LMP90098MHE/NOPB

Analog Front End (AFE) Overview

The LMP90098MHE/NOPB is a 24-bit, four-channel delta-sigma analog-to-digital converter (ADC) manufactured by Texas Instruments. It operates with single-ended inputs and supports sampling rates up to 214 samples per second. The device integrates programmable gain amplifiers (PGAs) and excitation current sources (iDACs), eliminating the need for external signal conditioning components in sensor applications. It functions within an analog supply voltage range of 2.85 V to 5.5 V and a digital supply range of 2.7 V to 5.5 V. The component communicates via an SPI interface and is housed in a 28-lead HTSSOP package, designed for operation between -40°C and +125°C.

Analog Front End (AFE) Feature Summary

• 24-bit resolution with 4 independent channels and sigma-delta architecture
• Integrated programmable gain amplifiers (PGA) and excitation current sources (iDACs)
• Low power consumption of 1.2 mW with SPI serial interface
• Wide operating temperature range from -40°C to +125°C

Analog Front End (AFE) Applications

• Industrial process control systems requiring high-precision multi-channel sensing
• RTD and thermocouple measurement modules
• Strain gauge and load cell instrumentation
• Pressure sensor signal acquisition

Analog Front End (AFE) Procurement Notes

Verify RoHS compliance status through official manufacturer documentation before integration. Confirm humidity sensitivity handling requirements during storage and assembly. Ensure the HTSSOP-28 package dimensions match the target PCB footprint. Validate that the 2.7 V to 5.5 V digital supply range aligns with the system logic levels.

Analog Front End (AFE) Selection Notes

Select this component when high-resolution, low-speed multi-channel acquisition is required without external PGA circuitry. The integrated iDACs simplify RTD excitation designs. Compare against other LMP9009x variants if differential input configurations or different channel counts are needed. Verify that the 214 S/s maximum data rate meets the application's bandwidth requirements.

Analog Front End (AFE) Part Context

This part belongs to the LMP90098 series of precision sensor AFEs. It is distinct from development tools like the LMP90100EB/NOPB. The suffix /NOPB indicates lead-free construction compliant with RoHS standards. It serves as a direct replacement for older discrete ADC and amplifier solutions in compact industrial sensors.

Analog Front End (AFE) Replacement Considerations

Check for pin-compatible alternatives within the LMP9009x family if different channel counts or input types are required. Verify that any substitute maintains the 24-bit resolution and integrated iDAC functionality.