LTC2461CMS#PBF

The LTC2461CMS#PBF is a low power, high accuracy, 24-bit analog-to-digital converter with Serial Peripheral Interface (SPI). The LTC2461CMS#PBF is designed for a wide range of applications, including monitoring of analog signals with high signal-to-noise ratios. It is based on a Delta-Sigma modulator, which allows for reduced power consumption and fast response time. The 24-bit resolution allows for measurements with a resolution of up to 20μV (~18 bits).

It offers programmable gain options, allowing the user to select the optimal gain to match the signal range to the maximum resolution available. The LTC2461CMS#PBF has a wide range of operating voltages, from 2.7V to 5.5V and is available in 8-lead MSOP and a 3 mm x 3 mm QFN packages for space-constrained applications.

It is ideal for temperature, strain, and pressure measurements and monitoring applications. The LTC2461CMS#PBF can be used in medical and industrial process control, motor control and power supply design, as well as any general purpose precision data acquisition applications.

Working Principle

The LTC2461CMS#PBF uses a ΔΣ modulator architecture to convert the analog input signal into a 24-bit digital output. The modulator converts the analog input signal into a high sample rate stream of pulses, which are then filtered and decimated to the desired resolution. This modulator architecture allows the user to select a sampling rate and resolution that matches the input signal bandwidth and dynamic range.

The LTC2461CMS#PBF is a single ended device, allowing the user to directly measure bipolar signals without requiring an external reference voltage or an additional buffer amplifier as is required with a differential ADC. The LTC2461CMS#PBF also features overload protection, which ensures that the input signal is clipped if it exceeds the voltage range specified in the datasheet.

The user can also program the LTC2461CMS#PBF with software for different gains, allowing for optimal use within the desired dynamic range of the input signal. The device can also operate in a power down mode that reduces the current consumption to below 1μA, and a standby mode that reduces the power consumption by up to 99%.

Conclusion

The LTC2461CMS#PBF is a low power, high accuracy 24-bit analog to digital converter that is ideal for temperature, strain, pressure, and other precision measurement applications. It features an integrated ΔΣ modulator architecture, allowing the user to choose a resolution and sample rate that matches the input signal, as well as a wide range of programmable gain options. The power-down and standby modes make it ideal for energy-saving applications. The LTC2461CMS#PBF is available in 8-lead MSOP and a 3 mm x 3 mm QFN packages, making it ideal for space constrained applications.