Datasheet S1A0427B01-D0B0 Datasheet (Samsung)

AM/FM 1 CHIP RADIO S1A0427B01

INTRODUCTION

The S1A0427B01 is a monolithic integrated circuit designed for
portable AM/FM radios or AM/FM clock radios.

16−DlP−300A

FUNCTIONS

• AM RF & MIX • AM Local OSC

• AM AGC • AM/FM IF AMP

• AM/FM DET • Audio Power AMP

• Regulator • FM AFC Control

FEATURE

• Portable AM/FM 1-chip radio

• Wide operating supply voltage range: VCC = 3V − 12V (Approximately )
(Depending on the internal regulator tolerance)

• Recommended operating suply voltage:
VCC = 4.5V − 9V

Vcc

R

L

8Ω O O O X X

4.5V 6.0V 7.5V 9.0V Line Operated

16Ω O O O O X
45Ω O O O O O

• When using the AC line as an internal shunt regulator mode, it is possible to use a low cost application without
a transformer (approximately 42mA)

• IF AMP gain is determined by the DC voltage appearing at IC Pin 16.

• Power output: PC = 0.28W (Min.) at THD = 10% (Vcc = 5.5V/8Ω).

ORDERING INFORMATION

Device Package Operating Temperature

S1A0427B01-D0B0 16−DlP−300A 20°C − +70°C

1

S1A0427B01 AM/FM 1 CHIP RADIO

BLOCK DIAGRAM

AM IF

OUTPUTRFGND

4 3 2 1

AM F/E

MIX

RFOSC

5 6

AM OSC AM RF

INPUTRFBYPASS

AM/FM

IF INPUTIFBYPASS

7 8 9 10 11 12

AUDIO

DET OUT

ABSOLUTE MAXIMUM RATINGS (Ta = 25°C)

Character istic Symbol Value Unit

AM/FM
IF

AFC AGC

BYPASS

16 15 14 13

AUDIO

POWER

AM/FM

IF OUTPUT

POWER
AMP

RIPPLE

REJECTION

IF DET

INPUT

AM/FM

DET

AUDIO

GND

V

CC

VOLTAGE

REGULATOR

AUDIO

POWER OUT

Supply Voltage V
Power Dissipation P
Supply Current I
Thermal Resistance Junction to Ambient R
Operating Temperature T
Storage Temperature T

CC

D

CC

100 °C/W

EJA

−20 − +70 °C

OPR
STG

13 V

600 mW

44 mA

−55 − +150 °C

2

AM/FM 1 CHIP RADIO S1A0427B01

ELECTRICAL CHARACTERISTICS

(Ta =25°C, VCC = 5.5V, fm = 1kHz, AM: f = 1MHz, 30% Mod, FM: f = 10.7MHz
∆f = 22.5kHz, unless otherwise specified)

Characteristic Symbol Test Conditions Min. Typ. Max. Unit

FM

AM

PWR

AMP

Quiescent Circuit
Current

Pin 16 Terminal Voltage V

-3 dB Limiting Sensitivity V

Internal Regulated Vtg. V
Pin 16 Voltage V

Maximum Sensitivity S

I

CCQ

16(FM)

I(LIM)

CC

16 (AM)

MAX

Signal to Noise Ratio S/N

Output Power P

Total Harmonic
Distortion

O

THD

Voltage gain G

SW: FM, Vcc = 3V 7 12 17
SW: FM, Vcc = 9V 10 17 23
SW: FM, Vcc = 9V, VI = 0 2.0 2.4 3.1 V
SW: FM, −3dB

V16 = 2.4V, VR Min

− 57 − dB

SW: AM, ICC = 42mA 12 13.2 14.0 V
SW: AM, VCC = 9V, VI = 0 1.4 − 1.9 V
SW: AM, VCC = 12V

VI = 37dBµ, RL = 8Ω
VI = 37.5dBµ, RL = 8Ω

PO = 50mW
f = 1kHz, THD = 10%

VR Min, RL = 8Ω
ICC = 42mA, RL = 45Ω

f = 1kHz, VO = 2V VR Min
f = 1kHz, RL = 8Ω, PO = 50mW − 41 − dB

V

1.5 3.0 − V

15 20 − dB

0.28 − − W

− 0.5 4.0 %

mA

3

S1A0427B01 AM/FM 1 CHIP RADIO

TEST CIRCUIT

V16

VCC

POWER

OUTPUT

RL

GND

1.2k

T6

6

4.7k

C15
10pF

1
2

4

3

4

3

R8

2

Ω

6

1

T5

14 1316 15

S1A0427B01

C13

470µF

12 11 10

C12

220µF

0.001µF

9

C11

22k

R6

Ω

C11

470µF

C18

C16

0.047µF

4

6

470pF

T4

3
2
1

C17

470µF

R8

Ω

SWFM

AM

1 2 3 4 7

T2
1
2

R2

3

10k

Ω

2pF

R1

50

Ω

FM IF INPUT AM RF INPUT

C3

220pF

C2

0.022µF

T3

4

6

6

4

1
2
3

C4

0.022µF

C5

680pF

C6

51pF

1
2
3

5 6

L1

6

4

FM

SW

AM

463

R3

50

Ω

C7

0.047µF

8

L2

2
1

50pF

C10

0.022µF

C8

VR

100k

Ω

0.01µF

R5

8

(R = )

R4

50

Ω

C19

3.3µF

AUDIO

DET OUTPUT

AUDIO

POWER INPUT

4

AM/FM 1 CHIP RADIO S1A0427B01

APPLICATION INFORMATION

— EXTERNAL COMPONENTS

Part

Number

R5 Am gain Control

R7

R8 FM gain adjust 470Ω Low FM gain

C2 IF bypass 0.022µF Should not be less than 0.005µF
C4 IF filter 0.022µF Removal may cause IF oscillation No influence

C7 AM bypass 0.047µF Low gain

C9 Detector filter 0.01µF Unstable IF AMP oscillation

C10 Audio coupling 0.022µF

C11

Purpose Typical

FM detector
damper

Audio Input High­cut

Smaller Than Typ Greater Than Typ

47kΩ

(33K − ∞ )

4.7kΩ

0.001µF Audio oscillation Poor response

Low AM gain
Low detector output, stable IF gain,

low FM gain

Lower sensitivity, poor low frequency
response

Influence

AGC Distortion increase,
High gain

Sharp IF AMP curve
High gain, but noise

increase
High IF Gain,

S/N ratio degrade

Using over 1 will cause
FM distortion at small
signal

Poor FM frequency
response

Bass boost affects
de-emphasis curve

C12 Ripple filter 220µF Poor frequency response & Low gain Improve AC Hum
C13
C14 Power line filter 470µF Poor AC Hum Improve AC Hum
C15

C16

C17

Audio output
coupling

FM detector
phase-shift

High freq.
(IF) bypass

AN AGC time
constant and high
frequency (IF)
bypass

470µF Poor low frequency response

10pF Narrow IF bandwidth Wide IF bandwidth

0.047µF Removal will cause fm oscillation No influence

0.047µF Charging not recommended −

Can achieve optimum
output power

5

S1A0427B01 AM/FM 1 CHIP RADIO

FUNCTION DESCRIPTION (PIN 16 DC VOLTAGE)

1. IF Gain Grouping Table

(1) Test Condition: VCC = 9V (Pin 13).

Pin 8 resistance (AM) = 47kΩ
Pin 16 resistance (FM) = 1.2kΩ

(2) Grouping Table

V16(AM)

V16(FM)

2.4 − 2.85V 2B

2. IF gain is determined by DC voltage appeared at IC Pin 16.

The DC voltage at Pin 16 to the following values:

AM = 1.4 − 1.65V (DC)

FM = 1.9 − 2.10V (DC)
AM gain can be adjusted by the loading resistor value of Pin 8 (AM) from 33kΩ to infinity.
FM gain can be adjusted by the loading resistor value of Pin 16 (FM) from 3kΩ to 680.
Recommended resistance (Pin 8, Pin 16).

Pin 8 (AM) = 47kΩ

Pin 16 (FM) = 470kΩ

1.4 - 1.7 V

6

AM/FM 1 CHIP RADIO S1A0427B01

APPLICATION CIRCUIT

V

220pF

4

3
2

4.7k

6

1

T4

Ω

10pF

T6

6

1
2

4

3

4

3
2

6

1

T5

220µF

0.1µF

2.2

SP

100µF 100µF

Ω

CC

ANT

1674-0

L4

820pF

220Ω

KSC

* C

1.5pF

GND

20pF

5.1pF

L3

*
(180kΩ)

* (56kΩ)

2.2µF

1000pF

1.8pF

20pF

15pF

0.047µF

3
2
1

680

AM
FM SW1B

3.3k

Ω

Ω

2pF

T1

L5

4

6

1000pF

330µF

14 1316 15

S1A0427B01

1 2 3 4 7

T2 T3

6

1k

Ω

1000pF

1
2

4

3

680

220pF

3
2
1

Ω

0.047µF

NOTES : 1. SW1 : AM Position.

2. * Marking : Value of C and R have to be selected for good conditions

12 11 10

5 6

4

6

FM

0.022µF

AM

SW1A

100µF

0.002µF

22k

9

8

AM BAR ANT

L2

0.047µF

Ω

GND

50k

V

R

0.022µF

0.01µF

*R

Ω

AM OSC

4

6

8.2pF

3
2
1

L1

7

S1A0427B01 AM/FM 1 CHIP RADIO

COIL SPECIFICATION 1

Coil No. f Q

O

Turns C

T1 10.7MHz 120 1-3 8T 150 pF

1-3 11T

T2 10.7MHz 70 min

75 ± 5 pF

4-6 2T
1-2 91T

T3

(T6)

455kHz 80 min

180 ± 5 pF2-3 55T

4-6 6T

T4 10.7MHz 45 min 1-3 11T 82 ± 3 pF

1-3 7T

T5 10.7MHz 25 min

180 pF

4-6 7T
1-3 86T

L1

AM Local
Oscillator

90 min

4-6 7T

O

Connections (KOREA TOKO)

3
2
1

3
2

1

3
2

1

3
2
1

3
2

1

3
2

1

4

6

4

6

4

6

4

6

4

6

4

6

L2 AM ANT 200

L3 FM ANT

L4 Trap

L5

FM

Oscillator

1-2

(L = 560µH )

3-4 9T

0.8mmφ
UEW

TAP

0.32mmφ
UEW

0.8mmφ
UEW

138T

5T

0.5T

10T

4T −

core: 10 mm φ X 55 mm

1 2 3

V.C

7 mm

7 mm

7 mm

GND Pin 6 GND

5 mm

5 mm

5 mm

4

8

AM/FM 1 CHIP RADIO S1A0427B01

Coil No. f Q

0

Turns C.L. Connections (KWANG SUNG PART NO)

T1 10.7MHz 120 1-3 8T 150pF

1-3 11T

T2 10.7MHz 70min

4-6 2T

1-2 91T

T3

(T6)

455kHz 80min

2-3 55T

4-6 6T

T4 10.7MHz 45min 1-3 11T 82pF

75pF

180pF

3

2
1

KSI-FD5

3
2

1

KSI-FA2

3
2

1

KSI-AA4

3
2

1

4

6

4

6

4

6

T5 10.7MHz 45min

AM

L1

Local

90min

Oscillator

L2

AM

ANT

200

1-3 7T

4-6 7T

1-3 86T

4-6 7T

1-2

L = 560uH

4-6 9T

138T

180pF

KSI-FD4

3
2

1

KSI-FA4

3
2

1

KSI-AO4

core: 10 mm X 55 mm

1 2 3

V.C

GND Pin 6 GND

KSA-ANT560

4

6

4

6

4

9

S1A0427B01 AM/FM 1 CHIP RADIO

Coil No. f Q

L3

FM

ANT

L4 Trap

L5

FM

Oscillator

0

Turns C.L. Connections (KWANG SUNG PART NO)

5T

0.8mm¢
UEW

0.5T

7 mm

5 mm

KSS-SP5

0.32mm¢
UEW

10T

7 mm

5 mm

KSS-SP4

0.8mm¢
UEW

4T

7 mm

5 mm

KSS-SP3

10

AM/FM 1 CHIP RADIO S1A0427B01

ANT

APPLICATION CIRCUIT 2

VR

50kΩ

22kΩ

470µF

VCC

0.001µF

SP

220µF

9

100µF

12 11 10

47kΩ

0.01µF

0.02µF

0.04µF

8

L5 (AM BAR ANT)

140pF

5 6

AM FM

L6

0.04µF

S1A0427B01

0.04µF

T6

T5T4

4.7kΩ

T5

4.7kΩ

10pF

2.2kΩ

14 1316 15

1 2 3 4 7

220µF0.02µF

T3

T2

2pF

T1

1kΩ

680Ω

L4

1kΩ

0.01µF

0.01µF

2.2kΩ

1N60

AM

FM

470Ω

100Ω

KSC

1674-0

5pF

L3

5pF

L2

22Ω

KSC

1674-0

47pF

47pF

L1

300pF

470Ω
40pF
20pF

0.01µF

0.005µF

330Ω

30pF

0.005µF

100kΩ

0.02µF 100µF

2.2kΩ

F

100kΩ

µ

0.02

11

S1A0427B01 AM/FM 1 CHIP RADIO

COIL SPECIFICATION 2

Coil No. f Q

0

Turns C.L. Connections

1-3 11

T1 10.7MHz 90

4-6 3

1-3

5

T2 10.7MHz 60

4-6 2
1-2 127

T3 455kHz 100

4-6 10

T4 10.7MHz 45 (Min) 1-3 11 82 pF

1-3 7

T5 10.7MHz 25 (Min)

4-6 7

82pF

390pF

180pF2-3 28

180pF

3

2
1

3

2
1

3

2
1

3

2
1

3

2
1

4

6

4

6

4

6

4

6

4

6

T6 455kHz 100

L6 796kHz 100

1-2 50

2-3 50

1-3 100

4-6 10

390pF

360µH

3

2
1

3

2
1

4

6

4

6

12

AM/FM 1 CHIP RADIO S1A0427B01

Coil No. f Q

0

Turns C.L. Connections (KWANG SUNG PART NO)

1-3 4-6

T1 10.7MHz 90

11 3

1-3 4-6

T2 10.7MHz 60

5 2

1-2 127
2-3 28

T3 455kHz 100

4-6 10

T4 10.7MHz 45min 1-3 11 82pF

82pF

390pF

180pF

3

2
1

KSI-FA3

3

2
1

KSI-FA5

3

2
1

KSI-AA3

3

2
1

4

6

4

6

4

6

4

6

T5 10.7MHz 45min

T6 455kHz 100

L6 796kHz 100

1-3 7

4-6 7

1-2 50

2-3 50

1-3 100

4-6 10

180pF

390pF

360uH

KSI-FD4

3

2
1

KSI-FA4

3

2
1

KSI-AA2

3
2

1

KSI-A03

4

6

4

6

4

6

13

S1A0427B01 AM/FM 1 CHIP RADIO

NOTES

14