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MINI-ERF® Series
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The MINI-POLE® Extended Range Series of tunable filters was developed to address applications needing a small, surface mount package with wide tunability. This tunability is accomplished by the use of multiple internal tunable filters along with high performance PIN diode RF band select switches all contained in one housing. The tunable filters are designed to minimize size and power consumption while maintaining high RF power handling and linearity characteristics. Parallel or serial digital interface can be selected by a mode pin for ease of integration into your design.
  • Specifications
  • Performance
  • Product Numbering Table
  • Interface And Control Notes
  • Mechanical Details
  • Pinout and Ratings
  • Datasheet

PRODUCT SPECIFICATIONS

Frequency Coverage  30 MHz to 520 MHz 
Input/Output Impedance  50 Ω 
Inband Input/Output VSWR  1.5: 1 typical, 2.2: 1 max 
Insertion Loss  See Table 1 below 
Percent Bandwidth  See Table 1 below 
Ultimate Attenuation  65 dB typical 
Shape Factor (30 dB/3 dB)  6 typical, 7.2 max 
Inband RF Power Handling  +32 dBm (input, typical) 
Out of Band RF Power Handling  +33 dBm @ +/- 15% 
Inband Third Order Intercept Point  +40 dBm (input) 
Tuning Control  Serial (SPI) 
Tuning Speed  15 µsec typical, 21 µsec max 
DC Power  +3.3 VDC @ 200 mA max 
+100 VDC @ 2.5mA max 
Operating Temperature Range  -40 to +85°C  
Size (in. / mm.) 1.75 x 2.4 x .385 / 44.5 x 61 x 9.8  


Table 1:

Part Number Frequency
Range (MHz) 
Typical Selectivity
@ fc +/- 10% (dBc) 
Typ. 3 dB
BW (%)
 Insertion
Loss 
Typ. Min Typ.  Max  Typ.  Max 
 MN-30-520-4-S04  30-520 22 19  4.7  5.4 5.2 7.0
MN-30-520-7-S04 30-520 16 14 7.2 8.2 3.5 5.0


The following plots illustrate approximate performance:

Figure 1: 30 MHz Measured Data

MN-ERF-30MHz.png

Figure 2: 90 MHz Measured Data

MN-ERF-90MHz.png

Figure 3: 250 MHz Measured Data

MN-ERF-250MHz.png

Figure 4: 500 MHz Measured Data

MN-ERF-500MHz.png

 Series   Frequency (MHz)   Bandwidth (3 dB)   Package 
MN 30-520 4 S04
MN 30-520 7 S04

Example 4% 3dB BW Part Number: MN-30-520-4-S04




General Information

The MINI-ERF® requires two supply voltages. A +3.3 VDC digital supply and a high bias voltage of +100 VDC is required to bias the diodes. These supply voltages should be adequately filtered as noise present on these pins will influence the RF signal purity.

Digital Interface Information

The digital interface format is SPI serial or parallel depending on the state of the mode control pin.

MN-ERF G2mech

PIN FUNCTION DESCRIPTIONS

PIN # FUNCTION DESCRIPTION
1 VCC Supply Voltage Input
2, 17, 19, 20, 21,
23, 24, 26, 27, 28
GND Digital and Analog Ground
3, 4 NC No Connect1
5 A7/MOSI Parallel Data A7/Serial Tune
Interface Master Output Slave Input
6 A6 Parallel Data A6
7 A5/SCLK Parallel Data A5/Serial
Tune Interface Clock
8 A4/CS Parallel Data A4/Serial Tune
Interface Chip Select
9 A3 Parallel Data A3
10 A2 Parallel Data A2
11 A1 Parallel Data A1
12 A0 Parallel Data A0 (LSB)
13 TUNE READY  Tune Ready Indicator
14 SER/PAR Serial/Parallel Command
Interface Selection
15 STB Strobe
16 TUNE MODE RESERVED
18 VBB High Bias Supply Voltage Input
22, 25 RF IN/OUT RF Signal Input or Output

1Leave floating for unit to function properly

GENERAL OPERATING RATINGS

Symbol Parameter Conditions Min. Typ. Max. Unit
VCC
Supply voltage - 3.135 3.3 3.6 V
ICC VCC current consumption at 3.3 V - - - 200 mA
VBB High bias supply voltage - 90 100 110 V
VIH Digital high level input voltage VCC = 3.135 – 3.6 V 0.7 * Vcc - Vcc + 0.5 V
VIL Digital low level input voltage VCC = 3.135 – 3.6 V -0.5 - 0.3 * Vcc V
IOH/IOL Digital Interface pin source sink current - -15 - 15 mA
PIN Maximum RF input power for linear operation Signal is in passband
f0 = 30-520 MHz
- - 30 dBm
FRANGE Tunable frequency range - 30 - 520 MHz
ZO Input/output impedance - - 50 - Ω
VSWR Voltage Standing Wave Ratio - - 1.5:1 2.2:1 -
IL Insertion loss See Specifications Table 1 - - - -
BW Bandwidth See Specifications Table 1 - - - -
- Selectivity at +/- 10% See Specifications Table 1 - - - -
- Tuning time - - 15 21 μs
FDRIFT Center frequency drift over temperature -40 to +85°C -30 -50 -90 ppm/°C
TA Ambient temperature - -40 - 85 °C


MINI-ERF Downloadable Datasheet PDF

MINI-ERF 1
MINI-ERF 1

1.0 Ordering Information

MINI-ERF 2

Note: Options may be limited to particular frequency bands and/or configurations. Consult Pole/Zero for your application.

Example product number: MN-30-520-7-S04

2.0 Pinout and Functional Information

2.1 Pinout

MINI-ERF 3

2.2 Pin Description

MINI-ERF 4

3.0 Specifications

3.1 Absolute Maximum Ratings²

Voltages are referenced to GNS (ground = 0V). Operating at room temperatures (unless otherwise noted).

MINI-ERF 5

3.2 Handling Ratings

MINI-ERF 6

3.3 Recommended Operating Conditions

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3.4 Electrical Characteristics

Voltages are referenced to GND (ground = 0V)

MINI-ERF 8

3.5 Typical Characteristics 

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3.6 Timing Requirements

3.6.1 SPI Interface Timing

The SPI tune command interface is a standard SPI interface with Mode = 0 (CPOL = 0, CPHA = 0). There are always 16 data bits regardless of the tune mode used. Any bits that do not affect the frequency offset of the filter should always be set to 0. The interface receives the data most significant byte and most significant bit first. The SPI interface can be used in legacy and bit weighted tune modes. The SPI interface is selected by leaving SER/PAR floating or pulled to Vcc. Pin J8 and J15 (CS & STB) must be tied together externally for SPI mode to function properly.

MINI-ERF 10

Figure 7. Serial Timing Diagram

MINI-ERF 11

3.6.2 Parallel Interface Timing

The Parallel tune command interface is an 8-bit wide synchronous parallel interface with a two-byte load. There are always 16 data bits per parallel tune ragardless of the tune mode used. Any bits that do not affect the frequency offset of the filter should always be set to 0. A7 is the most significant bit and A0 is the least significant bit. The Parallel interface can be used in legacy and bit weighted tune modes. Keeping SER/PAR pulled to GND will enable the parallel tune command interface.

MINI-ERF 12

Figure 8. Parallel Timing Diagram

MINI-ERF 13

4.0 Functional Description

4.1 Legacy Tune Mode

Legacy tune mode is used the same way that the tune interface of a legacy ERF product is used. The tune word is a two-byte load with the first byte (MSB) being the band the filter should tune to, and the second byte (LSB) being the frequency offset in the chosen band. Legacy tune mode can be selected by leaving the TUNE MODE pin floating or pulled up to +3.3 V. The legacy tune mode can be used in both serial and parallel modes.

MINI-ERF 14

MINI-ERF 15

5.0 Detailed Description

5.1 Digital Interface

MINI-ERF 16

5.2 Example Tune Commands

MINI-ERF 17

5.3 Additional Interface Detail

MINI-ERF 18

6.0 Tune Time

Tune times include internal processing of the tune command data and the 90% settled RF response time of the filter. This time excludes the time required to load the tune command into the filter. Low level signal measurements were utilized to show the Rx tune time that can be expected.

In addition, RF power in excess of +25 dBm is considered to be "hot switching" of the filter. While the data in "Table 11. Typical RF Tune Times" was taken via "hot switching", this does not imply that tuning operations of the filter into these levels can be done reliably. It is recommended that RF is less than +20dBm during a tune event.

MINI-ERF 19

7.0 Application Information

7.1 Application Circuits

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Figure 9. Serial Application Circuit

MINI-ERF 21

Figure 10. Parallel Application Circuit

8.0 Package Information

8.1 Package Detail

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8.2 Recommended Pad Layout

MINI-ERF 23

9.0 Safety Notes 

9.1 Handling Information

MINI-ERF 24

MINI-ERF 25

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10.0 Legal Information

10.1 Disclaimers

Limited warranty and liability - Information in this document is believed to be accurate and reliable. Pole/Zero and its suppliers disclaim all warranties, whether express or implied, including implied warranties of merchantability, fitness for a particular purpose, and non-infringement. The entire risk arising out of use or performance of this information remains with Licensee. Pole/Zero and its suppliers do not make any representations regarding the results of the use of the information in this document. 

To the maximum extent permitted by applicable law, in no event will Pole/Zero or its directors, employees, distributors, licensors, suppliers, agents or resellers or suppliers ("Pole/Zero parties") be liable for any indirect, special, incidental, consequential, or exemplary damages, even if such party has been advised of the possibility thereof. The Pole/Zero parties' entire liability will not exceed the sum of the replacement of defective product or provision of a reasonably similar product, at Pole/Zero's discretion. Some jurisdictions do not allow the exclusion or limitation of incidental, consequential or special damages, so this exclusion and limitation may not be applicable to Licensee. The Pole/Zero Parties will not be liable for any claims or damages arising out of content provided by Licensee. 

10.2 Right to Make Changes

Pole/Zero Corporation reserves the right to make changes to information published in this document, including without limitation specifications and product descriptions, at any time and without notice. This document supersedes and replaces all information supplied prior to the publications hereof.

11.0 Learn More

For additional information, please visit /polezero

12.0 Contact and Support

Pole Zero Corporate Office

5558 Union Centre Drive

West Chester, OH 45069, USA

513-870-9060 (Phone)

513-870-9064 (Fax)

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