My Inquiry
My Account
Diodes Incorporated AH3726Q-SA-7
- Part No.:
- AH3726Q-SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AH3726Q-SA-7.pdf
- Description:
- HALL LATCH SWITCH SSOT23 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:1,415
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AH3726Q-SA-7 from Diodes Incorporated is an AEC-Q100 Grade 0 qualified automotive Hall-effect latch IC designed for high-reliability position sensing in brushless DC motor commutation and angular encoders. It operates from 3.0V to 28V, features bipolar latching (South-on/North-off), delivers BOP = 80–140 G and BRP = –140 to –80 G, and supports –40°C to +150°C ambient operation in SC59 packaging.
For engineers reviewing the AH3726Q-SA-7 datasheet, AH3726Q-SA-7 pinout, AH3726Q-SA-7 application, or AH3726Q-SA-7 equivalent, key selection criteria include magnetic sensitivity range, open-drain output current limit (30–55 mA), chopper-stabilized temperature stability, reverse supply protection (–18 V), and AEC-Q100 qualification for under-hood automotive use.
Technical Context
The AH3726Q-SA-7 implements a chopper-stabilized architecture with dynamic offset cancellation to minimize switch-point drift across temperature and supply voltage. Its internal bandgap regulator provides temperature-compensated biasing for analog circuitry, enabling stable operation over –40°C to +150°C.
It uses a single open-drain output with integrated overcurrent limiting (30–55 mA) and zener clamping (28 V), while built-in reverse-blocking diode and ESD protection (8 kV HBM / 1 kV CDM) ensure robustness in noisy automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3.0 V to 28 V - supports direct battery connection in 12 V/24 V automotive systems without external regulation |
| Operating Temperature | –40°C to +150°C - qualified for engine compartment and transmission-mounted applications |
| BOP / BRP | 80–140 G / –140 to –80 G - high-sensitivity bipolar latch optimized for precise angular position detection |
| Output Type | Open-drain - enables flexible pull-up configuration and wired-OR interfacing with microcontrollers or logic |
| Output Current Limit | 30–55 mA - protects against short-circuit faults while driving typical 1–10 kΩ pull-up loads |
| Startup Time | 10 µs typical - ensures rapid system readiness after power-on, critical for real-time RPM measurement |
| Chopping Frequency | 500 kHz - suppresses low-frequency noise and offsets, improving signal integrity in EMI-heavy environments |
Pinout & Package
Package: SC59 - surface-mount, 3-pin, industry-standard footprint compatible with automated assembly and high-temperature reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VDD | Power supply input with reverse-blocking diode and zener clamp (–18 V / 28 V) for fault tolerance |
| 2 | GND | Ground reference for internal regulation and output switching; shared return path for all circuit blocks |
| 3 | OUTPUT | Open-drain output with overcurrent limit and zener clamp; sinks up to 55 mA when latched on by South pole |
Key Features
| Feature | Design Value |
|---|---|
| Bipolar Latch Logic | South pole activates output (low), North pole releases it - enables contactless direction-agnostic rotation sensing |
| Chopper Stabilization | 500 kHz modulation eliminates thermal drift and stress-induced offset, maintaining ±5 G consistency over temperature |
| Magnetic Hysteresis | 160–280 G - prevents chatter near threshold and ensures clean state transitions in vibrating mechanical systems |
| AEC-Q100 Grade 0 | Qualified to +150°C junction temperature with PPAP support - meets OEM requirements for safety-critical drivetrain sensors |
| ESD & Transient Protection | 8 kV HBM / 1 kV CDM; –18 V reverse supply rating - survives jump-starts, load-dump transients, and assembly ESD events |
Applications
| Brushless DC Motor Commutation | RPM Measurement in Automotive Cooling Fans |
|---|---|
Use Scenario: Detect rotor magnet polarity to sequence stator phase energization in electric power steering motors. IC Role / Device Role / Timing Role: Hall latch providing synchronized edge-triggered signals to MCU-based motor controller for precise 120° commutation timing. Use Value: Enables high-efficiency, low-noise BLDC operation with <1 µs propagation delay stability across –40°C to +150°C. |
Use Scenario: Monitor fan blade passage via embedded magnet to calculate real-time airflow speed in HVAC systems. IC Role / Device Role / Timing Role: Magnetic zero-crossing detector feeding pulse train to vehicle body control module for closed-loop fan speed regulation. Use Value: Delivers repeatable 10 µs startup response and <0.5% BOP drift over life, ensuring accurate duty-cycle-based RPM feedback. |
| Transmission Gear Position Sensing | Steering Angle Indexing |
Use Scenario: Sense gear selector lever position using multi-pole ring magnet mounted on shift linkage shaft. IC Role / Device Role / Timing Role: Bipolar latch capturing discrete angular states (P/R/N/D) with hysteresis to reject mechanical vibration noise. Use Value: 220 G typical hysteresis prevents false triggering during gear engagement shock, supporting ASIL-B functional safety decomposition. |
Use Scenario: Detect absolute steering wheel angle via dual-magnet arrangement on column shaft for EPS assist calibration. IC Role / Device Role / Timing Role: High-sensitivity latch (110 G typ BOP) resolving fine angular increments in compact space-constrained packaging. Use Value: Stable 80–140 G operate window enables reliable detection at low field strengths, reducing magnet size and cost. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Hall-effect latch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AL3726Q-SR-7 | Same die, SC59 package, but with tape-and-reel (SR) vs. cut-tape (SA) packaging; identical electrical specs | No functional difference - only logistics variation for SMT line feed compatibility | Select SA-7 for prototyping or low-volume builds requiring manual handling; SR-7 for high-speed pick-and-place production |
| TLE4961-2M | Higher BOP/BRP (±150 G), integrated diagnostics, but requires 4.5–28 V supply and lacks reverse-voltage protection | Targeted at ASIL-B systems needing fault reporting; not drop-in due to different pinout and diagnostic overhead | Choose TLE4961-2M only when diagnostic coverage is mandated; AH3726Q-SA-7 offers simpler integration and broader supply tolerance |
Compared with AL3726Q-SR-7, AH3726Q-SA-7 differs only in packaging format-not performance-while versus TLE4961-2M, it trades diagnostic capability for wider supply range, reverse-protection, and lower system-level design complexity.
Availability
AH3726Q-SA-7 is available at Aetrix Electronics and suitable for automotive BLDC motor control, transmission position sensing, cooling fan RPM monitoring, and steering angle indexing requiring stable component supply across extended temperature and voltage ranges.
Supply support for AH3726Q-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 consumer markets.
The AH372XQ series belongs to Diodes' AEC-Q100-qualified Hall-effect sensor product line, engineered specifically for high-temperature, high-reliability position and speed sensing in automotive powertrain and chassis systems.
FAQ
What is the magnetic polarity orientation requirement for AH3726Q-SA-7 in SC59 package?
For SC59 packaging, the South pole must be applied to the non-part-marking side of the device to activate the output. This is opposite to SOT23 (Type S) and SIP-3 variants, where the South pole targets the part-marking side. The datasheet specifies this polarity reversal explicitly in the magnetic characteristics table and pin diagrams.
Does AH3726Q-SA-7 require an external capacitor on VDD?
Yes - a 10 nF to 100 nF ceramic decoupling capacitor (CIN) is required between VDD and GND to stabilize the internal regulator and enhance RF noise immunity. The datasheet specifies this in the Typical Applications Circuit and notes that omission degrades startup reliability and EMI rejection.
Can AH3726Q-SA-7 operate reliably at 28 V continuous supply?
No - 28 V is the maximum recommended operating voltage, not an absolute rating. The absolute maximum VDD is 32 V (transient only). Continuous operation at 28 V is supported per Recommended Operating Conditions, but thermal derating applies above 150°C junction temperature, and long-term reliability testing was conducted at ≤28 V.
Is AH3726Q-SA-7 pin-compatible with other AH372XQ variants?
Yes - all AH372XQ variants (AH3722Q through AH3729Q) share identical SC59, SOT23 (Type S), and SIP-3 pinouts and footprints. Only magnetic thresholds differ; electrical interface, timing, protection features, and package dimensions are fully interchangeable.
AH3726Q-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, Bipolar Switch
- Technology:
- Hall Effect
- Polarization:
- North Pole, South Pole
- Sensing Range:
- ±6mT Trip, ±0.5mT Release
- Test Condition:
- 25°C
- Voltage - Supply:
- 2.2V ~ 20V
- Current - Supply (Max):
- 4mA
- Current - Output (Max):
- 25mA
- Output Type:
- Digital
- Features:
- Temperature Compensated
- Operating Temperature:
- -40°C ~ 150°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
AH3726Q-SA-7 FAQ
1.How can I place an order for AH3726Q-SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AH3726Q-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 AH3726Q-SA-7 reliable?
The price and inventory of AH3726Q-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 AH3726Q-SA-7 is usually 5 days.
3.What payment methods are accepted for AH3726Q-SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH3726Q-SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH3726Q-SA-7?
AH3726Q-SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH3726Q-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 AH3726Q-SA-7?
For technical support, including AH3726Q-SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH3726Q-SA-7 requirements.
6.How does Aetrix verify that AH3726Q-SA-7 is sourced from the original manufacturer or authorized distributors?
All AH3726Q-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 AH3726Q-SA-7 meets industry standards.
7.What is the process for return or replacement of AH3726Q-SA-7?
All AH3726Q-SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with AH3726Q-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 AH3726Q-SA-7 part is unused and in its original packaging.
Return procedure for AH3726Q-SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AH3726Q-SA-7 Tags
-
TCS40DLR,LF
Toshiba Semiconductor and Storage
-
DRV5032FBDBZR
Texas Instruments
-
DRV5032FADBZR
Texas Instruments
-
AH1912-FA-7
Diodes Incorporated
-
AH1913-W-7
Diodes Incorporated
-
AH1911-W-7
Diodes Incorporated
-
TLI49631MXTSA1
Infineon Technologies
-
SM453R
Honeywell Sensing and Productivity Solutions
-
MLX90248ESE-EBA-000-RE
Melexis Technologies NV
-
MLX92213ELD-AAA-000-RE
Melexis Technologies NV
-
TLE4913HTSA1
Infineon Technologies
-
US5781ESE-AAA-000-RE
Melexis Technologies NV
Tech Hub
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
Engineering guide to Raspberry Pi alternatives, covering chip-level differences, Orange Pi, ROCK, Jetson, Banana Pi, NanoPi, Compute Module, Pico, GPIO, camera, HAT compatibility, and replacement risks…
