Silicon Laboratories SI4421 manual Si4421, AC Characteristics PLL parameters

									Si4421
AC Characteristics (PLL parameters)
	Symbol		Parameter	Conditions/Notes	Min		Typ	Max	Units
	fref		PLL reference frequency	(Note 2)	9	10		11	MHz
			Receiver LO/Transmitter carrier	433 MHz band, 2.5 kHz resolution	430.24			439.75
	fo								MHz
				868 MHz band, 5.0 kHz resolution	860.48			879.51
			frequency
				915 MHz band, 7.5 kHz resolution	900.72			929.27
	tlock		PLL lock time	Frequency error < 1kHz		30			µs
				after 10 MHz step
	tstP		PLL startup time (Note 10)	With a running crystal oscillator		200		300	µs
AC Characteristics (Receiver)
	Symbol		Parameter	Conditions/Notes	Min		Typ	Max	Units
				mode 0		67
				mode 1		134
	BW	Receiver bandwidth		mode 2		200			kHz
				mode 3		270
				mode 4		340
				mode 5		400
	BRRX		FSK bit rate (Note 10)	With internal digital filters	0.6			115.2	kbps
	BRARX		FSK bit rate (Note 10)	With analog filter				256	kbps
	Pmin		Receiver Sensitivity	BER 10-3, BW=67 kHz, BR=1.2 kbps,		-110			dBm
				868 MHz Band (Note 3)
	AFCrange		AFC locking range	δfFSK : FSK deviation in the received			0.8·δfFSK
				signal
	IIP3inh		Input IP3	In band interferers in high bands		-21			dBm
				(868 MHz, 915 MHz)
	IIP3outh		Input IP3	Out of band interferers l f-fol > 4 MHz		-18			dBm
	IIP3inl		IIP3 (LNA –6 dB gain)	In band interferers in low band (433		-15			dBm
				MHz)
	IIP3outl		IIP3 (LNA –6 dB gain)	Out of band interferers l f-fol > 4 MHz		-12			dBm
	Pmax		Maximum input power	LNA: high gain	0				dBm
	Cin	RF input capacitance				1			pF
	RSa		RSSI accuracy			± 6			dB
	RSr		RSSI range			46			dB
	RSps		RSSI power supply dependency	When input signal level lower than -54		+35			mV/V
				dBm and greater than -100 dBm
	CARSSI		Filter capacitor for ARSSI		1				nF
	RSstep		RSSI programmable level steps			6			dB
				Until the RSSI signal goes high after		500			µs
	RSresp		DRSSI response time	the input signal exceeds the
				preprogrammed limit CARRSI = 4.7 nF
	Psp_rx		Receiver spurious emission					-60	dBm

Notes are on page 12.

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