Component Specifications#

Saw Filter#


EFR32ZG23	ZGM230S
Applicable	Applicable

Silicon Labs recommends using a SAW filter in Z-Wave 800 gateway designs also containing GSM or LTE transceivers operating in the sub-GHz band. A SAW filter attenuates unwanted radio emissions and improves the receiver blocking performance. Three regions are defined to cover the global Z-Wave frequency range. The SAW filter specifications described in the following tables are recommended for new designs. An overview of supported Z-Wave regions and frequencies can be found in [1].

Find a guideline on when to use a SAW filter in [13].

Region E


	Frequency Range	Unit	Minimum	Typical	Maximum
Operating temperature	—	◦C	-30	—	+85
Insertion loss	865.0 to 870.1 MHz	dB	—	—	3.5
Amplitude ripple	865.0 to 870.1 MHz	dB	—	—	2.0
Relative attenuation	0.1 to 800.0 MHz	dB	40	—	—
	805 to 830 MHz	dB	35	—	—
	835 to 855 MHz	dB	—	—	—
	860 to 862 MHz	dB	—	—	—
	890 to 1000 MHz	dB	40	—	—
	1005 to 2000 MHz	dB	30	—	—
	2005 to 3000 MHz	dB	30	—	—
	3005 to 4000 MHz	dB	30	—	—
	4005 to 6000 MHz	dB	—	—	—
In / out impedance	—		—	50	—

Region U


	Frequency Range	Unit	Minimum	Typical	Maximum
Operating temperature	—	◦C	-30	—	+85
Insertion loss	908.2 to 916.3 MHz	dB	—	—	2.5
Amplitude ripple	908.2 to 916.3 MHz	dB	—	—	1.5
Relative attenuation	720 to 800 MHz	dB	45	—	—
	805 to 840 MHz	dB	—	—	—
	845 to 870 MHz	dB	40	—	—
	870 to 895 MHz	dB	—	—	—
	940 to 1000 MHz	dB	9	—	—
	1005 to 2000 MHz	dB	9	—	—
	2005 to 3000 MHz	dB	17	—	—
	3005 to 4000 MHz	dB	—	—	—
	4005 to 6000 MHz	dB	—	—	—
In / out impedance	—		—	50	—

Region H


	Frequency Range	Unit	Minimum	Typical	Maximum
Operating temperature	—	◦C	-30	—	+85
Insertion loss	919.5 to 926.5 MHz	dB	—	—	3.2
Amplitude ripple	919.5 to 926.5 MHz	dB	—	—	1.0
Relative attenuation	40 to 870 MHz	dB	40	—	—
	875 to 885 MHz	dB	35	—	—
	890 to 905 MHz	dB	20	—	—
	945 to 955 MHz	dB	20	—	—
	960 to 1000 MHz	dB	20	—	—
	1005 to 1500 MHz	dB	40	—	—
	1505 to 3000 MHz	dB	20	—	—
	3005 to 4000 MHz	dB	—	—	—
	4005 to 6000 MHz	dB	—	—	—
In / out impedance	—		—	50	—

Recommended Components for GSM/LTE Gateways#

SAW Filters


Region	Distributor	Component Number	Note
E	ACTE A/S, www.acte.dk, salessupport@acte.dk	SF4000-868-07-SX	Preferred
U	ACTE A/S, www.acte.dk, salessupport@acte.dk	SF4000-914-06-SX	Preferred
H	ACTE A/S, www.acte.dk, salessupport@acte.dk	SF1256-923-02	Preferred

Optional Components for GSM/LTE Gateways#

LTE Improved SAW Filters


Region	Distributor	Component Number	Note
E	ACTE A/S, www.acte.dk, salessupport@acte.dk	SF4000-869-14-SX	Improved LTE rejection

Crystal#


EFR32ZG23	ZGM230S
Applicable	N/A

The crystal is part of the oscillator that generates the reference frequency for the digital system clock and RF carrier. It is a critical component of a Z-Wave 800 device. Further, it is mandatory to calibrate the crystal for EFR32ZG23-based designs. Refer to section Calibration for more information.

The EFR32ZG23 has internal crystal capacitors and does not need any external circuitry apart from the crystal itself. The ZGM230S has an integrated crystal and is calibrated at the time of production.

For more information about the crystal oscillator, crystals, and the EFR32ZG23 device, refer to [7].

Crystal Specification for Z-Wave 800 Devices


Parameter	Symbol	Min	Typ	Max	Unit
Crystal frequency	fHFXO	—	39	—	MHz
Supported crystal equivalent series resistance (ESR)	ESRHFXO_39M	—	40	60	Ω
Supported range of crystal load capacitance	CHFXO_CL	—	10	—	pF
Combined tolerance for the crystal	FTtotalHFXO	-27	—	27	ppm/5yr

Recommended Components#

Refer to Mandatory Crystal Adjustment for EFR32ZG14/EFR32ZG23 Based Products User's Guide for the crystal recommendations and other important aspects of the crystal selection.