LTC2448IUHF#PBF

Analog To Digital Converters (ADC) Overview

The LTC2448IUHF#PBF is a 24-bit, 16-channel (8-differential) delta-sigma analog-to-digital converter in a 38-lead QFN package. It operates on a 4.5V to 5.5V supply with an internal oscillator and supports selectable speed/resolution combinations via a 4-wire serial interface. Key electrical parameters include up to 8kHz output rate, 2µVRMS noise at 1.76kHz, and <5µV offset error. The device features no latency mode for immediate accurate data after channel selection.

Analog To Digital Converters (ADC) Feature Summary

• 16 single-ended or 8 differential input channels with GND to VCC common mode range
• Selectable speed/resolution with up to 8kHz output rate and 20µA autosleep current
• No latency mode ensures conversion accuracy immediately after new channel selection
• Internal oscillator eliminates need for external timing components

Analog To Digital Converters (ADC) Applications

• High speed multiplexing systems
• Weight scales
• Auto ranging 6-digit DVMs
• Direct temperature measurement

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix #PBF indicates tube packaging versus #TRPBF for reel packaging. Confirm the 'I' grade corresponds to the –40°C to 85°C operating range. Check for end-of-life status as some distributors list this component as obsolete or transitioning.

Analog To Digital Converters (ADC) Selection Notes

Select the LTC2448 over LTC2444 for 16-channel single-ended or 8-channel differential applications. Choose the IUHF variant for industrial temperature ranges. Ensure external reference voltage is within 0.1V to VCC limits. Verify serial interface compatibility with host microcontroller logic levels.

Analog To Digital Converters (ADC) Part Context

Part of the LTC2444/LTC2445/LTC2448/LTC2449 family of high-speed 24-bit ADCs. Shares identical pinout and functionality with LTC2449 except for the MUXOUT/ADCIN pins present in the latter. Uses proprietary delta-sigma architecture for variable speed/resolution without settling time penalties.

Analog To Digital Converters (ADC) Replacement Considerations

LTC2449IUHF#PBF offers identical performance with added MUXOUT/ADCIN pins for external buffering. LTC2444 series provides similar specs but with only 8 single-ended or 4 differential channels.