5.5 RF Receiving Characteristics

All parameters refer to GND (backplane) and are valid for T_amb = -40°C to +85°C, V_VS = 1.9-3.6V (3V application) and 2.4-5.5V (5V application) over all process tolerances unless otherwise specified. Typical values are given at V_VS = 5V, T_amb = 25°C and for a typical process unless otherwise specified. Crystal oscillator frequency f_XTO = 24.305 MHz. Standard EEPROM settings are used unless marked with ^*1.


No.	Parameters	Test Conditions	Pin	Symbol	Min.	Typ.	Max.	Unit	Type*
Frequency Ranges and Frequency Resolution of PLL for RXMode, TXMode and PollingMode
3.00	RF operating frequency range 315 MHz Low-band	FECR.LBNHB = `1` FECR.S4N3 = `0`	1, 7	f_{Range_LB1_315}	310	315	318	MHz	A
3.10	RF operating frequency range 433 MHz Low-band	FECR.LBNHB = `1` FECR.S4N3 = `1`	1, 7	f_{Range_LB2_433}	418	433.92	477	MHz	B
3.30	RF operating frequency range High-band	FECR.LBNHB = `0` FECR.S4N3 = `0`	2, 7	f_{Range_B4_868}	836	868.3	956	MHz	B
3.40	Frequency resolution PLL	Low-band f_XTO/2¹⁸	1, 2, 7	DF_PLL	—	92.72	—	Hz	B
3.40	Frequency resolution PLL	High-band f_XTO/2¹⁷	1, 2, 7	DF_PLL	—	185.43	—	Hz	B
RXMode and PollingMode Receive Characteristics IF bandwidth specifications are examples usable for parameter extrapolation if other IF bandwidth values are used
4.00	Receiver 3 dB bandwidth	Programmable digital IF filter	1, 2	BW_IF	25	—	366	kHz	B
4.10	ASK and FSK transparent mode data rate Manchester mode	at 25 kHz IF-BW	1, 2	DR_TM	0.25	—	7	Kbit/s	B
		at 50 kHz IF-BW					14		B
		at 80 kHz IF-BW					20		B
		at 165 kHz IF-BW					50		B
		at 237 kHz IF-BW					80		B
		at 366 kHz IF-BW					80		B
4.20	Modulation index FSK	η = frequency_deviation/symbol_rate recommended	1, 2	η	0.5 0.75	1	360 1.25	—	B B
4.30	Frequency deviation	Maximum usable frequency deviation is base-band clock dependant f_{DEV_Max} = CLK_BB/8	1, 2	f_DEV	—	–	—	kHz	—
		at 25 kHz IF-BW			±0.375		±9		B
		at 50 kHz IF-BW			±0.75		±18		B
		at 80 kHz IF-BW			±1.2		±26		B
		at 165 kHz IF-BW			±2.5		±60		B
		at 237 kHz IF-BW			±3.5		±93		B
		at 366 kHz IF-BW			±5.4		±93		B
4.40	ASK and FSK transparent mode symbol rate NRZ mode	Used to receive NRZ, Keyloq, PPM, 1/3 2/3 Coded telegrams	1, 2	SR_{TM_OPT}	0.5	—	—	Ksym/s	—
		at 25 kHz IF-BW					14		B
		at 50 kHz IF-BW					28		B
		at 80 kHz IF-BW					40		B
		at 165 kHz IF-BW					100		B
		at 237 kHz IF-BW					160		B
		at 366 kHz IF-BW					160		B
4.70	Data rate tolerance FSK and ASK	Loss of sensitivity <1 dB	1, 2	DR_TOL	-10	—	+10	%	B
4.80	Buffered data rate Manchester and NRZ mode	TMDO output is buffered internally and readout via SPI interface	1, 2	DR_Buffered	—	—	—	—	—
		Manchester mode			0.25		80	Kbit/s	B
		NRZ mode			0.5		120	Ksym/s	B
4.90	FSK Sensitivity level 315MHz/433.92MHz Manchester encoded Receiving100 bit Packets with 9 of 10 Packets Error Free or BER = 10^-3 Continuous RX measured at TMDO output or buffered via SPI for DR < DR Buffered	FSK at 25 kHz IF bandwidth T_amb = 25°C	(1), 17, 19	—	-3dB	—	+3 dB	dBm	—
		0.75 Kbit/s ± 0.75 kHz		SFSK_{B25_R0.75}		-122.5			B
		5 Kbit/s ± 2.4 kHz		SFSK_{B25_R5_2.4}		-113.5			B
5.00		FSK at 80 kHz IF bandwidth T_amb = 25°C	(1), 17, 19	—	-3 dB	—	+3 dB	dBm	—
		2.4 Kbit/s ± 2.4 kHz		SFSK_{B80_R2_4}		-117			B
		20 Kbit/s ± 20 kHz		SFSK_{B80_R20}		-108.5			B
5.10		FSK at 165 kHz IF bandwidth T_amb = 25°C	(1), 17, 19	—	-3 dB	—	+3 dB	dBm	—
		5 Kbit/s ± 5 kHz		SFSK_{B165_R5}		-114			B
		40 Kbit/s ± 40 kHz		SFSK_{B165_R40}		-105.5			B
5.20	ASK Sensitivity level 315 MHz/433.92 MHz Manchester encoded Receiving 100-bit Packets with 9 of 10 Packets Error Free or BER = 10^-3 Continuous RX measured at TMDO output or buffered via SPI for DR < DR_Buffered	FSK at 366 kHz IF bandwidth T_amb = 25°C	(1), 17, 19	—	-3dB	—	+3 dB	dBm	—
		20 Kbit/s ± 20 kHz		SFSK_{B366_R20}		-107.5			B
		80 Kbit/s ± 80 kHz		SFSK_{B366_R80}		-100.5			B
5.30		ASK at 25 kHz IF bandwidth (100% ASK level of carrier value) T_amb = 25°C	—	—	—	—	+3 dB	dBm	—
		0.5 Kbit/s	(1), 17, 19	SASK_{B25_R0_5}	-3 dB	-125			B
		5 Kbit/s	(1), 17, 19	SASK_{B25_R5}	-3 dB	-117.5			B
5.40		ASK at 80 kHz IF bandwidth (100% ASK level of carrier value) T_amb = 25°C	—	—	—	—	—	—	—
		1 Kbit/s	—	SASK_{B80_R1}	-3 dB	-121.5	+3 dB	dBm	B
		20 Kbit/s	(1), 17,19	SASK_{B80_R20}	-3 dB	-110.5	+3 dB	dBm	B
5.50		ASK at 165 kHz IF bandwidth (100% ASK level of carrier value) T_amb = 25°C	—	—	-3 dB	—	+3 dB	dBm	—
		1 Kbit/s	(1), 17, 19	SASK_{B165_R1}		-120.5			B
		40 Kbit/s	(1), 17, 19	SASK_{B165_R40}		-107.5			B
5.60		ASK at 366 kHz IF bandwidth (100% ASK level of carrier value) T_amb = 25°C	(1), 17,19	—	-3 dB	—	+3 dB	dBm	—
		1 Kbit/s		SASK_{B366_R1}		-118.5			B
		80 Kbit/s		SASK_{B366_R80}		-103.5			B
5.70	Sensitivity change High-band	High-band 868.3 MHz compared to Low-band sensitivity to be added to min/typ/max values of parameters no. 4.90 to 5.6	(2)	ΔS_HB	1	1	1	dB	B
5.80	Sensitivity change Full ambient temperature range	T_amb = -40°C to +85°C	(1) (2)	—	—	—	—	—	—
		Low-band^*1		ΔS_{Tamb_LB}	-1.5		2	dB	C
		High-band		ΔS_{Tamb_HB}	-2		3	dB	C
		S = S_{FSK_ASK}+ΔS		—	—		—	—	—
5.90	Sensitivity change NRZ	Compared to Machester NRZ using no more than 8 succeeding ‘`0`’ or ‘`1`’ symbols	(1,2)	ΔS_NRZ	—	—	—	—	—
		FSK			-1	0	2	dB	C
		ASK			0	2	4		C
		S = S_{FSK_ASK}+ΔS			—	—	—		—
6.00	Sensitivity change TRPA/B raw data	Compared to matched filter TMDO signal on pin 17, Manchester encoded	(1,2), 16, 17, 19	ΔS_{RAW_DATA}	—	—	—	dB	—
		ASK				2.5			B
		FSK				1.5			B
		S = S_{FSK_ASK} +ΔS				—			—
6.20	Sensitivity change for frequency deviations lower than configured	Configured for maximum f_DEVM. Sensitivity degradation at f_DEVM/3 compared to f_DEVM, S = S_{FSK_ASK}+ΔS	(1,2)	ΔS_{:fdevM_3}	—	2	3	dB	C
6.30	Value change from ASK level to OOK level	To calculate OOK values from ASK 100% level of carrier values. For example, 2.4 Kbit at 165 kHz IF bandwidth ASK: 100% level of Carrier – 117 dBm = OOK: -111 dBm S_OOK = S_ASK+D_OOK	(1,2)	ΔOOK	6	6	6	dB	D
6.90	315MHz/ 433 MHz blocking Manchester encoded Useful signal level increased 3 dB above sensitivity level Blocking measured relative to useful signal level Receiving 100-bit Packets with 9 of 10 Packets Error Free or BER = 10^-3 Continuous RX Excluding spurious receiving frequencies	At 25 kHz IF bandwidth, FSK, T_amb = 25°C 2.4 Kbit/s ± 2.4 kHz	(1,2)	fdist.≥ 50 kHz	—	40	—	dBc	C
				fdist.≥ 100 kHz		46			C
				fdist.≥ 225 kHz		58			C
				fdist.≥ 450 kHz		64			C
				fdist.≥ 1 MHz		73			C
				fdist.≥ 4 MHz		78			C
				fdist.≥10MHz		78			C
7.00		At 80 kHz IF bandwidth, FSK, T_amb = 25°C 10 Kbit/s ± 10 kHz	(1,2)	fdist. ≥ 150 kHz	—	45	—	dBc	C
				fdist. ≥ 225 kHz		52			C
				fdist. ≥ 450 kHz		58			C
				fdist. ≥ 1 MHz		67			C
				fdist. ≥ 4 MHz		71			C
				fdist. ≥ 10 MHz		71			C
7.10		At 165 kHz IF bandwidth,FSK, T_amb = 25°C 20 Kbit/s ± 20 kHz	(1,2)	fdist. ≥ 225 kHz	—	48	—	dBc	C
				fdist. ≥ 450 kHz		54			C
				fdist. ≥ 1 MHz		64			C
				fdist.≥ 4 MHz		68			C
				fdist.≥ 10 MHz		68			C
7.20		At 366 kHz IF bandwidth, FSK, T_amb = 25°C 20 Kbit/s ± 20 kHz	(1,2)	fdist. ≥ 500 kHz	—	55	—	dBc	C
				fdist. ≥ 1 MHz		64			C
				fdist. ≥ 4 MHz		68			C
				fdist.≥ 10 MHz		68			C
7.30	868 MHz/915 MHz blocking Manchester encoded Useful signal level increased 3 dB above unblocked sensitivity level Blocking measured relative to useful signal level Receiving 100-bit Packets with 9 of 10 Packets Error Free or BER = 10^-3 Continuous RX Excluding spurious receiving frequencies	At 25 kHz IF bandwidth, FSK, T_amb = 25°C 2.4 Kbit/s ± 2.4 kHz	(1,2)	fdist. ≥ 50 kHz	—	34	––	dBc	C
				fdist.≥ 100 kHz	—	40			C
				fdist. ≥ 225 kHz		52			C
				fdist. ≥ 450 kHz		58			C
				fdist. ≥ 1 MHz		67			C
				fdist. ≥ 4 MHz		75			C
				fdist. > 10 MHz	—	75			C
7.40		At 80 kHz IF bandwidth, FSK, T_amb = 25°C 10 Kbit/s ± 10 kHz	—	fdist.≥ 150 kHz	—	39	—	—	C
			—	fdist. ≥ 225 kHz	—	46	—	—	C
			(1,2)	fdist.≥ 450 kHz	—	52	—	dBc	C
				fdist. ≥ 1 MHz		62			C
				fdist. ≥ 4 MHz		68			C
				fdist. > 10 MHz		68			C
7.50		At 165 kHz IF bandwidth, FSK, T_amb = 25°C 20 Kbit/s ± 20 kHz	(1,2)	fdist.≥ 225 kHz	—	42	—	dBc	C
				fdist. ≥ 450 kHz		48			C
				fdist. ≥ 1 MHz		58			C
				fdist. ≥ 4 MHz		65			C
				fdist. > 10 MHz		65			C
7.60		At 366 kHz IF bandwidth, FSK, T_amb = 25°C 20 Kbit/s ± 20 kHz	(1,2)	fdist.≥ 500 kHz	—	49	—	dBc	C
				fdist.≥ 1 MHz		58			C
				fdist. ≥ 4 MHz		65			C
				fdist. > 10 MHz		65			C
7.70	Image rejection	Low-band	(1,2)	IM_RED	45	55	—	dB	A
		High-band			38	47	—	dB	A
		no adaptive algorithm used; therefore,numbers valid if large disturber applied before useful signal			—	—	—	—	—
7.80	Blocking 3f_LO, 5f_LO	Low-band	(1,2)	BL_NfLO	—	—	—	dB	—
		3*f_LO-f_IF			27	32	37		C
		5*f_LO+f_IF			28	33	38		C
		High-band			—	—	—		—
		3*f_LO-f_IF			—	39	—		C
		5*f_LO+f_IF			—	45	—		C
7.90	Nominal IF frequency	RxDSP property depends on nominal RF frequency and DIV_IF f_IF = f_RF/(DIV_IF * 6)	—	f_IF	242	251	276	kHz	B
8.10	System input referred compression point	No AGC is used; therefore, the full dynamic is available to receive signals at sensitivity level on pin	(1,2)	ICP_1dB	—	-45	—	dBm	B
8.20	System input referred 3rd-order intercept point	Low-band High-band	(1,2)	IIP3	—	-35 -37	—	dBm	C
8.30	Max, useful RX input level without damping	System works from sensitivity level up to that level with BER = 10^-3	(1,2)	P_{In_max1}	-10	+10	—	dBm	C
8.40	Max, useful RX input level with damping	System works from sensitivity level up to that level with BER = 10^-3	4	P_{In_max2}	+5	+10	—	dBm	C
8.50	Input impedance	Measured on application board,RC parallel equivalent circuit	—	Z_in	-20%	—	+20%	—	—
		315 MHz	1			870		Ω	C
		315 MHz	1			2.9		pF	C
		433.92 MHz	1			400		Ω	C
		433.92 MHz	1			2.9		pF	C
		868.3 MHz	2			340		Ω	C
		868.3 MHz	2			1.4		pF	C
		915 MHz	2			330		Ω	C
		915 MHz	2			1.4		pF	C
8.60	LNA amplitude detector switch level	Firmware switches SPDT to damping on if a level above S_Gainswitch is present during start of RXMode	(1,2)	P_Gainswitch	—	-39	—	dBm	B
8.70	SPDT switch RX insertion loss	Damping-off Sensitivity matching RF_IN with SPDT to 50W compared to matching RF_IN directly to 50W	(3,4)	IL_{Switch_RX}	—	—	—	—	—
		Low-band, 433.92 MHz				0.7	1.1	dB	C
		High-band, 868 MHz				1.0	1.4	dB	C
8.80	SPDT switch RX damping ON	Same matching as parameter no. 8.70 This influences the blocking behavior if measured at pin 4	(3,4)	D_switch	—	—	—	—	—
		Low-band			14	15	16	dB	C
		High-band			17	18	19	dB	C
8.90	LO spurious at LNA input	freq > 1 GHz	(1,2)	P_{LO_LNA_IN}	—	-60	-50	dBm	C
8.90	LO spurious at LNA input	freq < 1 GHz	(1,2)	P_{LO_LNA_IN}	—	-86	-60	dBm	C
9.00	RSSI accuracy	P_{RFIN_LB(HB)} = -70 dBm	(1,2), 4	RSSI_{ABS_ACCU}	—	—	—	dB	B
		Low-band			-5.0		+5.0
		High-band			-5.5		+5.5
9.10	RSSI relative accuracy	Measurement range -100 dBm to -50 dBm	(1,2), 4	RSSI_{REL_ACCU}	-1	—	+1	dB	B
9.20	RSSI resolution	DSP property	(1,2), 4	RSSI_RES	—	0.5	—	dB/value	D

Note: ^*1 Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples and D = Design parameter. A pin number in brackets means that they are measured matched to 50Ω on the application board.

ATA8510/15

5.5 RF Receiving Characteristics