RF2908 查看數據表（PDF） - RF Micro Devices

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RF2908

915MHZ SPREAD SPECTRUM RECEIVER WITH PLL FREQUENCY SYNTHESIZER

RF Micro Devices 

RF2908

Detailed Functional Block Diagram

LNA IN 6

SW GND1 7

SW GND2 9

LNA GND 5

PLL ON 35

RX ENABL 36

BW SEL2 37

BW SEL1 38

MIX VCC 3

MOUT I+ 11

MOUT I- 12

IN I+ 13

IN I- 14

OSC B 23

OSC E 24

10

8

LNA

4 1 2 48 47

44

17

20

-0.5/-20.5

+45°

-45°

0-25 dB

0-20 dB

-12-+12

17dB

6 dB

Chip

Control

Ref. Osc.

5-bit Counter

/32

902-928

MHz

300 kHz

VCO

Prescaler

32/33

Phase

Detector

Charge Pump

300 kHz

7-Bit Counter

/94

7-Bit Swallow

Counter

0-85

7

7-Bit

Latch

7 7-Bit Shift

Register

39 Q DATA

42 IF OUT Q

45 DCFB Q

22 RSSI I

41 VREF

40 RSSI Q

43 VGC

21 I DATA

19 IF OUT I

18 GND3

16 DCFB I

15 GND2

46 GND1

34 DO

26 PLL CLK

25 LE

27 PLL DATA

30 31

32 33 28 29

11

Rev C1 010904

11-95

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