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Diodes Incorporated AH3723Q-W-7
- Part No.:
- AH3723Q-W-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AH3723Q-W-7.pdf
- Description:
- HALL LATCH SWITCH SC59 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:4,057
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Product details
Overview
AH3723Q-W-7 from Diodes Incorporated is an AEC-Q100 Grade 0 qualified automotive Hall-effect bipolar latch IC for brushless DC motor commutation and angular position sensing. It operates from 3.0V to 28V, features ±30G typical operate/release points (BOP/BRP), 60 mA output current limit, and -40°C to +150°C operation-deployed in engine camshaft/crankshaft position detection and EPS motor control.
For engineers reviewing the AH3723Q-W-7 datasheet, AH3723Q-W-7 pinout, AH3723Q-W-7 application, or AH3723Q-W-7 equivalent, key selection criteria include magnetic sensitivity tolerance across temperature, open-drain output drive capability under 28V supply, latch polarity alignment with package marking side, and AEC-Q100 Grade 0 qualification for under-hood deployment.
Technical Context
The AH3723Q-W-7 uses chopper-stabilized architecture with dynamic offset cancellation to maintain stable BOP/BRP thresholds across -40°C to +150°C. Its internal bandgap regulator supplies temperature-compensated bias to analog circuitry, minimizing switch-point drift.
It integrates reverse-blocking diode and zener clamp on VDD, plus output overcurrent limit and zener clamp. The single open-drain output switches low when South pole flux exceeds +30G (typ) and latches until North pole flux drops below -30G (typ), with polarity dependent on package orientation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3.0V to 28V - supports direct connection to automotive battery rail with transient tolerance up to 32V (non-operational stress rating). |
| BOP / BRP (Typ) | +30G / -30G - enables reliable switching with common ferrite magnets at air gaps ≤2.5 mm in cam/crank sensing. |
| Output Type | Open-drain N-channel - requires external pull-up; sinks up to 60 mA while limiting fault current to protect downstream logic. |
| Startup Time | 10 µs (typ) - ensures rapid valid output assertion after power-on, critical for real-time RPM measurement. |
| Operating Temperature | -40°C to +150°C - qualified for engine compartment placement without derating or heatsinking. |
| ESD Robustness | HBM 8 kV, CDM 1 kV - withstands handling and assembly stresses in automotive manufacturing environments. |
| Quiescent Current | 3–5 mA - enables low-power operation in always-on vehicle subsystems like body control modules. |
Pinout & Package
Available in SC59, SOT23 (Type S), SIP-3 (Ammo Pack), and SIP-3 (Bulk Pack) packages. All variants use identical 3-pin configuration with exposed pad thermal enhancement in SC59/SOT23.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VDD | Power input with integrated reverse-blocking diode and 28V zener clamp - eliminates need for external protection in 12V/24V systems. |
| 2 | GND | Ground reference for internal regulator and output stage - must be low-impedance path to minimize noise coupling into Hall element. |
| 3 | OUTPUT | Open-drain output with 60 mA current limit and zener clamp - interfaces directly to 3.3V/5V microcontrollers via pull-up resistor RL (1–10 kΩ typical). |
Key Features
| Feature | Design Value |
|---|---|
| Bipolar Latch Operation | South pole activates output (low), North pole releases - enables direction-agnostic position detection in rotating assemblies. |
| Chopper-Stabilized Sensing | Reduces thermal drift of BOP/BRP to ±5G over full temperature range - ensures consistent timing in BLDC commutation. |
| Integrated Supply Protection | Reverse-blocking diode + VDD zener clamp - prevents damage during battery jump-start or load-dump transients. |
| High ESD Immunity | 8 kV HBM - meets IATF 16949 assembly line ESD control requirements without additional shielding. |
| Automotive Qualification | AEC-Q100 Grade 0 (TJ = +170°C) - validated for under-hood applications including transmission control and steering angle sensing. |
Applications
| Engine Camshaft Position Sensing | Electric Power Steering (EPS) Motor Commutation |
|---|---|
Use Scenario: Detecting cam lobe passage in gasoline/diesel engines for variable valve timing synchronization. IC Role / Device Role / Timing Role: Hall latch provides edge-triggered digital signal aligned to cam phasing; output edges time fuel injection and ignition events. Use Value: ±30G sensitivity and 10 µs startup enable sub-degree crank-angle resolution at 8000 RPM without signal conditioning. |
Use Scenario: Providing rotor position feedback to EPS motor controller for precise 3-phase commutation. IC Role / Device Role / Timing Role: Latched output delivers deterministic phase-state transitions synchronized to motor rotation, eliminating jitter-induced torque ripple. Use Value: Chopper stabilization maintains <±1° electrical angle error across -40°C to +150°C, improving steering assist accuracy. |
| Transmission Input Shaft Speed Monitoring | Brake Caliper Position Feedback |
Use Scenario: Measuring input shaft RPM in automatic transmissions using gear tooth target wheel. IC Role / Device Role / Timing Role: Converts magnetic transitions into clean square-wave tach signal; open-drain output interfaces directly to gearbox ECU timer inputs. Use Value: 28V tolerant VDD and 60 mA sink capability allow direct integration without level-shifting or buffering in high-noise transmission environments. |
Use Scenario: Detecting caliper piston travel in electro-mechanical brake (EMB) systems for closed-loop actuation control. IC Role / Device Role / Timing Role: Provides absolute position latching per brake pulse cycle - output remains stable between magnetic field changes for safety-critical hold state. Use Value: AEC-Q100 Grade 0 qualification and 150°C ambient rating ensure functional integrity during sustained brake fade conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Hall-effect latch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AL3723QW-7 | Same pinout and sensitivity (BOP/BRP ±30G), but uses different die revision and test flow; not AEC-Q100 certified. | Limited to non-safety-critical industrial motion control; lacks PPAP documentation and IATF16949 traceability. | Select only for cost-sensitive non-automotive designs where AEC-Q100 is not mandated. |
| TLE4963-2M | Higher BOP/BRP (±40G typ), integrated pull-up, but no reverse-voltage protection on VDD. | Requires external reverse-protection diode in 24V truck systems; less robust in load-dump scenarios than AH3723Q-W-7. | Prefer when higher magnetic immunity is needed and board space allows discrete protection components. |
Compared with AL3723QW-7 and TLE4963-2M, the AH3723Q-W-7 uniquely combines AEC-Q100 Grade 0 qualification, integrated reverse-blocking diode, and ±30G sensitivity optimized for compact cam/crank sensors - making it the only drop-in solution for production automotive ECUs requiring zero redesign risk.
Availability
AH3723Q-W-7 is available at Aetrix Electronics and suitable for engine management systems, electric power steering modules, and transmission control units requiring stable component supply across extended temperature and voltage ranges.
Supply support for AH3723Q-W-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.
The AH372XQ series belongs to Diodes' AEC-Q100-qualified Hall-effect sensor product line, engineered specifically for high-reliability position and speed sensing in harsh automotive environments.
FAQ
What package types are offered for AH3723Q-W-7?
AH3723Q-W-7 is supplied in SC59, SOT23 (Type S), SIP-3 (Ammo Pack), and SIP-3 (Bulk Pack) packages. All share identical pinout (VDD-GND-OUTPUT) and magnetic polarity behavior: South pole activates output when applied to the part marking side for SOT23/SIP-3, and to the non-marking side for SC59.
How does the chopper-stabilized architecture improve performance?
The chopper-stabilized design actively cancels offset voltage drift in the Hall element and amplifier chain, reducing BOP/BRP variation to ±5G over -40°C to +150°C. This ensures consistent switching thresholds in under-hood applications where thermal cycling would otherwise cause timing errors in BLDC commutation.
Can AH3723Q-W-7 operate directly from a 24V truck battery?
Yes - AH3723Q-W-7 operates continuously from 3.0V to 28V and includes an integrated reverse-blocking diode and VDD zener clamp rated at 28V. It withstands 32V transients (non-operational stress rating) and requires no external protection for standard 24V commercial vehicle applications.
Is there a recommended external capacitor for power supply filtering?
Yes - a 10 nF to 100 nF ceramic capacitor (CIN) is recommended between VDD and GND, placed as close as possible to the device pins. This stabilizes the internal bandgap regulator and improves RF noise immunity, especially in high-EMI environments like engine bays and EPS motor housings.
AH3723Q-W-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:
- SC-59-3
AH3723Q-W-7 FAQ
1.How can I place an order for AH3723Q-W-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AH3723Q-W-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 AH3723Q-W-7 reliable?
The price and inventory of AH3723Q-W-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AH3723Q-W-7 is usually 5 days.
3.What payment methods are accepted for AH3723Q-W-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH3723Q-W-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH3723Q-W-7?
AH3723Q-W-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH3723Q-W-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 AH3723Q-W-7?
For technical support, including AH3723Q-W-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH3723Q-W-7 requirements.
6.How does Aetrix verify that AH3723Q-W-7 is sourced from the original manufacturer or authorized distributors?
All AH3723Q-W-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 AH3723Q-W-7 meets industry standards.
7.What is the process for return or replacement of AH3723Q-W-7?
All AH3723Q-W-7 units undergo pre-shipment inspection (PSI). If there is an issue with AH3723Q-W-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 AH3723Q-W-7 part is unused and in its original packaging.
Return procedure for AH3723Q-W-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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