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 ideal for use in automotive electronics, particularly in applications involving resistive bridges, pressure, stress, and torque measurements. With its built-in EEPROM, customers can easily adapt to off-the-shelf pressure sensor solutions by simply using this chip.
The **E520.44** offers extremely low input noise, with a best low-range sensitivity ranging from 1mVpp/V to 100mVpp/V. This ensures an excellent signal-to-noise ratio (SNR), even at very low signal levels. For example, when the input is as low as 5mVpp, the SNR remains above 70dB. The device has a fast settling time of less than 0.5ms and a delay of under 2ms. It uses a single-wire SIO connection for both calibration and active mode operation, simplifying system design.
The SSP requires a 5V power supply and can withstand voltage surges up to +40V or -28V. It continues to function reliably even in high-temperature environments, operating efficiently up to 150°C. The fully integrated self-test and diagnostics features make it well-suited for safety-critical automotive applications.
Designed specifically for pressure measurement systems that use the new digital SENT interface protocol, the **E520.44** complies with the SAE J2716 standard. Its advantages include a wide adjustment range, simplified system integration through a single-line SIO interface, and multiple configuration options. Additionally, the device is highly suitable for automotive applications due to its self-test functionality, along with self-recovery capabilities under overvoltage, surge, and reverse voltage conditions.
**Key Features:**
- Extremely low noise with a front-end amplifier and ADC
- SNR greater than 70dB at input levels as low as 1mV/V
- PGA configuration: 1 to 50mV/V with adjustable offset (±150% FS)
- Digital compensation for offset, gain ripple, and nonlinearities up to third order
- Analog voltage or digital SENT (SAE J2716, JAN2010) output
- Supply voltage: 5.0 ± 0.5V with overvoltage 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
The **E520.44** represents a powerful solution for modern sensor systems, especially in the automotive sector where reliability and precision are essential.
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