ICs for FM/AM Tuner
AN7002K, AN7002S
Single Chip ICs for AM Radio
s
Overview
The AN7002K and the AN7002S are the single chip ICs
incorporating AM tuner block to power amp. block for 3V radio
and are suitable for low-end AM radio.
AN7002K
1
2
3
4
5
6
7
8
9
10
11
22
21
20
19
18
17
16
15
14
13
12
Unit : mm
0.5±0.1
0.9±0.25
1.1±0.25
3.45±0.25
4.5±0.25
+ 0.1
5
– 0.0
M
ain
Di
sc te
on na
tin nc
ue e/
d
s
Features
•
Single chip
19.1±0.3
ce
/D
isc
s
Block Diagram
an
24
22
23
21
22
20
Mix.
Ripple Rejection
Local
OSC
Input
Circuit
Drive
Circuit
Pl
1
1
2
2
3
3
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6.35±0.3
ICs incorporating AM tuner block to power
amp. block
•
Low power consumption : 17mA (at no signal)
•
Built-in tuning indicator circuit
•
Adjustment-free IF
0.35
3 ~ 15˚
7.62±0.25
22-Lead Shrunk SDIP Package (SDIP022-P-0300A)
AN7002S
0.45
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
0.4±0.25
1.27
0.1±0.1
di
ue
on
tin
7.2±0.3
9.4±0.3
24-Lead SOP Package (SOP024-P-0375)
17 16
15
21
19
20
18
19
17
18
16
GND 15
14
14
13
13
12
Ma
int
en
AM IF
Det.
AGC
Output
Circuit
Indi-
cator
4
4
5
5
6
GND
6
7
7
8
8
9
9
V
CC
10
10
11
11
12
Pin No. within
is for AN7002S.
0.925
0.15
0.3
2.0±0.2
15.3±0.3
1.778
Unit : mm
AN7002K, AN7002S
s
Absolute Maximum Ratings
(Ta=25˚C)
Parameter
Supply Voltage
Supply Current
Power Dissipation
AN7002K
AN7002S
AN7002K
AN7002S
AN7002K
AN7002S
Symbol
V
CC
I
CC
P
D
T
opr
T
stg
Rating
6
4.5
300
1980
520
–20 ~ + 75
–55 ~ + 150
ICs for FM/AM Tuner
Unit
V
mA
mW
˚C
˚C
Parameter
Symbol
V
CC
Operating Supply Voltage AN7002K
Range
AN7002S
s
Electrical Characteristics
(V
CC
= 3V, [AM Section] R
L
= 5kΩ, f = 1MHz, Mod. = 30%, f
M
= 400Hz [Power Section] R
L
= 8Ω, f = 1kHz, Ta = 25˚C)
Parameter
Symbol
I
tot
Condition
min.
typ.
Total Circuit Current
AM V
in
= –20dBµ, Power V
in
= 0mV
V
in
= 60dBµ
9
17
24
17
44
AM Section (Power Section R
g
=10kΩ)
Detection Output Voltage
Sensitivity
Indicator Sensitivity
V
O
Smax.
V
IND
G
V
Power Section (AM Section V
in
= –20dBµ)
Voltage Gain
Output Noise Voltage
Maximum Output
V
NO
P
O
Total Harmonic Distortion
THD
/D
isc
s
Characteristics Curve
AM
– 40
Output Voltage Vo (dBV)
Total Harmonic Distortion THD (%)
12
10
8
18
14
Pl
– 60
5
4
3
THD
Sensitivity Smax. (dBµ)
3
2
1
0
Smax.
–100
N
V
CC
= 3V
f=1MHz
30% Modulation
Modulated
Wave 400Hz
Ta =25˚C
60
80
100 120
6
4
2
0
Mod.
80%
Mod.30%
2
1
0
–120
0
20
40
0
20
40
60
80
100
120
0
1
2
3
4
5
6
7
8
Input Voltage V
in
(dBµ)
Input Voltage V
in
(dBµ)
Supply Voltage V
CC
(V)
Total Harmonic Distortion THD (%)
S
14
V
CC
= 3V
f= 1MHz
f
in
= 400Hz
Ta= 25˚C
Output Voltage Vo (mA)
– 20
an
Input/Output Characteristics
16
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life
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Range
1.8V ~ 6V
1.8V ~ 4.5V
max.
25
16
–4
7
V
O
= 5mVrms
4.5
13
27
47
5
Pin11 = less than 1VV
V
O
= 0.28mVrms
41
R
g
= 10kΩ, DIN/AUDIO
THD = 10%
0.3
2.5
V
O
= 0.28mVrms
100
120
Distortion Characteristics
Supply Voltage Characteristics
– V
O
, THD, S
max
.
26
22
V
O
V
CC
= 3V
V
in
= 60dBµ
f= 1MHz
Mod. 30%
Ta= 25˚C
M
ain
Di
sc te
on na
tin nc
ue e/
d
Storage Temperature
–55 ~ + 125
Operating Ambient Temperature
s
Recommended Operating Range
(Ta=25˚C)
Unit
mA
32 mVrms
dBµ
dBµ
dB
%
0.6 mVrms
mW
Ma
int
en
ce
on
tin
ue
di
ICs for FM/AM Tuner
s
Application Circuit (AN7002K)
TOKO
CFM455BL
0.022µF
0.022µF
100pF
AN7002K, AN7002S
1µF
0.033µF
+
10kΩ
0.033µF
18
17
16
15
14
13
12
AM IF
Det.
AGC
Output
LED
5
6
7
8
9
10
11
0.022µF
47kΩ
100kΩ
+
3.3Ω
0.033µF
2.2µF
2SA952
V
CC
+
220µF
22µF
22
21
20
+
–
19
Local
OSC
Input
MITSUMI
2018L
R126868
1
2
3
7pF
+
10µF
100Ω
100Ω
0.022µF
s
Pin Descriptions
Pin No.
AN7002K AN7002S
Pin Name
Typ. Waveform
9
10
V
CC
ce
/D
isc
on
tin
1
1
Local OSC
DC 3V
3
3
AF Input
Pl
4
4
Ripple
Rejection
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ct
life
an ut e
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as lat
cy
on es
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sta
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.
Driver
4
+
22µF
2SA952
820Ω
M
ain
Di
sc te
on na
tin nc
ue e/
d
Mix.
Ripple Rejection
Pin No. within
220µF
is for AN7002S
Description
Equivalent Circuit
V
CC
di
AMOSC pin
Oscillation circuit is made
up with differential amp.
ue
1
1
Supply pin
Ma
int
en
an
Differential amp. base input
3
3
10kΩ
13 12
To power amp.
20kΩ
Ripple rejection pin
20kΩ
4
4
AN7002K, AN7002S
s
Pin Descriptions (Cont.)
Pin No.
AN7002K AN7002S
Pin Name
Typ. Waveform
Description
ICs for FM/AM Tuner
Pin No. within
is for AN7002S
Equivalent Circuit
5
5
Phase
Compensation
Phase compensation pin
Connect phase
compensation C, R between
power output pin and this pin.
1.8kΩ
3.3kΩ
M
ain
Di
sc te
on na
tin nc
ue e/
d
6
6
·
7
GND
DC 0V
GND pin
7
8
PNP Power
Base
PNP power transistor base
connection pin
8
9
Power Output
Power output pin
2
2
2
Negative
Feedback
Power amp. negative
feedback pin
10
11
Current
Switching
Current switching pin
Connect this pin with V
CC
and increase supply current
quantity.
5
5
9 10
7 8
8 9
ue
11
12
Indicator
12
13
Ma
int
en
Ripple
Rejection
13
14
Detection
Pl
14
15
Detection
Output
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ct
life
an ut e
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as lat
cy
on es
cle
ic. t in
sta
co fo
ge
.jp rm
.
/en at
/ ion
.
170Ω
20kΩ
2
10 11
1.8kΩ
/D
isc
on
Indicator pin
LED drive becomes open
collector output used AGC
voltage.
Drive capacitance is 2mA.
So LED can’t be driven
directly.
di
11
tin
12
Ripple rejection pin
Make up of
π
type filter at
C, R and increase ripple
rejection efficiency.
Detection pin
Input 455kHz IF signal to
two Tr in reverse phase,
peak detect all-rectified
waveform through
constant-current supply
and C, R charge and
discharge.
ce
Other block
power supply line
100Ω
an
12
9 10
13
200µF
1kΩ
13 14
0.033
µF
Detection output pin
This pin is PNP emitter
ground amp. output.
Output impedance is 2.2kΩ.
14 15
2.2kΩ
ICs for FM/AM Tuner
s
Pin Descriptions (Cont.)
Pin No.
AN7002K AN7002S
16
15
·
17
16
18
Pin Name
GND
Typ. Waveform
DC 0V
GND pin
Description
AN7002K, AN7002S
Pin No. within
is for AN7002S
Equivalent Circuit
IF By-pass
455kHz
IF Signal
IF by-pass capacitor
connection pin
2.7kΩ
17 19
6.8kΩ
16 18
6.8kΩ
19
21
AGC
22
24
RF Input
AM Signal
21
23
MIX Output
455kHz
IF Signal
Ma
int
en
an
ce
/D
isc
on
tin
20
22
NC
Pl
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ea
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se
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co L a d t ty
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ct
life
an ut e
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as lat
cy
on es
cle
ic. t in
sta
co fo
ge
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.
/en at
/ ion
.
AGC pin
Connect capacitor
24
22
RF input pin
Differential amp. base input
19
21
12 13
MIX output pin
Connect ceramic filter
3kΩ
M
ain
Di
sc te
on na
tin nc
ue e/
d
17
19
IF By-pass
455kHz
IF Signal
IF by-pass capacitor
connection pin
18
20
IF Input
455kHz
IF Signal
IF input pin
Differential amp. base input
12
13
18
20
21 23
ue
di
NC Pin
嵌入式系统
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