Si4012
Table 3. Si4012 RF Transmitter Characteristics (Continued)
(TA = 25° C, VDD = 3.3 V, RL = 550 , unless otherwise noted)
Parameter
Symbol
Test Condition
Min
Typ
Max Unit
FSK Deviation
OOK Modulation depth
Max frequency deviation
—
300
—
ppm
Deviation resolution
—
2
—
ppm
Deviation accuracy
TBD
ppm
Max frequency deviation,
—
30
—
kHz
100 MHz
Deviation resolution,
100 MHz
—
200
—
Hz
Max frequency deviation,
—
95
—
kHz
315 MHz
Deviation resolution, 315 MHz —
630
—
Hz
Max frequency deviation,
—
130
—
kHz
433.92 MHz
Deviation resolution,
433.92 MHz
—
868
—
Hz
Max frequency deviation,
—
260
—
kHz
868 MHz
Deviation resolution, 868 MHz —
1740
—
Hz
Max frequency deviation,
—
275
—
kHz
915 MHz
Deviation resolution, 915 MHz —
1830
—
Hz
60
—
—
dB
Antenna Tuning Capacitive
Range (Differential)
315 MHz
2.4
—
12.5
pF
Notes:
1. The frequency range is continuous over the specified range.
2. The frequency step size is limited by the frequency noise.
3. Optimum differential load is equal to 4 V/(11.5mA/2 * 4/PI) = 550 Therefore the antenna load resistance in parallel
with the Si4012 differential output resistance should equal 600
Rev 0.1
7