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Micro-ERF Series

Specifications:

Frequency Coverage:	30 to 512 MHz
Input/Output Impedance:	50 Ω
Inband Input/Output VSWR:	1.5: 1 typical, 2.2: 1 max
Ultimate Attenuation:	55 dB typical
Insertion Loss:	4 dB ± 1 dB typical
Percent Bandwidth:	5% ± 1
Shape Factor (30 dB/3 dB):	6 ± 0.5 typical, 8 max
Inband RF Power Handling:	1 milliwatt (input)
Out of Band RF Power Handling:	50 milliwatt (input)
Inband Third Order Intercept Point:	+10 dBm (input)
Tuning Control:	Parallel or Serial
Tuning Speed:	25 µsec typical, 35 µsec max
DC Power	+5 VDC (2.3 mA to 3.2 mA) 25 mA peak +1.65 to +5.5VDC 18uA max; +20VDC (4 mA max)
Operating Temperature Range:	-40 to +85°C
Size (in. / mm.)	.25 x 1.7 x 1.9 / 6.4 x 42 x 47
Weight:	0.6 oz. / 17 g.

The Micro-ERF^®Extended Range Series of tunable filters was developed to address applications needing a small, surface mount package with wide tunability. This tunability is accomplished by the use of three internal tunable filters along with GaAs RF band select switches all in one housing. The tunable filters are varactor based in order to minimize size and power consumption. Parallel or serial digital interface can be selected by a mode pin for ease of integration into your design.

Micro-ERF Evaluation Board

INTERFACE AND CONTROL OPTIONS:

General Information:
The Micro-ERF^® requires two supply voltages. A +5 VDC logic supply and a high bias voltage of +20 VDC is required to bias the varactor diodes. Theses supply voltage should be adequately filtered as noise present on these pins will influence the RF signal purity.

Digital Interface Information:
The digital interface format can be either SPI serial or parallel depending on the state of the mode control pin. All data input pins are universal data bus capable of 1.8-V, 2.5-V, 3.3-V, and 5-V voltage nodes and selected by the V_CCDsupply.

Performance:

The following plots illustrate approximate performance.

Mechanical Details:

Pinout and Ratings:

Pads Layout Bottom

Pin #	REF DES	DESCRIPTION	MAXIMUM RATING
1	Ser/Par	Serial/Parallel Mode Control	V_CCD+ 0.5VDC
2	TR	Tune Ready Output	V_CCD+ 0.5VDC
3	V_CCD	Digital Interface Supply	-0.5 to +6.5v
4	A7/ SPICLK	Tune Bit 7(MSB)/ SPI Clock	V_CCD+ 0.5VDC
5	A6	Tune Bit 6
6	A5/ MOSI	Tune Bit 5/ SPI Data Input
7	A4/ CS_LD	Tune Bit 4/SPI Chip Select
8	A3	Tune Bit 3
9	A2	Tune Bit 2
10	A1	Tune Bit 1
11	A0	Tune Bit 0 (LSB)
12	STB	Strobe
13	V_CCA	+5 VDC	-0.5 to +5.5v
14	GND	Ground
15	Vbb	High Bias (+20 VDC)	+30 vdc
16	GND	Ground
17	RF	RF In/Out	+10 dBm, +17 dBm¹
18	GND	Ground
19-20	GND	Ground
21	GND	Ground
22	RF	RF In/Out	+10 dBm, +17 dBm¹
23	GND	Ground	+10 dBm, +17 dBm¹

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.

All Products > Bandpass Filters > Extended Range Filters

Micro-ERF Series

Specifications:

Micro-ERF Evaluation Board

INTERFACE AND CONTROL OPTIONS:

Performance:

Mechanical Details:

Pinout and Ratings:

Pin #

REF DES

DESCRIPTION

MAXIMUM RATING