AM/FM Receiver

Copyright © 2008 by Silicon Laboratories

10.23.08

Silicon Laboratories and Silicon Labs are trademarks of Silicon Laboratories Inc.

Other products or brandnames mentioned herein are trademarks or registered trademarks of their respective holders.

Si4740/41/42/43/44/45

Automotive AM/FM Radio Receiver

Parameter

Test Condition

Min

Typ

Max

Unit

FM

Input Frequency

64

—

108

MHz

Sensitivity

(S+N)/N = 26 dB

—

2

—

µV EMF

RDS Sensitivity

f = 2 kHz, RDS BLER < 5%

—

8

—

µV EMF

—

63

—

dB

—

0.1

—

%

Input IP3

—

105

—

dBµV EMF

Audio Output Voltage

—

80

—

mVrms

Adjacent Channel Selectivity

±200 kHz

—

50

—

dB

Alternate Channel Selectivity

±400 kHz

—

70

—

dB

m = 0.3;

f = 22.5 kHz; f

—

55

—

dB

—

45

—

dB

3

—

3.6

V

—

26

—

mA

AM

Input Frequency

520

—

1710

kHz

Sensitivity

(S+N)/N = 26 dB

—

28

—

µV EMF

RF level = 74 dBµV EMF;

f = 22.5 kHz

—

53

—

dB

RF level = 74 dBµV EMF;

f = 22.5 kHz

—

0.3

—

%

—

112

—

dBµV

54

60

66

mVrms

Adjacent Channel Selectivity

±10 kHz

—

40

—

dB

Alternate Channel Selectivity

±20 kHz

—

60

—

dB

Notes:

1.

Specifications refer to Si474x application circuit input.

2.

3.

4.

5.

Applies to both FM and AM modes.

6.

AGC is disabled.

7.

Specification refers to Si474x input.

Pin Assignments

GND

PAD

1

2

3

21

22

23

24

14

15

16

17

7

8

9

10

4

5

20

13

11

19

18

12

6

DFS

DOUT

LOUT

ROUT

AMI

FMI

NC

GND

RFGND

AGC1

VDD

GND

Symbol

Millimeters

Min

Nom

Max

A

0.80

0.85

0.90

A1

0.00

0.02

0.05

b

0.18

0.25

0.30

D

4.00 BSC

D2

2.00

2.10

2.20

e

0.50 BSC

E

4.00 BSC

E2

2.00

2.10

2.20

L

0.30

0.40

0.50

aaa

—

—

0.10

bbb

—

—

0.10

ccc

—

—

0.08

ddd

—

—

0.10

eee

—

—

0.10

4x4x0.85 mm 24-pin QFN Package Information