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Micrel
Demodulator
MICRF211
Symbol
Parameter
Condition
Min
Typ
Max
Units
CTH Source
F REFOSC = 13.52127MHz
120
k ?
Impedance
CTH Leakage Current
T A = 25oC
T A = +105oC
±2
± 800
nA
nA
Demodulator Filter
Programmable, see application section
1625
13000
Hz
Bandwidth @ 434MHz
Digital / Control Functions
DO pin output current
As output
source @ 0.8 Vdd
260
μA
sink @ 0.2 Vdd
600
Output rise and fall
CI = 15pF, pin DO, 10-90%
2
μsec
times
RSSI
RSSI DC Output
Voltage Range
0.4 to 2
V
RSSI response slope
RSSI Output Current
RSSI Output
-110dBm to -40dBm
25
400
200
mV/dB
μA
?
Impedance
RSSI Response Time
50% data duty cycle, input power to
0.3
sec
Antenna = -20dBm
Note 1.
Note 2.
Note 3.
Note 4.
Note 5.
Exceeding the absolute maximum rating may damage the device.
The device is not guaranteed to function outside of its operating rating.
Device is ESD sensitive. Use appropriate ESD precautions. Exceeding the absolute maximum rating may damage the device.
Sensitivity is defined as the average signal level measured at the input necessary to achieve 10 -2 BER (bit error rate). The input signal is
defined as a return-to-zero (RZ) waveform with 50% average duty cycle (Manchester encoded) at a data rate of 1kbps.
When data burst does not contain preamble, duty cycle is defined as total duty cycle, including any “quiet” time between data bursts. When
data bursts contain preamble sufficient to charge the slice level on capacitor C TH , then duty cycle is the effective duty cycle of the burst
alone. [For example, 100msec burst with 50% duty cycle, and 100msec “quiet” time between bursts. If burst includes preamble, duty
cycle is T ON /(T ON +t OFF )= 50%; without preamble, duty cycle is T ON /(T ON + T OFF + T QUIET ) = 50msec/(200msec)=25%. T ON is the (Average
number of 1’s/burst) × bit time, and T OFF = T BURST – T ON .)
March 2007
4
M9999-030107
(408) 944-0800
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