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All Products > Bandpass Filters > Extended Range Filters

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Extended Range Filter™

Specifications:

Product Number:	MINI-ERF-30-512-5
Frequency Coverage:	30MHz to 512MHz
3dB Bandwidth:	5% (typ)
Insertion Loss:	4dB (typ)
Input/Output Impedance:	50 Ω
Inband RF Power Handling:	250 milliwatts (input)
Inband Third Order Intercept Point:	>30dBm (input)
Inband Second Order Intercept Point:	+60dBm (input)
Tuning Control:	3-wire Serial Peripheral Interface (SPI)
Tuning Speed:	<100µS
DC Power:	+5VDC @ < 450mA
Operating Temperature Range:	-40 to + 70°C
Center Frequency Drift:	80 PPM/°C

The Extended Range Filter is a multi-band bandpass filter designed for integration in JTRS transceivers where small size, moderate selectivity and low power consumption are paramount. It provides digitally tunable bandpass filtering from 30 to 512MHz.

Performance:

The following plots illustrate approximate performance (not representative of all frequency ranges):

Interface and Control Notes:

Interface Options

The filter comes standard with a 3-wire Serial Peripheral Interface (SPI).

DC Control Interface Characteristics

Switching characteristics

Vcc = +5VDC, ± 10%; T= -40 to +70°C

Parameter	Min	Max	Units
Setup Time, SDI to SCK rising edge	10		ns
Hold Time, SCK rising edge to SDI	10		ns
Setup Time, CS/LD falling edge to SCK rising edg	2.5		µs
Tune Time, SCK falling edge to New Frequency		25	µs
Serial Clock Frequency, SCK rising edge to next SCK rising edge		2	MHz

NOTES:
   (1) 2MHz (maximum) clock
   (2) 50% duty cycle
   (3) Pin can be held low longer to delay the output of filter tuning data
   (4) Digital tune time + analog/RF switching speed

Chip Select/Load
The filter is tuned to the frequency designated by the tuneword sent on the Serial Data In (SDI) control line, which is clocked in by the Serial Clock (SCK) line most significant bit (MSB) first while the Chip Select/Load () line is held low. After the tuneword is sent, the filter is tuned by returning the Chip Select/Load line high. Maximum clock rate for SCK is 2 MHz and tune time is <25µS.

RF Power Handling Capability
The filters are designed to operate with RF input power levels up to 250 milliwatts inband. Signals in the filter stopband up to 5 Watts at the input will not cause damage to the filter.

Temperature Effects
Over the –40 to +70°C temperature range, filters will exhibit a temperature drift of less than 80 PPM/°C, or a total of less than ±0.5% of the center frequency.

Package Outline:

BOTTOM SIDE VIEW
Note: Area this filter mounts to needs to be clear of components.

Pinout and Ratings:

PIN#	REF DS	Description	Max Ratings
1	----	No Connect
2	GND	Ground
3	RF _IN	RF Input	+27 dBm
4	RF _GND	Ground
5		No Connect
6	SDI	Serial Data In	5.5VDC
7	----	Reserved
8	SCK	Serial Clock	5.5VDC
9	----	Reserved
10	----	Reserved
11	CS/LD	Serial Data Strobe	5.5VDC
12	----	Reserved
13	----	No Connect
14	----	No Connect
15	----	No Connect
16	----	No Connect
17	GND	Ground
18	----	No Connect
19	RF _GND	Ground
20	RF _OUT	RF Output	+27 dBm
21	GND	Ground
22	V_CC	+5 VDC, 10%	5.5VDC

Data is believed to be accurate. All data is subject to change without notice.