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Diodes Incorporated AH3717Q-SA-7
- Part No.:
- AH3717Q-SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- -
- Datasheet:
-
AH3717Q-SA-7.pdf
- Description:
- HALL LATCH SWITCH SSOT23 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:2,999
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Product details
Overview
AH3717Q-SA-7 from Diodes Incorporated is an AEC-Q100 Grade 0 qualified automotive Hall-effect bipolar latch IC in SOT23 (Type S) package, designed for brushless DC motor commutation and angular position sensing. It operates from 3.0V to 27V, features ±140G 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 AH3717Q-SA-7 datasheet, AH3717Q-SA-7 pinout, AH3717Q-SA-7 application, or AH3717Q-SA-7 equivalent, key selection criteria include magnetic sensitivity (BOP = 110–170G), load-dump tolerance (40V), reverse-battery protection (−18V), and compatibility with high-temperature automotive environments requiring robust position feedback.
Technical Context
The AH3717Q employs chopper-stabilized amplification and dynamic offset cancellation to achieve minimal switch-point drift (<±0.5G/°C typical) and superior temperature stability over −40°C to +150°C. Its internal bandgap regulator supplies temperature-compensated bias to all subcircuits, enabling consistent operation across full automotive voltage (3.0–27V) and thermal ranges.
It implements a bipolar latching function: South pole applied to the part-marking side switches output low (ON); North pole releases it (OFF). The 280G typical hysteresis (BHY) ensures noise-immune state retention, while the open-drain output supports external pull-up configurations up to 27V with Zener clamping and overcurrent limiting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3.0V to 27V - Supports direct connection to automotive battery rail including cold-crank (≥3V) and load-dump transients (clamped at 40V). |
| BOP / BRP (Typical) | ±140G - High-sensitivity latching threshold enables reliable detection with small magnets or large air gaps in motor rotor position sensing. |
| Hysteresis (BHY) | 280G typical - Prevents chatter in noisy magnetic fields; critical for stable RPM measurement in BLDC applications. |
| Output Type | Open-drain, 60mA sink - Allows flexible pull-up to any voltage ≤27V; integrated current limit protects against short-circuit faults. |
| Startup Time | 13µs typical - Ensures rapid system readiness after power-on; output valid within microseconds of VDD reaching 3V. |
| Operating Temperature | −40°C to +150°C - Qualified for under-hood automotive locations including engine control modules and transmission sensors. |
| ESD Rating | HBM: 8kV, CDM: 1kV - Meets stringent automotive ESD immunity requirements without external protection components. |
Pinout & Package
SOT23 (Type S) package: 3-pin surface-mount, lead-free, RoHS-compliant, footprint compatible with JEDEC TO-236AB. Thermal resistance θJA = 270°C/W (PCB mounted, 1-in² copper pad).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VDD | Power supply input with reverse-blocking diode and 36V Zener clamp; accepts 3.0–27V nominal, withstands −18V reverse and 40V transients. |
| 2 | GND | Ground reference for internal regulator and output stage; must be low-impedance path to minimize noise coupling into chopper circuitry. |
| 3 | OUTPUT | Open-drain NMOS output with 30–60mA current limit; requires external pull-up; sinks to ≤0.42V @ 20mA for clean logic-level interfacing. |
Key Features
| Feature | Design Value |
|---|---|
| Chopper-stabilized architecture | Reduces offset drift to <±0.5G/°C and eliminates mechanical stress-induced errors-enables stable commutation timing across thermal cycling. |
| 40V load-dump protection | Withstands ISO 7637-2 Pulse 5a transients without external TVS; internal Zener clamp activates above 36V on VDD pin. |
| Reverse-battery protection | Integrated blocking diode limits reverse current to ≤2.3mA at −18V, eliminating need for external series diode in battery-connected systems. |
| High magnetic sensitivity | BOP = 110–170G (typ. 140G) allows use with low-strength ferrite magnets or extended sensing distances in compact encoders. |
| AEC-Q100 Grade 0 qualification | Validated for 150°C ambient operation and PPAP-ready; manufactured in IATF 16949-certified facilities with full traceability. |
Applications
| Brushless DC Motor Commutation | RPM Measurement |
|---|---|
|
Use Scenario: Detecting rotor magnet polarity to sequence stator coil energization in electric power steering (EPS) motors. IC Role / Device Role / Timing Role: Bipolar latch provides edge-triggered, hysteresis-filtered commutation signals synchronized to rotor position. Use Value: 13µs startup time and 280G hysteresis ensure jitter-free timing even during rapid acceleration/deceleration. |
Use Scenario: Monitoring gear tooth passage in transmission speed sensors for vehicle speed calculation. IC Role / Device Role / Timing Role: Latched output delivers clean, debounced pulse train directly proportional to rotational speed. Use Value: Open-drain output interfaces natively with 5V or 12V microcontroller inputs; 60mA sink handles heavy capacitive loads. |
| Angular Position Sensing | Flow Meter Detection |
|
Use Scenario: Measuring throttle valve angle via magnet rotation on potentiometer shaft in gasoline engine management. IC Role / Device Role / Timing Role: Provides digital on/off indication at precise angular thresholds (e.g., idle vs. wide-open throttle). Use Value: ±140G sensitivity enables accurate detection with small surface-mount magnets; −40°C to +150°C range covers full engine operating envelope. |
Use Scenario: Counting turbine rotations in fuel or coolant flow meters using embedded permanent magnets. IC Role / Device Role / Timing Role: Converts mechanical rotation into discrete pulses for microcontroller-based flow rate computation. Use Value: 40V transient tolerance and reverse-battery protection eliminate need for external protection in 12V/24V vehicle power domains. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Hall-effect latch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AL3717QSA-7 | Same pinout and sensitivity (BOP/BRP ≈ ±140G), but uses different chopper architecture; slightly higher IDD (3.2mA typ. vs. 2.8mA). | Identical functional behavior in BLDC commutation; lower quiescent current makes AH3717Q-SA-7 preferable for battery-sensitive modules. | Select AH3717Q-SA-7 for lowest power consumption in always-on automotive nodes. |
| TLE4961-2M | Higher BOP (±200G), wider VDD range (2.7–24V), but no reverse-battery protection and only AEC-Q100 Grade 1 (−40°C to +125°C). | Not suitable for under-hood locations >125°C or systems exposed to reverse-battery faults; lacks integrated Zener clamp. | Choose AH3717Q-SA-7 when Grade 0 qualification, reverse-battery immunity, or 150°C operation is mandatory. |
Compared with AL3717QSA-7 and TLE4961-2M, AH3717Q-SA-7 uniquely combines Grade 0 qualification, reverse-battery protection, and lowest quiescent current-making it optimal for high-reliability, thermally demanding automotive position sensing where power budget and fault resilience are critical.
Availability
AH3717Q-SA-7 is available at Aetrix Electronics and suitable for brushless DC motor commutation, RPM measurement, and angular position sensing requiring stable component supply in automotive production programs.
Supply support for AH3717Q-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 manufacturer specializing in discrete, analog, and mixed-signal solutions for automotive, industrial, and computing markets.
AH3717Q belongs to the AH37xxQ automotive Hall-effect latch family, engineered specifically for high-voltage, high-temperature position feedback in safety-critical vehicle subsystems like EPS, transmission, and engine control.
FAQ
What is the magnetic polarity orientation required for AH3717Q-SA-7 operation?
For the SOT23 (Type S) package (AH3717Q-SA-7), the South pole must be applied to the part-marking side to turn the output ON; North pole on the same side turns it OFF. This is confirmed in the datasheet's Pin Assignments section and Magnetic Characteristics table for SA-packaged variants.
Does AH3717Q-SA-7 require an external bypass capacitor?
Yes - a 10nF to 100nF ceramic capacitor (CIN) between VDD and GND is recommended per the Typical Applications Circuit. It stabilizes the internal regulator and enhances RF noise immunity, especially in electrically noisy automotive environments.
Can AH3717Q-SA-7 drive an LED directly?
No - the open-drain output is rated for 60mA sink current but lacks internal current regulation. Driving an LED requires an external current-limiting resistor; typical configuration uses a pull-up to VDD (e.g., 12V) and series resistor sized for desired LED current (e.g., 10mA with 1.2kΩ).
Is AH3717Q-SA-7 pin-compatible with earlier AH37xxQ variants?
Yes - all AH37xxQ devices (AH3713Q through AH3717Q) share identical SOT23 (Type S), SC59, and SIP-3 packages and pinouts. Only magnetic sensitivity (BOP/BRP) differs; electrical interface, timing, and protection features are fully compatible.
AH3717Q-SA-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- 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:
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AH3717Q-SA-7 FAQ
1.How can I place an order for AH3717Q-SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AH3717Q-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 AH3717Q-SA-7 reliable?
The price and inventory of AH3717Q-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 AH3717Q-SA-7 is usually 5 days.
3.What payment methods are accepted for AH3717Q-SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH3717Q-SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH3717Q-SA-7?
AH3717Q-SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH3717Q-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 AH3717Q-SA-7?
For technical support, including AH3717Q-SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH3717Q-SA-7 requirements.
6.How does Aetrix verify that AH3717Q-SA-7 is sourced from the original manufacturer or authorized distributors?
All AH3717Q-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 AH3717Q-SA-7 meets industry standards.
7.What is the process for return or replacement of AH3717Q-SA-7?
All AH3717Q-SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with AH3717Q-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 AH3717Q-SA-7 part is unused and in its original packaging.
Return procedure for AH3717Q-SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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