Signal Amplifier Suits Sensors With Current Input
Mazet has announced a four-channel MDDC sensor-signal amplifier for sensors with current input. The on-chip solution is capable of digitising low levels of current input at high speeds with high bandwidths and dynamics. The MDDS is suitable for handling rapidly changing process parameters that sensors provide in applications such as inline measurement of colour and pressure for real-time control of automated processes. Each channel of the transimpedance amplifier is independently digitally programmable at 16 stages via 5 bits of its SPI interface. Gradation of transimpedance per channel is implemented binarily with additional intermediate levels in the 1.6 to 100Mohm band. At maximum transimpedance, fast current measurement is possible in the nA range with a dynamic range of 30dB. The transimpedance amplifier stages are characterised by low noise. They respond in a highly linear manner with channel synchronism. External programming of the amplifier stages allows for independent, dynam...