CXA1600M/P
8-pin Single-chip AM Radio with Built-in Power Amplifier
Description
The CXA1600M/P is an 8-pin single-chip bipolar IC
for AM radios. This IC includes all functions from
the front-end to the power amplifier.
The CXA1600M/P doesn’t require any external
filter, making external ceramic filter attachment
unnecessary.
Features
•
EIAJ output=100 mW (typ.)
(V
CC
=3 V, R
L
=8
Ω)
•
Built-in electrical volume control.
•
No ceramic filter required.
•
Few peripheral components.
Applications
AM radio
Structure
Bipolar silicon monolithic IC
CXA1600M
8 pin SOP (Plastic)
CXA1600P
8 pin DIP (Plastic)
Absolute Maximum Ratings
(Ta=25 °C)
•
Supply voltage
•
Operating temperature
•
Storage temperature
Operating Conditions
Supply voltage
V
CC
1.8 to 4.5
V
V
CC
Topr
Tstg
7
–20 to +75
–65 to +150
V
°C
°C
Block Diagram
RF IN
8
OL AGC
7
LO OSC
6
V
CC
5
RF AMP
MIXER
OSC
OVERLOAD AGC
BPF
IF AMP
AGC
IF DET
VOL
AF POWER AMP
1
AGC
2
VOL
3
GND
4
SP OUT
Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by
any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the
operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits.
—1—
E92311B8X
CXA1600M/P
Pin Description
No.
Symbol
Voltage
(typ.)
Equivalent Circuit
Description
V
CC
=3 V
V
CC
1
AGC
0.61 V
AGC
1
Connect with a capacitor.
GND
V
CC
2
VOL
0.1 V
VOL
2
Connect to the midpoint of the
volume control.
GND
3
GND
0V
V
CC
Ground
4
SP OUT
1.28 V
4
SP OUT
Audio output.
Connect with a capacitor.
GND
5
V
CC
3V
V
CC
6
LO OSC
Power supply
6
LO OSC
V
CC
Oscillation output.
Connect with an oscillation coil.
GND
—2—
CXA1600M/P
No.
Symbol
Voltage
(typ.)
Equivalent Circuit
Description
V
CC
7
OL AGC
0.62 V
7
OL AGC
Connect with a capacitor.
GND
V
CC
8
RF IN
8
RF IN
3V
RF input.
Connect with the antenna circuit.
GND
Electrical Characteristics
Item
1
2
3
Non-signal
circuit current
EIAJ output
(with 8
Ω
load)
Volume attenuation
No signal
f=1 MHz, f
MOD
=1 kHz, 30 %
Vin=90 dBµV
f=1 MHz, f
MOD
=1 kHz, 30 %
Vin=90 dBµV, Volume=minimum
Short circuit at RF IN with a 1µF
capacitor. Measure the level at SP OUT.
Volume=maximum
f=1.010 MHz, f
MOD
=1 kHz, 30 %
Vin=35 dBµV.
Test conditions
Min.
4.8
80
Typ.
6
100
–70
V
CC
=3 V, Ta=25 °C
Max.
10
Unit
mA
mW
–65
dBm
4
Overall noise level
–25
–15
dBm
5
Selectivity
14
19
dB
—3—
CXA1600M/P
AM I/O Characteristics
S+N
0
0dB=–10dBV
V
CC
=3V
f=1MHz
f
MOD
=1kHz
MOD
=30%
–10
–20
Output level [dB]
–30
8
7
–40
Noise
–50
6
5
4
3
–60
THD
2
1
0
20
30
40
50
60
70
80
90
100
110
120
Bar antenna input level [dBµV/m]
Selectivity Characteristics
0
–10
Output level [dB]
–20
–30
–40
–50
–60
–110 –100 –90
–80
–70 –60
–50 –40
–30
–20
–10
0
10
20
30
Input frequency (f
IN
-f
O
) [kHz]
—4—
THD - Distortion factor [%]
CXA1600M/P
Notes on Applications
Application 1
VARIABLE CAPACITOR:
HQ-025A of Toko Co., Ltd.
or equivalent
Bar ANT
D1, D2: 1S1555
OSC COIL
V
OSC
=400mVp-p
130µH
220µ
160p
160p
f
IN
4.7µ
C2
C3
1500p
D1
GND
8
RF IN
7
OL AGC
6
C7
D2
GND
f
OSC
LO OSC
5
V
CC
RF AMP
MIXER
f
IF
OSC
OVERLOAD AGC
BPF
IF AMP
AGC
IF DET
VOL
AGC
VOL
AF POWER AMP
GND
SP OUT
C6
1
2
3
4
22µ
100k
C1
0.1µ
220µ
C5
8Ω SP
2.2µ
R1
GND
C4
GND
The CXA1600M/P operates on the new system using very low intermediate frequency (approx. 55 kHz).
(Actual IF frequency is determined by internal B.P.F.fo.)
f
IF
=
1
f
OSC
–f
IN
≈
55 kHz
2
Please take care of choice of the coil and variable capacitor as follows. (See next page.)
—5—
3V
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