LTC2449IUHF#PBF

Analog To Digital Converters (ADC) Overview

The LTC2449IUHF#PBF is a 16-channel (8 differential), 24-bit, high-speed delta-sigma analog-to-digital converter in a 38-lead QFN package. It features no latency conversion, allowing accurate results immediately after channel selection. The device supports selectable speed/resolution combinations via a serial interface, with output rates up to 8kHz and noise as low as 200nVRMS at 13.8Hz. It includes MUXOUT/ADCIN pins for external buffering or gain, ensuring high input impedance. Operating on a single 4.5V to 5.5V supply, it offers guaranteed modulator stability and autosleep functionality for low power consumption.

Analog To Digital Converters (ADC) Feature Summary

• 16 Single-Ended or 8 Differential Input Channels
• 24-Bit Resolution with No Latency Mode
• Selectable Speed/Resolution (Up to 8kHz Output Rate)
• MUXOUT/ADCIN Pins for External Buffering

Analog To Digital Converters (ADC) Applications

• High Speed Multiplexing
• Weight Scales
• Auto Ranging 6-Digit DVMs
• Direct Temperature Measurement

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix #PBF indicates lead-free finish and tube packaging. Confirm the 'I' grade designation matches the required operating temperature range of –40°C to 85°C. Ensure the IUHF package type aligns with PCB footprint requirements. Check for RoHS compliance documentation if mandated by local regulations.

Analog To Digital Converters (ADC) Selection Notes

Select the LTC2449 over the LTC2448 specifically when external buffering or gain stages are required between the multiplexer and ADC input, utilizing the dedicated MUXOUT and ADCIN pins. Choose this model for applications demanding high input impedance isolation. Verify that the 16-channel capacity meets system requirements compared to the 8-channel variants.

Analog To Digital Converters (ADC) Part Context

This component belongs to the LTC2444/LTC2445/LTC2448/LTC2449 family of high-speed, no-latency delta-sigma ADCs. The LTC2449 variant is distinguished by its 16-channel capability and the inclusion of MUXOUT/ADCIN pins, which facilitate the integration of external buffer amplifiers or gain blocks without compromising the internal calibration performance.

Analog To Digital Converters (ADC) Replacement Considerations

LTC2448IUHF#PBF: Identical specifications except lacks MUXOUT/ADCIN pins; suitable if external buffering is not needed. LTC2445IUHF#PBF: Similar feature set but limited to 8 channels (4 differential). LTC2444IUHF#PBF: 8-channel version without external buffering support.