Elmos: Low-noise sensor signal processing with SENT interface

Elmos E520.47

E520.47 for automotive applications - developed according to ISO 26262

Elmos introduces the E520.47, a sensor signal processing IC with SENT interface that supports the simultaneous signal processing of two resistive sensor bridges. The IC has been specially developed for the requirements of automotive applications. The development was in accordance to ISO 26262, in order to be able to fulfill safety requirements in the system up to ASIL C. Possible fields of application include brake-, sensor-, MEMS p sensor-applications and the evaluation of resistive bridge sensors.

Elmos - E520.47

The E520.47 offers low-noise sensor signal conditioning with two single 15-bit delta-sigma ADCs for two resistive bridge sensors, including compensation and linearization. Two additional temperature channels with 14-bit delta-sigma ADC allow precise detection and linearization of different temperature sensors. In addition, the IC integrates internal sensor and self-diagnosis. The sensitivity range is 3 - 112 mV/V. The IC offers a 10-level coarse gain and a 31-level coarse offset adjustment.

All compensated and linearized sensor data are available at the digital SENT interface output. The SENT pin allows a serial I/O communication, enabling true 1-wire end-of-line configuration and calibration. Alternatively, an additional I2C interface allows faster access to sensor, diagnostic, calibration and configuration data. A calibration tool set including practical software is provided.

The IC is available in a QFN20L4 package or as an unhoused IC (bare die).

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