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Diodes Incorporated AH3714Q-P-B
- Part No.:
- AH3714Q-P-B
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- -
- Datasheet:
-
AH3714Q-P-B.pdf
- Description:
- HALL LATCH SWITCH SIP-3 BULK 1K
- Quantity:
- Payment:
- Shipping:
Inventory:1,000
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Product details
Overview
AH3714Q-P-B from Diodes Incorporated is an AEC-Q100 Grade 0 qualified automotive Hall-effect latch IC designed for brushless DC motor commutation and angular position sensing. It operates from 3.0V to 27V, features ±40G typical operate/release points (BOP/BRP), open-drain output with 60mA current limit, and chopper-stabilized architecture for stable switching across −40°C to +150°C.
For engineers reviewing the AH3714Q-P-B datasheet, AH3714Q-P-B pinout, AH3714Q-P-B application, or AH3714Q-P-B equivalent, key selection criteria include magnetic sensitivity tolerance (±40G typ), load-dump robustness (40V transient), reverse-battery protection (−18V), and SIP-3 package compatibility with high-temperature automotive PCB layouts.
Technical Context
The AH3714Q-P-B implements a chopper-stabilized bipolar latch architecture with dynamic offset cancellation, delivering minimal switch-point drift (<±0.5G/°C) and superior immunity to mechanical stress and RF noise. Its internal bandgap regulator supplies temperature-compensated bias to analog blocks, enabling consistent BOP/BRP performance across voltage (3–27V) and temperature (−40°C to +150°C).
Magnetic polarity response is package-dependent: South pole activates the output when applied to the part-marking side for SIP-3 (Bulk Pack) and SOT23 (Type S), but to the non-marking side for SC59. The single open-drain output latches on at BOP and releases only after field reversal crosses BRP, providing hysteresis of 40–120G (typ 80G).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3.0V to 27V - supports direct connection to automotive battery rails including cold-crank (≥3V) and load-dump transients (up to 40V non-operational) |
| Operating Temperature | −40°C to +150°C - qualified for under-hood and transmission-control module environments per AEC-Q100 Grade 0 |
| BOP / BRP (Typ) | +40G / −40G - enables reliable detection of weak magnetic fields from small magnets or large air gaps in motor rotors |
| Output Type | Open-drain with 60mA sink capability - interfaces directly with 3.3V/5V/12V microcontrollers and supports pull-up to any rail ≤27V |
| Hysteresis (BHY) | 80G typical - prevents chatter during slow or noisy magnetic transitions, critical for RPM measurement accuracy |
| Startup Time | 13µs typical - ensures fast system readiness after power-on, supporting real-time motor control loops |
| ESD Robustness | HBM 8kV, CDM 1kV - withstands handling and assembly stresses without external protection components |
Pinout & Package
SIP-3 (Bulk Pack) package: straight-lead, through-hole mounting optimized for high-reliability automotive PCBs with thermal mass and vibration resistance. Pin 1 = VDD, Pin 2 = GND, Pin 3 = OUTPUT.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VDD | Power input with integrated reverse-blocking diode and 36V Zener clamp - tolerates −18V reverse battery and 40V load dump |
| 2 | GND | Ground reference for internal regulator and output stage - requires low-impedance PCB plane for EMI suppression |
| 3 | OUTPUT | Open-drain NMOS output with 60mA current limit and Zener clamp - sinks current when B > +40G, latched until B < −40G |
Key Features
| Feature | Design Value |
|---|---|
| Chopper-stabilized architecture | Reduces thermal drift of BOP/BRP to <±0.5G/°C and eliminates offset-induced false triggers in high-vibration environments |
| 40V load-dump protection | Withstands ISO 7637-2 Pulse 5a transients without external TVS, reducing BOM count in engine-control modules |
| Reverse-battery protection | Integrated −18V blocking diode eliminates need for external series diode in battery-connected applications |
| High-temperature operation | Validated operation up to +150°C ambient with derated power dissipation (550mW @ 25°C, 0mW @ 150°C for SIP-3) |
| RF noise immunity | Passes ISO 11452-2 radiated immunity testing up to 1000MHz at 100V/m - suitable for proximity to ignition systems and inverters |
Applications
| Brushless DC Motor Commutation | RPM Measurement |
|---|---|
|
Use Scenario: Detecting rotor magnet position in 12V/24V BLDC fans, pumps, and HVAC blowers. IC Role / Device Role / Timing Role: Bipolar latch provides edge-triggered, hysteresis-protected commutation signals synchronized to mechanical rotation. Use Value: Enables precise 6-step commutation with <1° electrical angle error over full temperature range, eliminating timing jitter from thermal drift. |
Use Scenario: Measuring rotational speed of crankshafts, camshafts, and wheel hubs in engine management and ABS systems. IC Role / Device Role / Timing Role: Generates clean, debounced pulse train proportional to shaft speed; output frequency scales linearly with RPM. Use Value: Delivers sub-millisecond startup latency (13µs) and stable pulse edges for accurate frequency-to-digital conversion in MCU timer capture peripherals. |
| Flow Meter Sensing | Angular Position Indexing |
|
Use Scenario: Monitoring turbine or paddle-wheel rotation in fuel, coolant, and brake-fluid flow meters. IC Role / Device Role / Timing Role: Latching output toggles per magnet passage, converting mechanical flow into digital pulse count. Use Value: High sensitivity (±40G typ) allows use with small, low-cost magnets and large air gaps-reducing mechanical alignment constraints and calibration effort. |
Use Scenario: Detecting gear tooth or cam lobe position for cylinder identification and valve timing in variable valve timing (VVT) actuators. IC Role / Device Role / Timing Role: Provides deterministic, polarity-aware switching aligned to physical index marks on rotating components. Use Value: 80G hysteresis prevents double-counting during slow or oscillating motion, ensuring unambiguous cylinder #1 identification at cranking speeds. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Hall-effect latch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AL3714QSA-7 | Same magnetic thresholds (±40G), but in SOT23-3 (Type S) package with reversed polarity orientation (South pole to marking side) | Requires re-layout for surface-mount assembly; lacks SIP-3's thermal mass and mechanical retention for high-vibration zones | Select for space-constrained PCBs where through-hole mounting is impractical and vibration exposure is moderate |
| TLE4961-2M | Higher supply range (4.5–36V), lower sensitivity (±60G min), integrated reverse-polarity protection, but no load-dump rating | Not AEC-Q100 Grade 0 qualified; rated only to +125°C junction - unsuitable for under-hood transmission control units | Choose only for non-critical cabin applications where extended temperature range and 40V transient immunity are not required |
Compared with AL3714QSA-7 and TLE4961-2M, the AH3714Q-P-B uniquely combines SIP-3 mechanical robustness, Grade 0 temperature qualification, and explicit 40V load-dump survivability-making it the only option for high-reliability, high-temperature, high-transient automotive sensing nodes.
Availability
AH3714Q-P-B is available at Aetrix Electronics and suitable for brushless DC motor commutation, RPM measurement, and angular position indexing requiring stable component supply across automotive production lifecycles.
Supply support for AH3714Q-P-B 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 semiconductor company specializing in discrete, analog, and mixed-signal solutions for automotive, industrial, and computing markets, with IATF 16949-certified manufacturing.
The AH371xQ family targets automotive position and speed sensing, delivering AEC-Q100 Grade 0 reliability, wide-voltage operation, and package-specific magnetic polarity optimization for robust integration into powertrain and chassis systems.
FAQ
What is the magnetic polarity requirement for AH3714Q-P-B activation?
The AH3714Q-P-B in SIP-3 (Bulk Pack) package requires a South pole applied to the part-marking side to turn the output ON (low). It releases (high impedance) only when a North pole of sufficient strength (≤−40G) is applied to the same side. This polarity behavior is fixed for the SIP-3 variant and differs from SC59/SOT23 packages.
Can AH3714Q-P-B operate directly from a 24V truck battery without external protection?
Yes - AH3714Q-P-B integrates reverse-battery protection (−18V clamping) and survives 40V load-dump transients per ISO 7637-2. It operates continuously from 3.0V to 27V, making it suitable for direct connection to 24V systems without external TVS diodes or series regulators, provided the 27V upper limit is not exceeded during normal operation.
What is the maximum allowable pull-up resistor value for the open-drain output?
The output can drive loads up to 60mA sink current. With VDD = 27V and VOUT_ON ≤ 0.42V at 20mA, a 1kΩ pull-up yields ~26.6V logic-high level and <1µs fall time. For higher resistance, ensure VOUT_ON remains below the driven IC's VIH threshold; 10kΩ is viable for 3.3V logic if rise time <10µs is acceptable, but 1kΩ–4.7kΩ is recommended for automotive timing-critical uses.
How does chopper stabilization improve performance in high-temperature environments?
Chopper stabilization actively cancels input-stage offset voltage drift caused by temperature gradients and process variation. In AH3714Q-P-B, this reduces BOP/BRP drift to <±0.5G/°C - enabling stable switching at +150°C ambient without recalibration, unlike non-chopped Hall latches that may shift >5G over the same range and cause missed or false triggers.
AH3714Q-P-B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- -
- Technology:
- -
- Polarization:
- -
- Sensing Range:
- -
- Test Condition:
- -
- Voltage - Supply:
- -
- Current - Supply (Max):
- -
- Current - Output (Max):
- -
- Output Type:
- -
- Features:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
AH3714Q-P-B FAQ
1.How can I place an order for AH3714Q-P-B through Aetrix?
Please submit a Request for Quotation (RFQ) for AH3714Q-P-B 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 AH3714Q-P-B reliable?
The price and inventory of AH3714Q-P-B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AH3714Q-P-B is usually 5 days.
3.What payment methods are accepted for AH3714Q-P-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH3714Q-P-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH3714Q-P-B?
AH3714Q-P-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH3714Q-P-B 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 AH3714Q-P-B?
For technical support, including AH3714Q-P-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH3714Q-P-B requirements.
6.How does Aetrix verify that AH3714Q-P-B is sourced from the original manufacturer or authorized distributors?
All AH3714Q-P-B 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 AH3714Q-P-B meets industry standards.
7.What is the process for return or replacement of AH3714Q-P-B?
All AH3714Q-P-B units undergo pre-shipment inspection (PSI). If there is an issue with AH3714Q-P-B, 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 AH3714Q-P-B part is unused and in its original packaging.
Return procedure for AH3714Q-P-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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