LTC1197LIMS8#PBF

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Data Acquisition – Analog to Digital Converters (ADCs) is a very important field of technology which has seen a lot of advancements in the recent years, one example of which is the LTC1197LIMS8#PBF. This very chip offers a wide range of features and is highly suitable for the various applications. In this article we will be exploring the features, applications and working principle of the LTC1197LIMS8#PBF.

Features

The LTC1197LIMS8#PBF is a monolithic low power 8-bit analog-to-digital converter (ADC). It has an integrated 9.98mW power-down current, and operates from 2.375V to 3.6V. It has a high resolution 8-bit ADC with a very low in-band source-referred noise of 17μV and very least-significant-bit (LSB) DNL of 0.25LSB. The internal reference has a wide range of adjustments – 1.2V to 3.6V. The input voltage sections into the AINx (x = 0, 1 and 2) input analog grounds to the ADC, while the AIN (x = 3, 4 and 5) provide digital outputs. The ADC also has an internal linear oscillator, to generate the conversion clock, while the internal register can provide reference voltage adjustments.

The total distance8 between the digital and analog grounds is only 800μm, thereby reducing the electromagnetic interference (EMI) to a minimum. The chip is also RoHS compliant, making it a very environment friendly device.

Applications

The LTC1197LIMS8#PBF ADC is suited for a wide variety of industrial and consumer applications. It is ideal for patient monitoring systems, industrial automation systems, consumer personal healthcare products, such as blood pressure monitors, heart rate monitors and other non-invasive patient monitoring systems. It is also suitable for remote sensing and energy exploration systems, touchless driver safety systems, as well as automotive automotive engine control systems.

The chip is also suitable for controlling mobile devices, digital devices like cameras and digital video recorder, LED lights, and digital TV. This versatile chip is a good underpinning for the digital media industry, wherein most of the electronics require high resolution and low power consumption. This chip’s low power consumption helps to create longer battery life and also reduce pollution.

Working Principle

The working principle of the LTC1197LIMS8#PBF is quite simple. When an analog voltage input is supplied to the chip, the linear oscillator generates a conversion clock which is used to trigger the internal A/D conversion. This conversion clock is then used to continuously sample the analog input voltage, divided through an internal divider, to an intermediate voltage range of 0.25V to 2.75V. This intermediate voltage is then used as the input for the internal DAC. The DAC output is then compared to the analog input voltage and the conversion results are stored in the internal register.

The reference voltage is used to calibrate the circuit and the internal register adjusts the reference voltage to a suitable level so as to obtain the best accuracy. The overall resolution of the ADC is 8-bits which allows the input voltage to be divided into 256 steps. The data acquired is then sent to the digital outputs which are used to drive the LEDs and other digital devices.

Conclusion

The LTC1197LIMS8#PBF ADC is a 384pin chip which is easily integrated into complex systems. Its low power consumption and high resolution make it an ideal choice for a wide array of applications. From monitoring systems to automotive systems, this chip offers great performance while also being RoHS compliant. The linear oscillator and internal register enable the chip to sample and store the input voltage levels with great precision which is essential for reproducing quality digital images, controlling LED lights, or for any other applications requiring quality data acquisition.

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