ERF-5W™ Series (Single & Dual)

The new ERF-5W™ filter takes Pole/Zero’s MINI-ERF® technology to a higher level of RF power handling, with 5W (average) in-band power handling, and covering the entire military tactical radio tuning range of 30-520 MHz in one integrated package. This tunability is accomplished by the use of three poles of selectivity, multiple internal tunable filters along with high performance PIN diode RF band select switches. The tunable filters are designed to minimize size and power consumption, while maintaining high RF power handling and linearity characteristics. Serial control is accomplished via a standard Serial Peripheral Interface (SPI)-based bus.

Specifications

Frequency Coverage (12 bands):	30 MHz to 520 MHz
Input/Output Impedance:	50 Ω
Inband Input/Output VSWR:	1.65:1 max
Insertion Loss:	2.5dB +/- 1 dB typ
Percent Bandwidth:	10% typ
Selectivity @ Fe +/- 20%:	35dB typical
Inband RF Power Handling:	5 watts (input) avg
Out of Band RF Power Handling:	Up to 10 watts (input)
Inband Third Order Intercept Point:	+47 dBm (input)
Tuning Control:	Parallel or Serial
Tuning Speed:	25 μsec typical, 50 μsec max
DC Power: =	+5 VDC @ 1.5A max
Operating Temperature Range: =	-40 to +85°C

Note 1:

Out of band RF power handling refers to signals thatare at least twenty percent (20%) removed from the tuned center frequency andis frequency dependent: 5W signals applied between 30 and 75 MHz, 8W from 75 to 175 MHz, and 10 W from 175 to 520 MHz

The following plot(s) illustrate approximate performance:

General Information
The 5W-ERF requires a single +5vdc analog supply and a +1.65 to +5.5vdc digital supply. These supply voltages should be adequately filtered as noise present on these pins will influence the RF signal purity.

Notes: 1. First number indicates maximum inband power levels and second number indicates maximum out of band RF power levels either in CW or composite peak for multi-tones.

Digital Interface Information

With the “PAR/NSER” input low, the unit is in serial control mode. When it is high, the filter is in parallel control mode. Maximum input data rate is 7Mhz. In either mode, 2 bytes of data are required. One selects the internal frequency band and the other selects the tuneword (251 tune frequencies within each band). All data input pins are CMOS/TTL compliant. Logic high/low levels are as follows:

Symbol	Parameter	VCCD	Minimum	Maximum	Unit
VIH	High-level input voltage	1.65Vto 1.95V	VCCD x 0.65	VCCD	V
		2.3 V to 2.7 V	1.7
		3 V to 3.6 V	2
		4.5 V to 5.5 V	VCCD x 0.7
VIL	Low-level input voltage	1.65 V to 1.95 V		VCCD x 0.35	V
		2.3 V to 2.7 V		0.7
		3 V to 3.6 V		0.8
		4.5 V to 5.5 V		VCCI x 0.3

PIN#	REF DES	Description	Max Ratings
1-6	NC		———————–
7	GND	Ground
8	NC
9	GND	Ground
10	SEL_BAND_1	Band Select Pin (MSb)	VCCD – 0.2VDC
11			———————–
12	GND	Ground	———————–
13	A7/Serial Clock IN	Tune Bit 7/ Serial Clock IN	VCCD – 0.2VDC
14	A5/MOSI	Tune Bit 5/ Serial Data IN
15	A3	Tune Bit 3
16	A1	Tune Bit 1
17	Tune Ready Output	Tune Ready Output
18	VCCD	Digital Interface Supply	1.6 to 5.5 VDC interface voltage (0.1 MA MAX). For 3.3V Interface use 3.3VDC
19	VCCA	+5VDC	+5.5V (1.5A max.)
20-23	NC		—————–
24-25	GND	Ground
26	NC		—————–
27	GND	Ground	—————–
28	SEL_BAND_0	Band Select Pin (LSb)	VCCD – 0.2VDC
29	NC		—————–
30	STBn	nStrobe	VCCD – 0.2VDC
31	A6	Tune Bit 6
32	A4/CS_LD	Tune Bit 4/SPI Chip Select/Load Data
33	A2	Tune Bit 2
34	A0	Tune Bit 0 (LSB)
35	PAR/NSER	Parallel/Serial Mode Control
36	VCCD	Digital Interface Supply	See PIN 18 Comments
37	VCCA	+5 VDC	+5.5 VDC (1.5A max.)

Contact Sales

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Feel free to call upon our sales team (513) 870-9060 at any time. They are here to assist you and are happy to do so.