LTC2241IUP-12

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Analog to Digital Converters (ADCs) provide data acquisition systems with a bridge between signals originating in the physical world and digital data used by computational displays, storage, and equipment. The Texas Instruments LTC2241IUP-12 is an ADC integrated circuit which provides very low noise, high sampling rate precision conversion of analog signals while still attaining a high SNR and SFDR performance. This ADC chip is suitable for a variety of data acquisition applications, such as medical instrumentation, industrial and laboratory sensing, as well as broadcast and consumer audio, automotive applications, and many more.

The LTC2241IUP-12’s low noise characteristic allows for precision conversion of weak analog signals. It features a low offset and input referred noise of 65 nV, and has a high dynamic performance with a typical SNR of 82 dB and a SFDR of 94 dB. The chip also features a high-bandwidth of 1.2 MHz and a wide analog input range from –2.4V to +2.4V that provide for versatile and reliable sampling. An internal 17-bit Sigma-Delta ADC samples the input signal and converts it to digital outputs. The chip has a 4-channel multiplexer and can be configured for single-ended, differential, and pseudo-differential inputs.

As the ADC range is wide, the chipincludes an accurate and flexible wide-band reference source, which is programmable up to 16V and provides a low-noise, low-temperature drift voltage reference. The reference source also includes a precision resistor that can be used to adjust the reference voltage to the desired level. Additionally, the LTC2241IUP-12has a 0.1Hz low-power shutdown mode that can be controlled via an external pin. This makes it possible to reduce power consumption when the ADC is not in use, extending battery life in applications like portable medical diagnostics.

The LTC2241IUP-12 ADC can be monitored and programmed via the SPI interface or via direct control pins. Its short start-up time and robust temperatures range from –40°C to 125°C gives it an additional edge over many other ADC chips.The typical power consumption of the chip is 2.7 mW at a 5 V supply, with only 9 mW required for full conversion.

In conclusion, the LTC2241IUP-12 is a precise, low noise, high performance ADC option suitable for many data acquisition applications, with a wide range of configurable analog inputs, precision reference source, adjustable low power shutdown mode, fast start-up time and robust temperature range, as well as low power consumption compared to similar ADCs on the market.

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