LTC2291IUP#TRPBF

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The LTC2291IUP#TRPBF is an analog to digital converter (ADC) geared towards the data acquisition industry (DAQ). It offers a highly integrated precision, 24-bit delta-sigma ADC with a serial I/O. It is available in both an 8-bit and a 10-bit resolution configuration.

Features

• On-Chip Programmable Gain Amplifier (PGA) with ranges of 600mV, 1V, and 5V.
• On-chip Sample and Hold Amplifier (SHA) with differential amplified inputs.
• Precision voltage reference with conversions times as low as 1.0ms.
• Low power mode for use in ultra-low power and battery operated system.
• 8- and 10-bit output formats for increased resolution.
• Pin compatible with the popular LTC2250 family of ADCs.

Applications

The LTC2291IUP#TRPBF offers an ideal solution for precision, low power data acquisition. Its on-chip programmable gain amplifier and sample and hold amplifier make it perfect for scientific and laboratory use. It is also suitable for a wide range of industrial applications such as industrial controllers, medical and automotive systems.

It is also suitable for applications that require highly accurate measurements even in noise environments. With its 8-bit and 10-bit output formats, it provides accuracy and precision in low power applications ensuring higher signal-to-noise ratio, successfully eliminating noise from interfering with measurements.

Working Principle

At its core, the LTC2291IUP#TRPBF consists of an ADC utilizing the delta-sigma modulator topology. This topology is based on a model that uses loop filtering and oversampling, which produces an analog output which is proportional to the analog input signal.

The ADC begins with the analog signal being passed through a sample and hold amplifier, where it is then converted to digital values by an internal 24-bit sigma-delta converter. Depending on the user’s requirement, 8-bit or 10-bit resolution might be chosen. This converted signal is then filtered and passed through a programmable gain amplifier and fed back to the ADC.

The resulting signal is then digitized to one of the two resolution formats - an 8-bit output code resulting in 256 codes or a 10-bit output code producing 512 codes. It is important to note that the 8-bit output code is the default resolution setting and does not require any configuration. However, for the 10-bit resolution setting, the resolution must be set by software configuration.

In summary, the LTC2291IUP#TRPBF ADC is ideal for precision low power data acquisition applications. With its wide range of features, it offers maximum flexibility while ensuring accurate measurements in noise environments. In addition, its 8-bit and 10-bit output format offers higher accuracy and resolution.

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