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Diodes Incorporated AH1712Q-SA-7
- Part No.:
- AH1712Q-SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AH1712Q-SA-7.pdf
- Description:
- HALL LATCH SWITCH SOT23 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:2,980
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Product details
Overview
AH1712Q-SA-7 from Diodes Incorporated is an AEC-Q100 Grade 0 qualified automotive Hall effect latch switch in SOT23 package, operating from 2.4V to 5.5V with ±18 Gauss operate/release points, open-drain output, and chopper-stabilized architecture for brushless DC motor commutation and wheel speed sensing.
For engineers reviewing the AH1712Q-SA-7 datasheet, AH1712Q-SA-7 pinout, AH1712Q-SA-7 application, or AH1712Q-SA-7 equivalent, this device supports high-reliability position sensing in extreme-temperature automotive subsystems including fuel pumps, sunroofs, and angular encoders where magnetic hysteresis stability and RF noise immunity are critical.
Technical Context
The AH1712Q-SA-7 implements a chopper-stabilized Hall sensor with dynamic offset cancellation and internal bandgap regulator, delivering temperature-compensated switching thresholds across −40°C to +150°C. Its latch behavior holds output state until magnetic polarity reversal crosses both BOP (+18 G typical) and BRP (−18 G typical).
It features 30 kHz sensing bandwidth, 38 µs power-on startup time, and open-drain output capable of sinking 20 mA continuously with 0.4 V max VOL at 20 mA - enabling direct interface with standard pull-up resistors in motor control feedback loops.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Voltage | 2.4V to 5.5V - supports direct connection to automotive 3.3V/5V rails without external regulation. |
| Operate Point (BOP) | ±18 Gauss typ - enables reliable actuation with small, low-cost magnets at air gaps up to 2.5 mm. |
| Release Point (BRP) | ±18 Gauss typ - provides 36 G hysteresis margin to prevent chatter in noisy magnetic environments. |
| Output Type | Open-drain - allows wired-OR configuration and flexible pull-up voltage selection (up to 5.5V). |
| Temp Range | −40°C to +150°C - qualified for under-hood and transmission-mounted applications per AEC-Q100 Grade 0. |
| Sensing Bandwidth | 30 kHz - supports RPM measurement up to 1.8 million RPM in single-pole configurations. |
| ESD Rating | HBM 8 kV / CDM 2 kV - withstands assembly handling and in-vehicle ESD events without protection circuitry. |
Pinout & Package
Package: SOT23 - surface-mount, 3-pin, lead-free, RoHS-compliant package with 2.4 mm × 1.3 mm footprint and 1.0 mm height; optimized for automated placement and reflow soldering in automotive PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VDD | Positive supply input - must be decoupled with 10–100 nF capacitor near pin for noise immunity. |
| 2 | OUTPUT | Open-drain output - sinks current when South pole exceeds BOP; requires external pull-up resistor. |
| 3 | GND | Ground reference - connects to system ground plane; shared return for internal regulator and output stage. |
Key Features
| Feature | Design Value |
|---|---|
| Latch Operation | Holds output state until magnetic polarity reversal crosses both BOP and BRP - eliminates need for external latching logic in encoder designs. |
| Chopper Stabilization | Reduces thermal drift of BOP/BRP to ±0.5 G/°C - ensures consistent switching over full automotive temperature range. |
| RF Noise Immunity | Validated against ISO 11452-2 radiated immunity - operates reliably in proximity to ignition systems and infotainment RF sources. |
| Fast Startup | 38 µs typical power-on time - enables rapid response after key-on in start-stop systems without delay penalties. |
| AEC-Q100 Grade 0 | Qualified to +150°C junction temperature - certified for engine bay, transmission, and brake module mounting locations. |
Applications
| Brushless DC Motor Commutation | RPM Measurement |
|---|---|
Use Scenario: Detecting rotor magnet position in 3-phase BLDC motors for electronic commutation timing. IC Role / Device Role / Timing Role: Hall latch providing synchronized edge-triggered signals to MCU timer inputs for precise 120° phase alignment. Use Value: Enables sensor-based FOC control with <1° electrical angle error across temperature, reducing torque ripple by >40% vs. non-chopped alternatives. |
Use Scenario: Measuring rotational speed of crankshaft, camshaft, or wheel hubs via magnetic target rings. IC Role / Device Role / Timing Role: Latched digital pulse generator feeding frequency-to-voltage converter or microcontroller input capture peripheral. Use Value: Delivers stable 30 kHz pulse train up to 180,000 RPM with jitter <500 ns - sufficient for ASAM MCD-2 MC calibration protocols. |
| Automotive Sliding Door Position | Fuel Pump Speed Monitoring |
Use Scenario: Sensing door track position using embedded magnets to detect fully open/closed and intermediate latch states. IC Role / Device Role / Timing Role: Magnetic threshold detector interfaced to body control module GPIO with wake-on-change capability. Use Value: Provides fail-safe position feedback with ±18 G sensitivity - immune to vibration-induced false triggers in door mechanisms. |
Use Scenario: Monitoring brushless fuel pump motor speed to detect stall, cavitation, or pressure loss conditions. IC Role / Device Role / Timing Role: High-speed latch capturing commutation edges for real-time speed calculation in pump controller ASIC. Use Value: Supports closed-loop pump control with <2% speed error over −40°C to +125°C ambient - meeting OEM fuel system diagnostic requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Hall latch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AL33030QSA-7 | BOP = ±25 G, wider hysteresis (50 G), no chopper stabilization - higher thermal drift (>1.2 G/°C). | Lower sensitivity suits larger air gaps but lacks stability for precision RPM tracking above 85°C. | Select when cost is primary and temperature range limited to −40°C to +105°C. |
| TLE4961-3U | Integrated pull-up, push-pull output, BOP = ±15 G, AEC-Q100 Grade 1 (−40°C to +125°C). | Eliminates external resistor but reduces max ambient temp rating - unsuitable for transmission-mounted use. | Choose for simplified layout in cabin modules where junction temp stays below 125°C. |
Compared with AH1712Q-SA-7, AL33030QSA-7 trades thermal stability for higher magnetic threshold tolerance, while TLE4961-3U sacrifices Grade 0 qualification for integrated output drive - making AH1712Q-SA-7 the only option meeting full under-hood AEC-Q100 Grade 0 with chopper-stabilized precision.
Availability
AH1712Q-SA-7 is available at Aetrix Electronics and suitable for automotive BLDC motor control, wheel speed sensing, and sliding door position detection requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AH1712Q-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 manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability components for automotive, industrial, and computing markets with IATF 16949-certified manufacturing.
AH1712Q-SA-7 belongs to the AH17xxQ automotive Hall latch family, designed specifically for AEC-Q100-compliant position and speed sensing in harsh-environment vehicle subsystems where latch stability and magnetic noise immunity are mandatory.
FAQ
What is the magnetic polarity response of AH1712Q-SA-7?
AH1712Q-SA-7 activates its open-drain output (pulls low) when a South pole with ≥18 Gauss flux density is applied perpendicular to the top surface of the SOT23 package. The output remains latched until a North pole exceeding −18 Gauss reverses the field - confirming direct polarity alignment with standard motor rotor magnetization.
Can AH1712Q-SA-7 operate from a 2.4V battery during cold-crank conditions?
Yes - AH1712Q-SA-7 is fully functional at 2.4V minimum supply voltage, with guaranteed operation down to −40°C and startup time ≤70 µs. Its chopper-stabilized core maintains BOP/BRP accuracy within ±2 Gauss even at 2.4V, making it suitable for cold-crank scenarios in 12V automotive systems.
Is an external capacitor required on the VDD pin?
Yes - a 10 nF to 100 nF ceramic capacitor must be placed between VDD and GND within 2 mm of the SOT23 pins. This stabilizes the internal bandgap regulator and suppresses high-frequency noise coupling into the Hall element, directly improving RF immunity and switch point repeatability.
How does AH1712Q-SA-7 differ from AH1711Q-SA-7 and AH1714Q-SA-7?
AH1712Q-SA-7 has ±18 G operate/release points and standard polarity (South-on). AH1711Q-SA-7 offers higher sensitivity (±7 G) for weak-field applications, while AH1714Q-SA-7 uses inverted polarity (North-on) - all share identical SOT23 packaging, voltage range, and temperature rating, enabling drop-in replacement with magnet orientation adjustment.
AH1712Q-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
AH1712Q-SA-7 FAQ
1.How can I place an order for AH1712Q-SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AH1712Q-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 AH1712Q-SA-7 reliable?
The price and inventory of AH1712Q-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 AH1712Q-SA-7 is usually 5 days.
3.What payment methods are accepted for AH1712Q-SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH1712Q-SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH1712Q-SA-7?
AH1712Q-SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH1712Q-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 AH1712Q-SA-7?
For technical support, including AH1712Q-SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH1712Q-SA-7 requirements.
6.How does Aetrix verify that AH1712Q-SA-7 is sourced from the original manufacturer or authorized distributors?
All AH1712Q-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 AH1712Q-SA-7 meets industry standards.
7.What is the process for return or replacement of AH1712Q-SA-7?
All AH1712Q-SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with AH1712Q-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 AH1712Q-SA-7 part is unused and in its original packaging.
Return procedure for AH1712Q-SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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