LTC2489IDE#TRPBF

Analog To Digital Converters (ADC) Overview

The LTC2489IDE#TRPBF is a 16-bit, 4-channel (2 differential) delta-sigma ADC with an I2C interface. It features Easy Drive technology for automatic differential input current cancellation, 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 during conversion and 1µA in sleep mode. Key electrical specifications include 2ppm INL, 1ppm offset error, and simultaneous 50Hz/60Hz rejection. It utilizes an internal oscillator or external clock via the fO pin.

Analog To Digital Converters (ADC) Feature Summary

• Easy Drive Technology: Eliminates dynamic input current errors, allowing rail-to-rail inputs with zero differential input current.
• No Latency Architecture: Digital filter settles in a single cycle; the first conversion after channel selection is valid.
• I2C Interface: Supports standard/fast modes with 9 selectable addresses plus one global address.
• High Precision: 16-bit resolution with no missing codes, 2ppm INL, and 600nV RMS noise.

Analog To Digital Converters (ADC) Applications

• Data Acquisition Systems with Temperature Compensation
• Direct Sensor Digitizer
• Direct Temperature Measurement
• Industrial Process Control
• Instrumentation

Analog To Digital Converters (ADC) Procurement Notes

Verify the ordering suffix #TRPBF indicates tape and reel packaging. Confirm the IDE suffix corresponds to the industrial temperature range (-40°C to +85°C). Ensure the source document explicitly lists this part number as available from Analog Devices or authorized distributors. Check RoHS compliance status in the specific datasheet version.

Analog To Digital Converters (ADC) Selection Notes

Select the LTC2489IDE#TRPBF when multi-channel precision measurement is required with minimal external components. The Easy Drive feature simplifies interfacing with high-impedance sources like thermocouples or RTDs. Choose the 'I' grade for operation down to -40°C. Verify that the I2C bus speed requirements (up to 400kHz) are compatible with the system master controller.

Analog To Digital Converters (ADC) Part Context

This component belongs to the LTC2489 family of 16-bit delta-sigma ADCs. The 'IDE' designation specifies the industrial temperature range variant packaged in a 14-lead DFN. The '#TRPBF' suffix denotes the tape and reel packaging format with lead-free finish. It shares architectural similarities with other LTC24xx series devices but offers specific channel counts and interface options.

Analog To Digital Converters (ADC) Replacement Considerations

Publicly confirmed substitute part numbers are not provided in the verified source material. Consult Analog Devices marketing for alternative parts with wider operating temperature ranges or different package configurations.

Analog To Digital Converters (ADC) FAQ

How does the LTC2489 handle high source impedance?

It uses patented Easy Drive technology to automatically cancel differential input current, allowing direct connection of high-impedance sensors without external amplifiers or buffering.

What is the input common mode voltage range?

The analog inputs support a common mode range from GND to VCC, independent of the reference voltage, allowing rail-to-rail signal swing.

Does the device have latency between channel switching and valid data?

No, it has no latency. The digital filter settles in a single cycle, meaning the first conversion result after selecting a new channel is valid and accurate.