Maxi-Pole Notch Series

MAXI-POLE® Notch Filters offer all of the same performance features as the MINI-POLE® Notch filters, with the advantage of an improved notch shape factor.

Specifications

Frequency Coverage (5 bands):	1.5 MHz to 400 MHz
Input/Output Impedance:	50 Ω
Inband RF Power Handling:	1 Watt (input)
Passband Third Order Intercept Point:	+50 dBm (input,f₀ > 30 MHz)
Passband Insertion Loss:	1 dB (max)
Passband VSWR:	2:1 (max)
Tuning Control:	8 bit parallel
Tuning Speed:	10 µ S (f₀ > 30 MHz, +10 dBm reference)
DC Power:	+5 VDC @ 10 to 500 mA +100 VDC @ 1mA
Operating Temperature Range:	-40 to + 85°C
Center Frequency Drift:	80 PPM/°C

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

Series				Frequency (MHz)		Notch Depth (dB)		Options
MAXI	—	NOTCH	—	10 – 30	—	20	—

				1.5 – 4				A
				4 – 10				B
				10 – 30				C
				30 – 90				F
				90 – 200
				200 – 400
				225 – 400

Available Options:

A. Internal DC-DC Converter (Eliminates need for high voltage supply. Requires additional 250 mA of 5 VDC current)
B. Serial Interface
C. Custom Frequency Bands (Specify START and STOP frequencies in MHz)
F. Filtered D-Connector

NOTE(S):

1) Options may be limited to particular frequency. Consult factory for your application.
2) Filters are aligned and tested using a High Bias of +100 VDC unless otherwise specified by the customer.

Frequency Tuning Address

Maxi-Pole Series filters utilize an eight-bit scheme for tune words to digitally control tuning of the center frequency. For further information on how to calculate tune words, please see the Frequency Tuning Address Application Note.

Bias Voltage Requirement

A bias voltage is required to reverse bias the PIN diodes used to tune the filter. Very little static current (less than 1 mA) is needed. A minimum of 30 Volts is recommended for proper filter operation, although is some instances voltages as low as 12 Volts will provide acceptable performance. As this voltage is increased, the power handling capability and intermodulation are improved as shown below. A bias voltage of +100 VDC is recommended for best results, and all filters are tuned and aligned this way from the factory unless otherwise specified by the customer. An internal low EMI supply, powered from the +5 VDC input, is available as an option.

Interface Options

The filter comes standard with an 8-bit parallel interface, although a serial interface can be specified as an option.

DC Control Interface Characteristics

Symbol	Parameter	Condition	Min	Max	Units
V_IL	Input Low Voltage	Control Signals except A0 – A7	0.0	0.2 Vcc	V
V_IH	Input High Voltage	Control Signals except A0 – A7	0.7Vcc	Vcc	V
_VIL1	Input Low Voltage	A0 – A7	0.0	0.15Vcc	V
_VIH1	Input High Voltage	A0 – A7	0.7Vcc	Vcc	V

Switching Characteristics

Vcc = +5VDC, ± 10%; T= -40 to +85°C

Symbol	Parameter	Min	Max	Units
t_S	Setup Time, A0-A7 to STB	200		n_S
t_H	Hold Time, A0-A7 from STB	6		µ_S
t_SH	STB High Time	25		µ_S
t_W	STB Pulse Width	20		n_S
t_DW	Strobe D well Time (From STB Falling edge to next STB Falling edge)	500		n_S
t_ACC	Access time from STB to f0		15	n_S

Strobe

The filter is tuned within 15 µS to the frequency designated by the tuneword existing on the eight control bit lines when theline is brought low. Once strobed, data existing on the tune control lines is ignored until strobed again. Maximum strobe rate for frequencies above 10 MHz is 2 kHz, and below 10 MHz is typically 1 kHz.

RF Power Handling Capability

The filters are designed to operate with RF input power levels up to 1 Watt (+30 dBm) inband (see curves above under Bias Voltage Requirement). Signals in the filter passband up to 5 Watts at the input will not cause damage to the filter.

Temperature Effects

Over the –40 to +85°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.

Parallel Interface

PIN#	REF DES	Description	Max Ratings
1	A2	Tune Bit 2	+6 VDC
2	A3	Tune Bit 3
3	A4	Tune Bit 4
4	A5	Tune Bit 5
5	A6	Tune Bit 6
6	A7	Tune Bit 7 (MSB)
7	GND	Ground
8	Vcc	+5 VCD, +-10%	+6 VDC
9	GND	Ground
10	Vbb	High Bias	+125 VDC
11	GND	Ground
12	GND	Ground
13	STB	Strobe	+6 VDC
14	A0	Tune Bit 0 (LSB)
15	A1	Tune Bit 1

Serial Interface

PIN#	REF DES	Description	Max Ratings
1	DO	Serial Data Out	+6 VDC
2	–	No Connect
3	–	No Connect
4	–	No Connect
5	–	No Connect
6	–	No Connect
7	GND	Ground
8	Vcc	+5 VCD, +-10%	+6 VDC
9	GND	Ground
10	Vbb	High Bias	+125 VDC
11	GND	Ground
12	GND	Ground
13	STB	Strobe	+6 VDC
14	SER CLK	Serial Clock
15	D1	Serial Data In

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

Contact Sales

The Pole/Zero Sales and Marketing team is a highly qualified group of engineers who can relate to your design problems and provide expert assistance. They make sure you get the right components at the right time and price.

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.