micrf218 Micrel Semiconductor, micrf218 Datasheet - Page 12

• Manufacturer Part Number: micrf218
• Description: Micrf218 3.3v, Qwikradio 300 Mhz To 450 Mhz Receiver
• Manufacturer: Micrel Semiconductor

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
[phone]
M9999-090607
R9
10k
Y2
Q2
MICRF218
R11
100k