Linear Technology LTC2446CUHF Ultra High Precision, 24-Bit, No Latency ΔΣ ADCs with Easy Drive Input Current Cancellation

The LTC2446CUHF from Linear Technology is a high-precision, 24-bit, no latency ΔΣ (Delta-Sigma) analog-to-digital converter (ADC) that offers exceptional performance with easy drive input current cancellation. This product is part of a family of ADCs that provide an array of speed/resolution trade-offs while maintaining a high degree of accuracy and noise performance, making it suitable for a wide range of high-resolution measurement applications.

One of the standout features of the LTC2446CUHF is its no latency ΔΣ architecture, which ensures that there is no delay in the digital output after a conversion. This makes the device ideal for multiplexed applications where a fast channel-to-channel switching time is critical. The converter operates at a conversion rate of up to 200 samples per second (7.5Hz to 200Hz programmable rate) and includes a digital filter that simultaneously rejects 50Hz and 60Hz at a 16.67Hz output rate, making it highly suitable for industrial, automotive, and medical applications where electrical noise is prevalent.

Another significant advantage of the LTC2446CUHF is its Easy Drive technology, which greatly reduces the required drive strength of the external buffer. This technology cancels out the ADC's input current, allowing the ADC to directly digitize high impedance sensors without compromising measurement accuracy. This feature simplifies the design of sensor interfaces and reduces power consumption.

The device also features a wide input common-mode range that does not affect the input current, providing further flexibility in sensor interfacing. Its differential inputs are designed for direct high impedance sensor connection, which, along with its integrated oscillator, require no external components to perform conversions.

The LTC2446CUHF is packaged in a 38-lead QFN package and operates over the industrial temperature range. Its compact form factor, combined with its advanced features, makes it an excellent choice for engineers looking to integrate high-resolution data acquisition into their designs with minimal external circuitry and maximum performance.

For detailed specifications, application notes, and support documentation, designers are encouraged to consult the official Linear Technology product datasheet and user guides.