LTC2497CUHF#PBF

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The LTC2497CUHF#PBF is a dual-channel, voltage-input, high-precision Analogue to Digital Converter (ADC) with a low power design, high resolution and very good linearity. It is ideal for sampling signals in medical and portable instrumentation applications, as well as for industrial process control and general-purpose data acquisition. The ADC combines two independent, Sigma-Delta modulator structures, so as to minimise the number of external components required. As such, it is a very cost-effective device suitable for a wide variety of analogue conversion applications which require high performance and reliability.

The LTC2497CUHF#PBF has two channels, each with a sampling range of ±2.5V, so it is able to sample both positive and negative voltages. This wide dynamic range allows for the input signals to be accurately measured, and the differential inputs ensure that common-mode rejection can be achieved. The on-chip samples and holds, as well as track-and-hold circuits, mean that fluctuations in the input signal can be accurately monitored and tracked. The ADC is typically configured to have an effective resolution of 24 bits over its sampling range, which results in a high SNR and provides excellent linearity performance.

In terms of power consumption, the LTC2497CUHF#PBF has been designed to be as efficient as possible. It runs off of a single supply (2.7V to 5.5V), and draws less than 6mA while in shutdown mode. The design also employs an Auto-Power-down functionality, which automatically turns off the device when no data is being converted, further increasing its power efficiency.

The most important application field of the LTC2497CUHF#PBF is in medical and portable instrumentation as well as data acquisition for industrial use. Its small size and low power consumption make it particularly desirable for these applications. Additionally, the ADC is ideal for use in automotive applications, where its excellent linearity performance is particularly well-suited for analogue signal sampling. In instrumentation applications, the ADC can be used for real-time data acquisition, performance monitoring and security systems, as well as assessing and recording system performance.

In terms of its working principle, the LTC2497CUHF#PBF uses a differential sample and hold circuit, which is followed by a Sigma-Delta modulator. The sample and hold circuit captures the input signal and holds it for conversion, then the Sigma-Delta modulator is used to convert the analogue charge into a digital result. A high speed clock is used to synchronise the two circuits, and then the output is read off as a binary word. The data word is of a format determined by the ADC user, and this binary word is then processed further by converting it to a linear representation of the input signal voltage.

The LTC2497CUHF#PBF is one of the leading high-precision ADCs on the market. With its wide sampling range, excellent noise immunity, low power consumption and excellent linearity, its versatile range of applications makes it a very attractive option for medical and instrumentation, as well as industrial and automotive applications. As such, it provides designers with an efficient and cost-effective solution to their analogue signal sampling needs.

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