5.6 RF Transmit 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
See parameters 3.00 to 3.40.
TXMode Transmit Characteristics
10.00	Output power range	T_amb = 25°C	(7)	P_Range	-12	–	+14.5	dBm	B
10.10	Output power programming steps	Optimum load impedance for each power step. Up to two times higher steps for fixed load impedance.	(7)	ΔP_OUT	—	0.4	—	dB	—
10.20	Output power at 6 dBm	T_amb = 25°C using 6 dBm matching FEPAC = 35 (Low-band) FEPAC = 36 (High-band)	(7)	P_{out_6dBm}	-1.5 dB	6	+1.5 dB	dBm	B
10.30	Output second harmonic at 6 dBm	T_amb = 25°C using 6 dBm matching	(7)	HM2_6dBm	—	—	—	dBc	—
		315 MHz, FEPAC = 35				-30			C
		433.92 MHz, FEPAC = 35				-36			C
		868.3 MHz, FEPAC = 36				-35			C
		915MHz, FEPAC = 36				-35			C
10.40	Output third harmonic at 6 dBm	T_amb = 25°C using 6 dBm matching	(7)	HM3_6dBm	—	—	—	dBc	—
		315 MHz, FEPAC = 35				-33			C
		433.92 MHz, FEPAC = 35				-41			C
		868.3 MHz, FEPAC = 36				-58			C
		915 MHz, FEPAC = 36				-58			C
10.50	TXMode current consumption at 6 dBm	6 dBm matching	(7), 8, 13	I_{TXMode_6dBm}	—	—	—	mA	—
		315 MHz, FEPAC = 35				8.7	11		B
		433.92 MHz, FEPAC = 35				9.1	12		B
		868.3 MHz, FEPAC = 36				11.5	14.5		B
		915 MHz, FEPAC = 36				11.7	15		B
10.60	Output power at 10 dBm	T_amb = 25°C using 10 dBm matching FEPAC = 46 (Low-band) FEPAC = 47 (High-band)	(7)	P_{out_10dBm}	-1.5dB	10	+1.5 dB	dBm	B
10.70	Output second harmonic at 10 dBm	T_amb = 25°C using 10 dBm matching	(7)	HM2_10dBm	—	—	—	dBc	—
		315 MHz, FEPAC = 46				-24			C
		433.92 MHz, FEPAC = 46				-28			C
		868.3 MHz, FEPAC = 47				-24			C
		915 MHz, FEPAC = 47				-27			C
10.80	Output third harmonic at 10 dBm	T_amb = 25°C using 10 dBm matching	(7)	HM3_10dBm	—	—	—	dBc	—
		315 MHz, FEPAC = 46				-25			C
		433.92 MHz, FEPAC = 46				-34			C
		868.3 MHz, FEPAC = 47				-50			C
		915 MHz, FEPAC = 47				-55			C
10.90	TXMode current consumption at 10 dBm	10 dBm matching	(7), 8, 13	I_{TXMode_10dBm}	—	—	—	mA	—
		315 MHz, FEPAC = 46				13.1	17		B
		433.92 MHz, FEPAC = 46				13.8	18.5		B
		868.3 MHz, FEPAC = 47				17.4	22.5		B
		915 MHz, FEPAC = 47				17.4	23		B
11.00	Output power at 14 dBm	T_amb = 25°C using 14 dBm matching FEPAC = 56 (Low-band) FEPAC = 57 (High-band)	(7)	P_{out_14dBm}	-1.5 dB	14	+1.5 dB	dBm	B
11.10	Output second harmonic at 14 dBm	T_amb = 25°C using 14 dBm matching		HM2_14dBm	—	—	—	dBc	—
		315 MHz, FEPAC = 56				-30			C
		433.92 MHz FEPAC = 56	(7)			-30			C
		868.3 MHz, FEPAC = 57	(7)			-24			C
		915 MHz, FEPAC = 57				-24			C
11.20	Output third harmonic at 14 dBm	Tamb = 25°C using 14 dBm matching	(7)	HM3_14dBm	—	—	—	dBc	—
		315 MHz, FEPAC = 56				-30			C
		433.92 MHz, FEPAC= 56				-31			C
		868.3 MHz, FEPAC = 57				-50			C
		915MHz, FEPAC = 57				-51			C
11.30	TXMode current consumption at 14 dBm	14 dBm matching	(7), 8, 13	I_{TXMode_14dBm}	—	—	—	mA	—
		315 MHz, FEPAC = 56				24.3	33		B
		433.92 MHz, FEPAC = 56				26.3	36		B
		868.3 MHz, FEPAC = 57				32.7	45		B
		915 MHz, FEPAC = 57				33.5	46		B
11.40	Output power change one full temperature and supply voltage range	Low-band, High-band 0 to ≤ 10 dBm	(7)	ΔP_TambVs1	—	—	—	dB	—
		V_{VS_PA} = 3.0V			-1.5		+1.5		C
		5V application: V_{VS_PA} = 2.7-3.3V			-3		+2		C
		3V application: V_{VS_PA} = 1.9-3.6V			-5.5		+2.5		C
		P = P_out+ΔP			—		—		—
11.50	Output power change two full temperature and supply voltage range	High-band> 10-14 dBm	(7)	ΔP_TambVs2	—	—	—	dB	—
		V_{VS_PA} = 3.0V			-3		+1.5		C
		5V application: V_{VS_PA} = 2.7-3.3V			-4		2.5		C
		3V application: V_{VS_PA} = 2.1-3.6V			-6		+3		C
		P = P_out+ΔP			—		—		—
11.60	Spurious emission	Low-band:	(7)	SP_TX	—	—	—	dBc	—
		at ± f_XTO				-80	-65		B
		at ± f_AVR(f_XTO/4)				-85	-65		C
		at ± f_{CLK_OUT}(f_XTO/6)				-80	-65		C
		at ± f_XTO				-72	-60		B
		at ± f_AVR (f_XTO/4)				-85	-60		C
		at ± f_{CLK_OUT}(f_XTO/6)				-78	-60		C
11.70	TX transparent data rate in Manchester and NRZ mode	Manchester mode NRZ mode pre-emphasis enabled for symbol rates higher than 40 Kbits	18,7	DR_{TX_TM_MAN}	—	—	80	Kbit/s	B
11.70	TX transparent data rate in Manchester and NRZ mode		18,7	DR_{TX_TM_NRZ}	—	—	160	Ksym/s	B
11.80	TX buffered data rate in Manchester and NRZ mode	Manchester mode	—	DR_{TX_BUF_MAN}	—	—	80	Kbit/s	B
11.80	TX buffered data rate in Manchester and NRZ mode	NRZ mode	—	DR_{TX_BUF_NRZ}	—	—	120	Ksym/s	B
11.90	TX buffered data rate programming step in Manchester and NRZ mode	AVR running with f_XTO/4	7	ΔDR_BUF	—	—	1	%	D
Antenna Tuning and SPDT in TXMode
12.00	Antenna tuning capacitor range	FEAT.ANTN[3:0] = 0-15	5	C_{TUNE_RANGE}	4	—	9	pF	B
12.10	Antenna tuning capacitor resolution	4 bits controlled with RF front-end register FEAT.ANT[3:0] available	5	C_{TUNE_RES}	—	0.16	0.2	pF	C
12.20	Antenna tuning series resistance	The series resistance influences the quality factor of the loop antenna and causes radiated TX power losses	5	C_{TUNE_SRESIST}	—	2.5	4	W	C
12.30	Antenna tuning maximum RF amplitude	If higher levels occur in application an external capacitor to GND is needed to reduce the amplitude.	5	C_{TUNE_RFAMP_MAX}	—	—	3	V_p	D
12.40	SPDT insertion loss TX	Transmitted power using matching RF_OUT with SPDT to 50W compared to matching RF_OUT directly to 50W	(4,6)	IL_{Switch_TX}	—	—	—	—	—
		Low-band				0.5	1.1	dB	C
		High-band				0.7	1.2	dB	C
12.45	Maximum peak voltage on SPDT_ANT (pin4)	—	4	V_{PEAK_SPDT_ANT}	-0.3	—	VS+ 0.3	V	D
12.50	Maximum peak voltage on SPDT_TX (pin6)	—	6	V_{PEAK_SPDT_TX}	-0.3	—	VS+ 0.3	V	D

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