MICRF002BM Micrel Inc, MICRF002BM Datasheet - Page 10

• Manufacturer Part Number: MICRF002BM
• Description: IC ASK RCVR RF/IF SHUTDWN 16SOIC
• Manufacturer: Micrel Inc

Specifications of MICRF002BM

• Frequency: 300MHz ~ 440MHz
• Sensitivity: -95dBm
• 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
• Features: Automatic Tuning
• Voltage - Supply: 4.75 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 16-SOIC (0.154", 3.90mm Width)
• No. Of Driver/receivers: 0/1
• Peak Reflow Compatible (260 C): No
• Current Rating: 0.01A
• Supply Voltage Max: 5.5V
• Data Rate Max: 10Kbps
• Leaded Process Compatible: No
• Mounting Type: Surface Mount
• Supply Current: 2.4mA
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Memory Size: -
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant, Contains lead / RoHS non-compliant

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