Part A
ACS724LLCTR-50AB-T
Allegro microsystèmes
- Lifecycle
- Active
- Stock
- 3779 PCS
- Package
- SOIC-8
- Series
- Capteur de courant
Replacement verdict
Compatible functional replacement candidate
The ACS724LLCTR-50AB-T is not a direct drop-in replacement for the ACS723LLCTR-05AB-T due to a significantly higher current sensing range and different package footprint, but it can serve as a functional substitute in applications where the wider measurement range is acceptable and the PCB layout is redesigned accordingly. Careful validation of sensitivity, isolation requirements, and mechanical dimensions is required before substitution.
Current Sensing Range
Validation required
Package Type
Not compatible
Output Type
High match
Supply Voltage
Validation required
Parts at a glance
Part B
ACS723LLCTR-05AB-T
Allegro microsystèmes
- Lifecycle
- Active
- Stock
- 5274 PCS
- Package
- SOIC-8
- Series
- Capteur de courant
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | ACS723LLCTR-05AB-T | ACS724LLCTR-50AB-T | Why it matters |
|---|---|---|---|
| Current Sensing Range | ±5 A | ±50 A | Defines the maximum measurable current; a 10x difference means the two parts are not functionally interchangeable for a given load range. |
| Sensitivity | 400 mV/A | 40 mV/A | Determines output voltage per amp of sensed current; different sensitivity requires different ADC scaling or signal conditioning. |
| Supply Voltage (Vcc) | 4.5 V to 5.5 V | 4.5 V to 5.5 V | Both operate from a 5 V nominal rail, so power supply compatibility is identical. |
| Output Type | Analog voltage, ratiometric | Analog voltage, ratiometric | Both provide a ratiometric analog output, so the interface type is the same for both devices. |
| Isolation Voltage | 2.1 kVrms | 2.1 kVrms | Galvanic isolation rating is identical, so safety and isolation performance are equivalent. |
| Bandwidth | 80 kHz | 120 kHz | Higher bandwidth allows faster current transient response; the ACS724 can track faster signals than the ACS723. |
| Package | SOIC-8 | SOIC-8 | Identical footprint and pinout allow drop-in PCB compatibility between the two parts. |
| Operating Temperature Range | -40 °C to 150 °C | -40 °C to 150 °C | Same temperature range means both are suitable for the same thermal environments. |
| Typical Accuracy | ±3% typical | ±2% typical | Tighter accuracy in the ACS724 improves measurement precision, which may matter in closed-loop control applications. |
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ACS724LLCTR-50AB-T | ACS723LLCTR-05AB-T |
|---|---|---|
| Part Status | Active | Active |
| For Measuring | AC/DC | AC/DC |
| Sensor Type | Hall Effect, Open Loop | Hall Effect, Open Loop |
| Current - Sensing | 50A | 5A |
| Number of Channels | 1 | 1 |
| Output | Ratiometric, Voltage | Ratiometric, Voltage |
| Sensitivity | 40mV/A | 400mV/A |
| Frequency | DC ~ 120kHz | DC ~ 80kHz |
| Linearity | ±1.5% | ±1% |
| Accuracy | ±0.8% | ±3% |
| Voltage - Supply | 4.5V ~ 5.5V | 5V |
| Response Time | 4µs | 5µs |
| Current - Supply (Max) | 14mA | 14mA |
| Operating Temperature | -40°C ~ 150°C | -40°C ~ 150°C |
| Polarization | Bidirectional | Bidirectional |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the primary differences between the ACS723LLCTR-05AB-T and ACS724LLCTR-50AB-T current sensors?
The ACS723LLCTR-05AB-T is a 5 A bidirectional current sensor, while the ACS724LLCTR-50AB-T is a 50 A bidirectional current sensor. Both are galvanically isolated Hall-effect sensors from Allegro MicroSystems, but they differ in primary sensed current range, sensitivity, and package thermal performance.
Are the ACS723LLCTR-05AB-T and ACS724LLCTR-50AB-T pin-to-pin compatible?
No. The ACS723LLCTR-05AB-T uses a small SOIC-8 package, while the ACS724LLCTR-50AB-T uses a larger SOIC-16 wide-body package. They have different pin counts, footprints, and PCB land patterns, so they are not drop-in replacements.
What is the sensitivity of each device?
The ACS723LLCTR-05AB-T has a nominal sensitivity of 400 mV/A. The ACS724LLCTR-50AB-T has a nominal sensitivity of 40 mV/A. These values are specified for the bidirectional variants with the given current ranges.
What supply voltage do these sensors require?
Both the ACS723LLCTR-05AB-T and ACS724LLCTR-50AB-T operate from a single 5 V supply. They are not 3.3 V devices; the LLCTR suffix indicates a 5 V supply and SOIC package option.
Can the ACS724LLCTR-50AB-T replace the ACS723LLCTR-05AB-T in an existing 5 A design?
Not directly. Although both are 5 V bidirectional sensors, the ACS724LLCTR-50AB-T has a much lower sensitivity (40 mV/A vs 400 mV/A) and a different package. Replacing the ACS723LLCTR-05AB-T would require redesigning the PCB footprint and recalibrating the signal conditioning to account for the reduced output swing per ampere.
What is the isolation voltage rating for these components?
Both the ACS723LLCTR-05AB-T and ACS724LLCTR-50AB-T are rated for basic isolation with a dielectric strength of 2.1 kVRMS for 1 minute per UL 60950-1 and 3 kVRMS for 1 minute per IEC 60950-1. These ratings are verified in the respective Allegro datasheets.
Which device is better suited for high-current motor control applications?
The ACS724LLCTR-50AB-T is better suited for high-current motor control because its 50 A primary sensing range and 40 mV/A sensitivity allow measurement of larger currents without saturating the output. The ACS723LLCTR-05AB-T is limited to 5 A and would saturate in such applications.
Do both sensors provide a ratiometric output?
Yes. Both the ACS723LLCTR-05AB-T and ACS724LLCTR-50AB-T provide a ratiometric analog output, meaning the output voltage scales proportionally with the supply voltage. This is a standard feature of Allegro's ACS72x family.