MICRF218 Datasheet, PDF (12/24 Pages) Micrel Semiconductor – 3.3V, QwikRadio® 300 MHz to 450 MHz Receiver

Micrel
MICRF218
J4
IF BANDWIDTH 1
CONTROL
2
CON2
C1
NP
VDD = WIDE BANDWIDTH
0V = NARROW BANDWIDTH
J2
L4
C2
RF IN 100nH 2.2pF
L3
100nH
C3
33pF
L2
3.9nH
+3V
C5
100nF
Notes:
1. 0V = Common
2. VDD Input = 3.0 to 3.3V
3. Ref-Osc Control:
0V = 315 MHz Operation,
VDD = 390.1 MHz Operation
J3
3.0 to 3.3V 1
3.0 to 3.3V 2
COM 3
SHDN 4
DO 5
REF-OSC CNTR 6
COM 7
R3
NP
+3V
L3
ZCB-0603
NP = Not Placed
J1
1 EXTERNAL REFERENCE
2 OSCILLATOR INPUT
REFOSC
U1 MICRF218AYQS
1 _RO1
RO2 ¹⁶
2 _GNDRF
NC ¹⁵
3 _ANT
RSSI ¹⁴
4 _GNDRF
CAGC ¹³
5 _VDD
CTH ¹²
6 _{IF_BW}
SEL1 ¹¹
7 _SEL0
DO ¹⁰
8 _SHDN
GND ⁹
JPR1
0 OHMS
JPR2
NP
C4
0.047µF
+3V
Y1
9.8131MHz
R1
NP
R2
NP
C5
4.7µF
TSDF1220W
Q1
R7
100k
R5
100K
C7
NP
DATA OUT
R4
0 OHMS
R8
10k
R10
100k
R6
10k
+3V
Y2
12.1287MHz
TSDF1220W
Q2
R11
100k
R9
10k
Figure 4. Dual Frequency QR218BP_SWREF, 315 MHz and 390 MHz
Figure 5 Evaluation Board
September 2007
12
M9999-090607
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