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Diodes Incorporated AH3724Q-W-7
- Part No.:
- AH3724Q-W-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AH3724Q-W-7.pdf
- Description:
- HALL LATCH SWITCH SC59 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:1,772
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Product details
Overview
AH3724Q-W-7 from Diodes Incorporated is an AEC-Q100 Grade 0 qualified, high-voltage bipolar Hall-effect latch IC designed for automotive position sensing and BLDC motor commutation. It operates from 3.0V to 28V, features BOP = 40 G (typ), BRP = −40 G (typ), and delivers open-drain output switching with 30–55 mA current limit in SC59 package. Used in throttle position sensors and EPS motor rotor angle detection.
For engineers reviewing the AH3724Q-W-7 datasheet, AH3724Q-W-7 pinout, AH3724Q-W-7 application, or AH3724Q-W-7 equivalent, key selection criteria include magnetic sensitivity hysteresis (80 G typ), −40°C to +150°C operation, chopper-stabilized offset cancellation, and reverse supply protection up to −18 V.
Technical Context
The AH3724Q-W-7 implements a chopper-stabilized architecture with dynamic offset cancellation to suppress thermal drift and mechanical stress-induced errors. Its internal bandgap regulator supplies temperature-compensated bias to analog blocks, enabling stable BOP/BRP thresholds across −40°C to +150°C.
Magnetic response is bipolar latching: South pole applied to the marked side (SOT23/SIP-3) or unmarked side (SC59) switches output low; North pole reversal releases it. The single open-drain output includes overcurrent limiting and zener clamping for robustness in noisy 12 V/24 V automotive rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3.0 V to 28 V - supports direct connection to automotive battery rails including load-dump transients |
| Operating Temperature | −40°C to +150°C - qualified for under-hood and transmission-mounted applications |
| BOP / BRP (typ) | +40 G / −40 G - enables precise angular position detection with 80 G hysteresis for noise immunity |
| Output Type | Open-drain with 30–55 mA current limit - interfaces directly with 3.3 V/5 V/12 V microcontrollers via external pull-up |
| Startup Time | 10 µs (typ) - ensures fast system readiness after power-on reset in safety-critical timing loops |
| ESD Rating | HBM: 8 kV, CDM: 1 kV - meets stringent automotive ESD immunity requirements per ISO 10605 |
| Reverse Supply Protection | −18 V - integrated blocking diode prevents damage during battery polarity reversal |
Pinout & Package
Supplied in SC59 package (3-pin, surface-mount), compatible with standard SOT-23 footprint. Pin 1: VDD (supply input), Pin 2: GND (ground reference), Pin 3: OUTPUT (open-drain output).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VDD | Power input with integrated reverse-blocking diode and zener clamp (28 V) |
| 2 | GND | Ground reference for internal regulator and output stage; requires low-impedance PCB return path |
| 3 | OUTPUT | Open-drain output with 30–55 mA current limit; requires external pull-up resistor (1–10 kΩ typical) |
Key Features
| Feature | Design Value |
|---|---|
| Chopper stabilization | Reduces offset drift to <±0.1 G/°C, enabling stable switching points across full temperature range |
| Bipolar latching logic | South pole activates, North pole releases - eliminates need for external polarity control in rotary encoders |
| Integrated supply protection | Reverse-blocking diode + zener clamp sustains −18 V reverse bias without external components |
| High ESD immunity | 8 kV HBM rating allows handling in non-ESD-controlled assembly environments without additional protection |
| AEC-Q100 Grade 0 qualification | Validated for 150°C junction operation and PPAP-capable manufacturing in IATF 16949 facilities |
Applications
| Throttle Position Sensing | EPS Motor Rotor Angle Detection |
|---|---|
Use Scenario: Contactless measurement of accelerator pedal angle in gasoline/diesel powertrain control units. IC Role / Device Role / Timing Role: Hall latch provides digital on/off signal synchronized to magnet rotation on throttle shaft. Use Value: Eliminates potentiometer wear-out; 40 G operate point ensures reliable actuation with small, low-cost magnets. |
Use Scenario: Rotor position feedback for electric power steering (EPS) brushless DC motor commutation. IC Role / Device Role / Timing Role: Latched output triggers six-step commutation sequence in motor gate driver IC. Use Value: 10 µs startup time enables immediate torque response at vehicle ignition; 80 G hysteresis rejects vibration-induced false triggers. |
| Transmission Gear Selector | Brake Pedal Position Monitoring |
Use Scenario: Gear position detection in automatic transmission shift-by-wire systems. IC Role / Device Role / Timing Role: Detects discrete magnet positions on selector lever cam for P/R/N/D status reporting. Use Value: −40°C to +150°C rating ensures function during cold cranking and hot soak; open-drain output simplifies interface to 5 V CAN transceiver logic. |
Use Scenario: Redundant brake pedal travel sensing for ADAS emergency braking activation. IC Role / Device Role / Timing Role: Dual-latch configuration (with companion device) provides fail-safe position confirmation. Use Value: 3.0 V minimum supply allows operation during battery brownout; zener-clamped output prevents latch-up during EMI bursts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bipolar Hall latch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AL3724QW-7 | Same pinout and sensitivity (BOP/BRP = 40G/−40G), but uses different die revision and test flow; identical electrical specs. | No functional difference; approved for same AEC-Q100 Grade 0 applications and PPAP documentation. | Select when AL3724QW-7 is preferred in existing BOMs or dual-sourcing programs. |
| TLE4961-2M | Higher supply range (4.5–30 V), lower sensitivity (BOP = 5 mT), and integrated pull-up; not pin-compatible. | Requires PCB redesign; suited for higher-noise engine bay locations due to built-in EMI filtering. | Choose only if system-level EMI margin is insufficient with external RC filtering on AH3724Q-W-7. |
Compared with AL3724QW-7, AH3724Q-W-7 offers identical performance with Diodes Incorporated's validated production lot traceability; versus TLE4961-2M, it trades integrated pull-up for lower quiescent current (3 mA vs. 5.5 mA) and broader voltage flexibility down to 3.0 V.
Availability
AH3724Q-W-7 is available at Aetrix Electronics and suitable for automotive throttle control, EPS motor commutation, transmission gear sensing, and brake pedal monitoring requiring stable component supply across extended temperature and voltage ranges.
Supply support for AH3724Q-W-7 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 and industrial solutions with IATF 16949-certified fabrication and test facilities.
The AH372XQ series targets automotive position sensing and motor control, delivering AEC-Q100 Grade 0 latches optimized for harsh-environment reliability, wide supply range, and chopper-stabilized magnetic accuracy.
FAQ
What is the magnetic polarity requirement for AH3724Q-W-7 activation?
The AH3724Q-W-7 requires a South pole applied to the part marking side for SC59 package variants. This activates the output (pulls low); reversal to North pole releases it. Polarity orientation is reversed for SOT23 and SIP-3 packages-always verify package-specific polarity per DS46144 Figure 1.
Does AH3724Q-W-7 require an external capacitor on VDD?
Yes-a 10 nF to 100 nF ceramic capacitor (CIN) is required between VDD and GND to stabilize the internal regulator and improve RF noise immunity. Diodes Incorporated specifies 0.1 µF as optimal in the recommended operating circuit; placement within 2 mm of the VDD pin is critical for EMI suppression.
Can AH3724Q-W-7 operate at 2.8 V supply?
No. The absolute minimum functional supply voltage is 3.0 V per Recommended Operating Conditions. At 2.8 V, the internal bandgap regulator cannot maintain stable bias, resulting in undefined output state and potential failure to latch. System design must guarantee ≥3.0 V under all conditions including cold-cranking dips.
Is AH3724Q-W-7 pin-compatible with AH3722Q or AH3723Q?
Yes-AH3724Q-W-7 shares identical SC59 package, pinout (VDD-GND-OUTPUT), and electrical interface with other AH372XQ variants. Only magnetic thresholds differ: AH3722Q (25 G/−25 G), AH3723Q (30 G/−30 G), AH3724Q (40 G/−40 G). Direct replacement is valid if system magnet strength aligns with target BOP/BRP.
AH3724Q-W-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Latch, Bipolar Switch
- Technology:
- Hall Effect
- Polarization:
- North Pole, South Pole
- Sensing Range:
- ±6mT Trip, ±0.5mT Release
- Test Condition:
- 25°C
- Voltage - Supply:
- 2.2V ~ 20V
- Current - Supply (Max):
- 4mA
- Current - Output (Max):
- 25mA
- Output Type:
- Digital
- Features:
- Temperature Compensated
- Operating Temperature:
- -40°C ~ 150°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-59-3
AH3724Q-W-7 FAQ
1.How can I place an order for AH3724Q-W-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AH3724Q-W-7 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 AH3724Q-W-7 reliable?
The price and inventory of AH3724Q-W-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AH3724Q-W-7 is usually 5 days.
3.What payment methods are accepted for AH3724Q-W-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH3724Q-W-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH3724Q-W-7?
AH3724Q-W-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH3724Q-W-7 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 AH3724Q-W-7?
For technical support, including AH3724Q-W-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH3724Q-W-7 requirements.
6.How does Aetrix verify that AH3724Q-W-7 is sourced from the original manufacturer or authorized distributors?
All AH3724Q-W-7 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 AH3724Q-W-7 meets industry standards.
7.What is the process for return or replacement of AH3724Q-W-7?
All AH3724Q-W-7 units undergo pre-shipment inspection (PSI). If there is an issue with AH3724Q-W-7, 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 AH3724Q-W-7 part is unused and in its original packaging.
Return procedure for AH3724Q-W-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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