Peregrine Semiconductor has introduced a range of the RoHS-compliant PE64904 and PE64905 DuNE digitally tunable capacitors.

The 5-bit, 32-state digitally-controlled variable capacitors are intended to provide impedance tuning for RF applications such as tunable filters and matching networks to RFID, antenna tuning and other wireless communications.

They can be used in series or shunt configurations for different tuning circuit topologies.

Capacitance range is 0.7 pF -4.6 pF in discrete 126 fF steps (6.6:1 tuning ratio) in series configuration, and 1.1 pF -5.1 pF in discrete 131 fF steps (4.6:1 tuning ratio) in shunt configuration.

For programming, both 3-wire SPI-compatible (PE64904) and 2-wire I2C-compatible (PE64905) serial control versions are available.

www.psemi.com