Silicon Laboratories SI4734/35-B20 manual Si4734/35-B20, Parameter, Symbol, Test Condition, Unit

Si4734/35-B20

Table 10. 64–75.9 MHz Input Frequency FM Receiver Characteristics1 (VDD = 2.7 to 5.5 V, VIO = 1.5 to 3.6 V, TA = –20 to 85 °C)

Parameter	Symbol	Test Condition	Min	Typ	Max	Unit
Input Frequency	fRF		64	—	75.9	MHz
Sensitivity with Headphone		(S+N)/N = 26 dB	—	4.0	—	µV EMF
Network2,3,4,5
LNA Input Resistance5,6			3	4	5	kΩ
LNA Input Capacitance5,6			4	5	6	pF
Input IP35,7			100	105	—	dBµV EMF
AM Suppression2,3,5,6		m = 0.3	40	50	—	dB
Adjacent Channel Selectivity5		±200 kHz	—	50	—	dB
Alternate Channel Selectivity5		±400 kHz	—	70	—	dB
Audio Output Voltage2,3,5,6			72	80	90	mVRMS
Audio Output L/R Imbalance2,6,8			—	—	1	dB
Audio Frequency Response Low5		–3 dB	—	—	30	Hz
Audio Frequency Response High5		–3 dB	15	—	—	kHz
Audio Mono S/N2,3,4,5,6,9			55	63	—	dB
Audio THD2,5,6,8			—	0.1	0.5	%
De-emphasis Time Constant		FM_DEEMPHASIS = 2	70	75	80	µs
		FM_DEEMPHASIS = 1	45	50	54	µs
Audio Common Mode Voltage9			0.7	0.8	0.9	V
Audio Output Load Resistance5,9	RL	Single-ended	10	—	—	kΩ
Audio Output Load Capacitance5,9	CL	Single-ended	—	—	50	pF
Seek/Tune Time5		RCLK tolerance	—	—	80	ms/channel
		= 100 ppm
Powerup Time		From powerdown	—	—	110	ms
RSSI Offset10		Input levels of 8 and	–3	—	3	dB
		60 dBµV EMF
Notes:

1.To ensure proper operation and receiver performance, follow the guidelines in “AN383: Antenna Selection and Universal Layout Guidelines.” Silicon Laboratories will evaluate schematics and layouts for qualified customers. Tested at

RF = 98.1 MHz.

2.FMOD = 1 kHz, 75 µs de-emphasis, MONO = enabled, and L = R unless noted otherwise.

3.Δf = 22.5 kHz.

4.BAF = 300 Hz to 15 kHz, A-weighted.

5.Guaranteed by characterization.

6.VEMF = 1 mV.

7.f2 – f1 > 2 MHz, f0 = 2 x f1 – f2. AGC is disabled. Refer to "6. Pin Descriptions: Si4734/35-GM" on page 30.

8.Δf = 75 kHz.

9.At LOUT and ROUT pins.

10.At temperature 25 °C.

14 Rev. 1.0