TIGER ELECTRONIC CO.,LTD
AM/FM 1 CHIP TUNER SYSTEM IC (1.5V USE)
TA7792
G ENERAL DESCRI PTI O N
The
TA
7792 is AM/FM 1 chip tuner system (FM FRONT END+AM/FM IF) ICs,
w h i c h i s d e s i g n e d f o r l o w v o l t a g e o p e r a t i o n ( 1 . 5 V, 3 . 0 V ) . T h o s e a r e e s p e c i a l l y
suitable for stereo headphone radio and radio cassette recorder equipments. These
item can realize the low power dissipation and few external parts.
FEATURES
AM detector coil-less
FM mixer coil-less
Switchover between AM/FM mode is possible with one-make switch.
Operating supply voltage range:
V c c ( o p r ) = 0 . 9 5 ~ 5 V ( Ta = 2 5 ° C )
E x c e l l e n t l o w s u p p l y c u r r e n t ( V c c = 1 . 5 V, Ta = 2 5 ° C )
I c c ( A M ) = 1 . 2 m A ( Ty p . )
I c c ( F M ) = 4 . 0 m A ( Ty p . )
BLOCK DIAGRAM
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CHMC
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PIN CONNECTION
FM MIX
AM/FM
SW
TA7792
D7792
1
2
3
4
5
6
7
8
16
15
14
13
FM RF
GND
FM IF1
AM RF
FM IF2
GND
Vcc
FM DET
FM OSC
AM OSC
AM MIX
AM AGC
AM IF
AF
TA7792
D7792
12
11
10
9
TERMINAL VO LTAGE:
Te r m i n a l v o l t a g e a t n o s i g n a l w i t h t e s t c i r c u i t ( V c c = 1 . 5 V, Ta = 2 5 ° C )
Pin No.
Sym-
Pin Name
bol
FM RF OUT
V1
Vcc1
V2
FM OSC
V3
AM OSC
V4
AM MIX OUT V5
AM AGC
V6
AM IF IN
V7
AF OUT
V8
Ty p .
AM FM
-
1.5
-
1.5
-
1.5
1.5 1.5
1.5 1.5
0.8
-
1.4 1.5
0.6 0.6
Unit
V
V
V
V
V
V
V
V
9
10
11
12
13
14
15
16
Pin No.
Sym-
Pin Name
bol
FM DET
V9
Vcc2
V10
GND2
V 11
FM IF IN
V12
AM RF IN
V13
FM MIX OUT V14
GND1
V15
FM RF IN
V16
Ty p .
Unit
AM FM
1.5 1.5
V
1.5 1.5
V
0
0
V
-
0.7
V
0.7
-
V
-
0.8
V
0
0
V
-
0.7
V
1
2
3
4
5
6
7
8
MAXIMUM RATINGS
( Ta = 2 5 ° C )
Characteristics
S u p p l y Vo l t a g e
Power Dissipation
O p e r a t i n g Te m p e r a t u r e
St o r a g e Te m p e r a t u r e
Symbol
Vcc
P
D
To p r
Ts t g
Rating
5
750(DIP)
350(SOP)
-25~75
-55~150
Unit
V
mW
°C
°C
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CHMC
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ELECTRICAL CHARACTERISTICS
( V c c = 1 . 5 V, Ta = 2 5 ° C )
Characteristics
Supply Current
Output Resistance Pin 8
Sym-
bol
Icc
Ro
Te s t
C i r-
Cuit
1
1
1
1
1
1
1
1
Te s t C o n d i t i o n
F M : Vi n = 0
A M : Vi n = 0
FM:f=1kHz
AM: f=1kHz
Vi n = 3 0 d B µ V E M F
-
-
Min.
-
-
-
-
14
25
-
TA7792
D7792
Ty p . M a x .
4.0
1.2
1.4
8.0
25
40
1.5
40
5.2
1.8
-
-
50
60
-
-
Unit
mA
k
Ω
A M : Vi n = 6 0 d B µ V E M F, f = 1 M H z , f m = 1 K H z , M O D = 3 0 %
Vo l t a g e G a i n
Gv
m Vr m s
m Vr m s
%
dB
V
dBµV
EMF
%
dB
dBµV
EMF
dB
R e c o v e r e d O u t p u t Vo l t a g e V
O D
To t a l H a r m o n i c
THD
Distortion
S i g n a l To N o i s e R a t i o
S/N
O s c i l l a t o r St o p S u p p l y
Vstop
Vo l t a g e
F M : Vi n = 6 0 d B µ V E M F, f = 8 3 M H z ,
I n p u t L i m i t i n g Vo l t a g e
To t a l H a r m o n i c
Distortion
S i g n a l To N o i s e R a t i o
Quiescent Sensitivity
AM Rejection Ratio
O s c i l l a t o r Vo l t a g e
O s c i l l a t o r St o p S u p p l y
Vo l t a g e
Recovered Output
Vo l t a g e
Vi n ( l i m )
THD
S/N
Qs
AMR
Vo s c
Vstop
V
OD
2
1
1
-
-
Vi n < - 2 0 d B µ V
1
-
EMF
fm=1kHz,
Δ
f=
±
22.5kHz
1
1
1
1
-3dB limiting
-
-
S/N=30dB
MOD=30%
F=60MHz
Vi n < - 2 0 d B µ V
EMF
-
-
-
-
-
-
53
-
28
0.85 0.95
10
0.25
62
12
30
90
0.85
45
16
-
-
-
-
1 3 5 m Vr m s
0.95
68
V
m Vr m s
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CHMC
Silicore
TEST CIRCUIT
TA7792
D7792
TA7792
TEST CIRCUIT 1
TA7792
TEST CIRCUIT 2
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CHMC
Silicore
COIL DATA
（
T E S T C I R C U I T
）
C O I L S TA G E
L1 FM RF
L2 FM OSC
T1 AM OSC
T2 AM IFT
T3 FM DET
L
TEST
Co
FREQUENCY
（
µH
）
(pF)
100MHz
100MHz
796kHz
455kHz
10.7MHz
0.053
0.065
288
-
-
-
-
-
180
82
Qo
100
100
11 5
120
11 0
TURN
1-2
-
-
13
-
-
2-3
-
-
73
-
-
1-3
1.75
2.25
-
180
13
4-6
-
-
-
15
-
TA7792
D7792
WIRE
(mm
Φ
)
0.5UEW
0.5UEW
0.08UEW
0.06UEW
0.12UEW
APPLICATION NOTE
<FM SECTION>
RF amplifier (see Fig.1)
T h i s s t a g e i s c o m p o s e d o f t h e e m i t t e r- g r o u n d e d
a n d c a s c a d e c o n n e c t i o n a m p l i f i e r.
The input impedance of pin 16 is about 260
Ω
,
which is determined by D1.
Mixer amplifier (see Fig.2)
The amplified RF signal is transformed into
IF
signal
by
the
mixer
circuit
which
is
c o m p o s e d o f a d i ff e r e n t i a l a m p l i f i e r.
The amplified IF signal is appeared through
the emitter follower circuit at pin 14. The
o u t p u t i m p e d a n c e o f t h e c e r a m i c f i l t e r.
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CHMC
stm32/stm8
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