Rainbow Electronics RF12 - Manual (Page 9)

RF12
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I
dd_RX
Supply current (RX mode)
315/433 MHz bands
868 MHz band
915 MHz band
11
12
13
13
14
15
mA
I
pd
Standby current (Sleep
mode)
All blocks disabled 0.3 µA
I
lb
Low battery voltage
detector current
consumption
0.5 µA
I
wt
Wake-up timer current
consumption
1.5 µA
I
x
Idle current
Crystal oscillator and
baseband parts are on
3 3.5 mA
V
lb
Low battery detect
threshold
Programmable in 0.1 V
steps
2.2 5.3 V
V
lba
Low battery detection
accuracy ±75
mV
V
il
Digital input low level
voltage
0.3*V
dd
V
V
ih
Digital input high level
voltage
0.7*V
dd
V
I
il
Digital input current V
il
= 0 V -1 1 µA
I
ih
Digital input current V
ih
= V
dd
, V
dd
= 5.4 V -1 1 µA
V
ol
Digital output low level I
ol
= 2 mA 0.4 V
V
oh
Digital output high level I
oh
= -2 mA V
dd
-0.4 V
AC Characteristics (PLL parameters)
Symbol Parameter Conditions/Notes Min Typ Max Units
f
ref
PLL reference
frequency
(Note 1) 8 10 12 MHz
f
o
Receiver LO /
Transmitter carrier
frequency
315MHz band,2.5kHz resolution
433MHz band,2.5kHz resolution
868MHz band,5.0kHz resolution
915MHz band,7.5kHz resolution
310.24
430.24
860.48
900.72
319.75
439.75
879.51
929.27
MHz
t
lock
PLL lock time
Frequency error < 1kHz after
10MHz step
20 us
t
st, P
PLL startup time With a running crystal oscillator 250 us