MAXI-POLE® Series
The MAXI-POLE® Series of tunable filters provides improved passband performance (reduced insertion loss for a given bandwidth) in a slightly larger package. The product line includes several standard designs in various frequencies to support almost any application. Approximate performance is summarized in the Maxi-Pole Series Selection Guide.
Specifications
| Frequency Coverage (8 bands): | 1.5 MHz to 1 GHz |
| Input/Output Impedance: | 50 Ω |
| Inband RF Power Handling: | 1 Watt (input) |
| Inband Third Order Intercept Point: | +40 dBm (input) |
| Inband Second Order Intercept Point: | +100 dBm (input) |
| Tuning Control: | 8 bit parallel |
| Tuning Speed: | 10 µ S (f0 > 30 MHz) |
| DC Power: | +5 VDC @ 10 to 500 mA +100 VDC @ 1mA |
|
Operating Temperature Range:
|
-40 to + 85°C
|
|
Center Frequency Drift:
|
80 PPM/°C
|
- Performance
- Selection Guide
- Numbering Table
- Interface and Control Notes
- Package Outline
- Pinout and Ratings
The following plots illustrate approximate performance (not representative of all frequency ranges)
The following plots illustrate approximate insertion loss and bandwidth trends across a given frequency band, and the differences between various bands:
MAXI-10-30-5
MAXI-30-90-2
MAXI-90-200-4
MAXI-400-700-5
The Selection Guide illustrates approximate performance; table values are shown as average/maximum.
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Frequency Range
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Suffix
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Insertion Loss
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% Bandwidth (3dB)
|
Shape Factor (30 dB / 3 dB)
|
Ultimate (2 x fo) |
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| Overall | Low Side | High Side | |||||
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1.5 to 4
MHz
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-1
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-2
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1.8/2.3
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5.3/5.5
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5.8/6.1
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6.8/7.3
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4.8/4.9
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-3
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-4
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-5
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4 to 10
MHz
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-1
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-2
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1.8/2.3
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5.3/5.5
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6.0/6.2
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7.0/7.2
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5.0/5.1
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-3
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2.2/3.5
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3.4/3.8
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5.9/6.2
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7.1/7.6
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4.8/5.0
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-4
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-5
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3.8/6.3
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1.9/2.2
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6.1/6.2
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6.9/7.0
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5.3/5.4
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10 to 30
MHz
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-1
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-2
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1.4/2.3
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5.1/5.5
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6.1/6.3
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7.0/7.4
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5.1/5.2
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-3
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2.0/3.5
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3.6/3.8
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6.1/6.5
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7.3/8.0
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4.9/5.2
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-4
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3.5/4.5
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2.4/2.8
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5.9/6.0
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6.6/6.7
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5.2/5.4
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-5
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4.3/6.3
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2.0/2.2
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5.8/6.1
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6.6/7.2
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5.0/6.1
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30 to 90
MHz
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-1
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|||||
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-2
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1.6/3.0
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4.8/5.5
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6.7/7.7
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9.2/11.3
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4.2/4.6
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-3
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2.4/3.5
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3.5/3.9
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5.9/6.3
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6.6/7.6
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5.2/6.0
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-4
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3.5/4.5
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2.6/2.8
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5.8/5.9
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6.8/7.1
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4.8/4.9
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-5
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4.3/5.8
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2.0/2.2
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5.5/6.3
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6.3/7.3
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4.7/5.3
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90 to 200
MHz
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-1
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-2
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1.7/2.3
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5.3/5.5
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5.9/6.1
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6.9/7.4
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4.9/5.1
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-3
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2.7/3.5
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3.5/3.9
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5.8/6.0
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6.7/7.2
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4.9/5.1
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-4
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3.3/5.3
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2.5/2.7
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5.8/6.1
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6.7/7.0
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5.0/5.2
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-5
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4.3/6.3
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1.9/2.2
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5.8/6.3
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6.4/7.0
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5.1/5.6
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200 to 400
MHz
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-1
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0.9/1.2
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9.9/10.9
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5.9/6.3
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7.2/7.9
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4.6/5.0
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-2
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1.4/2.3
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4.8/5.5
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5.9/6.5
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7.3/8.1
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4.6/5.0
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-3
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2.0/3.3
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3.4/3.9
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5.9/6.3
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6.9/7.5
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4.9/5.1
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-4
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3.1/4.5
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2.4/2.8
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5.8/6.3
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6.6/7.4
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5.0/5.3
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-5
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4.2/6.3
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1.9/2.2
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5.7/6.3
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6.5/7.1
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5.0/5.5
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225 to 400
MHz
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-1
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0.7/1.2
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10.0/10.9
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-2
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1.2/2.3
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4.8/5.3
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-3
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1.8/3.3
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3.4/3.9
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6.4/6.6
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8.4/9.1
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4.4/4.6
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-4
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3.1/4.5
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2.4/2.8
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6.2/6.7
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7.6/9.0
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4.7/5.1
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-5
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4.4/6.3
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2.0/2.2
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5.8/6.0
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6.5/6.9
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5.0/5.2
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225 to 450
MHz
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-1
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-2
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-3
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2.4/3.5
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3.6/3.9
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-4
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-5
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225 to 512
MHz
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-1
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-2
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-3
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2.4/3.5
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3.3/3.9
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-4
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-5
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400 to 700
MHz
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-1
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0.8/1.4
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9.6/10.5
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6.2/6.3
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7.7/8.0
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4.7/4.9
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-2
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1.4/2.3
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4.8/5.5
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-3
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2.3/3.6
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3.4/3.9
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5.8/6.3
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6.8/7.5
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4.8/5.1
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-4
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3.2./4.6
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2.5/2.9
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6.0/6.1
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6.8/7.0
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5.1/5.2
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-5
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4.3/6.3
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1.9/2.2
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5.8/6.1
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6.4/6.8
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5.2/5.6
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700 to 1000
MHz
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-1
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-2
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1.6/2.3
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5.0/5.5
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5.6/5.8
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5.9/6.1
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5.4/5.9
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-3
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-4
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| Series | Frequency(MHz) | Insertion Loss | Connector Type | Options | ||||
| MAXI | – | 30-90 | – | 2 | – | SMA | – | AF |
| 1.5-4 | 1 | SMA (Female) | A | |||||
| 4-10 | 2 | B | ||||||
| 10-30 | 3 | C | ||||||
| 30-90 | 4 | F | ||||||
| 90-200 | 5 | |||||||
| 200-400 | ||||||||
| 225-400 | ||||||||
| 400-700 | ||||||||
| 700-1000 |
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
NOTES:
1) Options may be limited to particular frequency bands and/or configurations.
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. There are 250 equally spaced tuning increments across each standard filter band, resulting in 251 tune words from 00000000 to 11111010. the last 5 tune words are reserved for housekeeping functions. 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 in 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 and Control 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 |
| VIL | Input Low Voltage | Control Signals except A0 – A7 | 0.0 | 0.2 Vcc | V |
| VIH | Input High Voltage | Control Signals except A0 – A7 | 0.7 Vcc | Vcc | V |
| VIL1 | Input Low Voltage | A0 – A7 | 0.0 | 0.15Vcc | V |
| VIH1 | Input High Voltage | A0 – A7 | 0.7 Vcc | Vcc | V |
Switching Characteristics
Vcc = +5VDC, ± 10%; T= -40 to +85°C
|
Symbol |
Parameter |
Min |
Max |
Units |
|
tS |
Setup Time, A0-A7 to STB |
200 |
|
nS |
|
tH |
Hold Time, A0-A7 from STB |
6 |
|
µS |
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tSH |
STB High Time |
25 |
|
µS |
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tW |
STB Pulse Width |
20 |
|
nS |
|
tDW |
Strobe D well Time (From STB Falling edge to next STB Falling edge) |
500 |
|
nS |
|
tACC |
Access time from STB to f0 |
15 |
nS |
Strobe
The filter is tuned within 15 µS to the frequency designated by the tuneword existing on the eight control bit lines when the line 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. Consult Selection Guide for the maximum strobe rate in each frequency band.
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 stopband 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.