MICRF022BM-FS48 Micrel Inc, MICRF022BM-FS48 Datasheet - Page 10
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MICRF022BM-FS48
Manufacturer Part Number
MICRF022BM-FS48
Description
IC RECEIVER ASK 300-440MHZ 8SOIC
Manufacturer
Micrel Inc
Datasheet
1.MICRF002YM.pdf
(17 pages)
Specifications of MICRF022BM-FS48
Frequency
300MHz ~ 440MHz
Sensitivity
-97dBm
Data Rate - Maximum
10 kbps
Modulation Or Protocol
ASK, OOK
Applications
RKE
Current - Receiving
2.2mA
Data Interface
PCB, Surface Mount
Antenna Connector
PCB, Surface Mount
Voltage - Supply
4.75 V ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Package / Case
8-SOIC (0.154", 3.90mm Width)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Features
-
Memory Size
-
for the vast majority of applications. If adjustment is
required the constant may be varied by adding a resistor in
parallel with the C
must be determined on a case by case basis.
Step 5: Selecting The Demod Filter Bandwidth
The inputs SEL0 and SEL1 control the demodulator filter
bandwidth in four binary steps (625Hz to 5000Hz in sweep,
1250Hz to 10000Hz in fixed-mode), see Table 3.
Bandwidth must be selected according to the application.
The demodulator bandwidth should be set according to
Equation 8:
Micrel, Inc.
July 2008
AGC
capacitor. The value of the resistor
10
(8)
It should be noted that the values indicated in Table 1 are
nominal values. The filter bandwidth scales linearly with
frequency so the exact value will depend on the operating
frequency. Refer to the “Electrical Characteristics” for the
exact filter bandwidth at a chosen frequency.
SEL0
1
0
1
0
Table 1. Nominal Demodulator Filter Bandwidth vs.
Demoulator
SEL1
1
1
0
0
SEL0, SEL1 and Operating Mode
bandwidth
Sweep-Mode
5000Hz
2500Hz
1250Hz
Demodulator Bandwidth
625Hz
=
Shortest
MICRF002/RF022
M9999-070808
Fixed-Mode
0.65
pulse
10000Hz
5000Hz
2500Hz
1250Hz
−
width