? Thanks to the Chip-in-Oil (CiO) technology developed at Keller, the trend toward miniaturisation is now becoming a reality. In their series 4 LC...9 LC pressure transmitters, the special ASIC for signal processing is fitted directly next to the pressure sensor, in the same housing, under oil, and with the exclusion of air. This yields a host of advantages in terms of application: all the key pressure measurement components are now protected against the risks from humidity and condensation. The interior wiring is implemented with short, lightweight bonding wires, while sintered-in pressure-resistant glass lead throughs feed the transmitter signals out. Together with the high-grade steel housing, they form a Faraday cage around the measuring system, acting as feed through capacitors. This makes the CiO technology absolutely RFI resistant up to field strengths of 250 V/m and for frequencies of up to 4 GHz. Series 4 LC...9 LC pressure transmitters offer two outputsignals: a ratiometric analog voltage output and a digital inter-integrated circuit interface (I2C).
• more@click-Code: ADI02828