Part A
ACS723KMATR-20AB-T
Allegro MicroSystems
- Lifecycle
- Active
- Stock
- 4510 Stückzahl
- Package
- SOIC-W-16
- Series
- Stromsensoren
Replacement verdict
Compatible functional replacement candidate
The ACS722LLCTR-05AB-T and ACS723KMATR-20AB-T share the same Allegro current sensor family architecture, SOIC-8 package, and ratiometric analog output, making the ACS723KMATR-20AB-T a viable functional replacement candidate for the ACS722LLCTR-05AB-T in applications where the higher 20 A sensing range and extended temperature capability are acceptable. Designers must validate the increased current range, thermal performance, and isolation margin against the target application requirements before committing to the substitution.
Current Sensing Range
Validation required
Output Type
High match
Package Type
High match
Operating Temperature
Validation required
Parts at a glance
Part B
ACS722LLCTR-05AB-T
Allegro MicroSystems
- Lifecycle
- Active
- Stock
- 7660 Stückzahl
- Package
- SOIC-N-8
- Series
- Stromsensoren
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | ACS722LLCTR-05AB-T | ACS723KMATR-20AB-T | Why it matters |
|---|---|---|---|
| Current Sensing Range | ±5 A | ±20 A | Defines the maximum measurable current; a 4x difference means the two parts are not directly interchangeable for a given load current. |
| Sensitivity | 264 mV/A | 100 mV/A | Determines output voltage per amp of sensed current; different sensitivity requires recalibration of the downstream ADC or control loop. |
| Supply Voltage | 3.0 V to 3.6 V | 4.5 V to 5.5 V | The two devices operate on different supply rails, so they cannot be dropped into the same board without a supply change. |
| Isolation Voltage (Working) | 420 V RMS | 2100 V RMS | Higher isolation rating allows use in higher-voltage or safety-critical applications; the ACS723 offers substantially greater galvanic isolation. |
| Package | 8-SOIC | 16-SOIC | Different footprints and pin counts prevent direct PCB drop-in replacement without layout changes. |
| Operating Temperature Range | -40 °C to 150 °C | -40 °C to 125 °C | Affects suitability for high-temperature environments; the ACS722 supports a slightly wider upper limit. |
| Bandwidth | 80 kHz | 80 kHz | Determines the maximum frequency of current waveform that can be accurately sensed; both parts share the same bandwidth. |
| Output Type | Analog voltage, ratiometric | Analog voltage, ratiometric | Both provide a ratiometric analog output, so signal conditioning topology can be similar, though scaling differs. |
| Typical Supply Current | 10 mA | 10 mA | Affects power budget; both devices draw comparable quiescent current. |
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 | ACS723KMATR-20AB-T | ACS722LLCTR-05AB-T |
|---|---|---|
| Part Status | Active | Active |
| For Measuring | AC/DC | AC/DC |
| Sensor Type | Hall Effect, Open Loop | Hall Effect, Open Loop |
| Current - Sensing | 20A | 5A |
| Number of Channels | 1 | 1 |
| Output | Ratiometric, Voltage | Ratiometric, Voltage |
| Sensitivity | 100mV/A | 264mV/A |
| Frequency | DC ~ 80kHz | DC ~ 80kHz |
| Linearity | ±1% | ±1% |
| Accuracy | ±2% | ±3% |
| Voltage - Supply | 4.5V ~ 5.5V | 3V ~ 3.6V |
| Response Time | 5µs | 5µs |
| Current - Supply (Max) | 14mA | 12mA |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 150°C |
| Polarization | Bidirectional | Bidirectional |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the primary differences between the ACS722LLCTR-05AB-T and the ACS723KMATR-20AB-T?
The ACS722LLCTR-05AB-T is a 5 A bidirectional current sensor in a small SOIC-8 package, while the ACS723KMATR-20AB-T is a 20 A bidirectional current sensor in a larger SOIC-16 package. The ACS723 also offers higher isolation voltage and a different sensitivity range compared to the ACS722.
Are the ACS722LLCTR-05AB-T and ACS723KMATR-20AB-T pin-compatible?
No. The ACS722LLCTR-05AB-T uses an 8-pin SOIC package, whereas the ACS723KMATR-20AB-T uses a 16-pin SOIC package. They have different pin counts, pinouts, and PCB land patterns, so they are not drop-in replacements.
What is the current sensing range of each device?
The ACS722LLCTR-05AB-T has a bidirectional sensing range of ±5 A. The ACS723KMATR-20AB-T has a bidirectional sensing range of ±20 A. Both are factory-trimmed for accuracy over their respective ranges.
Do both devices provide galvanic isolation?
Yes. Both the ACS722 and ACS723 families provide galvanic isolation between the current-carrying path and the low-voltage signal side. The ACS723KMATR-20AB-T offers a higher isolation voltage rating than the ACS722LLCTR-05AB-T, making it suitable for applications requiring greater creepage and clearance.
What supply voltage do these sensors require?
Both the ACS722LLCTR-05AB-T and ACS723KMATR-20AB-T operate from a single 3.3 V supply. They are not 5 V-only devices, though the output swing is ratiometric to the supply voltage.
Which device is better for low-current precision measurement?
The ACS722LLCTR-05AB-T is generally better for low-current precision measurement because its ±5 A range provides higher sensitivity and better resolution for small currents. The ACS723KMATR-20AB-T is optimized for higher current levels up to ±20 A.
Can the ACS723KMATR-20AB-T replace the ACS722LLCTR-05AB-T in an existing design?
Not directly. The ACS723KMATR-20AB-T has a different package, pinout, sensitivity, and current range. A replacement would require a new PCB layout, verification of the output transfer function, and confirmation that the higher current range and different sensitivity meet the system requirements.
What are the typical applications for each sensor?
The ACS722LLCTR-05AB-T is typically used in low-power motor control, power supplies, and battery management where ±5 A sensing is sufficient. The ACS723KMATR-20AB-T is used in higher-power motor control, industrial inverters, and larger power supplies where ±20 A sensing and higher isolation are needed.