On November 21, 2016, the German company **Elmos** introduced the **E520.44**, a sensor signal processor (SSP) designed for flexible analog voltage output and featuring a digital SENT interface. This device is well-suited for automotive electronics applications, particularly in areas like resistive bridges, pressure, stress, and torque measurements. With its built-in EEPROM, customers can easily adapt to off-the-shelf pressure sensor applications by simply using this chip.
The **E520.44** stands out for its extremely low input noise, offering best-in-class sensitivity in the range of 1mVpp/V to 100mVpp/V. This ensures an excellent signal-to-noise ratio (SNR), even at very low signal levels. For instance, when the input is as low as 5mVpp, the SNR remains above 70dB. The device also features a fast settling time of less than 0.5ms and a delay of under 2ms, making it ideal for real-time applications.
The single-wire SIO connection simplifies calibration and operation, matching the device’s active mode configuration. It operates on a 5V power supply and can withstand voltage surges up to +40V or -28V. Moreover, the E520.44 functions reliably even in high-temperature environments, up to 150°C. Its fully integrated self-test and diagnostics make it highly suitable for safety-critical automotive systems.
Designed specifically for pressure measurement systems, the **E520.44** supports the new digital SENT interface protocol, which complies with the SAE J2716 standard. This makes it a powerful solution for modern automotive sensor networks.
Some key advantages of the IC include a wide adjustment range, simplified system design through the use of a single-line SIO, and multiple configuration options. Additionally, the device is especially well-suited for automotive applications due to its built-in self-test functionality, along with protection against overvoltage, surge, and reverse voltage conditions.
**Main Features:**
- Extremely low noise with front-end amplifier and ADC
- SNR >70dB at input as low as 1mV/V
- PGA configuration adjustable from 1 to 50mV/V
- Adjustable offset: ±150% FS
- Digital compensation for offset, gain ripple, and nonlinearities up to third order
- Output options: Analog voltage or digital SENT (SAE J2716, JAN2010)
- Supply voltage: 5.0±0.5V with over-voltage and reverse polarity protection (up to 28V)
- Single-line programming interface
**Typical Applications:**
- MEMS or thin-film piezoelectric sensors
- Strain sensors
- Automotive or industrial-grade products with resistive bridge configurations
This device is an essential component for developers seeking reliable, high-performance signal processing in automotive and industrial sensor systems.
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