LTC2312ITS8-14

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Data Acquisition - Analog to Digital Converters (ADC), such as the LTC2312ITS8-14, are used to convert analog signals into digital representations for further processing. This article provides an overview of the application field and working principle of the LTC2312ITS8-14.

The Application Field of the LTC2312ITS8-14

The LTC2312ITS8-14 is an 18-Bit, 12-Channel Delta Sigma ADC. It is a versatile IC, suitable for applications where high resolution, low noise and fast speed are required. It is suitable for industrial and automotive applications, including audio, instrumentation, and test and control systems.

Its 8 - 14 pA maximum total system offset and low offset drift of 0.1 μV/°C over process, temperature and time makes it a great choice for precision data acquisition systems. It reaches a SNR of 87 dB and THD of -95 dB with a1 kHz signal and is capable of simultaneously sampling two groups of four channels, making it the perfect device for multiplexing applications.

The LTC2312ITS8-14 also features an optional 1 MHz sample rate for fast response applications, along with high accuracy, low jitter and fast settling times. The device also supports Speed Mode (Normal Mode) switching, allowing the system to switch between two scan rates. The Speed Mode improves sampling speed without compromising noise or resolution.

Working Principle of the LTC2312ITS8-14

The LTC2312ITS8-14 works on the principle of Delta-Sigma Analog-to-Digital Conversion, which involves a simple three-step process. First, the analog signal is converted into a time-displaced pulse-width-modulated (PWM) waveform, which is then low-pass filtered, and finally, converted into a digital representation.

The device features an integrated delta-sigma modulator and input buffer, along with track-and-hold and reference circuits. Its control circuit enables simultaneous sampling of multiple channels, allowing for fast, accurate data acquisition. Additionally, the LTC2312ITS8-14 also features a Serial Peripheral Interface (SPI) interface, providing an easy way to integrate the device into digital systems.

The LTC2312ITS8-14 has a wide range of operating supply voltages, from 2.7V to 5.5V, and can be powered directly from a single channel or shared across multiple channels. It also has programmable digital I/O, selectable input range, gain, and reference range. The device is available in a variety of package options, including a compact, space-saving 16-pin SOIC package.

Conclusion

The LTC2312ITS8-14 is an ultra-precise Delta Sigma AD Converter designed for applications requiring high speed, resolution, and low noise performance. With its integrated modulator, input buffer, and reference circuitry, it is the perfect choice for precision data acquisition systems. The LTC2312ITS8-14 offers several features, such as its wide operating voltage, Speed Mode switching, and SPI interface, making it suitable for a variety of applications.

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