Page 1
AM/FM 1 CHIP RADIO S1A0426C02
INTROCUCTION
The S1A0426C02 is a monolithic integrated circuit designed for
radio cassette tape recorders, clock radios and headphone
radios.
FUNCTIONS
• AM/FM RF AMP • Local OSC
• AM AGO Control • FM AFO Control
• Audio Power AMP • Tuning Indicator
• DC Volume • AM/FM IF AMP
• FM Quadrature DET • AM DET
• AUDIO MUTE
FEATURES
• Built-in AM/FM Switching Circuit
• Wide operating supply voltage: VCC = 2V − 8.5V
• Low current consumption (VCC = 3V)
30−SDIP−400
28−SOP−375
— FM: I
— AM: I
• High Power Audio Amplifier: 0.5W (typ) at VCC = 6V,
• RL = 8Ω, THD = 10%
= 5.3 mA (Typ)
CCQ
= 3.4 mA (Typ)
CCQ
ORDERING INFORMATION
Device Package Operating Temperature
S1A0426C02-A0B0 30−SDIP−400 −20°C − +70°C
S1A0426C02-S0B0 28−SOP−375 −20°C − +70°C
1
Page 2
S1A0426C02 AM/FM 1 CHIP RADIO
AM
AFC
AFC
TUNING
FM
AM
BAND
DET
BLOCK DIAGRAM
Ripple
OUT
VCC
GND
30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
(28) (27) (26) (25) (24) (23) (22) (21) (20) (19) (19) (17) (16) (15)
Filter
AF IN
OUT
AGC
AGCIFGND
METER
N.C
IF IN
IF IN
SELECT
PWR
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
NOTE:
( ) 28-SOP Package
(1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) (12) (13) (14)
MUTE FM
Disc
VOL FM/AM IF DET/AGC
NF
VOL
AM
OSC
AFC
AM F/E
FM F/E
FM
OSC
ABSOLUTE MAXIMUM RATINGS (Ta = 25°C)
Characteristic Symbol Value Unit
Supply Voltage V
Power Dissipation P
Operating Temperature T
Storage Temperature T
REG
OUTFMRF
CC
D
OPR
STG
Tuning
Meter
AMRFINN.C FM RFINRF
GND
9 V
1000 mW
−20 − +70 °C
−40 − +125 °C
FM/AM
IF OUT
2
Page 3
AM/FM 1 CHIP RADIO S1A0426C02
ELECTRICAL CHARACTERISTICS
(VCC = 6 V, Ta = 25 °C, FM; ∆f = 22.5 kHz, fm = 1 kHz, AM; 30% Mod, unless otherwise specified)
Characteristic Symbol Test Conditions Min. Typ. Max. Unit
Quiescent Circuit Current I
(1) VI = 0 − 7.0 14.0 mA
CCQ
F/E Voltage Gain GV(1) VI(1) = 40dBµ, fc = 100MHz, ∆f = 0 32 39 46 dBµ
Detect Output Gain VO(1) VI(3) = 90dBµ, fi = 10.7MHz −26 −20 −14 dBm
FM
IF-3 dB Sensitivity V
I (LIM)
Total Harmonic Distortion THD
Vo(VI3) = 90dBµ, −3dB, fi = 10.7MHz − 24 32 dB
VI(3) = 90dBµ, fi = 10.7MHz
1
(∆f = 75kHz)
− 0.3 2.0 %
Meter Drive Current IM (1) VI(3) = 60dBµ , fi = 10.7MHz 1.8 3.5 7.0 mA
Quiescent Circuit Current I
(2) VI = 0 − 3.5 10.0 mA
CCQ
F/E Voltage Gain GV(2) VI(2) = 60dBµ, fc = 1660kHz, m = 0% 15 22 29 dB
IF Voltage Gain GV(3) Vo(3) = −34dBm, fi = 455kHz 14 20 27 dBµ
AM
AM Detect Output Voltage VO(2) VI(3) = 85dBµ, fi = 455kHz −26 −20 −14 dBm
Total Harmonic Distortion THD2VI(2) = 95dBµ, fc = 1660kHz, Vcc = 7.8V − 0.6 2.0 %
Meter Drive Current IM(2) VI(3) = 85dBµ, fi = 455kHz 1.3 3.0 7.0 mA
Closed Loop Voltage Gain GV(4) Vo(4) = 0dBm, f = 1kHz 27 31.5 36 dB
Total Harmonic Distortion THD3Po = 50mW, f = 1kHz − 0.3 2.5 %
AF
Output Power P
Mute Level M
RL = 8Ω, THD = 10%, f = 1kHz 0.4 0.5 − W
O
Po = mW, Vi(4) = 30dBm
L
1kHz, V1(3) = FF
8 15 22 dB
3
Page 4
S1A0426C02 AM/FM 1 CHIP RADIO
CDA 10.7MG 89-A (MURATA)
NOTE: ( ) 28-SOP Package
APPLICATION CIRCUIT
AM
FM
S2
0.01µ
F
2.2kΩ
100pF
10.7MHz
C-F
T1
15
330Ω
455kHz
C-F
14
ANT
BPF
10µF
0.01µF
19 1618 17
20
11 12
2pF
*
L1L2L3L4
21
9 10 13
10µF 4.7µF 10µF
0.022µ
F
1kΩ
24 23 22
0.47µF
D1
26 2528 27
8
S1A0426C02
5 6
100kΩ 1pF
4.7µF
18pF
22pF
6pF
0.1µF 470µF 10µF
220µF
BAT
T
0.1µF
(28) (27) (26) (25) (24) (23) (22) (21) (20) (19) (18) (17) (16) (15)
30 29
(1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) (12) (13) (14)
*10.7MHz
150Ω
1 2 3 4 7
0.1µF
R
S1
8.2kΩ
V
50kΩ
4
Loading...