FSF-5050 Series · RF Bandpass Filter
886 MHz SAW Bandpass Filter
FSF-5050-886M
RF bandpass filtering for 886 MHz receiver paths, with a specified 881–891 MHz passband in a 5.0 × 5.0 mm surface-mount package.
Key Features
Define the Passband and Interface
Specified Passband
881–891 MHz
Specified passband with a 10 MHz span. This is not a 3 dB bandwidth specification.
Insertion Loss
2.5 dB typ.
4.5 dB maximum over 881–891 MHz. Allow for filter loss in the receiver gain budget.
Amplitude Ripple
1.5 dB typ.
3.5 dB maximum peak-to-peak over 881–891 MHz.
The specified passband 881–891 MHz is a frequency range, not the 3 dB bandwidth. A 3 dB bandwidth is not specified in the supplied datasheet.
Electrical Specifications
Six Key Selection Parameters
Insertion loss and peak-to-peak amplitude ripple are specified over 881–891 MHz. The documented test setup uses a 50 ohm source and a 50 ohm load with direct connection. Electrical measurement temperature is not stated in the supplied table.
Scroll horizontally to view all columns.
| Parameter | Min. | Typ. | Max. | Unit | Definition / condition |
|---|---|---|---|---|---|
| Center frequency | — | 886 | — | MHz | Typical center frequency |
| Specified passband | — | — | — | MHz | 881–891 MHz; span 10 MHz |
| Insertion loss | — | 2.5 | 4.5 | dB | Over 881–891 MHz |
| Amplitude ripple (p-p) | — | 1.5 | 3.5 | dB | Peak-to-peak over 881–891 MHz |
| 3 dB bandwidth | — | — | — | MHz | Not specified |
| Operating temperature | −20 | — | +70 | °C | Operating limits; not an electrical test condition |
— = not specified in that limit column. The passband range is stated separately; it is not a typical bandwidth value. A 10 MHz passband span does not define the 3 dB bandwidth. Typical values are for design guidance; consult the FCom datasheet and confirm applicable limits for your design.
Typical Applications
Filtering within an 886 MHz RF Signal Path
UHF Signal Selection
Bandpass filtering for a receiver path whose wanted signal fits within the specified 881–891 MHz passband. Check the required signal bandwidth and permitted insertion loss.
Receiver Preselection
Evaluate the filter ahead of subsequent receiver stages to limit unwanted out-of-band energy. Confirm rejection and system noise performance for the intended blockers.
RF Test & Measurement
Frequency-selective filtering in an 886 MHz measurement path. Account for passband loss and ripple when assessing the complete setup.
Integration Notes
Start with the Documented Test Conditions
Source and Load
50 ohms each in the reference test setup. These values do not specify the device input or output impedance.
Matching and Layout
Evaluate the actual source, load, interconnect and grounding. Direct connection in the test setup does not guarantee the same response in every PCB implementation.
Temperature
Operating range −20 to +70 °C; storage range −30 to +85 °C. The electrical measurement temperature is not stated. Confirm applicable test conditions and limits across your required temperature range.
Release Checks
Verify bandwidth definition, acceptable loss and peak-to-peak ripple, blocker conditions, package height and the output/ground assignment before finalizing the design.
Package & Pin Assignment
Compact 8-Terminal SMD Package
The supplied FCom file retains a 1.5 mm maximum-height template and notes a 1.7 mm reference maximum. The applicable height is unresolved. Confirm the package drawing and terminal assignment before PCB release; the product photograph is not a PCB footprint.
- Body dimensions
- 5.0 × 5.0 mm
- Maximum height
- Requires confirmation
- Package type
- 8-SMD, no lead
FCom maps reference letters A–H to numbers 1–8. Confirm E / F output and ground assignments before using this configuration. Contact FCom about other pin configurations.
| Pin(s) | Function |
|---|---|
| 2 (B) | Input in the supplied FCom configuration |
| 6 (F) | Output in FCom / reference page 3; reference page 2 instead grounds F |
| 5 (E) | Ground in FCom / reference page 3; reference page 2 instead labels E as output |
| 1, 3, 4, 7, 8 (A, C, D, G, H) | Ground in the supplied FCom configuration |
Selection and Design-In Support
Define the Conditions That Matter to Your Design
Include your signal frequency range, required bandwidth definition, source and load requirements, operating temperature, sample quantity and estimated usage when contacting FCom. Use FSF-5050-886M as the model reference and confirm the complete ordering code before placing an order.
The model designation alone is not a confirmed complete ordering code.
Engineering Questions
Frequently Asked Questions
Is the 10 MHz passband span the 3 dB bandwidth?
No. The specified passband is 881–891 MHz, a span of 10 MHz. The 3 dB bandwidth is not specified in the supplied datasheet and must not be inferred from this range.
Does the filter have a specified 50 ohm device impedance?
The documented test setup uses a 50 ohm source and a 50 ohm load with direct connection. The device input and output impedances are not specified. Evaluate performance with the actual source, load and PCB layout.
Which pin assignment must be confirmed?
The supplied FCom file follows the reference page 3 configuration: B (2) input, F (6) output and all other terminals grounded. Reference page 2 instead labels E (5) as output and includes F among the grounded terminals. Confirm the output and corresponding ground assignment with FCom before PCB release.
What is the maximum package height?
The supplied FCom file retains a 1.5 mm maximum-height template but notes a 1.7 mm maximum in the reference drawing. The applicable maximum height is unresolved. Confirm the mechanical dimensions before PCB layout.
What temperature conditions apply?
The operating range is −20 to +70 °C and the storage range is −30 to +85 °C. The supplied electrical table does not state a measurement temperature. Confirm the applicable test temperature and full-temperature limits for your design.
What information should I include in an inquiry?
Include FSF-5050-886M, the required signal frequency range and bandwidth definition, source and load requirements, temperature range, package and pin requirements, sample quantity and estimated usage. Confirm the complete ordering code with FCom before ordering.