Datasheet S1A0426C01-A0B0, S1A0426C01-S0B0 Datasheet (Samsung)

AM/FM 1 CHIP RADIO S1A0426C01

INTRODUCTION

The S1A0426C01 is a monolithic integrated circuit designed for
radio-cassette tape recorders, clock radios and headphone
radios.

30−SDIP−400

FUNCTIONS

• AM/FM RF AMP • Local OSC

• AM AGC Control • FM AFC Control

• Audio Power AMP • Tuning Indicator

• DC Volume • AM/FM IF AMP

• FM Quadrature DET • AM DET

FEATURES

• Built-in AM/FM Switching Circuit

• Wide operating supply voltage: VCC = 2V − 8.5V

• Low current consumption (VCC = 3V)
— FM: I
— AM: I

• High Power Audio Amplifier: 0.5W (typ) at VCC = 6V, RL = 8, THD = 10%

= 7.0mA (Typ)

CCQ

= 3.5mA (Typ)

CCQ

28−SOP−375

ORDERING INFORMATION

Device Package Operating Temperature

S1A0426C01-A0B0 30−SDIP−400 −20°C − +70°C
S1A0426C01-S0B0 28−SOP−375 −20°C − +70°C

1

S1A0426C01 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)

GND FM

Disc

VOL FM/AM IF DET/AGC

VOL

NF

AM

OSC

AFC

FM

OSC

ABSOLUTE MAXIMUM RATINGS (Ta = 25°C)

Characteristic Symbol Value Unit

Supply Voltage V
Power Dissipation P
Operating Temperature T
Storage Temperature T

AM F/E
FM F/E

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

AM/FM 1 CHIP RADIO S1A0426C01

ELECTRICAL CHARACTERISTICS

(VCC = 6V, Ta = 25°C, FM; ∆f = 22.5kHz, fm = 1kHz, AM; 30% Mod, unless otherwise specified)

Characteristic Symbol Test Condition Min. Typ. Max. Unit

Quiescent Circuit Current I
F/E Voltage Gain G

CCQ

V1V

VI = 0 − 7.0 14.0 mA
VI(1) = 40dBµ, fc = 100MHz, ∆f = 0 32 39 46 dB

Detect Output Gain VO(1) VI(3) = 90dBµ, fi = 10.7MHz −26 −20 −14 dBm

FM

IF-3 dB Sensitivity V

I (LIM)

Vo(VI3) = 90dBµ, -3dB, fi = 10.7MHz − 24 32 dBµ
Total Harmonic Distortion THD1VI(3) = 90dBµ, fi = 10.7MHz(∆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

AF

Total Harmonic Distortion THD3Po = 50mW, f = 1kHz − 0.3 2.5 %
Output Power P

RL = 8Ω, THD = 10%, f = 1kHz 0.4 0.5 − W

O

3

S1A0426C01 AM/FM 1 CHIP RADIO

CDA 10.7MG 89-A (MURATA)

APPLICATION CIRCUIT

S2

AM

FM

0.01µ

F

2.2kΩ

100pF

C-F

10.7MHz

10µF 4.7µF 10µF

0.022µ

F

T1

15

330Ω

C-F

455MHz

14

19 1618 17

20

11 12

ANT

BPF

10µF

*

µ

0.01

F

L1L2L3L4

2pF

21

(21) (20) (19) (18) (17) (16) (15)

(22)

9 10 13

18pF

8

1kΩ

24 23 22

F

µ

0.47

D1

26 2528 27

S1A0426C01

5 6

1pF

Ω

100k

F

µ

4.7

22pF

6pF

0.1µF 470µF 10µF

F

µ

220

BAT

T

0.1µF

(28) (27) (26) (25) (24) (23)

30 29

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) (12) (13) (14)

Ω

*10.7MHz

150

1 2 3 4 7

Ω

S1

8.2k

VR

50kΩ

4