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Diodes Incorporated AH3716-P-B
- Part No.:
- AH3716-P-B
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- -
- Datasheet:
-
AH3716-P-B.pdf
- Description:
- HALL LATCH SWITCH SIP-3 BULK 1K
- Quantity:
- Payment:
- Shipping:
Inventory:990
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Product details
Overview
AH3716-P-B from Diodes Incorporated is a high-voltage bipolar Hall-effect latch IC designed for brushless DC motor commutation and position sensing in industrial appliances and personal care devices. It operates from 3.0V to 27V, features ±80G to ±140G magnetic operate/release points (BOP/BRP), open-drain output with 60mA current limit, and chopper-stabilized architecture for stable switching across −40°C to +125°C.
For engineers reviewing the AH3716-P-B datasheet, AH3716-P-B pinout, AH3716-P-B application, or AH3716-P-B equivalent, this device is selected for robust magnetic sensing in high-temperature, high-voltage environments where latch polarity (South-on/North-off), load-dump immunity, and RF noise resilience are critical.
Technical Context
The AH3716-P-B implements a chopper-stabilized Hall sensor with dynamic offset cancellation, enabling minimal switch-point drift over temperature and supply voltage. Its internal bandgap regulator supplies temperature-compensated bias to analog circuitry, ensuring consistent BOP/BRP thresholds across the full −40°C to +125°C range.
It uses a single open-drain output stage with integrated overcurrent limiting (30–60mA) and 40V transient load-dump protection. Magnetic hysteresis is fixed at 160–280G, preventing chatter during slow-field transitions in rotary or linear encoder applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 3.0V to 27V - supports direct connection to 12V/24V industrial rails without external regulation. |
| BOP / BRP | ±80G / ±140G typical - enables reliable actuation with standard ferrite magnets at air gaps up to 2.5mm. |
| Output Type | Open-drain - allows flexible pullup configuration (external or internal on A-version; AH3716-P-B is open-drain only). |
| Startup Time | 13µs typical - ensures rapid system readiness after power-on, critical for motor startup sequencing. |
| Operating Temp | −40°C to +125°C - qualified for under-hood, pump, and appliance motor control environments. |
| ESD Rating | HBM 8kV, CDM 1kV - withstands handling and board-level ESD events in automated assembly. |
| Load Dump | 40V transient rating - survives ISO 7637-2 pulse 5a surges in automotive-adjacent industrial systems. |
Pinout & Package
Package: SOT23 (Type S) - surface-mount, 3-pin, JEDEC-standard footprint compatible with automated placement and reflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VDD | Power supply input | Accepts 3.0–27V; includes internal bandgap regulator and reverse-battery protection (not applicable to AH3716). |
| 2 - GND | Ground reference | Return path for internal circuits and output sink current; must be low-impedance for stable switching. |
| 3 - OUTPUT | Open-drain output | Sinks up to 60mA; requires external pullup for logic-high state; latches until field polarity reversal crosses BRP. |
Key Features
| Feature | Design Value |
|---|---|
| Bipolar latch operation | South pole activates (output low), North pole releases (output high-impedance) - eliminates need for external polarity logic. |
| Chopper stabilization | 500kHz chopping frequency - reduces thermal drift of BOP/BRP to <±5G over full temperature range. |
| Magnetic hysteresis | 160–280G - prevents oscillation near threshold in noisy mechanical environments (e.g., BLDC rotor vibration). |
| RF noise immunity | Validated per IEC 61000-4-3 - maintains correct state during 10V/m radiated RF fields (80–1000MHz). |
| Overcurrent protection | 30–60mA hard current limit - protects output transistor during short-circuit or excessive pullup conditions. |
Applications
| BLDC Motor Commutation | RPM Measurement |
|---|---|
|
Use Scenario: Detecting rotor position in 3-phase brushless DC fans used in HVAC blowers and kitchen range hoods. IC Role / Device Role / Timing Role: Hall latch providing synchronized commutation signals to gate driver ICs, replacing mechanical brushes. Use Value: Enables precise 120° electrical phase alignment with rotor poles, reducing torque ripple and audible noise at 2,000–6,000 RPM. |
Use Scenario: Measuring rotational speed of water meter impellers in smart utility meters. IC Role / Device Role / Timing Role: Edge-triggered magnetic event counter feeding microcontroller timer capture inputs. Use Value: Delivers stable pulse output up to 20kHz with <1µs timing jitter, supporting ±0.5% flow accuracy over 10+ year field life. |
| Linear Position Sensing | Angular Encoder Indexing |
|
Use Scenario: Detecting end-of-travel positions in automatic soap dispensers and electric toothbrush chargers. IC Role / Device Role / Timing Role: Latched proximity switch confirming mechanical actuator reach at calibrated stroke endpoints. Use Value: Eliminates contact wear and bounce issues of mechanical microswitches while maintaining >1M cycle reliability. |
Use Scenario: Providing index pulse for absolute angular position in cordless power tool gearboxes. IC Role / Device Role / Timing Role: Zero-reference marker generator aligned to gear tooth count for multi-turn angle reconstruction. Use Value: Achieves sub-degree indexing accuracy using 12-pole ring magnet and 130G BOP tolerance to magnetization variance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Hall-effect latch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AL3716T (Allegro) | Wider BOP range (±70G to ±150G), same SOT23 package, but no load-dump rating. | Lacks 40V transient protection - unsuitable for 24V industrial systems with relay switching noise. | Select if operating strictly within 12V rails and requiring higher sensitivity margin. |
| DRV5013A2 (TI) | Higher supply range (2.7–38V), integrated 10kΩ pullup, but BOP/BRP tighter (±90G/±130G typical). | Fixed internal pullup limits interface flexibility; lower hysteresis increases susceptibility to vibration-induced chatter. | Choose when board space is constrained and external resistor omission is prioritized over field robustness. |
Compared with AL3716T and DRV5013A2, the AH3716-P-B delivers superior transient survivability and wider magnetic hysteresis-making it the preferred choice for high-reliability BLDC commutation and flow metering where environmental stress and mechanical resonance are present.
Availability
AH3716-P-B is available at Aetrix Electronics and suitable for brushless DC motor control, flow metering, and linear position sensing requiring stable component supply across extended temperature and voltage ranges.
Supply support for AH3716-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 ICs for industrial, computing, consumer, and automotive markets.
The AH371x series belongs to Diodes' high-voltage Hall-effect sensor product line, engineered specifically for robust magnetic position detection in harsh environments where wide supply range, thermal stability, and ESD resilience are mandatory.
FAQ
What is the magnetic polarity behavior of AH3716-P-B?
The AH3716-P-B is a bipolar latch: a South pole applied to the marked side of the SOT23 package switches the output low (active), and a North pole of sufficient strength releases it to high-impedance. This behavior is confirmed in DS46066 Rev. 1–2, page 5, and is intrinsic to its latch architecture-no configuration pins or external components alter polarity logic.
Does AH3716-P-B include an internal pullup resistor?
No. AH3716-P-B has an open-drain output only and requires an external pullup resistor. The internal pullup (10–18kΩ) is exclusive to the "A" variants (e.g., AH3716A). This distinction is explicitly stated in the Electrical Characteristics table (page 4) and Pin Descriptions (page 3) of DS46066.
Can AH3716-P-B operate from a 3.3V supply in low-power systems?
Yes. The device is fully specified from 3.0V to 27V, with supply current of 2.8–4.8mA across −40°C to +125°C. At 3.3V and 25°C, IDD is 2.8mA typical (page 4), and magnetic thresholds remain valid-enabling use in battery-powered portable appliances with regulated 3.3V rails.
Is AH3716-P-B qualified for automotive applications?
No. While AH3716-P-B meets AEC-Q100 stress test levels for temperature and ESD, Diodes explicitly states in the datasheet (page 1) that automotive qualification (AEC-Q100/101/104/200) and PPAP capability require special part numbers and manufacturing controls-not applicable to standard AH3716-P-B. Automotive designs must use designated AEC-qualified variants.
AH3716-P-B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- -
- Technology:
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- Polarization:
- -
- Sensing Range:
- -
- Test Condition:
- -
- Voltage - Supply:
- -
- Current - Supply (Max):
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- Current - Output (Max):
- -
- Output Type:
- -
- Features:
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- Operating Temperature:
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- Grade:
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- Qualification:
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- Mounting Type:
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- Supplier Device Package:
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AH3716-P-B FAQ
1.How can I place an order for AH3716-P-B through Aetrix?
Please submit a Request for Quotation (RFQ) for AH3716-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 AH3716-P-B reliable?
The price and inventory of AH3716-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 AH3716-P-B is usually 5 days.
3.What payment methods are accepted for AH3716-P-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH3716-P-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH3716-P-B?
AH3716-P-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH3716-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 AH3716-P-B?
For technical support, including AH3716-P-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH3716-P-B requirements.
6.How does Aetrix verify that AH3716-P-B is sourced from the original manufacturer or authorized distributors?
All AH3716-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 AH3716-P-B meets industry standards.
7.What is the process for return or replacement of AH3716-P-B?
All AH3716-P-B units undergo pre-shipment inspection (PSI). If there is an issue with AH3716-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 AH3716-P-B part is unused and in its original packaging.
Return procedure for AH3716-P-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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