ST's smallest dual-channel filter streamlines board designs

The market's smallest integrated single-chip, dual-channel filter from STMicroelectronics allows designers to streamline and simplify circuit design and board layout, reduce product size and make room for new functions. The filter has a 1.2x3.4mm² footprint and a height of less than 560μm after reflow.

This BOM-saving DLPF-GP-01D3 filter can replace up to 16 discrete surface-mount components and save 35mm² of PCB area in ZigBee RF4CE remotes and consumer electronics equipment such as TVs, alarms, lighting, home gateways and others.

The GreenPeak GP540 and GP561 RF4CE communication controllers enable cheap, single-layer PCB integration, which is supported by the new dual filter from ST. This allows short, straight tracks for signal, ground and common connections between the two devices. The good signal quality is a result of ST's integrated passive device technology leveraged with non-conductive glass substrate.

The two integrated filter channels also provide high attenuation outside the 2,400 to 2,500MHz frequency range and have low-in-bandwidth insertion and return loss. The chip is currently available in an 11-bump flip-chip package, priced from $0.23 for 5,000 units.