BFCN-1690+

Overview

The BFCN-1690+ is a surface-mount ceramic bandpass filter manufactured by Mini-Circuits. It operates with a center frequency of 1.69 GHz and provides a bandwidth ranging from 1570 MHz to 1810 MHz. The component features an insertion loss of 2.53 dB and maintains a system impedance of 50 Ω. Designed for robust performance, it supports an operating temperature range between -55°C and +100°C. This six-terminal SMD device is engineered for signal conditioning in RF applications requiring precise frequency selection.

Feature Summary

• Surface mount construction utilizing ceramic technology for stable RF filtering
• Designed for high isolation and sharp skirt selectivity within the specified passband
• Operates reliably across extended industrial temperature ranges

Applications

• RF front-end filtering in wireless communication systems
• Signal conditioning in upconverter assemblies
• Frequency selection in S-band receiver architectures

Procurement Notes

Verify the specific datasheet version for the BFCN-1690+ to confirm exact electrical tolerances and mechanical dimensions before integration. Ensure compatibility with standard surface-mount reflow profiles. Confirm that the 50 Ω impedance matches your system design requirements. Check for any recent updates regarding RoHS compliance status or pinout configurations in official Mini-Circuits documentation.

Selection Notes

Select this component when a fixed center frequency of 1.69 GHz is required with minimal insertion loss. The ceramic construction offers stability compared to LC alternatives. Consider the 240 MHz bandwidth relative to your signal spectrum needs. Evaluate the thermal performance limits if operating near the upper temperature boundary. Ensure the SMD package fits your PCB footprint constraints.

Part Context

This part belongs to Mini-Circuits' line of passive RF filters designed for frequencies up to microwave ranges. Ceramic filters like the BFCN-1690+ are typically used where size, cost, and performance balance is critical. They serve as essential components in signal chains for mobile infrastructure and consumer electronics requiring reliable bandpass characteristics.

Replacement Considerations

Consult Mini-Circuits official substitution guides for verified equivalents. Cross-reference specifications such as center frequency, bandwidth, and insertion loss carefully. Ensure any substitute maintains the same 50 Ω impedance and surface-mount form factor to avoid redesigning the PCB layout.