Part A
ACS722LLCTR-05AB-T
Allegro MicroSystems
- Lifecycle
- Active
- Stock
- 7660 PCS
- Package
- SOIC-N-8
- Series
- Current Sensors
Replacement verdict
Compatible functional replacement candidate
The ACS722LLCTR-05AB-T is not a direct drop-in replacement for the ACS723LLCTR-10AU-T due to differences in current sensing range, output type, and package construction, but it can serve as a functional substitute in lower-current applications where unidirectional sensing and reduced isolation requirements are acceptable. Design validation is required to confirm compatibility with the target circuit.
Current Sensing Range
Validation required
Output Type
Not compatible
Package Type
Validation required
Supply Voltage
High match
Parts at a glance
Part B
ACS723LLCTR-10AU-T
Allegro MicroSystems
- Lifecycle
- Active
- Stock
- 7218 PCS
- Package
- SOIC-8
- Series
- Current Sensors
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-10AU-T | ACS722LLCTR-05AB-T | Why it matters |
|---|---|---|---|
| Current Sensing Range | ±10 A | ±5 A | Defines the maximum measurable current; a smaller range limits the load the sensor can monitor directly. |
| Sensitivity | 400 mV/A | 264 mV/A | Determines output voltage change per amp; higher sensitivity improves resolution at low currents. |
| Supply Voltage | 4.5 V to 5.5 V | 3.0 V to 3.6 V | Must match the system rail; incompatible supply voltages prevent direct substitution. |
| Output Type | Analog voltage, ratiometric | Analog voltage, ratiometric | Both provide ratiometric analog output, but the different supply voltages affect the output scaling. |
| Isolation Voltage | 2400 Vrms | 2400 Vrms | Provides galvanic isolation between the current path and signal circuitry for safety. |
| Bandwidth | 80 kHz | 80 kHz | Sets the maximum signal frequency the sensor can accurately track. |
| Operating Temperature Range | -40°C to 150°C | -40°C to 150°C | Ensures reliable operation across the intended environmental conditions. |
| Package | 8-SOIC | 8-SOIC | Footprint and pinout compatibility are required for drop-in replacement on a PCB. |
| Accuracy | ±3% typical | ±3% typical | Affects measurement precision and system calibration requirements. |
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 | ACS722LLCTR-05AB-T | ACS723LLCTR-10AU-T |
|---|---|---|
| Part Status | Active | Active |
| For Measuring | AC/DC | DC |
| Sensor Type | Hall Effect, Open Loop | Hall Effect, Open Loop |
| Current - Sensing | 5A | 10A |
| Number of Channels | 1 | 1 |
| Output | Ratiometric, Voltage | Ratiometric, Voltage |
| Sensitivity | 264mV/A | 400mV/A |
| Frequency | DC ~ 80kHz | DC ~ 80kHz |
| Linearity | ±1% | ±1% |
| Accuracy | ±3% | ±3% |
| Voltage - Supply | 3V ~ 3.6V | 5V |
| Response Time | 5µs | 5µs |
| Current - Supply (Max) | 12mA | 14mA |
| Operating Temperature | -40°C ~ 150°C | -40°C ~ 150°C |
| Polarization | Bidirectional | Unidirectional |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the primary differences between the ACS723LLCTR-10AU-T and the ACS722LLCTR-05AB-T?
The ACS723LLCTR-10AU-T is a 10 A unidirectional current sensor with a 400 mV/A typical sensitivity, while the ACS722LLCTR-05AB-T is a 5 A bidirectional current sensor with a 264 mV/A typical sensitivity. The ACS723 device measures current in one direction only, whereas the ACS722 device measures both positive and negative current around zero.
Do the ACS723LLCTR-10AU-T and ACS722LLCTR-05AB-T use the same package and pinout?
Yes. Both devices are offered in the same 8-lead SOIC package with an exposed thermal pad, and they share the same pin functions: IP+ and IP- for the primary current path, VCC and GND for supply, VIOUT for the analog output, and FILTER for the external bandwidth-setting capacitor. This common footprint allows a common PCB land pattern, but electrical differences must still be validated.
Can the ACS723LLCTR-10AU-T and ACS722LLCTR-05AB-T be substituted for each other in an existing design?
Not directly without design review. The ACS723LLCTR-10AU-T has a 10 A unidirectional measurement range and 400 mV/A sensitivity, while the ACS722LLCTR-05AB-T has a 5 A bidirectional range and 264 mV/A sensitivity. The different sensitivity, directionality, and full-scale range affect the output voltage swing, ADC scaling, and overcurrent thresholds, so firmware and signal conditioning must be revalidated.
What is the supply voltage and isolation rating for these two current sensors?
Both the ACS723LLCTR-10AU-T and ACS722LLCTR-05AB-T operate from a single 3.3 V or 5 V supply, with a specified supply voltage range of 3.0 V to 5.5 V. Both are galvanically isolated sensor ICs rated for basic isolation with a dielectric strength of 2.4 kV RMS for 1 minute per the manufacturer's datasheet, and they are recognized under UL 60950-1 and CSA 60950-1 for isolation requirements.
How does the bandwidth differ between the ACS723LLCTR-10AU-T and ACS722LLCTR-05AB-T?
Both devices have a nominal -3 dB bandwidth of 80 kHz with the FILTER pin left open. The bandwidth can be reduced by placing a capacitor from the FILTER pin to GND, which is useful for noise reduction. The same external filter capacitor value produces a similar bandwidth reduction on both parts because they share the same signal path architecture.
What are the typical applications for the ACS723LLCTR-10AU-T versus the ACS722LLCTR-05AB-T?
The ACS723LLCTR-10AU-T is typically used for unidirectional current sensing such as motor control, power supply monitoring, and load detection where current flows in one direction and a 10 A range is required. The ACS722LLCTR-05AB-T is typically used for bidirectional current sensing such as battery charge/discharge monitoring, inverter phase current sensing, and power management where current can flow in both directions and a 5 A range is sufficient.
Are the ACS723LLCTR-10AU-T and ACS722LLCTR-05AB-T pin-to-pin compatible with other ACS72x family devices?
Both devices are part of the Allegro ACS72x family and share the same 8-lead SOIC package and pinout as other family members with the same package option. However, pin-to-pin compatibility does not guarantee functional equivalence because sensitivity, directionality, and full-scale range vary by part number. Always confirm the specific device variant against the manufacturer datasheet before layout or substitution.
What is the operating temperature range for the ACS723LLCTR-10AU-T and ACS722LLCTR-05AB-T?
Both the ACS723LLCTR-10AU-T and ACS722LLCTR-05AB-T are specified for an operating ambient temperature range of -40 °C to +125 °C, as stated in the Allegro datasheets. This makes both devices suitable for industrial and automotive-adjacent environments where wide temperature operation is required.