.1
27p 27p
2200p
150p
1
50k
+
22
21
20
19
18
17
16
15
7.6MHz
14
13
12
PLL VCC
L-CH
+ 1
GND
GND 1
50k
+
VCC
RF GND
R-CH
1
1
2
2200p 150p
3
+
4
1
5
+
6
7
0.01
8
1000p
9
10
1000p
11
360
82 82
+ 1
GFWB3 (SOSHIN)
ANT
10
33
GND
33p 20k
FEM10C-2F6 (SUMIDA) 33p
MPX 330p 82p 10 + 10k
10k
KV-1471E (TOKO)
10k
0.047
2.2k
3.3k VT
2200p 2SD2142K (ROHM)
100
100 +
+ 100
GND VCC
Fig.10
3.3k
BH1417F
Multimedia ICs
!Circuit operation Parallel data
Control data D0 (Pin15) D1 (Pin16) D2 (Pin17) D3 (Pin18)
Frequency 87.7MHz 87.9MHz 88.1MHz 88.3MHz 88.5MHz 88.7MHz 88.9MHz PLL stops. Phase comparator terminal supports high impedance. 106.7MHz 106.9MHz 107.1MHz 107.3MHz 107.5MHz 107.7MHz 107.9MHz PLL stops. Phase comparator terminal supports high impedance.
L H L H L H L H L H L H L H L H
L L H H L L H H L L H H L L H H
L L L L H H H H L L L L H H H H
L L L L L L L L H H H H H H H H
!External dimensions (Units : mm)
13.60.2
22 12
7.80.3 5.40.2
1
11
1.80.1
0.150.1 0.1
0.11
1.27
0.40.1
SOP22
0.3Min.

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