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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

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


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