SI4745-C10-GM datasheet(2/2 Pages) SILABS

部件名	SI4745-C10-GM

功能描述	Automotive AM/FM Radio Receiver

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制造商	SILABS [Silicon Laboratories]

网页	http://www.silabs.com

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2 / 2 page

AM/FM Receiver

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

Selected Electrical Specifications1

(VDD = 2.7 to 5.5 V, VIO = 1.5 to 3.6 V, TA = –40 to 85 °C)

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

Audio S/N (Mono)2,3

fMOD = 1 kHz, f = 22.5 kHz,

VEMF = 60 dBµVEMF

—

63

—

dB

Audio THD (Mono)2,3

fMOD = 1 kHz, f = 75 kHz,

VEMF = 60 dBµVEMF

—

0.1

—

%

Input IP3

f1 = 4000 kHz; f2 = 8000 kHz

—

105

—

dBµV EMF

Audio Output Voltage

—

80

—

mVrms

Adjacent Channel Selectivity

±200 kHz

—

50

—

dB

Alternate Channel Selectivity

±400 kHz

—

70

—

dB

AM Suppression4

m = 0.3;

f = 22.5 kHz; f

RF = 76 to 108 MHz;

Measured at VEMF = 60 dBµVEMF

—

55

—

dB

Audio Stereo Separation4

fRF = 76 to 108 MHz; Measured at VEMF =

60 dBµVEMF; f = 75 kHz

—

45

—

dB

Supply Voltage5

3

—

3.6

V

Supply Current5

—

26

—

mA

AM

Input Frequency

520

—

1710

kHz

Sensitivity

(S+N)/N = 26 dB

—

28

—

µV EMF

Audio S/N4,6

30% modulation, fMOD =1 kHz,

RF level = 74 dBµV EMF;

f = 22.5 kHz

—

53

—

dB

Audio THD4,6

30% modulation, fMOD =1 kHz,

RF level = 74 dBµV EMF;

f = 22.5 kHz

—

0.3

—

%

Input IP37

f1 = 40 kHz; f2 = 80 kHz

—

112

—

dBµV

Audio Output Voltage4

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.

BAF = 300 Hz to 15 kHz.

3.

fRF = 76 to 108 MHz.

4.

FMOD = 1 kHz, 75 µs de-emphasis, MONO = enabled, and L = R unless noted otherwise.

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

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