MLX91221KDC-ABF-025-RE

Current Sensors Overview

The MLX91221KDC-ABF-025-RE is a second-generation isolated integrated current sensor manufactured by Melexis Technologies NV. It utilizes Hall effect technology to measure AC and DC currents with a maximum sensing capacity of 25A. The device features a bidirectional polarization and provides an analog ratiometric output voltage with a sensitivity of 25mV/A. Operating within a frequency range of DC to 300kHz, it offers a linear accuracy of ±0.6% and a response time of 2µs. Powered by a supply voltage between 3.135V and 3.465V, the sensor draws a maximum supply current of 26mA. It is housed in an 8-SOIC package (0.154", 3.90mm width) and supports surface mount installation across a wide operating temperature range of -40°C to 125°C.

Current Sensors Feature Summary

• Factory trimmed for high precision AC and DC current measurement
• Provides analog ratiometric or fixed output voltage options
• Integrates sensing element and signal processing on a single chip

Current Sensors Applications

• Motor control systems
• Power supply monitoring
• Industrial automation equipment

Current Sensors Procurement Notes

Verify the specific suffix RE indicates Tape & Reel packaging when ordering. Confirm the 8-SOIC package dimensions match the target PCB footprint. Ensure the 25A current rating aligns with the application's peak load requirements. Check moisture sensitivity level (MSL 3) handling procedures during assembly. Validate that the ratiometric output interface is compatible with the downstream ADC input range.

Current Sensors Selection Notes

Select this component for applications requiring galvanic isolation and high-speed current feedback. The 8-SOIC package offers a compact form factor suitable for space-constrained designs. The ratiometric output simplifies interface design by eliminating the need for a separate reference voltage source. Consider the 300kHz bandwidth if high-frequency switching noise rejection is critical. Evaluate thermal management needs given the 125°C maximum operating temperature limit.

Current Sensors Part Context

This part belongs to the MLX91221 series of second-generation isolated integrated current sensors from Melexis. The series is designed to replace traditional transformer-based solutions with solid-state alternatives. The KDC variant specifically denotes the 8-SOIC package configuration. The ABF suffix typically relates to factory-trimmed specifications for linearity and offset. This generation improves upon previous models with enhanced integration and reduced external component count.

Current Sensors Replacement Considerations

MLX91221KDC-ABR-050-RE: Offers 50A sensing capability but differs in sensitivity and package width. MLX91221KDF-ABF-025-RE: Uses a wider 16-SOIC package, requiring PCB layout adjustments. Verify pinout compatibility and electrical parameter alignment before substitution.