micrf218 Micrel Semiconductor, micrf218 Datasheet - Page 12
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micrf218
Manufacturer Part Number
micrf218
Description
Micrf218 3.3v, Qwikradio 300 Mhz To 450 Mhz Receiver
Manufacturer
Micrel Semiconductor
Datasheet
1.MICRF218.pdf
(24 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
micrf218AYQS
Manufacturer:
MICREL
Quantity:
1 100
Part Number:
micrf218AYQS
Manufacturer:
MICREL/麦瑞
Quantity:
20 000
September 2007
Micrel
RF IN
J2
Notes:
1. 0V = Common
2. VDD Input = 3.0 to 3.3V
3. Ref-Osc Control:
100nH
0V = 315 MHz Operation,
VDD = 390.1 MHz Operation
L4
33pF
2.2pF
C3
C2
REF-OSC CNTR
3.0 to 3.3V
3.0 to 3.3V
L2
3.9nH
SHDN
COM
COM
IF BANDWIDTH
CONTROL
VDD = WIDE BANDWIDTH
0V
100nH
DO
L3
J3
= NARROW BANDWIDTH
1
2
3
4
5
6
7
Figure 4. Dual Frequency QR218BP_SWREF, 315 MHz and 390 MHz
ZCB-0603
L3
CON2
+3V
100nF
J4
1
2
NP = Not Placed
+3V
C5
NP
R3
NP
C1
Figure 5 Evaluation Board
R5
100K
1
2
3
4
5
6
7
8
REFOSC
RO1
GNDRF
ANT
GNDRF
VDD
IF_BW
SEL0
SHDN
U1 MICRF218AYQS
DATA OUT
J1
1
2
EXTERNAL REFERENCE
OSCILLATOR INPUT
12
NP
CAGC
C7
SEL1
RSSI
GND
RO2
CTH
NC
DO
16
15
14
13
12
11
10
9
0 OHMS
JPR1
R4
0 OHMS
JPR2
NP
C4
0.047µF
R8
10k
C5
4.7µF
R10
100k
R1
NP
R2
NP
+3V
9.8131MHz
TSDF1220W
R6
10k
Y1
Q1
R7
100k
+3V
12.1287MHz
TSDF1220W
(408) 944-0800
M9999-090607
R9
10k
Y2
Q2
MICRF218
R11
100k