5690

Netcom’s 5690 is a tunable frequency range filter.

Unlike a regular tunable bandpass filter, where only the center frequency is adjustable, the Multi-Tune filter is a digitally programmable filter with adjustable passband between any f1 and f2 frequencies.

f1 and f2 are independently tuned at any frequency, forming a filter which has a completely adjustable center frequency and bandwidth.

This filter is offered in a small integrated SMT package to support applications where compact design, power requirements, and board layout flexibility are important.

  • Specifications
  • Performance
  • Mechanical
  • Ordering Information
  • Evaluation
  • Serial Address
  • More Details
Specifications

The following table shows the typical performance of the filter.

Frequency Range 1.5 to 30 MHz
Passband * f1 to f2
Center Frequency (f1 + f2) / 2
Impedance (Input /Output) Typical 50 Ω
f1 – 5% Rejection Between -4.5dB (max) and –6.5dB
f2 + 5% Rejection Between -4.5dB (max) and –9dB
f1 – 10% Rejection Between -11dB (max) and –14dB
f2 + 10% Rejection Between -11dB (max) and –17dB
f1 – 20% Rejection < -30dB
f2 + 20% Rejection < -29dB
Tuning Speed < 50 µs
Passband Insertion Loss (max) over wideband at Ambient Temperature < -4dB
Passband Insertion Loss for narrow bandwidth (f1=f2) at Ambient Temperature -6.5dB
Passband Return Loss Between -6dB and -10dB
Tuning Resolution (f1 / f2) 100KHz (min)
P1dB 1.5MHz to 4MHz 29dBm
P1dB 4MHz to 30MHz 30dBm
Max Power 30dBm
IP3 1.5MHz to 4MHz 38dBm
IP3 4MHz to 11MHz 43dBm
IP3 11MHz to 30MHz 48dBm
Estimated Spurious Level -124dBm
DC Voltage 3.3 Volts
DC Current Max 50 mA
Operating Temperature Range -40 to +85°C
DC Current Max 425 mA
Operating Temperature Range -40 to +85°C
Control Interface SPI Input
Dimensions 2.2 x 2.2 x 0.5 inches
55.88 x 55.88 x 12.70 mm
Performance

Response Plots

Typical Performance f1=1.5MHz, f2 from 1.5 to 30MHz

Typical Performance f1=1.5MHz, f2 from 1.5 to 30MHz

Narrowband Typical Performance f1=f2 from 1.5 to 30MHz

Mechanical

Ordering Information

Evaluation

Corresponding Evaluation Board

Netcom’s 5690 is a tunable High Pass/Low Pass filter that can be tuned over the frequency range of 1.5MHz to 30MHz.

The EB5680 Evaluation Board is designed to test and evaluate Netcom’s Model 5690 Frequency Agile Filter. The evaluation board is used to supply power to the filter, provide tuning control, facilitate measurement of the filter’s RF parameters, and switching speed.

Tuning control of the filter is provided by the EB5680 Evaluation Board by a USB module and user interface program to provide frequency tuning control for the 5690 tunable filter. The EB5680 Evaluation Board includes a separate RF thru path for calibration of test equipment to improve the accuracy of RF measurements.

Serial Address

Serial Address Input Timing Diagram

Tuning addresses start at 15 decimal (1.5MHz) and end at 300 decimal (30MHz) in 100KHz increments for the Low Pass and High Pass address. Each decimal step represents a 100KHz frequency step increase or decrease. The Low Pass filter must be set at a higher frequency address than the High Pass filter frequency address . Tuning of the filter starts when the last data clock (32nd) pulse of the address is sent to the unit while the CS (Chip Select) is low.

The filter will move to the correct tune channel which allows the tuned address frequency to pass while meeting all of the tuning parameters. In some cases the filter tune channel may not move.

   * Data clocked in on SCLK leading edge.

  ** Filter tunes to address on last clock bit of address SCLK.

*** Tune Ready at logic low when filter processing tuned address.

 

Device Commands and Addressing

The 5690 is designed to interface directly to the Serial Peripheral Interface (SPI) interface. The instructions and Addressing are listed in the table below. All instructions, addresses, and data are transferred with the MSB first and start with a High to Low transition if the SPI_CS line.

READ UNIT FW CODE1101 1100 0000 0000Unit FW RegisterRead FW code 4-letter code (ASCII)

Instruction Name Instruction Format Operates On Operation Description
LOW PASS ADDRESS 0000 0000 0000 1111 –
0000 0001 0010 1100
Unit Address Register Set Low Pass Address
xh000F – xh012C (2)
HIGH PASS ADDRESS 1001 0000 0000 1111 –
1001 0001 0010 1100
Unit Address Register Set High Pass Address
Xh900F – xh912C (3)
READ UNIT ID 1011 0100 0000 0000 Unit ID Register Read 4-digit Unit ID code (ASCII)
READ UNIT PRODUCTION DATE 1111 1110 0000 0000 Unit Date Register Read 4-digit Unit Date Code (ASCII)

LOW PASS ADDRESS: The 5690 Multi-Tune Filter will tune the Low Pass filter cutoff when the address in the range of 15 (decimal) to 300 (decimal) is clocked into the filter. Note: The Low pass frequency must be tuned Higher than the High Pass tuned frequency.

HIGH PASS ADDRESS: The 5690 Multi-Tune Filter will tune the High Pass filter cutoff when the address in the range of 15 (decimal) to 300 (decimal) is clocked into the filter. Note: The High pass frequency must be tuned lower than the Low Pass tuned frequency.

READ UNIT ID: The 5690 Multi-Tune Filter will send a 4-digit ID “5690” in ASCII code when the command is sent to the unit. The unit will stay at the last tune channel when the command is sent.

READ UNIT FW CODE: The 5690 Multi-Tune Filter will send a 4-digit Firmware ID in ASCII code when the command is sent to the unit. The unit will stay at the last tune channel when the command is sent.

READ UNIT PRODUCTION DATE: The 5690 Multi-Tune Filter will send a 4-digit date in MMYY format in ASCII code when the command is sent to the unit. The unit will stay at the last tune channel when the command is sent.

Device Command Timing

 

Device Command Timing

More Details

Environmental Specification Standards

Lead Plating: 

  • ELECTROLESS NICKEL, TYPE 1, CLASS 1, Cu/Ni P7, 100 MICRO INCHES (0.0001 INCHES) MINIMUM, IMMERSION GOLD PLATE 2 TO 6 MICRO INCHES (0.000002 TO 0.000006 INCHES) ON OUTER LAYERS.

Temperature:

  • High temperature shall meet MIL-STD-810E, Method 501.3, Procedure I to 85°C storage, and procedure II to 85°C operating.
  • Low temperature shall meet Method 502.3, Procedure I to -57°C storage, and Procedure II to -40°C operating.

Vibration: 

  • MIL-STD-810E Method 514.4 Ground Mobile Test Procedure I, Test Condition I – 3.4.7

Shock: 

  • MIL-STD-810E Procedure I, Method 516.4 – Functional Shock.

Reflow: 

  • 245°C 15 seconds [max]

Cleaning: 

  • Recommend cleaning solvents used which meet ODC (Ozone Depleting Chemical) requirements.
  • Solvents containing methylene chloride or other epoxy solvents should be avoided since these will attack the epoxy encapsulation material of some components.
  • Ultrasonic cleaning not recommended.

Moisture Sensitivity Level: 

  • MSL 3