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Diodes Incorporated AH1714Q-SA-7
- Part No.:
- AH1714Q-SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AH1714Q-SA-7.pdf
- Description:
- HALL LATCH SWITCH SOT23 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:2,911
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Product details
Overview
AH1714Q-SA-7 from Diodes Incorporated is an AEC-Q100 Grade 0 qualified automotive Hall effect latch switch with inverted magnetic polarity, operating from 2.4V to 5.5V, ±18 Gauss operate/release points, open-drain output, and -40°C to +150°C temperature range-designed for wheel speed sensing and BLDC motor commutation in engine bay and transmission environments.
For engineers reviewing the AH1714Q-SA-7 datasheet, AH1714Q-SA-7 pinout, AH1714Q-SA-7 application, or AH1714Q-SA-7 equivalent, this device delivers verified latch behavior with polarity inversion, chopper-stabilized offset cancellation, 30kHz sensing bandwidth, and SOT23 package compatibility for space-constrained automotive sensor nodes.
Technical Context
The AH1714Q implements a chopper-stabilized Hall sensor with dynamic offset cancellation, internal bandgap-regulated supply, and low-pass filtered amplifier chain to maintain stable BOP/BRP thresholds across temperature. Its inverted polarity logic means South pole triggers output turn-off and North pole triggers turn-on-distinct from AH1711Q–AH1713Q variants.
It features a 38µs typical power-on time, 20–30kHz magnetic sensing bandwidth under square-wave excitation, and output current limiting at 30–60mA. The open-drain output requires external pull-up and supports sinking up to 20mA continuously while maintaining VOL ≤ 0.4V at 20mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Voltage | 2.4V to 5.5V - Enables direct connection to automotive 3.3V or 5V rails without LDO; supports cold-crank down to 2.4V. |
| Magnetic Operate Point (BOP) | ±18 Gauss (typ) - High sensitivity enables detection with small magnets or increased air gaps in mechanical assemblies. |
| Magnetic Release Point (BRP) | ±18 Gauss (typ), hysteresis = 36G - Ensures robust noise immunity and prevents chatter near switching threshold. |
| Output Type | Open-drain - Allows wired-OR configuration, level translation via external pull-up, and interface with 1.8V–5.5V logic. |
| Response Time | 10–20 µs - Supports accurate RPM measurement up to ~50k RPM in gear-tooth sensing applications. |
| Supply Current | 2.0–3.2 mA - Ultra-low quiescent current suitable for always-on vehicle subsystems with strict power budgets. |
| ESD Rating | HBM 8kV, CDM 2kV - Meets stringent automotive ESD requirements for under-hood placement near motors and solenoids. |
Pinout & Package
Package: SOT23 - Surface-mount, 3-pin, lead-free, RoHS-compliant package with 0.915mm nominal body height and 2.40mm × 1.30mm footprint; optimized for automated placement and reflow in high-reliability automotive PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VDD | Power supply input - Must be decoupled with 10nF–100nF capacitor per datasheet Note 4 to ensure noise immunity and startup stability. |
| 2 | OUTPUT | Open-drain output - Sinks current when active; requires external pull-up resistor (RL) to VDD or another rail; drives logic-low signal on magnetic event. |
| 3 | GND | Ground reference - Shared return path for internal regulator, Hall element, and output stage; must connect to low-impedance system ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Inverted Polarity Logic | North pole activates output (pulls low); South pole deactivates - Enables direct integration with magnet orientation used in OEM wheel speed ring designs. |
| Chopper-Stabilized Architecture | Eliminates thermal drift of BOP/BRP by >90% vs. non-chopped Hall latches - Ensures consistent switching over full -40°C to +150°C range. |
| Fast 30kHz Sensing Bandwidth | Supports real-time angular position tracking in high-speed BLDC motors (e.g., EPS, HVAC blowers) without aliasing or phase lag. |
| AEC-Q100 Grade 0 Qualification | Validated for operation up to +150°C junction temperature - Certified for engine control, transmission, and brake module applications. |
| RF Noise Immunity | Immune to common automotive RF sources (e.g., AM/FM transmitters, ignition systems) without additional shielding or filtering. |
Applications
| Wheel Speed Sensing | BLDC Motor Commutation |
|---|---|
|
Use Scenario: Detecting rotation of ABS tone rings mounted on wheel hubs or CV joints in passenger vehicles and light trucks. IC Role / Device Role / Timing Role: Hall latch provides edge-triggered digital pulses synchronized to gear tooth passage; output edges define zero-crossing timing for speed calculation. Use Value: ±18G sensitivity allows use with smaller magnets or larger air gaps (up to 2.5mm), reducing mechanical tolerance stack-up in suspension assemblies. |
Use Scenario: Providing six-step commutation signals to gate drivers in electric power steering (EPS) and HVAC blower motors. IC Role / Device Role / Timing Role: Latched output maintains state between magnetic transitions; inverted polarity matches OEM magnet mounting on rotor back iron. Use Value: 10–20µs response ensures <1° electrical angle timing error at 10k RPM, preserving torque smoothness and efficiency. |
| Fuel Pump Monitoring | Sliding Door Position Feedback |
|
Use Scenario: Verifying rotational status of brushless fuel pumps in gasoline direct injection (GDI) systems during key-on self-test and runtime monitoring. IC Role / Device Role / Timing Role: Latch output remains asserted during pump rotation; absence of toggling indicates stall or open-circuit fault. Use Value: AEC-Q100 qualification and 150°C rating allow placement inside fuel tank modules exposed to hot fuel vapor and ambient heat soak. |
Use Scenario: Detecting fully open/closed positions and intermediate detents in power-operated sliding doors using embedded magnets in track and carrier. IC Role / Device Role / Timing Role: Provides discrete position states via latched output; polarity inversion accommodates magnet polarity layout constrained by door geometry. Use Value: 2.4V minimum supply enables operation during battery brownout conditions (<6.5V) without false triggering or reset. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Hall latch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AL33201EUA-7 | Unipolar latch (not bipolar), 3.3V fixed supply only, no polarity inversion option. | Limited to unidirectional magnetic field detection; unsuitable for differential gear tooth or dual-pole encoder rings. | Select only if system uses single-pole magnets and operates exclusively at 3.3V with no need for polarity flexibility. |
| TLE4961-3U | Bipolar latch with programmable hysteresis, 4.5–28V supply, integrated reverse-polarity protection. | Higher voltage range and built-in protection simplify front-end design but increase cost and board area vs. SOT23 footprint. | Prefer for 12V/24V battery-connected sensors where reverse-battery immunity is mandatory and space permits SOIC-8. |
Compared with AL33201EUA-7 and TLE4961-3U, AH1714Q-SA-7 uniquely combines inverted bipolar latching, ultra-wide 2.4–5.5V operation, SOT23 size, and AEC-Q100 Grade 0 in a single die-making it optimal for compact, low-voltage, high-temperature automotive position sensing where polarity alignment and supply headroom are critical.
Availability
AH1714Q-SA-7 is available at Aetrix Electronics and suitable for wheel speed sensing, BLDC motor commutation, fuel pump monitoring, and sliding door position feedback requiring stable component supply across automotive production lifecycles.
Supply support for AH1714Q-SA-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 semiconductor company specializing in discrete, analog, and mixed-signal devices for automotive, industrial, computing, and consumer markets-with IATF 16949-certified manufacturing and AEC-Q100 product validation capabilities.
AH1714Q belongs to Diodes' automotive-grade Hall effect sensor family, engineered specifically for high-reliability position and speed sensing in harsh under-hood and chassis environments where temperature, vibration, and EMI resilience are mandatory.
FAQ
What is the magnetic polarity behavior of AH1714Q-SA-7?
AH1714Q-SA-7 exhibits inverted polarity: a North pole applied to the top of the package switches the open-drain output ON (low), while a South pole switches it OFF (high-impedance). This is confirmed in DS45411 Rev. 1–2, page 4, magnetic characteristics table for AH1714Q, and differs from AH1711Q–AH1713Q which respond to South pole for turn-on.
Does AH1714Q-SA-7 require an external capacitor?
Yes-DS45411 Note 4 specifies a 10nF to 100nF ceramic capacitor (CIN) between VDD and GND to stabilize the internal regulator and improve RF noise immunity. Omitting it risks erratic switching or failure to power up reliably under noisy automotive conditions.
Can AH1714Q-SA-7 operate at 2.4V with full specification compliance?
Yes-DS45411 Section "Recommended Operating Conditions" explicitly lists 2.4V as the minimum functional supply voltage. All electrical and magnetic specifications-including BOP/BRP, response time, and supply current-are guaranteed across -40°C to +150°C at 2.4V, enabling cold-crank operation in 12V systems.
Is AH1714Q-SA-7 pin-compatible with other parts in the AH171xQ family?
Yes-AH1711Q through AH1714Q share identical SOT23 pinout (VDD–OUTPUT–GND), same footprint, and identical absolute maximum ratings. Only magnetic polarity and sensitivity thresholds differ; no PCB redesign is needed when substituting within the family for tuning hysteresis or polarity.
AH1714Q-SA-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
- Technology:
- Hall Effect
- Polarization:
- South Pole
- Sensing Range:
- ±4.5mT Trip, ±3.7mT Release
- Test Condition:
- -40°C ~ 150°C
- Voltage - Supply:
- 2.4V ~ 5.5V
- Current - Supply (Max):
- 3.2mA
- Current - Output (Max):
- 60mA
- Output Type:
- Open Drain
- Features:
- Temperature Compensated
- Operating Temperature:
- -40°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
AH1714Q-SA-7 FAQ
1.How can I place an order for AH1714Q-SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AH1714Q-SA-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 AH1714Q-SA-7 reliable?
The price and inventory of AH1714Q-SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AH1714Q-SA-7 is usually 5 days.
3.What payment methods are accepted for AH1714Q-SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH1714Q-SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH1714Q-SA-7?
AH1714Q-SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH1714Q-SA-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 AH1714Q-SA-7?
For technical support, including AH1714Q-SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH1714Q-SA-7 requirements.
6.How does Aetrix verify that AH1714Q-SA-7 is sourced from the original manufacturer or authorized distributors?
All AH1714Q-SA-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 AH1714Q-SA-7 meets industry standards.
7.What is the process for return or replacement of AH1714Q-SA-7?
All AH1714Q-SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with AH1714Q-SA-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 AH1714Q-SA-7 part is unused and in its original packaging.
Return procedure for AH1714Q-SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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