RFM22B/23B
Table 5. Auxiliary Block Specifications
Parameter
Symbol
Conditions
Min
Typ
Max
Units
Temperature Sensor
Accuracy
TS
After calibrated via sensor offset
register tvoffs[7:0]
—
0.5
—
°C
A
Temperature Sensor
Sensitivity
TS
—
—
5
50
250
—
—
—
mV/°C
mV
S
Low Battery Detector
Resolution
LBD
RES
Low Battery Detector
Conversion Time
LBD
—
—
µs
CT
Microcontroller Clock
Output Frequency
F
Configurable to 30 MHz,
15 MHz, 10 MHz, 4 MHz,
3 MHz, 2 MHz, 1 MHz, or
32.768 kHz
32.768K
30M
Hz
MC
General Purpose ADC
Resolution
ADC
ADC
—
—
—
8
4
—
—
—
bit
mV/bit
µs
ENB
RES
General Purpose ADC Bit
Resolution
Temp Sensor & General
Purpose ADC Conversion
Time
ADC
305
CT
30 MHz XTAL Start-Up time
t
—
—
600
97
—
—
µs
fF
30M
30 MHz XTAL Cap
Resolution
30M
RES
32 kHz XTAL Start-Up Time
t
—
—
6
—
—
sec
32k
100
ppm
32 kHz XTAL Accuracy
using 32 kHz XTAL
32K
RES
32 kHz Accuracy using
Internal RC Oscillator
32KRC
—
2500
—
ppm
RES
POR Reset Time
t
—
—
16
—
—
ms
µs
POR
Software Reset Time
t
100
soft
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