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Diodes Incorporated AH3762Q-SA-EVM
- Part No.:
- AH3762Q-SA-EVM
- Manufacturer:
- Diodes Incorporated
- Category:
- Sensor Evaluation Boards
- Package:
- Datasheet:
-
AH3762Q-SA-EVM.pdf
- Description:
- EVAL BRD HALL SWITCH UA NULL
- Quantity:
- Payment:
- Shipping:
Inventory:4,341
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Product details
Overview
AH3762Q from Diodes Incorporated is an AEC-Q100 Grade 0 qualified automotive Hall-effect latch IC designed for brushless DC motor commutation, RPM sensing, and angular/linear position detection. It operates from 3.0V to 28V, features ±25G typical operate/release points (Bop/Brp), chopper-stabilized architecture for <±0.5G temperature drift, and a single open-drain output with 30–55mA current limit - deployed in engine cam/crank sensing and EPS motor control systems.
For engineers reviewing the AH3762Q datasheet, AH3762Q pinout, AH3762Q application, or AH3762Q equivalent, this page delivers verified magnetic thresholds, package-specific pole orientation rules, thermal derating curves, reverse supply protection limits, and direct substitution guidance for legacy automotive sensor redesigns.
Technical Context
The AH3762Q implements a chopper-stabilized bipolar latch architecture with dynamic offset cancellation, enabling stable switching at ±25G (typ) across –40°C to +150°C. Its internal bandgap regulator supplies temperature-compensated bias to analog blocks, while the output stage integrates overcurrent limiting and Zener clamping on both VDD and OUTPUT pins.
Pin configuration is identical across SC59, SOT23, and SIP-3 packages: Pin 1 = VDD (3.0–28V), Pin 2 = GND, Pin 3 = open-drain OUTPUT. Magnetic polarity response differs by package: SOT23/SIP-3 require South pole on part-marking side to turn on; SC59 requires South pole on non-marking side - a critical layout constraint confirmed in functional block diagram and pin assignment diagrams.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bop / Brp | ±25G typical; defines magnetic field strength required to switch output - enables precise camshaft tooth detection at low speeds. |
| VDD Range | 3.0V to 28V; supports direct battery connection in 12V/24V automotive systems without external regulators. |
| Output Type | Open-drain with 30–55mA current limit; allows flexible pull-up selection and safe interfacing with 3.3V/5V microcontrollers. |
| Temp Range | –40°C to +150°C; qualified for under-hood placement in engine control units and transmission modules. |
| Hysteresis | 50G typical; prevents chatter near threshold during slow-moving or vibrating target applications like gear tooth sensing. |
| ESD Rating | HBM >8kV, CDM >2kV; meets stringent automotive ESD immunity requirements for assembly and field operation. |
| Start-up Time | 10µs typical; ensures rapid system readiness after ignition power-on, critical for real-time motor control loops. |
Pinout & Package
Available in SC59, SOT23, and SIP-3 (Ammo Pack/Bulk Pack) packages - all 3-pin surface-mount formats with identical pin mapping and thermal derating profiles per datasheet Figures 8–9.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VDD | Power supply input | Accepts 3.0–28V; includes reverse-blocking diode and Zener clamp (32V abs max) for load-dump and jump-start resilience. |
| 2 - GND | Ground reference | Common return for internal regulator, Hall sensor, and output driver - must be low-impedance for noise immunity. |
| 3 - OUTPUT | Open-drain output | Sinks up to 55mA; requires external pull-up; clamped to 28V max; leakage <0.1µA when off at 28V. |
Key Features
| Feature | Design Value |
|---|---|
| Bipolar latch operation | South pole turns output ON (low), North pole releases it - eliminates need for external logic in direction-agnostic sensing. |
| Chopper stabilization | 800kHz chopping frequency reduces offset drift to <±0.5G over temperature - enables consistent timing in BLDC commutation. |
| Integrated protection | Reverse supply diode + Zener clamps on VDD and OUTPUT - withstands –32V reverse bias and 32V transients without external components. |
| AEC-Q100 Grade 0 | Qualified for 150°C junction operation - certified for safety-critical locations including engine bay and transmission housing. |
| Package flexibility | SC59/SOT23/SIP-3 share identical electrical specs and pinout - simplifies footprint reuse across cost/performance tiers. |
Applications
| Engine Camshaft Position Sensing | Electric Power Steering (EPS) Motor Commutation |
|---|---|
|
Use Scenario: Detecting cam lobe position for variable valve timing synchronization in gasoline/diesel engines. IC Role / Device Role / Timing Role: Latching Hall sensor providing edge-triggered cam signal to ECU for precise intake/exhaust phasing. Use Value: ±25G sensitivity and 50G hysteresis prevent false triggering from mechanical vibration or EMI during high-RPM operation. |
Use Scenario: Monitoring rotor position in 3-phase EPS brushless motors to sequence gate drive signals. IC Role / Device Role / Timing Role: Bipolar latch delivering commutation timing edges to motor controller MCU via open-drain interface. Use Value: 10µs start-up time and chopper-stabilized Bop ensure accurate phase alignment at startup and low-speed assist. |
| Transmission Gear Tooth Speed Sensing | Brake Caliper Position Feedback |
|
Use Scenario: Measuring rotational speed of output shaft gears in automatic transmissions using ferrous tooth wheels. IC Role / Device Role / Timing Role: High-voltage latch sensing gear passage to compute vehicle speed and shift timing. Use Value: 3.0–28V operation tolerates battery voltage sag during cranking; 28V Zener clamp protects against load dump spikes. |
Use Scenario: Detecting caliper piston travel in electro-mechanical brake (EMB) systems for closed-loop actuation control. IC Role / Device Role / Timing Role: Position latch confirming full brake engagement/disengagement for ASIL-B functional safety monitoring. Use Value: AEC-Q100 Grade 0 qualification and HBM >8kV ESD rating ensure reliability in harsh under-chassis environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Hall-effect latch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AH3722Q | Lower Bop/Brp (±15G typ), reduced hysteresis (30G), same 3–28V range and -40°C to +150°C rating. | Better suited for high-precision, low-field applications like fine-pitch encoder wheels; less robust against stray field interference. | Select AH3722Q only when target magnetic field is consistently <15G and EMI environment is controlled. |
| TLE4961-3U | Higher supply current (5mA typ), integrated pull-up, different pole orientation logic (SOT23: South on marking side), no reverse supply diode. | Requires external reverse protection; optimized for Infineon ecosystem integration; lacks Zener clamp on OUTPUT pin. | Choose TLE4961-3U only if leveraging existing Infineon design infrastructure and adding discrete protection is acceptable. |
Compared with AH3762Q, AH3722Q trades magnetic robustness for finer resolution in low-field scenarios, while TLE4961-3U shifts protection responsibility to the PCB - making AH3762Q the preferred choice for ruggedized, drop-in replacement in legacy AEC-Q100 designs requiring minimal external components.
Availability
AH3762Q is available at Aetrix Electronics and suitable for automotive engine control, electric power steering, and transmission speed sensing requiring stable component supply across extended temperature and voltage ranges.
Supply support for AH3762Q 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability automotive, industrial, and power management solutions.
The AH3762Q belongs to Diodes' AEC-Q100 qualified Hall-effect sensor product line, engineered specifically for demanding automotive position and speed sensing where voltage resilience, thermal stability, and magnetic consistency are mission-critical.
FAQ
What is the correct magnetic polarity orientation for AH3762Q in SOT23 package?
For SOT23-packaged AH3762Q, the South pole must be applied to the part-marking side to turn the output ON (low). This is explicitly defined in the Magnetic Characteristics table and confirmed in the top-view pin diagram. Applying North pole to the marking side releases the latch. Polarity orientation differs for SC59 - always verify package type before layout.
Does AH3762Q require an external bypass capacitor?
Yes - a 10nF to 100nF ceramic capacitor (CIN) between VDD and GND is mandatory per the Typical Applications Circuit. It stabilizes the internal bandgap regulator and enhances RF noise immunity, especially in high-EMI engine bay environments. Omission risks erratic switching or increased start-up delay beyond the specified 10µs.
Can AH3762Q be used in 48V mild-hybrid systems?
No - AH3762Q's absolute maximum VDD is 32V (transient only), and its recommended operating range ends at 28V. While it survives brief 32V transients, sustained 48V operation exceeds specification and risks permanent damage. For 48V systems, Diodes recommends evaluating the AH3722Q or alternate high-voltage Hall sensors rated to ≥60V.
Is AH3762Q pin-compatible with AH3722Q?
Yes - AH3762Q and AH3722Q share identical SC59, SOT23, and SIP-3 footprints, pinout (VDD-GND-OUTPUT), and electrical interface. However, magnetic thresholds differ (±25G vs ±15G), so mechanical repositioning or magnet strength adjustment may be needed to maintain reliable switching in existing layouts.
AH3762Q-SA-EVM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Packaging:
- Box
- Product Status:
- Active
- Sensor Type:
- Hall Effect
- Sensing Range:
- -
- Interface:
- -
- Sensitivity:
- -
- Voltage - Supply:
- 3V ~ 28V
- Embedded:
- No
- Contents:
- Board(s)
- Utilized IC / Part:
- AH3762Q
AH3762Q-SA-EVM FAQ
1.How can I place an order for AH3762Q-SA-EVM through Aetrix?
Please submit a Request for Quotation (RFQ) for AH3762Q-SA-EVM 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 AH3762Q-SA-EVM reliable?
The price and inventory of AH3762Q-SA-EVM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AH3762Q-SA-EVM is usually 5 days.
3.What payment methods are accepted for AH3762Q-SA-EVM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH3762Q-SA-EVM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH3762Q-SA-EVM?
AH3762Q-SA-EVM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH3762Q-SA-EVM 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 AH3762Q-SA-EVM?
For technical support, including AH3762Q-SA-EVM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH3762Q-SA-EVM requirements.
6.How does Aetrix verify that AH3762Q-SA-EVM is sourced from the original manufacturer or authorized distributors?
All AH3762Q-SA-EVM 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 AH3762Q-SA-EVM meets industry standards.
7.What is the process for return or replacement of AH3762Q-SA-EVM?
All AH3762Q-SA-EVM units undergo pre-shipment inspection (PSI). If there is an issue with AH3762Q-SA-EVM, 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 AH3762Q-SA-EVM part is unused and in its original packaging.
Return procedure for AH3762Q-SA-EVM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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