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Pole/Zero and Delcross Technologies Partner for First Time Success in Fielding Radio Communications Systems.
08/04/2011
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All Products > Bandpass Filters > Micro-Pole Series
Micro-Pole Series
Specifications:
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Frequency Coverage (8 bands):
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10 MHz to 1 GHz
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Input/Output Impedance:
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50 Ω
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Inband RF Power Handling: |
1 milliwatt (input)
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Inband Third Order Intercept Point:
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+10 dBm (input)
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Inband Second Order Intercept Point:
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+70 dBm (input)
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Tuning Control:
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8 bit parallel or 3-wire Serial |
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Tuning Speed:
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450 µS (typical) |
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DC Power:
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+3 to +5 VDC |
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Operating Temperature Range: |
-40 to + 85°C
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| Size (in/mm): | .5 x 1.0 x 1.5 / 12.7 x 25.4 x 38.1 |
| Weight (ounces/grams): | .05 oz/14.2 g |
The MICRO-POLE® Series of tunable filters was developed to address applications needing a small, surface mount package. This tunable filter is varactor-based in order to minimize size and power consumption. The varactor design also supports requirements up to 2 GHz (custom designs have been completed). Our standard digital interface is included for ease of integration into your design and can support either serial or parallel requirements. The product line includes several standard designs in various bands to support almost any application. Approximate performance is summarized in the Micro-Pole Series Selection Guide.
Performance:
The following plots illustrate approximate performance (not representative of all frequency ranges):
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_300.gif)
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_300.gif)
The following plots illustrate approximate insertion loss and bandwidth trends across a given frequency band, and the differences between various bands:
MICRO-30-90-5
_300.gif)
_300.gif)
MICRO-90-200-3
_300.gif)
_300.gif)
MICRO-200-400-3
_300.gif)
_300.gif)
MICRO-700-1000-5
_300.gif)
_300.gif)
Micro-Pole Series Selection Guide:
This Selection Guide illustrates approximate performance for the MICRO-POLE Series: Table values are shown as average/maximum.
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Shape Factor |
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Frequency
Range |
Suffix
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Insertion
Loss |
%
Bandwidth (3dB) |
Power
Handling |
Overall |
Low |
High |
Ultimate |
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10 to 30
MHz
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-1
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-2
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1.8/2.7
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8.0/8.7
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6.2/6.8
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6.9/8.0
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5.6/5.9
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-3
|
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||||||
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-4
|
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|
|
|
|
|
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-5
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3.5.7.0
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3.2/3.5
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5.8/5.9
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6.1/6.3
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5.6/5.7
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30 to 90
MHz
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-1
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0.8/1.2
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20.1/21.6
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6.1/7.0
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7.5/9.4
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4.7/5.3
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-2
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2.0/2.6
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8.1/8.7
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+5 dBm
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6.0/6.2
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6.7/7.2
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5.2/5.7
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59 dB
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-3
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3.0/4.0
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5.5/6.0
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5.9/6.3
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6.4/6.9
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5.4/5.8
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-4
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4.0/5.2
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4.2/4.5
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5.8/6.2
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6.2/6.6
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5.4/5.8
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-5
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5.4/7.0
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3.3/3.5
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6.0/6.6
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6.3/6.6
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5.8/6.5
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90 to 200
MHz
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-1
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0.8/1.5
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20.1/21.1
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5.9/6.3
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6.7/7.7
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5.0/5.1
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-2
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-3
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2.5/4.1
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5.5/6.0
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5.9/6.3
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7.0/7.9
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4.9/5.3
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-4
|
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|
|
|
|
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-5
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4.7/7.0
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3.3/3.5
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6.0/6.9
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7.2/9.1
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4.9/5.4
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200 to 400
MHz
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-1
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0.8/1.5
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20.1/22.0
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5.8/5.9
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7.0/7.6
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4.5/4.8
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-2
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-3
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2.5/4.1
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5.5/6.0
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0 dBm
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5.8/6.6
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6.5/7.2
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5.2/6.1
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||
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-4
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4.1/5.1
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4.0/4.5
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6.1/7.4
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6.6/7.6
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5.6/7.3
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-5
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4.7/7.0
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3.3/3.5
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5.9/6.7
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6.3/7.2
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5.6/6.3
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225 to 400
MHz
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-1
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-2
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1.8/2.3
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8.0/8.4
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-3
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2.5/3.8
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5.0/56.0
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-4
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4.1/5.1
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4.0/4.5
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5.9/7.0
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6.3/7.4
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5.5/6.8
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-5
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4.7/7.0
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3.0/3.5
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5.9/6.7
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6.3/7.2
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5.6/6.3
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400 to 700
MHz
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-1
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-2
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2.1/2.7
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8.0/9.0
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6.5/6.9
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8.5/9.0
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4.4/4.8
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-3
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3.1/4.1
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5.4/6.0
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5.9/6.9
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7.0/8.3
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4.8/5.5
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-4
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-5
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4.7/7.0
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3.3/3.5
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700 to 1000
MHz
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-1
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-2
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2.0/3.3
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8.0/9.2
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6.1/6.4
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7.4/8.0
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4.8/5.2
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-3
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|||||||
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-4
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||||||
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-5
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4.7/7.0
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3.0/3.5
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6.4/7.5
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6.9/8.4
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5.9/6.9
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Product Numbering Table:
Available Options:
NOTES: Options may be limited to particular frequency bands and/or performance levels. Consult factory for your application.
Interface and Control Notes:
Frequency Tuning Address
Micro-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.
Interface Options
The Micro-Pole is supplied standard with two different user selectable interfaces. The available interface choices are either an 8 bit parallel data input, or a serial three wire interface data input. Interface selection is made at power-up and is controlled by the state of the PAR/SER# input (pin 12).
DC Control Interface Characteristics
Switching Characteristics
|
Symbol |
Parameter |
Min |
Max |
Units |
|
tS |
Setup Time, A0-A7 to LOAD (parallel) |
100 |
|
nS |
|
tH |
Hold Time, A0-A7 from LOAD (parallel) |
25 |
|
µS |
|
tLL |
LOAD Low Time (parallel) |
25 |
|
µS |
|
tW |
LOAD Pulse Width (parallel) |
100 |
|
nS |
|
tSS |
Setup Time, A0/SERDAT to SCLK (serial) |
100 |
|
nS |
|
tµ |
Hold Time, A0/SERDAT from SCLK (serial) |
0 |
|
nS |
|
tLS |
Setup Time, LOAD to SCLK (serial) |
100 |
|
nS |
|
tLH |
Hold Time, LOAD from SCLK (serial) |
100 |
|
nS |
|
tCH |
Clock High Time (serial) |
100 |
|
nS |
|
tCP |
Clock Period (serial) |
200 |
|
nS |
|
tDW |
Load Dwell Time (from LOAD falling edge to next LOAD falling edge) |
1000 |
|
µS |
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tACC |
Access Time from LOAD to fO |
|
1000 |
µS |
Serial Interface
Tying the PAR/SER input low causes the Micro-Pole to receive data in the serial three-wire format described below. A timing diagram is shown in the figure below.
Three lines are used in the serial interface. These are: SCLK, LOAD and A0/SERDAT. Communication is initiated by the rising edge of LOAD. The 8 bit tuneword is clocked into the filter MSB first on the A0 line by the rising edge of SCLK. Once the tuneword has been clocked in, the falling edge of Load initiates the internal tuning sequence. NOTE: When using the Micro-Pole in the serial mode, the extra data inputs (A1-A7) should be tied either high or low.
Parallel Interface
Tying the PAR/SER input high causes the Micro-Pole to receive data in an 8 bit parallel format. The 8 bit tuneword is presented on A0 through A7, and is latched into the filter by the falling edge of the LOAD pulse. Once the tuneword is latched, the internal tuning sequence begins. A timing diagram is shown in the figure below. NOTE: When using the Micro-Pole in the parallel mode, the SCLK input should be tied high.
Other Features
The Micro-Pole is provided with the capability of shutting down the internal DC to DC converter in the event that the user wishes to decrease power consumption. The converter is controlled by the Switcher Enable (SWENA) line. Tying this line to ground inhibits the operation of the converter, and reduces the operating current of the filter. The filter will not operate in this mode, but the control logic will remain active. Returning the SWENA line to a high (or open) logic level causes the converter to start, and the filter to tune to its last commanded frequency. Retuning is not required. This input has an internal pull-up resistor and should be tied high, or left unconnected if the power-down feature is not used.
Package Outline:
NOTE:
1. Unit is not sealed. Hand clean only.
2. Each pad has a .028 diameter plated thru hole located approximately in the center of the pad.
Pinout and Ratings:
Data is believed to be accurate. All data is subject to change without notice.
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