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Allegro MicroSystems ASEK722KMA-10AB-T-DK
- Part No.:
- ASEK722KMA-10AB-T-DK
- Manufacturer:
- Allegro MicroSystems
- Category:
- Sensor Evaluation Boards
- Package:
- Datasheet:
-
ASEK722KMA-10AB-T-DK.pdf
- Description:
- EVAL BOARD FOR ACS722KMA
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Product details
Overview
ASEK722KMA-10AB-T-DK from Allegro MicroSystems is a high-isolation, bidirectional Hall-effect current sensor IC in SOIC16W package, rated for ±10 A sensing range, 132 mV/A sensitivity, and 0.85 mΩ primary conductor resistance. It delivers ratiometric analog output with ±1.7% total output error over –40°C to 125°C, supporting motor control, switched-mode power supplies, and overcurrent protection in industrial and commercial systems.
For engineers reviewing the ASEK722KMA-10AB-T-DK datasheet, ASEK722KMA-10AB-T-DK pinout, ASEK722KMA-10AB-T-DK application, or ASEK722KMA-10AB-T-DK equivalent, this page provides verified technical context, isolation-rated package details, bandwidth-selectable response (20/80 kHz), UL60950-1 certified safety parameters, and validated alternatives for legacy design continuity.
Technical Context
The ASEK722KMA-10AB-T-DK integrates a chopper-stabilized BiCMOS Hall IC with patented digital temperature compensation, enabling near closed-loop accuracy in an open-loop architecture. Its copper conduction path (pins 1–4 and 5–8) generates magnetic flux sensed by the on-die Hall element, with offset cancellation and sensitivity trimming performed at factory.
Electrical isolation is achieved via reinforced insulation: 4.8 kVRMS dielectric strength, 565 VRMS reinforced working voltage, and 8.2 mm creepage. Bandwidth selection (20 kHz low-noise / 80 kHz high-speed) is controlled by the BW_SEL pin, while output remains ratiometric to 3.3 V supply and features ±1% nonlinearity across full range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Current Range | ±10 A continuous - supports bidirectional load monitoring without polarity reversal circuitry |
| Sensitivity | 132 mV/A typical - enables direct ADC interface with 12-bit resolution at ±10 A full scale |
| Primary Resistance | 0.85 mΩ typical - limits power loss to <1 W at 60 A peak, preserving thermal margin |
| Isolation Rating | UL60950-1 certified, 4.8 kVRMS - permits high-side sensing in 1000 VDC systems without external isolators |
| Bandwidth Options | 20 kHz or 80 kHz selectable via BW_SEL pin - trade-off between noise (42 mArms) and speed (5 µs response) |
| Total Output Error | ±1.7% at 25–125°C - includes sensitivity drift, offset voltage, and lifetime drift contributions |
| Supply Voltage | 3.0–3.6 V single supply - compatible with modern low-voltage microcontrollers and LDOs |
Pinout & Package
ASEK722KMA-10AB-T-DK uses a high-isolation 16-pin SOICW (package suffix MA), with 7.5 mm clearance and 8.2 mm creepage. The package features matte tin-plated leadframe, Pb-free construction (except exempt flip-chip solder), and is optimized for surface-mount assembly on 4 oz. copper PCBs with thermal vias.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4 | IP+ | High-side primary current input terminals - fused internally; connect to power rail or load source |
| 5, 6, 7, 8 | IP− | Low-side primary current return terminals - fused internally; complete current path for sensing |
| 9, 16 | NC | No internal connection - must remain unconnected to maintain ≥8 mm creepage per UL requirements |
| 10 | VCC | 3.0–3.6 V power supply input - requires local 0.1 µF bypass capacitor to GND |
| 11, 14 | NC | No internal connection - recommended to tie to GND for optimal ESD immunity |
| 12 | VIOUT | Analog output (0.1 × VCC to 0.9 × VCC) - ratiometric, proportional to ±10 A sensed current |
| 13 | BW_SEL | Bandwidth select: grounded = 80 kHz, tied to VCC = 20 kHz - configures noise/speed trade-off |
| 15 | GND | Signal ground reference - must be star-connected to minimize ground loop errors |
Key Features
| Feature | Design Value |
|---|---|
| Digital temperature compensation | Reduces thermal drift of zero-current output to ±7 mV over –40°C to 125°C, eliminating external calibration |
| Reinforced isolation | 565 VRMS working voltage enables direct integration into Class I mains-connected equipment without auxiliary isolation |
| Chopper-stabilized architecture | Ensures <10 µV/°C offset drift and near-zero magnetic hysteresis - critical for precision energy metering |
| Programmable bandwidth | Hardware-selectable 20/80 kHz modes allow optimization for either low-noise motor phase current or fast fault detection |
| Factory-trimmed sensitivity | 132 mV/A tolerance maintained within ±1.5% over temperature - reduces system-level gain calibration effort |
Applications
| Motor Control | Switched-Mode Power Supply |
|---|---|
|
Use Scenario: Real-time phase current monitoring in 3-phase BLDC inverters for field-oriented control. IC Role / Device Role / Timing Role: High-side current sensor providing isolated analog feedback to MCU ADC with <5 µs latency at 80 kHz mode. Use Value: Enables precise torque regulation and overcurrent shutdown within 10 µs, leveraging 0.85 mΩ conduction loss to minimize thermal derating. |
Use Scenario: Input/output current sensing in 1–3 kW AC/DC rectifiers and DC/DC converters. IC Role / Device Role / Timing Role: Bidirectional sensing of inrush, steady-state, and fault currents with ratiometric output referenced to 3.3 V controller supply. Use Value: Eliminates need for shunt amplifiers and optocouplers - reduces BOM count by 4 components while maintaining UL-certified isolation. |
| Overcurrent Protection | Industrial Load Management |
|
Use Scenario: Fast-trip detection in programmable logic controller (PLC) output modules driving solenoids and contactors. IC Role / Device Role / Timing Role: Primary current monitor with 2 µs propagation delay (BW_SEL = GND) feeding comparator or digital fault logic. Use Value: Achieves sub-10 µs fault response time while sustaining 60 A continuous - exceeds IEC 61000-4-5 surge immunity requirements. |
Use Scenario: Energy-aware monitoring of HVAC compressor, pump, and fan loads in building automation systems. IC Role / Device Role / Timing Role: Low-drift, temperature-compensated current transducer interfacing to 16-bit sigma-delta ADC for kWh calculation. Use Value: Delivers ±1.7% total error across –40°C to 125°C ambient - enables Class 0.5 metering accuracy without recalibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Hall-effect current sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ACS37002 | Higher accuracy (±0.6% total error), integrated digital interface (I²C/SPI), 3.3 V only, SOIC16 footprint-compatible but not pin-to-pin | Designed for digital-control loops requiring real-time diagnostics and configurable filtering - not suitable for analog-only signal chains | Select ACS37002 when migrating to digital control architecture and require fault logging, temperature reporting, or dynamic range adjustment. |
| ACS725 | Lower isolation (3.3 kVRMS), ±10 A range, 132 mV/A, same SOIC16W package and pinout, but no UL certification or reinforced isolation rating | Targeted at cost-sensitive, non-safety-critical applications where basic isolation suffices - lacks UL60950-1 compliance documentation | Choose ACS725 only for internal subsystems with <300 VRMS working voltage and no regulatory certification requirement. |
Compared with ASEK722KMA-10AB-T-DK, ACS37002 offers superior accuracy and digital flexibility but requires firmware integration, while ACS725 provides mechanical compatibility at reduced isolation assurance - neither is a drop-in replacement, and ASEK722KMA-10AB-T-DK remains required for UL-certified high-voltage designs.
Availability
ASEK722KMA-10AB-T-DK is available at Aetrix Electronics and suitable for motor control, switched-mode power supplies, and overcurrent protection requiring stable component supply under extended industrial temperature and safety certification constraints.
Supply support for ASEK722KMA-10AB-T-DK includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Allegro MicroSystems is a U.S.-based semiconductor company specializing in magnetic sensing, power ICs, and motion control solutions, serving automotive, industrial, and communications markets since 1989.
The ACS722 product line was engineered for high-isolation, cost-effective current sensing in space-constrained industrial systems - emphasizing UL-certified safety, low conduction loss, and factory-calibrated accuracy without external compensation.
FAQ
What is the isolation rating of the ASEK722KMA-10AB-T-DK?
The ASEK722KMA-10AB-T-DK is UL60950-1 (ed. 2) certified with 4.8 kVRMS dielectric strength, 1097 VRMS basic isolation working voltage, and 565 VRMS reinforced isolation working voltage. Clearance is 7.5 mm and creepage is 8.2 mm - meeting reinforced insulation requirements for 1000 VDC systems. These values are type-tested and production-verified per UL standards.
Can ASEK722KMA-10AB-T-DK be used for high-side current sensing?
Yes, ASEK722KMA-10AB-T-DK is explicitly designed for high-side current sensing. Its primary conduction path (pins 1–4 and 5–8) is electrically isolated from signal pins (9–16), eliminating the need for differential amplifiers or optocouplers. This isolation enables direct connection to bus voltages up to 1000 VDC while maintaining signal integrity and safety compliance.
What does "Not for New Design" mean for ASEK722KMA-10AB-T-DK?
"Not for New Design" indicates ASEK722KMA-10AB-T-DK is restricted to existing customer applications due to planned obsolescence. Allegro no longer recommends it for new projects and has designated ACS37002 and ACS725 as preferred alternatives. However, ASEK722KMA-10AB-T-DK remains in production and fully supported for legacy designs requiring UL60950-1 reinforced isolation.
How is bandwidth selected on ASEK722KMA-10AB-T-DK?
Bandwidth is selected using the BW_SEL pin (pin 13): grounding it enables 80 kHz operation (4 µs rise time, higher noise), while tying it to VCC selects 20 kHz mode (17.5 µs rise time, lower 42 mArms noise). This hardware-selectable feature allows designers to optimize for speed or signal fidelity without changing firmware or external components.
What is the primary conductor resistance of ASEK722KMA-10AB-T-DK?
The primary conductor resistance of ASEK722KMA-10AB-T-DK is 0.85 mΩ typical at 25°C. This ultra-low resistance minimizes power loss (<850 mW at 10 ARMS) and enables high inrush current withstand capability - critical for motor start-up and capacitor charging applications where thermal stress must be managed.
ASEK722KMA-10AB-T-DK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Allegro MicroSystems
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Not For New Designs
- Sensor Type:
- Current Sensor
- Sensing Range:
- 10A
- Interface:
- Analog
- Sensitivity:
- 132mV/A
- Voltage - Supply:
- 3V ~ 3.6V
- Embedded:
- -
- Contents:
- Board(s)
- Utilized IC / Part:
- ACS722KMA
ASEK722KMA-10AB-T-DK FAQ
1.How can I place an order for ASEK722KMA-10AB-T-DK through Aetrix?
Please submit a Request for Quotation (RFQ) for ASEK722KMA-10AB-T-DK on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ASEK722KMA-10AB-T-DK reliable?
The price and inventory of ASEK722KMA-10AB-T-DK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ASEK722KMA-10AB-T-DK is usually 5 days.
3.What payment methods are accepted for ASEK722KMA-10AB-T-DK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ASEK722KMA-10AB-T-DK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ASEK722KMA-10AB-T-DK?
ASEK722KMA-10AB-T-DK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ASEK722KMA-10AB-T-DK order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ASEK722KMA-10AB-T-DK?
For technical support, including ASEK722KMA-10AB-T-DK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ASEK722KMA-10AB-T-DK requirements.
6.How does Aetrix verify that ASEK722KMA-10AB-T-DK is sourced from the original manufacturer or authorized distributors?
All ASEK722KMA-10AB-T-DK products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ASEK722KMA-10AB-T-DK meets industry standards.
7.What is the process for return or replacement of ASEK722KMA-10AB-T-DK?
All ASEK722KMA-10AB-T-DK units undergo pre-shipment inspection (PSI). If there is an issue with ASEK722KMA-10AB-T-DK, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ASEK722KMA-10AB-T-DK part is unused and in its original packaging.
Return procedure for ASEK722KMA-10AB-T-DK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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