LTC2493CDE#PBF

Analog To Digital Converters (ADC) Overview

The LTC2493CDE#PBF is a 24-bit, 4-channel (2 differential) delta-sigma ADC featuring Easy Drive technology and an I2C interface. It eliminates dynamic input current errors via automatic differential input current cancellation, enabling direct digitization of high-impedance sensors with rail-to-rail inputs. The device operates on a single supply from 2.7V to 5.5V, consuming 0.8mW at normal speed. Key electrical parameters include 600nV RMS noise, 2ppm INL, and 1ppm offset error. It supports programmable 50Hz, 60Hz, or simultaneous 50Hz/60Hz rejection modes and includes an integrated temperature sensor with 1/30th °C resolution.

Analog To Digital Converters (ADC) Feature Summary

• Easy Drive Technology: Automatic cancellation of differential input current allows direct connection of high-impedance sensors without external buffering.
• No Latency Architecture: Digital filter settles in a single cycle; the first conversion after channel selection is valid and accurate.
• I2C Interface: 2-wire serial communication with 9 selectable addresses plus one global address for synchronization.
• Integrated Temperature Sensor: Provides 1/30th °C resolution and 2°C absolute accuracy for system monitoring.

Analog To Digital Converters (ADC) Applications

• Data acquisition systems requiring temperature compensation
• Direct sensor digitization for high-impedance sources
• Instrumentation applications
• Industrial process control systems

Analog To Digital Converters (ADC) Procurement Notes

Verify the ordering suffix #PBF indicates lead-free finish and tube packaging. Confirm the 'C' grade specifies an operating temperature range of 0°C to 70°C. Ensure the DFN-14 package dimensions match the PCB footprint requirements. Check for RoHS compliance documentation if required by specific manufacturing standards.

Analog To Digital Converters (ADC) Selection Notes

Select this component when high DC accuracy is required for high-impedance signals without external amplifiers. Choose the CDE variant for commercial temperature ranges (0°C to 70°C); use the IDE variant for industrial ranges (-40°C to 85°C). Consider the 2x speed mode option if higher data rates are needed, noting the trade-off in power consumption and noise performance compared to the standard 15 Sps operation.

Analog To Digital Converters (ADC) Part Context

This part belongs to the LTC2493 family of 24-bit delta-sigma ADCs. The CDE designation specifically identifies the commercial temperature grade (0°C to 70°C) housed in a 14-lead, 4mm x 3mm plastic DFN package. It is functionally identical to the IDE variant except for the extended temperature range specification.

Analog To Digital Converters (ADC) Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Consult Analog Devices marketing for parts specified with wider operating temperature ranges or alternative package options.