Extended Range Filter™

Specifications:

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

 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:

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