LMP93601NHZR

Analog Front End (AFE) Overview

The LMP93601 is a low-noise, high-gain analog front-end (AFE) designed for thermopile sensor arrays and mass flow sensors. It integrates a 16-bit Delta-Sigma ADC, a programmable gain amplifier (PGA), and an internal voltage reference. The device supports three differential EMI-hardened inputs with total gains up to 4096 V/V. Key electrical parameters include a typical input offset voltage of 1 µV, drift of 50 nV/°C, and input bias current of -1.3 nA. It operates on separate analog (2.7–5.5 V) and digital supplies with a consumption of 1.1 mA in conversion mode.

Analog Front End (AFE) Feature Summary

• Three differential EMI-hardened inputs with integrated EMIRR filters
• Programmable gain amplifier (PGA) with settings of 16x, 32x, 64x, and 128x
• 16-bit Sigma-Delta ADC with effective number of bits (ENOB) of 15.3
• Internal voltage reference and AVDD/3 common mode output generator

Analog Front End (AFE) Applications

• Thermopile array measurement
• Thermopile mass flow measurements
• Bridge sensor interface
• Gesture recognition

Analog Front End (AFE) Procurement Notes

Verify the specific ordering suffix 'NHZR' against the manufacturer's orderable addendum to confirm package type and tape/reel specifications. Ensure that the external clock frequency remains within the 3.6 MHz to 4.4 MHz range during implementation. Confirm that the IOVDD supply does not exceed the AVDD supply voltage.

Analog Front End (AFE) Selection Notes

Select this component for applications requiring high precision with very low input signals (1 µV to 600 µV). The device is suitable when low power consumption is critical, offering a shutdown current below 0.1 µA. Consider the WQFN-24 package constraints and the requirement for an external clock source when designing the system architecture.

Analog Front End (AFE) Part Context

The LMP93601 belongs to the LMP series of precision analog front-ends from Texas Instruments. It is specifically optimized for interfacing with MEMS thermopile arrays up to 16x16 resolution. The device simplifies signal conditioning by integrating amplification, filtering, and digitization into a single leadless package.

Analog Front End (AFE) Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Consult the manufacturer's product selection guide for alternative AFEs with similar channel counts and gain specifications.