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Allegro MicroSystems ASEK730KLC-20AB-T-DK
- Part No.:
- ASEK730KLC-20AB-T-DK
- Manufacturer:
- Allegro MicroSystems
- Category:
- Sensor Evaluation Boards
- Package:
- Datasheet:
-
ASEK730KLC-20AB-T-DK.pdf
- Description:
- EVAL BOARD FOR ACS730
- Quantity:
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- Shipping:
Inventory:3,675
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Product details
Overview
ASEK730KLC-20AB-T-DK from Allegro MicroSystems is a galvanically isolated, bidirectional current sensor IC in an 8-pin SOIC package, delivering 1 MHz bandwidth, ±20 A sensing range, 100 mV/A sensitivity, and 1.2 mΩ primary conductor resistance. It enables high-accuracy AC/DC current measurement in high-side motor control and overcurrent protection circuits with integrated temperature compensation and 2400 VRMS isolation.
For engineers reviewing the ASEK730KLC-20AB-T-DK datasheet, ASEK730KLC-20AB-T-DK pinout, ASEK730KLC-20AB-T-DK application, or ASEK730KLC-20AB-T-DK equivalent, key selection criteria include isolation rating (2400 VRMS), bandwidth (1 MHz), total output error (±3% over –40°C to 125°C), zero-current reference voltage (2.5 V), and SOIC8 footprint compatibility with space-constrained PCB layouts.
Technical Context
The ASEK730KLC-20AB-T-DK uses a flip-chip Hall-effect architecture with copper conduction path (pins 1–4) magnetically coupled to an integrated Hall transducer and analog signal chain. Its patented digital temperature compensation maintains accuracy across –40°C to 125°C ambient without external calibration.
Galvanic isolation is achieved via internal insulation (44 µm DTI) and 4 mm creepage/clearance, certified to UL 62368-1 for 2400 VRMS withstand and 420 VPK working voltage. The device operates from a single 5 V supply and outputs a ratiometric analog voltage (VIOUT) referenced to VZCR = 2.5 V at zero current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Sensing Range | ±20 A - supports bidirectional current monitoring in motor phase legs and DC bus lines |
| Bandwidth | 1 MHz - enables accurate capture of fast-switching waveforms in SiC/GaN inverters |
| Sensitivity | 100 mV/A - yields 2.5 V output at ±20 A, simplifying ADC interface design |
| Primary Resistance | 1.2 mΩ - limits power loss to <2.4 mW at 20 A, reducing thermal stress |
| Isolation Rating | 2400 VRMS - meets basic isolation requirements per UL 62368-1 for industrial safety |
| Total Output Error | ±3% - includes sensitivity, offset, and nonlinearity errors over full temperature range |
| Supply Voltage | 4.5–5.5 V - compatible with standard 5 V rail systems without regulation overhead |
Pinout & Package
ASEK730KLC-20AB-T-DK is housed in an 8-pin SOICN (package suffix LC), surface-mount package with matte tin-plated leadframe for Pb-free assembly compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 (IP+) | Current input high-side terminal | Fused copper path entry point; carries sensed current into device |
| 3, 4 (IP–) | Current input low-side terminal | Fused copper path exit point; completes primary conduction loop |
| 5 (GND) | Signal ground reference | Return path for VIOUT and VZCR; electrically isolated from IP terminals |
| 6 (VZCR) | Zero-current reference output | Provides stable 2.5 V DC reference for differential VIOUT interpretation |
| 7 (VIOUT) | Analog current-proportional output | Linear 0–5 V output (2.5 V at 0 A); drives 10 kΩ min load |
| 8 (VCC) | Power supply input | 5 V supply with 17–25 mA quiescent current; requires 0.1 µF bypass capacitor |
Key Features
| Feature | Design Value |
|---|---|
| Integrated magnetic shield | Eliminates capacitive coupling from high dV/dt transients on IP path to die |
| Digital temperature compensation | Enables ±3% total output error over –40°C to 125°C without external circuitry |
| Low-offset factory trimming | Reduces zero-current output voltage error to ±50 mV over full temperature range |
| High PSRR (35 dB) | Maintains accuracy under 100 mVpp ripple on VCC in noisy power environments |
| 1.2 mΩ conductor resistance | Supports 20 A continuous current with <1°C self-heating rise at TA = 85°C |
Applications
| Motor Control Feedback | Switched-Mode Power Supply Monitoring |
|---|---|
Use Scenario: Real-time phase current sampling in 3-phase BLDC inverter for field-oriented control. IC Role / Device Role / Timing Role: High-bandwidth, isolated current sensor providing synchronized analog feedback to MCU ADC. Use Value: 1 MHz bandwidth captures fast current transitions during PWM switching; ±20 A range covers peak motor currents in 1–3 kW drives. | Use Scenario: Input/output current monitoring in 1–5 kW telecom rectifiers and server PSUs. IC Role / Device Role / Timing Role: Galvanically isolated current sense element enabling safe ground-referenced measurement of high-voltage rails. Use Value: 2400 VRMS isolation and 4 mm creepage meet IEC/UL safety standards; 1.2 mΩ resistance minimizes conduction loss in high-efficiency designs. |
| Overcurrent Fault Protection | Energy Metering Interface |
Use Scenario: Fast trip detection in industrial PLC output modules protecting solenoids and actuators. IC Role / Device Role / Timing Role: Primary overcurrent detector feeding comparator or microcontroller interrupt input. Use Value: 0.7 µs response time enables sub-microsecond fault reaction; ±20 A range aligns with common 16–25 A breaker thresholds. | Use Scenario: Bidirectional current sensing in residential solar inverters for net metering calculations. IC Role / Device Role / Timing Role: Isolated analog front-end converting line current to precision voltage for energy ASIC or metrology MCU. Use Value: ±20 A range and ±3% total error support Class 0.5 metering accuracy; 2.5 V VZCR simplifies differential ADC biasing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ACS37030 | Higher bandwidth (2 MHz), lower noise (25 µA/√Hz), but ±15 A range and different SOIC16 package | Requires PCB redesign due to 16-pin SOIC footprint and altered pinout | Select when >1 MHz bandwidth and lower noise are critical; verify layout compatibility |
| CT428 | Lower cost, 800 kHz bandwidth, ±25 A range, same SOIC8 package but no VZCR pin | Lacks dedicated zero-current reference; requires external reference or ratiometric ADC calibration | Choose for cost-sensitive, non-critical applications where 800 kHz suffices and VZCR is not required |
Compared with ACS37030 and CT428, ASEK730KLC-20AB-T-DK offers the optimal balance of 1 MHz bandwidth, SOIC8 footprint compatibility, integrated VZCR, and UL-certified 2400 VRMS isolation-making it suitable for industrial motor drives where layout continuity and safety certification are mandatory.
Availability
ASEK730KLC-20AB-T-DK is available at Aetrix Electronics and suitable for motor control feedback, switched-mode power supply monitoring, overcurrent fault protection, and energy metering interface applications requiring stable component supply and long-term design continuity.
Supply support for ASEK730KLC-20AB-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 designer and manufacturer of high-performance magnetic sensing and power ICs, specializing in Hall-effect sensors, current sensors, and motor driver solutions.
The ACS730 family-including ASEK730KLC-20AB-T-DK-is engineered for high-reliability industrial and automotive current sensing, emphasizing galvanic isolation, wide temperature operation, and factory-trimmed accuracy without external calibration.
FAQ
What is the isolation voltage rating of ASEK730KLC-20AB-T-DK?
The ASEK730KLC-20AB-T-DK is UL 62368-1 certified for 2400 VRMS withstand voltage (60 s) and 420 VPK working voltage for basic isolation. Its internal insulation distance is 44 µm, with 4 mm creepage and clearance between primary and secondary sides-meeting industrial safety requirements without external barrier components.
Does ASEK730KLC-20AB-T-DK require external calibration for accuracy?
No, ASEK730KLC-20AB-T-DK does not require external calibration. It features factory-trimmed sensitivity and quiescent output voltage, plus patented digital temperature compensation, delivering ±3% total output error over –40°C to 125°C without user adjustment or external components.
What is the meaning of the "-T" suffix in ASEK730KLC-20AB-T-DK?
The "-T" suffix indicates Pb-based solder bumps used in flip-chip assembly, compliant with RoHS Directive 2011/65/EU Annex III/IV exemptions (7(a), 15, 15a). Electrical performance is identical to "-S" variants; only the interconnect metallurgy differs-no impact on ASEK730KLC-20AB-T-DK functionality or reliability.
Can ASEK730KLC-20AB-T-DK measure both AC and DC current?
Yes, ASEK730KLC-20AB-T-DK measures both AC and DC current bidirectionally within its ±20 A range. Its Hall-effect sensing principle provides true RMS-capable response up to 1 MHz, with linear output (VIOUT = 2.5 V ± 2.0 V) proportional to instantaneous current, making it suitable for inverter phase current and DC bus monitoring.
What is the recommended bypass capacitor for ASEK730KLC-20AB-T-DK?
The recommended bypass capacitor for ASEK730KLC-20AB-T-DK is 0.1 µF ceramic placed between VCC (pin 8) and GND (pin 5), as specified in the datasheet. This ensures stable 5 V supply regulation and minimizes noise coupling into the analog signal path, preserving the device's 35 dB PSRR and 40 mARMS noise performance.
ASEK730KLC-20AB-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:
- 20A
- Interface:
- Analog
- Sensitivity:
- 100mV/A
- Voltage - Supply:
- 4.5V ~ 5.5V
- Embedded:
- -
- Contents:
- Board(s)
- Utilized IC / Part:
- ACS730
ASEK730KLC-20AB-T-DK FAQ
1.How can I place an order for ASEK730KLC-20AB-T-DK through Aetrix?
Please submit a Request for Quotation (RFQ) for ASEK730KLC-20AB-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 ASEK730KLC-20AB-T-DK reliable?
The price and inventory of ASEK730KLC-20AB-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 ASEK730KLC-20AB-T-DK is usually 5 days.
3.What payment methods are accepted for ASEK730KLC-20AB-T-DK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ASEK730KLC-20AB-T-DK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ASEK730KLC-20AB-T-DK?
ASEK730KLC-20AB-T-DK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ASEK730KLC-20AB-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 ASEK730KLC-20AB-T-DK?
For technical support, including ASEK730KLC-20AB-T-DK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ASEK730KLC-20AB-T-DK requirements.
6.How does Aetrix verify that ASEK730KLC-20AB-T-DK is sourced from the original manufacturer or authorized distributors?
All ASEK730KLC-20AB-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 ASEK730KLC-20AB-T-DK meets industry standards.
7.What is the process for return or replacement of ASEK730KLC-20AB-T-DK?
All ASEK730KLC-20AB-T-DK units undergo pre-shipment inspection (PSI). If there is an issue with ASEK730KLC-20AB-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 ASEK730KLC-20AB-T-DK part is unused and in its original packaging.
Return procedure for ASEK730KLC-20AB-T-DK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ASEK730KLC-20AB-T-DK Tags
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