參數(shù)資料
型號: RF2908
廠商: RF MICRO DEVICES INC
元件分類: 無繩電話/電話
英文描述: 915MHZ SPREAD SPECTRUM RECEIVER WITH PLL FREQUENCY SYNTHESIZER
中文描述: TELECOM, CELLULAR, RF AND BASEBAND CIRCUIT, PQFP48
封裝: PLASTIC, LQFP-48
文件頁數(shù): 11/18頁
文件大?。?/td> 534K
代理商: RF2908
11-95
RF2908
Rev C1 010904
11
T
Detailed Func tional Block Diagram
LNA
+45°
-45°
0-25 dB
0-20 dB
-12-+12
17dB
6 dB
-0.5/-20.5
Chip
Control
PLL ON
RX ENABL
BW SEL2
BW SEL1
RSSI Q
RSSI I
VREF
LNA IN
SW GND1
SW GND2
LNA GND
A
10
L
8
M
4
M
1
M
2
MIX VCC
MOUT I+
MOUT I-
IN I+
IN I-
GND1
GND2
GND3
DCFB I
V
17
DCFB Q
IF OUT Q
Q DATA
V
20
V
44
I
48 47
I
IF OUT I
I DATA
5-bit Counter
/32
Prescaler
32/33
7-Bit Swallow
Counter
0-85
7-Bit
Latch
Phase
Detector
Charge Pump
7-Bit Counter
/94
902-928
MHz
VCO
Ref. Osc.
300 kHz
300 kHz
OSC B
OSC E
L
L
R
R
DO
PLL CLK
LE
P
P
46
14
13
12
11
3
35
36
37
38
6
7
9
5
43
39
42
45
22
41
40
21
19
15
18
16
7
30 31
32 33
29
28
23
24
7-Bit Shift
Register
PLL DATA
7
26
25
27
34
VGC
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