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Allegro MicroSystems A1393SEHLX-T
- Part No.:
- A1393SEHLX-T
- Manufacturer:
- Allegro MicroSystems
- Category:
- Linear, Compass (ICs)
- Package:
- 6-PowerWFDFN
- Datasheet:
-
A1393SEHLX-T.pdf
- Description:
- SENSOR HALL ANALOG 6MLP/DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,202
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Product details
Overview
A1393SEHLX-T from Allegro MicroSystems is a micropower 3 V linear Hall-effect sensor IC with tri-state output and user-selectable sleep mode, designed for precise magnetic field sensing in battery-constrained systems. It delivers 5 mV/G typical sensitivity, operates from 2.5–3.5 V supply, consumes <25 µA in sleep mode, and features ratiometric output referenced to the VREF pin - enabling high-accuracy position and current sensing in portable electronics.
For engineers reviewing the A1393SEHLX-T datasheet, A1393SEHLX-T pinout, A1393SEHLX-T application, or A1393SEHLX-T equivalent, key selection considerations include its 6-pin MLP/DFN package, tri-state output behavior during sleep, VREF-referenced ratiometry, and compatibility with multi-sensor sharing of a single ADC input.
Technical Context
The A1393SEHLX-T integrates a Hall element, dynamic offset cancellation circuitry, chopper-stabilized amplifier, and temperature-compensated gain/offset trimming - all in a BiCMOS monolithic die. Its output voltage is ratiometric to the VREF pin (not VCC), with quiescent output fixed at 50% × VREF and sensitivity scaling linearly with VREF.
Sleep mode is controlled via a logic-level SLEEP pin: low enables high-impedance output (<4 MΩ) and sub-25 µA supply current; high activates full functionality with 3.2 mA typical ICC and 10 kHz bandwidth. Power-on time is 40–60 µs; power-off time is ≤1 µs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Sensitivity | 5 mV/G typical - enables high-resolution detection of weak magnetic fields without external amplification |
| Supply Voltage Range | 2.5–3.5 V - compatible with single-cell Li-ion and 3 V coin-cell systems |
| Sleep Current | <25 µA - extends battery life in intermittent-sensing applications like lid open/close detection |
| Active Supply Current | 3.2 mA typical - balances responsiveness and power efficiency for real-time monitoring |
| Output Bandwidth | 10 kHz - supports dynamic motion sensing up to ~1.6 kHz mechanical frequency |
| Quiescent Output | 50% × VREF - provides stable zero-field reference independent of VCC fluctuations |
| Output Resistance | 20 Ω active / >4 MΩ sleep - ensures clean signal integrity and safe multi-device bus sharing |
Pinout & Package
Package: 6-pin MLP/DFN (2.0 × 3.0 mm, 0.75 mm height), Pb-free, 100% matte tin leadframe plating, exposed thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VCC | Power supply input | Primary device supply rail; must be ≥2.5 V and ≤3.5 V; clamped at 6–8.3 V |
| 2 - OUT | Analog output | Voltage output proportional to magnetic field; tri-state (high-Z) when SLEEP = low |
| 3 - GND | Ground reference | Signal and power ground; pin 4 is second GND terminal for improved thermal and electrical performance |
| 4 - GND | Ground reference | Dual-GND configuration reduces impedance and improves noise immunity in compact layouts |
| 5 - SLEEP | Mode control input | Logic input: high → active mode (3.2 mA); low → sleep mode (<25 µA); threshold at 0.2×VCC / 0.45×VCC |
| 6 - VREF | Ratiometric reference | Defines output scaling baseline; quiescent output = 0.5×VREF; sensitivity ∝ VREF; must be ≤VCC |
Key Features
| Feature | Design Value |
|---|---|
| Tri-state output with sleep control | Enables multiple A1393SEHLX-T devices to share one ADC input without external multiplexing |
| VREF-referenced ratiometry | Eliminates sensitivity drift due to supply variation when VREF is derived from stable reference source |
| Dynamic offset cancellation | Reduces thermal drift and 1/f noise, maintaining linearity and symmetry across –20°C to 85°C |
| Chopper stabilization | 200 kHz chopping frequency suppresses offset drift and low-frequency noise for stable DC field measurement |
| ESD protection | >3 kV HBM - enhances robustness in handheld and industrial assembly environments |
Applications
| Smartphone Lid Detection | Portable Power Tool RPM Sensing |
|---|---|
Use Scenario: Detect flip cover open/close state in smartphones and tablets using magnet-integrated hinge. IC Role / Device Role / Timing Role: Linear Hall sensor providing analog voltage proportional to magnetic flux density near hinge magnet. Use Value: Sub-25 µA sleep current extends standby battery life; tri-state output prevents signal contention when multiple sensors share MCU ADC. | Use Scenario: Measure motor rotation speed in cordless drills via back-EMF or embedded magnet on rotor. IC Role / Device Role / Timing Role: High-bandwidth (10 kHz) linear sensor capturing rapid field changes during rotation. Use Value: 5 mV/G sensitivity resolves fine angular increments; ratiometric output maintains accuracy across battery discharge voltage range. |
| Digital Camera Lens Position Feedback | Wireless Earbud Case Lid Monitoring |
Use Scenario: Track lens extension/retraction position in compact autofocus modules using small surface-mount magnet. IC Role / Device Role / Timing Role: Precision linear transducer converting axial magnet displacement into calibrated analog voltage. Use Value: Temperature-stable quiescent output and sensitivity ensure consistent focus calibration across operating temperature range (–20°C to 85°C). | Use Scenario: Monitor charging case lid closure status in true wireless stereo (TWS) earbuds to trigger auto-power-down. IC Role / Device Role / Timing Role: Ultra-low-power Hall switch replacement with analog output for graded proximity detection. Use Value: 2.0 × 3.0 mm DFN footprint fits tight space constraints; dual-GND pins improve signal integrity in noisy RF-rich earbud PCBs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar linear Hall-effect sensor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| A1392SEHLT-T | 2.5 mV/G sensitivity (half that of A1393SEHLX-T); identical package, pinout, and sleep architecture | Better suited for medium-field applications where higher sensitivity would saturate output | Select when magnetic field strength exceeds ±100 G or when lower gain improves SNR in noisy environments |
| AL33030EUA-T | 3.3 V fixed supply, 3.5 mV/G sensitivity, no VREF pin - output ratiometric to VCC only; same 6-pin DFN package | Lacks VREF flexibility and sleep-mode current optimization; simpler biasing but less precision under varying supplies | Choose for cost-sensitive designs requiring basic linear sensing without ratiometric referencing or ultra-low sleep current |
Compared with A1392SEHLT-T and AL33030EUA-T, the A1393SEHLX-T offers the highest sensitivity in the family and unique VREF-based ratiometry - critical for applications demanding field accuracy across supply variations and multi-sensor ADC sharing.
Availability
A1393SEHLX-T is available at Aetrix Electronics and suitable for smartphone lid detection, portable power tool RPM sensing, digital camera lens position feedback, and wireless earbud case lid monitoring requiring stable component supply and long-term production continuity.
Supply support for A1393SEHLX-T 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 motor driver solutions for automotive, industrial, and consumer markets.
The A139x product line was engineered for ultra-low-power, high-accuracy linear Hall sensing in portable electronics - emphasizing micropower operation, ratiometric stability, and multi-device system integration.
FAQ
What is the function of the VREF pin on the A1393SEHLX-T?
The VREF pin on the A1393SEHLX-T sets the ratiometric reference for both quiescent output voltage (VOUTQ = 0.5 × VREF) and sensitivity (Sens ∝ VREF). Unlike VCC, which powers the internal circuitry, VREF defines the scaling baseline - enabling accurate field measurement even when VCC varies, provided VREF is stable and ≤ VCC. This decoupling is essential for precision applications such as battery-powered position sensing.
How does the sleep mode affect the output behavior of the A1393SEHLX-T?
In sleep mode (SLEEP pin low), the A1393SEHLX-T output enters high-impedance state (>4 MΩ), disabling analog drive while reducing supply current to <25 µA. The output is invalid and must not be sampled. This feature allows multiple A1393SEHLX-T devices to share a single ADC input - only the active device drives the line, eliminating need for external multiplexers or isolation components in multi-sensor systems.
Can the A1393SEHLX-T operate with VCC and VREF supplied from different sources?
Yes - the A1393SEHLX-T supports independent VCC and VREF supplies, as long as VREF ≤ VCC and VREF remains within 2.5–VCC V. This enables flexible system architectures: e.g., VCC from a noisy battery rail and VREF from a clean microprocessor supply, ensuring ratiometric accuracy is preserved despite VCC ripple. The device's ratiometry is defined solely by VREF, not VCC.
What is the maximum magnetic field range supported by the A1393SEHLX-T?
The A1393SEHLX-T does not specify absolute maximum field limits, but its linear output range is bounded by VOUTL = 0.1 V and VOUTH = VREF – 0.1 V. With VREF = 3.0 V and sensitivity = 5 mV/G, full-scale linear range is approximately ±280 G (±0.028 T). Beyond this, output saturates - though the device remains undamaged. For best linearity and symmetry, operation within ±150 G is recommended per characterization data.
Is the A1393SEHLX-T qualified for automotive applications?
No - Allegro explicitly states that A139x products in DFN packages (including A1393SEHLX-T) are not intended for automotive applications. They are specified for commercial/industrial temperature range (–20°C to 85°C), lack AEC-Q200 qualification, and do not meet automotive reliability or qualification requirements. For automotive use, engineers should select Allegro's AEC-Q200-qualified Hall sensors such as the ATS6xx or A13xxQ families.
A1393SEHLX-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Allegro MicroSystems
- Series:
- A139x
- Package/Case:
- 6-PowerWFDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Hall Effect
- Axis:
- Single
- Output Type:
- Analog Voltage
- Sensing Range:
- -
- Voltage - Supply:
- 2.5V ~ 3.5V
- Current - Supply (Max):
- 3.2mA
- Current - Output (Max):
- -
- Resolution:
- -
- Bandwidth:
- 10kHz
- Operating Temperature:
- -20°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Features:
- Sleep Mode, Temperature Compensated
- Supplier Device Package:
- 6-MLP/DFN (2x3)
- Mounting Type:
- Surface Mount
A1393SEHLX-T FAQ
1.How can I place an order for A1393SEHLX-T through Aetrix?
Please submit a Request for Quotation (RFQ) for A1393SEHLX-T 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 A1393SEHLX-T reliable?
The price and inventory of A1393SEHLX-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for A1393SEHLX-T is usually 5 days.
3.What payment methods are accepted for A1393SEHLX-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for A1393SEHLX-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for A1393SEHLX-T?
A1393SEHLX-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your A1393SEHLX-T 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 A1393SEHLX-T?
For technical support, including A1393SEHLX-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your A1393SEHLX-T requirements.
6.How does Aetrix verify that A1393SEHLX-T is sourced from the original manufacturer or authorized distributors?
All A1393SEHLX-T 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 A1393SEHLX-T meets industry standards.
7.What is the process for return or replacement of A1393SEHLX-T?
All A1393SEHLX-T units undergo pre-shipment inspection (PSI). If there is an issue with A1393SEHLX-T, 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 A1393SEHLX-T part is unused and in its original packaging.
Return procedure for A1393SEHLX-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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