5723 Notch Filter
Model 5723 is a digitally tunable UHF notch filter with a notch that tunes from 486 to 750 MHz, while the passband stays flat across the full 225 to 750 MHz range. A system covering the whole UHF band can therefore notch out an interferer in the upper half without losing anything below it. The filter uses a lumped element design, which keeps it small and holds a constant absolute notch bandwidth across the tuning range. The notch frequency is set over an SPI interface in 200 kHz steps, and the same interface switches the filter between active mode (notch on) and bypass mode (notch off). Notch rejection is 17 dB typical, 15 dB minimum, at ±2 MHz from the notch center. Passband insertion loss is 0.7 dB typical in bypass mode and 1.2 dB typical outside fnotch ±24 MHz. Internal temperature compensation holds the notch frequency in spec from -40 °C to +85 °C. The filter handles +33 dBm input power and runs from a single 3.3 V supply. It comes in 1.50 x 1.10 x 0.25 inch surface mount housing.
- Specifications
- Performance
- Mechanical
- More Details
| Passband Frequency Range | 225 to 750MHz |
| Tunable Notch Frequency Range (fnotch) | 486 to 750MHz |
| Notch Rejection at fnotch±2MHz | 17dB typical, 15dB min |
| Passband Insertion Loss outside fnotch±24MHz | 1.2dB typical |
| Insertion Loss at fnotch±14MHz | 3.2dB typical, 3.8dB max |
| Impedance (Input/Output) | 50 Ω |
| VSWR | 2.5:1 |
| Temperature Range | -40°C to +85°C |
| RF Power Handling | +33dBm |
| IIP3 | TBD |
| DC Power | |
| DC Voltage | 3.3 VDC ±0.3 VDC |
| DC Current Max | 60mA |
| Control Interface | SPI Serial Input |
| Tuning Resolution | 200 kHz |
| Switching Speed, 90% RF Power (typical) | < 50μsec |
| Dimensions [L x W x H] | 1.50 X 1.10 X 0.25 inches
38.10 X 27.94 X 6.35 mm |
Superimposed plots every 25MHz:
Bypass mode:
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.
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