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Micrel, Inc.
Typical Application
1/4 Wave Monopole
MICRF002
MICRF002/RF022
SEL0
SWEN
10pF
68nH
VSSRF
VSSRF
ANT
REFOSC
SEL1
CAGC
4.8970MHz
15nH
+5V
0.047μF
VDDRF
VDDBB
CTH
NC
WAKEB 4.7μF
SHUT
DO
VSSBB
Data
Output
315MHz 800bps On-Off Keyed Receiver
Pin Configuration
SEL0 1
VSSRF 2
VSSRF 3
ANT 4
16 SWEN
15 REFOSC
14 SEL1
13 CAGC
VDDRF 5
VDDBB 6
CTH 7
NC 8
16-Pin SOIC (M)
12 WAKEB
11 SHUT
10 DO
9 VSSBB
VSSRF 1
ANT 2
VDDRF 3
CTH 4
8 REFOSC
7 CAGC
6 SHUT/WAKEB
5 DO
8-Pin SOIC (M)
8-Pin Options
The standard 16-pin package allows complete control of
all configurable features. Some reduced function 8-pin
versions are also available, see “Ordering Information”
on page 1.
For high-volume applications additional customized 8-pin
SEL0
1
0
SEL1
1
1
Demodulator Bandwidth
Sweep-Mode Fixed-Mode
5000Hz 10000Hz
2500Hz 5000Hz
devices can be produced. SWEN, SEL0 and SEL1 pins
are internally bonded to reduce the pin count; pin 6 may
be configured as either SHUT or WAKEB
1
0
0
0
1250Hz
625Hz
2500Hz
1250Hz
Table 1. Nominal Demodulator Filter Bandwidth vs.
SEL0, SEL1 and Operating Mode
July 2008
2
M9999-070808
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