LTC2497CUHF#PBF

Analog To Digital Converters (ADC) Overview

The LTC2497CUHF#PBF is a 16-bit, 8-channel differential or 16-channel single-ended delta-sigma ADC with an I²C interface. It features Easy Drive technology for zero differential input current, enabling direct digitization of high-impedance sensors without external buffers. The device operates on a single supply from 2.7V to 5.5V, consuming 0.8mW. Key specifications include 2ppm INL, 1ppm offset error, and simultaneous 50Hz/60Hz rejection. It utilizes a 38-lead 5mm × 7mm QFN package and includes an internal oscillator for clock generation.

Analog To Digital Converters (ADC) Feature Summary

• Easy Drive Technology: Eliminates dynamic input current errors, allowing direct connection of high-impedance sensors and rail-to-rail inputs.
• No Latency Architecture: Digital filter settles in a single cycle, providing valid data immediately after channel selection.
• High Accuracy: Features 2ppm Integral Nonlinearity (INL), 1ppm offset error, and 600nV RMS output noise.
• Simultaneous Line Rejection: Automatically rejects both 50Hz and 60Hz line frequencies.

Analog To Digital Converters (ADC) Applications

• Direct Sensor Digitizer
• Direct Temperature Measurement
• Instrumentation
• Industrial Process Control

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix #PBF indicates lead-free finish and tape/reel packaging options (#TRPBF). Confirm the 'C' grade corresponds to the 0°C to 70°C operating temperature range. Ensure the 38-lead QFN footprint matches the PCB design requirements.

Analog To Digital Converters (ADC) Selection Notes

Select this component for applications requiring multi-channel acquisition with minimal signal conditioning. The Easy Drive feature simplifies designs by removing the need for input amplifiers. Choose the 'I' grade variant if operation below 0°C or above 70°C is required.

Analog To Digital Converters (ADC) Part Context

This part belongs to the LTC2497 family of 16-bit delta-sigma ADCs. The CUHF#PBF designation specifies the commercial temperature range (0°C to 70°C) and the 38-lead plastic QFN package. It shares the core architecture with the industrial grade LTC2497IUHF#PBF.

Analog To Digital Converters (ADC) Replacement Considerations

The LTC2497IUHF#PBF is the industrial temperature grade equivalent. Other parts in the series include the LTC2496 and LTC2499, which offer different resolutions or channel counts but share similar interface characteristics.

Analog To Digital Converters (ADC) FAQ

How does Easy Drive technology benefit sensor interfacing?

It automatically cancels differential input current, allowing high-impedance sensors and large external RC networks to be connected directly without external buffering amplifiers.

What is the input common mode voltage range?

The analog inputs support a common mode range from GND – 0.3V to VCC + 0.3V, independent of the reference voltage.

Does the device require an external clock?

No, it includes an integrated oscillator. An external clock can be applied to the fO pin to override the internal rate if needed.