SI4012 Silicon Laboratories, SI4012 Datasheet - Page 7

• Manufacturer Part Number: SI4012
• Description: CRYSTAL-LESS RF TRANSMITTER
• Manufacturer: Silicon Laboratories

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Table 3. Si4012 RF Transmitter Characteristics (Continued)
(TA = 25° C, VDD = 3.3 V, RL = 550 , unless otherwise noted)
Parameter
FSK Deviation
OOK Modulation depth
Notes:
Antenna Tuning Capacitive
Range (Differential)
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 
Symbol
Deviation resolution, 315 MHz
Deviation resolution, 868 MHz
Deviation resolution, 915 MHz
Max frequency deviation,
Max frequency deviation,
Max frequency deviation,
Max frequency deviation,
Max frequency deviation,
Max frequency deviation
Deviation resolution,
Deviation resolution,
Deviation resolution
Deviation accuracy
Test Condition
433.92 MHz
433.92 MHz
100 MHz
100 MHz
315 MHz
868 MHz
915 MHz
315 MHz
Rev 0.1
Min
2.4
—
—
—
—
—
—
—
60
—
—
—
—
—
1740
1830
TBD
Typ
300
200
630
130
868
260
275
30
95
—
—
2
Max
12.5
—
—
—
—
—
—
—
—
—
—
—
—
—
Si4012
Unit
ppm
ppm
ppm
kHz
kHz
kHz
kHz
kHz
Hz
Hz
Hz
Hz
Hz
dB
pF
7
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