LTC2150CUJ-14#PBF

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The LTC2150CUJ-14#PBF is a Data Acquisition - Analog to Digital Converters (ADC) device. It is designed to permit conversion of analog signals into digital values at 14-bit resolution. The ADC supports sampling rates up to 145 ksps (kilosamples per second), and a programmable input gain range of 12.4 dB. The part also offers a wide 9 – 36 V, operating voltage supply range, making it a versatile choice for many applications.

The key features of this ADC device are its accuracy at 4 mV LSB, low power consumption (exceeding 1 mW of power consumption in sleep mode, and 55 µW when actively converting) and its 2 MHz ±1% programmable Low Pass Digital Error Filter.

In terms of its application field, the LTC2150CUJ-14#PBF can be used in various industry sectors, such as in the automotive industry, to measure engine and vehicle parameters such as speed, torque, vibration and tire pressure, as well as measuring ele­vator heights and shaft positions, wind turbine acceleration and vibration. It is also applicable in security, safety and surveillance systems. This device is highly qualified and rated to perform in functional safety system as defined and required by ISO 26262.

In terms of its working principle, it is essentially an analogue-to-digital converter (ADC), that performs this conversion through two distinct steps. The first step is charge transfer. This step occurs when the analogue signal is sampled from the differential inputs, and transferred to the internal sample-and-hold circuit. The second step is conversion. Here, the analogue data is converted to digital data through the integrated pipeline ADC. The pipeline architecture helps maintain the 14-bit data resolution, even when the sampling rate is set to maximum rate (145 ksps).

To accurately perform the sampling and conversion of the analogue data, the LTC2150CUJ-14#PBF features an internal Low Pass Digital Error Filter (2 MHz filter) and a 2 GHz sample rate clock. This clock can be adjusted and programmed, allowing users to set the sampling rate accordingly. The filter helps reduce aliasing and other spurious signals, while the sampling rate clock ensures that data is no longer reliably read at higher frequencies.

The LTC2150CUJ-14#PBF is also equipped with various protection features. It provides input overvoltage protection for its two differential inputs, to ensure reliability of analog signals and data accuracy even when the input voltage exceeds specification by 20 V. In addition, the device also incorporates a watchdog timer to detect and protect against system runaway conditions.

The LTC2150CUJ-14#PBF is a robust ADC device, suitable for a variety of industrial and automotive applications. Its low power consumption and high accuracy levels make it an ideal choice for OEMs and system designers. Its various programmable features, as well as its protection features allow users to adjust the sampling rate, low pass digital filter and input voltage accordingly, for a reliable and accurate performance.

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