ACS715LLCTR-20A-T Current Sensor Equivalent & Substitute Parts

Part Overview

The ACS715LLCTR-20A-T is a Hall Effect current sensor manufactured by Allegro MicroSystems, designed for DC current measurement up to 20A in open-loop unidirectional configuration. This component delivers ratiometric voltage output with 185mV/A sensitivity and operates across -40°C to 150°C temperature range in an 8-SOIC surface mount package.

The ACS715LLCTR-20A-T carries a "Not For New Designs" product status, indicating discontinuation or phase-out from the manufacturer. Identifying qualified substitute components is necessary for ongoing production support, design refresh cycles, and long-term supply chain continuity.

Substiute Parts

ACS715LLCTR-20A-T

Allegro MicroSystemsIn Stock: 1661ACS715LLCTR-20A-T Datasheet

Current PartRFQ

ACS724LLCTR-20AU-T

Allegro MicroSystemsIn Stock: 2636ACS724LLCTR-20AU-T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ACS715LLCTR-20A-T is determined by the following critical parameters:

Mandatory Matching Criteria:

• Current sensing range: 20A
• Sensor technology: Hall Effect, Open Loop
• Output configuration: Ratiometric, Voltage
• Package type: 8-SOIC (0.154", 3.90mm Width)
• Mounting type: Surface Mount
• Polarization: Unidirectional
• Operating temperature range: -40°C ~ 150°C minimum
• RoHS3 compliance

Allowable Parameter Variations:

• Sensitivity: May vary within ±15% of original specification
• Frequency response: May exceed original specification
• Accuracy: May improve (lower tolerance values acceptable)
• Linearity: May improve (lower tolerance values acceptable)
• Supply voltage: May have wider operating range
• Response time: May vary
• Current supply: May vary

The ACS724LLCTR-20AU-T qualifies as a direct substitute based on matching all mandatory criteria while offering improved performance specifications in accuracy and frequency response.

Parameter Comparison

Engineering Selection Recommendations

The ACS724LLCTR-20AU-T is the qualified substitute for the ACS715LLCTR-20A-T based on the following engineering factors:

Product Status Alignment: The ACS724LLCTR-20AU-T carries Active product status, ensuring continued manufacturer support, availability, and compliance updates. The original ACS715LLCTR-20A-T is designated "Not For New Designs," making transition to an active component necessary for long-term supply chain stability.

Compliance Certification: Both components maintain ROHS3 compliance and REACH Unaffected status, satisfying regulatory requirements for electronics manufacturing and distribution.

Performance Enhancement: The substitute provides improved accuracy specification (±0.7% versus ±1.5%) and extended frequency response capability (120kHz versus 80kHz), delivering superior measurement precision without compromising functional compatibility.

Package and Mounting Compatibility: Identical 8-SOIC package dimensions and surface mount configuration ensure direct PCB layout compatibility without redesign requirements.

Frequently Asked Questions (FAQ)

Q: Can the ACS724LLCTR-20AU-T be used as a direct replacement on existing PCBs designed for the ACS715LLCTR-20A-T?

A: Yes. Both components share identical 8-SOIC package dimensions (0.154", 3.90mm width) and surface mount configuration. Pin-to-pin compatibility and footprint alignment are maintained, allowing direct substitution without PCB layout modification.

Q: What are the key differences in electrical performance between these two sensors?

A: The ACS724LLCTR-20AU-T provides higher sensitivity (200mV/A versus 185mV/A), improved accuracy (±0.7% versus ±1.5%), and extended frequency response (120kHz versus 80kHz). Supply voltage tolerance is also wider (4.5V ~ 5.5V versus fixed 5V). These represent performance improvements rather than functional changes.

Q: Are there any supply voltage considerations when substituting these components?

A: The original ACS715LLCTR-20A-T requires a fixed 5V supply. The substitute ACS724LLCTR-20AU-T accepts 4.5V ~ 5.5V, providing greater supply voltage tolerance. Existing 5V supply designs require no modification.

Q: Do both sensors maintain the same operating temperature range?

A: Yes. Both components operate across -40°C ~ 150°C, ensuring thermal performance compatibility across industrial and automotive applications.

Q: What is the significance of the "Not For New Designs" status on the original part?

A: This designation indicates the manufacturer has discontinued active development and support for the ACS715LLCTR-20A-T. Transitioning to the active ACS724LLCTR-20AU-T ensures access to current manufacturing processes, compliance updates, and long-term availability.

Q: Are there any sensitivity differences that would require firmware or calibration adjustments?

A: The sensitivity difference (200mV/A versus 185mV/A) represents an 8.1% increase. Applications using analog-to-digital conversion or signal conditioning may require recalibration of measurement scaling factors to maintain measurement accuracy.