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Diodes Incorporated AH3715Q-P-B
- Part No.:
- AH3715Q-P-B
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- 3-SIP
- Datasheet:
-
AH3715Q-P-B.pdf
- Description:
- HALL LATCH SWITCH SIP-3 BULK 1K
- Quantity:
- Payment:
- Shipping:
Inventory:1,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AH3715Q-P-B from Diodes Incorporated is an AEC-Q100 Grade 0 qualified automotive Hall-effect latch IC in SIP-3 (Bulk Pack) package, designed for brushless DC motor commutation and angular position sensing. It operates from 3.0V to 27V, features ±50G to ±90G magnetic operate/release points (BOP/BRP), 140G typical hysteresis, open-drain output with 30–60mA current limit, and supports –40°C to +150°C ambient operation.
For engineers reviewing the AH3715Q-P-B datasheet, AH3715Q-P-B pinout, AH3715Q-P-B application, or AH3715Q-P-B equivalent, this device delivers robust bipolar latching behavior with chopper-stabilized temperature stability, 40V load dump protection, and polarity-specific mounting guidance for SIP-3 packages-critical for automotive RPM measurement and contactless position indexing.
Technical Context
The AH3715Q employs a chopper-stabilized architecture with dynamic offset cancellation and internal bandgap regulation to maintain stable magnetic thresholds across temperature and supply voltage variations. Its bipolar latch function toggles the open-drain output low when South pole flux exceeds +50G (BOP) and holds until North pole flux drops below –50G (BRP), delivering 140G typical hysteresis for noise immunity.
It integrates reverse-blocking diode and Zener clamp on VDD, overcurrent-limited output stage, and ESD protection (8kV HBM, 1kV CDM). The device starts up in 13µs after VDD reaches 3V and maintains <0.42V output saturation at 20mA sink current across its full operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3.0V to 27V - supports direct battery connection in 12V/24V automotive systems without external regulation |
| Operating Temperature | –40°C to +150°C - qualified for under-hood and transmission-mounted applications |
| BOP / BRP | +50G to +90G / –90G to –50G - enables reliable switching in moderate-field environments like BLDC rotor position detection |
| Hysteresis (BHY) | 100G to 180G typical - suppresses chatter in noisy magnetic fields near threshold transitions |
| Output Type | Open-drain with 30–60mA current limit - compatible with standard pull-up resistors and tolerant of short-circuit faults |
| Load Dump Protection | 40V transient rating - withstands ISO 7637-2 Pulse 5a surges without external clamping |
| Startup Time | 13µs typical - ensures rapid system readiness after power-on reset in engine control modules |
Pinout & Package
SIP-3 (Bulk Pack) package with straight leads, optimized for through-hole mounting in high-vibration automotive modules. Thermal performance supports 550mW at 25°C ambient, derating to 0mW at +150°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VDD | Power supply input with integrated reverse-blocking diode and 36V Zener clamp for fault tolerance |
| 2 | GND | Ground reference for internal regulator and output stage; requires low-impedance PCB return path |
| 3 | OUTPUT | Open-drain output with 30–60mA current limit; requires external pull-up resistor (RL) for logic-level interface |
Key Features
| Feature | Design Value |
|---|---|
| Bipolar Latch Logic | South pole activates output (low), North pole releases - eliminates need for external polarity inversion in encoder wheels |
| Chopper-Stabilized Core | Reduces switch-point drift to <±0.5G/°C - ensures consistent timing accuracy across engine temperature cycles |
| Magnetic Polarity Mapping | South pole to part-marking side for SIP-3 - simplifies mechanical integration in space-constrained sensor housings |
| RF Noise Immunity | Validated per ISO 11452-2 - maintains clean switching in proximity to ignition coils and inverters |
| AEC-Q100 Grade 0 | Qualified to +150°C junction temperature - certified for safety-critical drivetrain and chassis control functions |
Applications
| BLDC Motor Commutation | RPM Measurement |
|---|---|
|
Use Scenario: Detecting rotor magnet position in 12V/24V automotive fan, pump, or EPS motors. IC Role / Device Role / Timing Role: Provides digital commutation signals synchronized to magnet pole transitions for precise 6-step drive sequencing. Use Value: Enables efficient, low-noise motor control with 13µs startup latency and 140G hysteresis to reject vibration-induced false triggers. |
Use Scenario: Measuring rotational speed of crankshaft, camshaft, or wheel ABS rings. IC Role / Device Role / Timing Role: Generates clean, jitter-free pulse train proportional to shaft speed via magnetic pole counting. Use Value: Delivers sub-microsecond timing resolution (10µs delay from threshold crossing) and 40V surge resilience for direct battery-fed installations. |
| Flow Meter Sensing | Angular Position Indexing |
|
Use Scenario: Monitoring turbine rotation in fuel, oil, or coolant flow meters within engine bays. IC Role / Device Role / Timing Role: Converts rotating vane or impeller motion into digital pulses for volumetric flow calculation. Use Value: Maintains stable BOP/BRP over –40°C to +150°C with <0.42V output saturation, ensuring accurate low-speed pulse detection. |
Use Scenario: Detecting gear tooth or cam lobe position for cylinder identification and valve timing in ICE management. IC Role / Device Role / Timing Role: Acts as a zero-speed-capable position index sensor with latched output for deterministic edge alignment. Use Value: Leverages ±50G to ±90G sensitivity range and polarity-specific mounting to resolve fine angular increments in compact packaging. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Hall-effect latch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AL3715QSA-7 | SOT23-3 (Type S) package; same BOP/BRP specs but requires South pole to part-marking side - different mechanical orientation | Preferred for surface-mount PCBs with space constraints; not suitable for through-hole or high-vibration bulk-pack assemblies | Select when board real estate is limited and reflow compatibility is required; verify mounting polarity against SOT23 marking convention. |
| US1881LUA-AB | Lower sensitivity (BOP ±35G typ); no AEC-Q100 Grade 0 qualification; 3.3V–24V supply range | Targeted at non-safety-critical consumer or industrial encoders; lacks 40V load dump and 150°C operation | Choose only for cost-sensitive, non-automotive designs where Grade 0 qualification and extended temperature margin are unnecessary. |
Compared with AL3715QSA-7 and US1881LUA-AB, the AH3715Q-P-B uniquely combines SIP-3 mechanical robustness, AEC-Q100 Grade 0 certification, and ±50G–±90G field sensitivity-making it the sole option for through-hole, high-reliability automotive position sensing where thermal derating and vibration resistance are mandatory.
Availability
AH3715Q-P-B is available at Aetrix Electronics and suitable for brushless DC motor commutation, RPM measurement, and angular position indexing requiring stable component supply in automotive production programs.
Supply support for AH3715Q-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 manufacturer specializing in discrete, analog, and mixed-signal solutions for automotive, industrial, and computing markets.
The AH371xQ series belongs to Diodes' AEC-Q100-qualified Hall-effect sensor product line, engineered specifically for demanding automotive position and speed sensing applications with emphasis on thermal stability, EMC resilience, and mechanical mounting flexibility.
FAQ
What is the correct magnetic polarity orientation for AH3715Q-P-B in SIP-3 package?
For the SIP-3 (Bulk Pack) variant, a South pole must be applied to the part-marking side to activate the output. This differs from SC59 and SOT23 variants, which require South pole on the non-marking side. Mounting orientation directly affects functional correctness and must be verified during mechanical integration.
Does AH3715Q-P-B require an external bypass capacitor?
Yes - a 10nF to 100nF ceramic capacitor (CIN) between VDD and GND is recommended per the datasheet to stabilize the supply and enhance RF noise immunity. Omitting CIN may degrade startup reliability and increase susceptibility to conducted transients in automotive electrical environments.
Can AH3715Q-P-B operate reliably at 27V continuous supply?
Yes - 27V is within the specified recommended operating range (3.0V to 27V). The 40V absolute maximum rating applies only to transient load dump events (per ISO 7637-2), not continuous operation. At 27V, supply current remains ≤4.8mA and output saturation stays ≤0.42V at 20mA load.
How does the chopper-stabilized architecture improve performance in automotive environments?
The chopper-stabilized design actively cancels offset voltage drift caused by temperature gradients and mechanical stress, reducing BOP/BRP variation to <±0.5G/°C. This ensures consistent switching thresholds across engine warm-up cycles and under hood vibration - critical for repeatable timing in BLDC commutation and crankshaft position sensing.
AH3715Q-P-B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 3-SIP
- 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:
- Through Hole
- Supplier Device Package:
- 3-SIP
AH3715Q-P-B FAQ
1.How can I place an order for AH3715Q-P-B through Aetrix?
Please submit a Request for Quotation (RFQ) for AH3715Q-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 AH3715Q-P-B reliable?
The price and inventory of AH3715Q-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 AH3715Q-P-B is usually 5 days.
3.What payment methods are accepted for AH3715Q-P-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH3715Q-P-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH3715Q-P-B?
AH3715Q-P-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH3715Q-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 AH3715Q-P-B?
For technical support, including AH3715Q-P-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH3715Q-P-B requirements.
6.How does Aetrix verify that AH3715Q-P-B is sourced from the original manufacturer or authorized distributors?
All AH3715Q-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 AH3715Q-P-B meets industry standards.
7.What is the process for return or replacement of AH3715Q-P-B?
All AH3715Q-P-B units undergo pre-shipment inspection (PSI). If there is an issue with AH3715Q-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 AH3715Q-P-B part is unused and in its original packaging.
Return procedure for AH3715Q-P-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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