Sensor Signal Conditioner

October 1, 2011

The ZSSC3008 signal conditioner integrated circuit (IC) from ZMD AG (Dresden, Germany) features enhanced onboard diagnostics and second-order linearity correction. The calibrated ZSSC3008 and a specific sensor are mated digitally.

The technology offers EEPROM signature, bridge connection checks, bridge input-short and open-bridge detection, power loss detection, and output current limits for short-circuit protection. For sensor correction, the ZSSC3008 employs offset correction and gain programming to precisely calibrate the bridge output signal. Two analog and one digital outputs are also included.

Programming and single-pass calibration of the sensor and the ZSSC3008 are implemented in a standard PC environment using the ZSSC3008KIT development tools. The kit includes the device in an SOP8 package, development board, USB cable, and calibration software.

The ZSSC3008’s standard supply voltage is 2.7 to 5.5V, or up to 30V with external JFET. Accuracy is 0.25% over the -25 to +85°C range, and 0.5 % from -40 to +125°C. Depending upon configuration, current consumption typically ranges from 1mA down to 250μA. Response time is typically 1ms.

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