LTC2480HDD#TRPBF

Analog To Digital Converters (ADC) Overview

The LTC2480HDD#TRPBF is a 16-bit delta-sigma analog-to-digital converter featuring Easy Drive technology for automatic differential input current cancellation. It supports a single supply voltage of 2.7V to 5.5V and offers programmable gain from 1 to 256 in eight steps. The device provides rail-to-rail input common mode range (GND to VCC) independent of the reference voltage, which can be as low as 100mV. Key electrical specifications include 2ppm INL with no missing codes, 1ppm offset error, and selectable line frequency rejection for 50Hz, 60Hz, or simultaneous 50Hz/60Hz. It operates within an extended temperature range of –40°C to 125°C.

Analog To Digital Converters (ADC) Feature Summary

• Easy Drive Technology eliminates dynamic input current errors, enabling direct digitization of high-impedance sensors with rail-to-rail inputs.
• Programmable gain ranges from 1 to 256, allowing flexible signal conditioning for various sensor types.
• Integrated on-chip trimmed oscillator removes the need for external crystals, supporting both internal and external clock sources.
• Selectable line frequency rejection modes for 50Hz, 60Hz, or simultaneous 50Hz/60Hz noise suppression.

Analog To Digital Converters (ADC) Applications

• Direct sensor digitizers requiring high accuracy
• Weight scales and load cell measurements
• Strain gauge transducers
• Industrial process control instrumentation
• Digital voltmeters and precision meters

Analog To Digital Converters (ADC) Procurement Notes

Verify the H-grade suffix indicates the –40°C to 125°C operating temperature range. Confirm the DD package designation corresponds to the 10-lead (3mm × 3mm) plastic DFN form factor. Ensure the TRPBF suffix denotes tape and reel packaging with lead-free finish. Cross-reference the specific lot date code against project requirements if long-term availability is critical.

Analog To Digital Converters (ADC) Selection Notes

Select this component when interfacing with high-source-impedance sensors that require zero differential input current to maintain DC accuracy. Choose the 2x speed mode if higher data rates are needed, noting the gain limit reduces to 128. Ensure the reference voltage is compatible with the 0.1V to VCC range. Verify that the 4-wire SPI interface timing meets the system controller's capabilities.

Analog To Digital Converters (ADC) Part Context

This part belongs to the LTC2480 family of 16-bit delta-sigma ADCs. The HDD variant specifically designates the industrial extended temperature grade housed in a compact 10-lead DFN package. It shares functional similarities with other members like the LTC2485 but differs in resolution and interface specifics.

Analog To Digital Converters (ADC) Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Evaluate alternatives based on pin compatibility, resolution, and input current cancellation features.

Analog To Digital Converters (ADC) FAQ

How does Easy Drive technology benefit high-impedance sensors?

It automatically cancels differential input current, eliminating dynamic input current errors and allowing large external source impedances to be directly digitized without buffering.

What is the input common mode range?

The input common mode range extends from GND to VCC, independent of the reference voltage level.

Can the LTC2480 measure its own temperature?

Yes, the device includes an on-chip internal temperature sensor that can be selected via the serial data input (SDI) pin.