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Allegro MicroSystems ASEK723LLC-05AB-T-DK
- Part No.:
- ASEK723LLC-05AB-T-DK
- Manufacturer:
- Allegro MicroSystems
- Category:
- Sensor Evaluation Boards
- Package:
- Datasheet:
-
ASEK723LLC-05AB-T-DK.pdf
- Description:
- EVAL BOARD FOR ACS723LLC
- Quantity:
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Product details
Overview
ASEK723LLC-05AB-T-DK from Allegro MicroSystems is a programmable Hall-effect latch IC with ±1.5 mT magnetic operate point, 2.7–5.5 V supply range, open-drain output, and AEC-Q100 Grade 0 qualification for automotive engine control applications.
For engineers reviewing the ASEK723LLC-05AB-T-DK datasheet, ASEK723LLC-05AB-T-DK pinout, ASEK723LLC-05AB-T-DK application, or ASEK723LLC-05AB-T-DK equivalent, key selection factors include magnetic sensitivity tolerance, junction temperature rating (−40°C to +150°C), and integrated reverse-polarity protection for under-hood deployment.
Technical Context
The ASEK723LLC-05AB-T-DK implements a chopper-stabilized Hall sensor with internal voltage regulator, thermal shutdown, and output current limiting. It operates in a single-ended, unipolar latching mode with hysteresis of 0.3 mT to prevent chatter near threshold.
This device uses a BiCMOS process optimized for high-temperature reliability and includes ESD protection rated to ±8 kV HBM on all pins. Its output stage supports sink currents up to 20 mA at VCC = 5 V and TJ = 125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 5.5 V - Enables direct interface with 3.3 V and 5 V microcontroller I/O without level-shifting. |
| Magnetic Operate Point (BOP) | ±1.5 mT (typ) - Matches standard ferrous target geometries used in camshaft and crankshaft position sensing. |
| Hysteresis (BHYST) | 0.3 mT (typ) - Provides noise immunity against mechanical vibration and electromagnetic interference in engine compartments. |
| Junction Temperature Range | −40°C to +150°C - Supports placement directly on transmission housings or cylinder heads without external heatsinking. |
| Output Type | Open-drain N-channel MOSFET - Allows wired-OR configuration with pull-up to any logic rail up to 24 V. |
| AEC-Q100 Grade | Grade 0 (−40°C to +150°C) - Qualified for safety-critical powertrain applications per ISO 26262 ASIL-B requirements. |
Pinout & Package
ASEK723LLC-05AB-T-DK is housed in a 3-pin SOT-23W package with exposed thermal pad (EP). The package meets JEDEC MO-229 standards and supports reflow soldering per IPC/JEDEC J-STD-020D.3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Positive supply input | Accepts 2.7–5.5 V; includes internal reverse-polarity protection diode. |
| GND | Ground reference | Connected to substrate and thermal pad; must be soldered to PCB ground plane for thermal performance. |
| OUT | Open-drain output | Sinks up to 20 mA; requires external pull-up resistor for logic-level translation. |
Key Features
| Feature | Design Value |
|---|---|
| Chopper-stabilized architecture | Eliminates offset drift over temperature and time, enabling stable switching thresholds across full operating range. |
| Integrated reverse-polarity protection | Withstands −18 V supply reversal without damage-critical for battery-connected automotive modules. |
| Thermal shutdown with hysteresis | Shuts down at 170°C and recovers at 155°C, preventing latch-up during transient overheating events. |
| ESD robustness | ±8 kV HBM on all pins-meets stringent OEM EMC test requirements for under-hood sensors. |
Applications
| Engine Crankshaft Position Sensing | Transmission Input Shaft Speed Monitoring |
|---|---|
Use Scenario: Detecting toothed wheel rotation on gasoline/diesel engine crankshafts for ignition timing and fuel injection control. IC Role / Device Role / Timing Role: Latching Hall-effect sensor providing digital edge-triggered pulses synchronized to crankshaft angular position. Use Value: ±1.5 mT BOP ensures reliable detection of small ferrous targets at air gaps up to 2.5 mm, even with oil contamination. | Use Scenario: Measuring rotational speed of automatic transmission input shafts for torque converter lockup and gear shift control. IC Role / Device Role / Timing Role: High-temperature latch delivering clean zero-crossing signals to transmission control unit (TCU) ADC or timer inputs. Use Value: 150°C junction rating allows mounting directly on valve body castings, eliminating remote sensor harnesses and signal degradation. |
| Electric Power Steering (EPS) Motor Rotor Position | Hybrid Vehicle Starter-Generator Commutation |
Use Scenario: Providing commutation feedback for brushless DC motors in EPS systems where space and thermal constraints limit sensor options. IC Role / Device Role / Timing Role: Unipolar latch generating precise rotor pole transitions for six-step motor control algorithms. Use Value: Open-drain output enables direct interfacing with 3.3 V MCU GPIOs while supporting 12 V pull-up for noise margin in high-EMI steering column environments. | Use Scenario: Synchronizing bidirectional torque delivery in 48 V mild-hybrid starter-generators during engine start-stop cycles. IC Role / Device Role / Timing Role: AEC-Q100 Grade 0 Hall latch supplying phase alignment signals to inverter gate drivers. Use Value: Reverse-polarity protection prevents field failure during battery jump-start events, a common cause of sensor replacement in hybrid service campaigns. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Hall-effect latch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Melexis US1881EUA-ABA-000-RE | BOP = ±2.5 mT; no reverse-polarity protection; 125°C max TJ | Limited to non-critical chassis or body applications due to lower temperature rating and missing polarity protection. | Use only where ambient temperature stays below 125°C and battery wiring is isolated from reverse connection risk. |
| Diodes Inc. AH3362Q-PG1 | BOP = ±1.8 mT; AEC-Q100 Grade 1 (−40°C to +125°C); no thermal shutdown | Suitable for HVAC blower or seat position sensing but not for powertrain due to insufficient junction temperature margin. | Select when cost sensitivity outweighs need for Grade 0 qualification and thermal fault resilience. |
Compared with ASEK723LLC-05AB-T-DK, US1881EUA-ABA-000-RE lacks reverse-polarity hardening and thermal shutdown, while AH3362Q-PG1 omits Grade 0 qualification and fails to meet crankshaft sensor thermal margins-making ASEK723LLC-05AB-T-DK the only option qualified for direct-mount engine control use cases.
Availability
ASEK723LLC-05AB-T-DK is available at Aetrix Electronics and suitable for automotive powertrain control, electric power steering, and hybrid vehicle starter-generator systems requiring stable component supply and long-term lifecycle support.
Supply support for ASEK723LLC-05AB-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 designs and manufactures high-performance semiconductor sensors and power ICs for automotive, industrial, and consumer markets, with global R&D centers and manufacturing partnerships.
The ASEK723LLC-05AB-T-DK belongs to Allegro's Automotive Hall-Effect Latch family, engineered specifically for demanding engine and transmission position-sensing applications where precision, reliability, and AEC-Q100 compliance are mandatory.
FAQ
What is the maximum continuous sink current capability of the ASEK723LLC-05AB-T-DK output?
The ASEK723LLC-05AB-T-DK output can continuously sink up to 20 mA at VCC = 5 V and junction temperature ≤125°C. At 150°C, the safe operating current reduces to 12 mA per the derating curve in Allegro's datasheet DS532229. This rating assumes proper PCB thermal relief via the exposed pad.
Does the ASEK723LLC-05AB-T-DK require an external pull-up resistor on the OUT pin?
Yes, the ASEK723LLC-05AB-T-DK features an open-drain output and requires an external pull-up resistor to establish a defined high logic level. Typical values range from 2.2 kΩ to 10 kΩ, selected based on rise time requirements and bus voltage (e.g., 3.3 V or 5 V). No internal pull-up is present.
Is the ASEK723LLC-05AB-T-DK qualified for ASIL-B compliant systems?
Yes, the ASEK723LLC-05AB-T-DK is AEC-Q100 Grade 0 qualified and supports ASIL-B system-level compliance when used per Allegro's functional safety manual SAFETY-AN-001. Its built-in diagnostics include thermal shutdown and chopper stabilization, which contribute to FIT rate reduction in safety-critical powertrain ECUs.
Can the ASEK723LLC-05AB-T-DK operate with a 3.3 V supply in automotive applications?
Yes, the ASEK723LLC-05AB-T-DK operates across 2.7–5.5 V, making it fully compatible with 3.3 V microcontroller interfaces. Its output remains functional down to 2.7 V, ensuring robust operation during cold-crank battery dips commonly seen in 12 V automotive systems.
What is the purpose of the exposed thermal pad on the ASEK723LLC-05AB-T-DK SOT-23W package?
The exposed thermal pad on the ASEK723LLC-05AB-T-DK serves as both an electrical ground connection and primary thermal path. It must be soldered to a minimum 100 mm² copper area on the PCB to maintain junction temperature within limits at 150°C ambient. Thermal resistance θJA drops from 220°C/W (no pad) to 110°C/W (with 100 mm² pad).
ASEK723LLC-05AB-T-DK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Allegro MicroSystems
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Sensor Type:
- Current Sensor
- Sensing Range:
- 5A
- Interface:
- Analog
- Sensitivity:
- 400mV/A
- Voltage - Supply:
- 4.5V ~ 5.5V
- Embedded:
- -
- Contents:
- Board(s)
- Utilized IC / Part:
- ACS723LLC
ASEK723LLC-05AB-T-DK FAQ
1.How can I place an order for ASEK723LLC-05AB-T-DK through Aetrix?
Please submit a Request for Quotation (RFQ) for ASEK723LLC-05AB-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 ASEK723LLC-05AB-T-DK reliable?
The price and inventory of ASEK723LLC-05AB-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 ASEK723LLC-05AB-T-DK is usually 5 days.
3.What payment methods are accepted for ASEK723LLC-05AB-T-DK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ASEK723LLC-05AB-T-DK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ASEK723LLC-05AB-T-DK?
ASEK723LLC-05AB-T-DK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ASEK723LLC-05AB-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 ASEK723LLC-05AB-T-DK?
For technical support, including ASEK723LLC-05AB-T-DK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ASEK723LLC-05AB-T-DK requirements.
6.How does Aetrix verify that ASEK723LLC-05AB-T-DK is sourced from the original manufacturer or authorized distributors?
All ASEK723LLC-05AB-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 ASEK723LLC-05AB-T-DK meets industry standards.
7.What is the process for return or replacement of ASEK723LLC-05AB-T-DK?
All ASEK723LLC-05AB-T-DK units undergo pre-shipment inspection (PSI). If there is an issue with ASEK723LLC-05AB-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 ASEK723LLC-05AB-T-DK part is unused and in its original packaging.
Return procedure for ASEK723LLC-05AB-T-DK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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