MICRF011BM TR Micrel Inc, MICRF011BM TR Datasheet - Page 3

• Manufacturer Part Number: MICRF011BM TR
• Manufacturer: Micrel Inc

Specifications of MICRF011BM TR

• Operating Band Frequency: 300 to 440MHz
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Industrial
• Operating Supply Voltage (min): 4.75V
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (max): 5.5V
• Lead Free Status / Rohs Status: Not Compliant

MICRF011
No
.
1.
2.
3.
4.
5.
6.
December 1998b
SEL0
Local Oscillator sweep range
reduced 2X. Affects SWP mode
only.
Local Oscillator sweep rate reduced
2X. Affects SWP mode only.
IF Center Frequency reduced 2X.
Affects both modes SWP and
FIXED.
IF Bandwidth reduced 2X. Affects
both modes SWP and FIXED.
FIXED mode Demod Filter cutoff
frequencies increased 2X. Affects
FIXED mode only.
CTH Pin Impedance
118k
Affects both modes SWP and
FIXED.
1
0
1
0
@ ft=4.90 MHz [see Note 4].
Design Change
SEL1
1
1
0
0
Nominal Demodulator (Baseband) Filter Bandwidth
Reconsider Tx/Rx Frequency Alignment Error Budget, per App. Note 22.
If alignment tolerances cannot be met, consider:
Impacts SWP mode maximum data rate.
Factor this change into Tx/Rx Frequency Alignment Error Budget.
FIXED mode users of -001 must change crystal frequency.
Factor this change into Tx/Rx Frequency Alignment Error Budget.
For FIXED mode only, choose next lower filter frequency (via control pins
SEL0/1), to maintain same range performance
Recompute appropriate value of CTH capacitor, and change value on PCB
If data rate constraint cannot be met, consider
MICRF001/011 Change List and
SWP Mode
(1) tighten ceramic resonator tolerance,
(2) replace ceramic resonator with crystal, or
(3) not to upgrade to -011
(1) reduce system data rate by 2X, or
(2) not to upgrade to -011
vs. SEL0, SEL1 and Mode
Design Retrofit Guidelines
5000
1250
2500
625
QwikRadio
Table 1
Table 2
3
Demodulator Bandwidth (Hz)
tm
Retrofit Design Action
FIXED Mode
10000
1250
5000
2500
MICRF011
Micrel