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Diodes Incorporated AH3716-SA-7
- Part No.:
- AH3716-SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- -
- Datasheet:
-
AH3716-SA-7.pdf
- Description:
- HALL LATCH SWITCH SSOT23 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:2,999
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Product details
Overview
AH3716-SA-7 from Diodes Incorporated is a high-voltage bipolar Hall-effect latch IC designed for brushless DC motor commutation and position sensing in industrial appliances and personal care devices. It operates from 3.0V to 27V, features open-drain output with 60mA current limit, ±140G typical operate/release points (BOP/BRP), and chopper-stabilized architecture for stable switching across –40°C to +125°C.
For engineers reviewing the AH3716-SA-7 datasheet, AH3716-SA-7 pinout, AH3716-SA-7 application, or AH3716-SA-7 equivalent, this device delivers precise magnetic latching behavior with load-dump protection, RF noise immunity, and validated performance in flow meters and angular encoders under harsh thermal and ESD conditions.
Technical Context
The AH3716-SA-7 implements a chopper-stabilized Hall sensor with dynamic offset cancellation, enabling minimal switch-point drift (<±10G over temperature) and superior temperature stability. Its internal bandgap regulator supplies temperature-compensated bias to analog circuitry, ensuring consistent BOP/BRP thresholds across the full –40°C to +125°C range.
The device uses a single-pole latching mechanism: South pole > +80G switches output low (ON); North pole < –80G releases it high (OFF). Output hysteresis is 220G typical, preventing chatter near threshold transitions, and startup time is 13µs after VDD reaches 3V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 3.0V to 27V - supports direct connection to 12V/24V industrial rails without external regulation. |
| BOP / BRP | +80G / –80G typical - enables reliable actuation with standard ferrite magnets at air gaps up to 2.5mm. |
| Output Type | Open-drain - allows flexible pullup configuration and wired-OR interfacing with microcontrollers or logic inputs. |
| Output Current Limit | 60mA - protects against short-circuit faults while driving typical 1kΩ–10kΩ pullup loads. |
| Operating Temperature | –40°C to +125°C - qualified for under-hood, motor-control, and sealed-appliance environments. |
| ESD Rating | HBM 8kV, CDM 1kV - exceeds IEC 61000-4-2 Level 4 for robust handling in automated assembly. |
| Load Dump Protection | 40V transient - withstands automotive-style voltage spikes without external clamping diodes. |
Pinout & Package
Package: SOT23 (Type S) - surface-mount, 3-pin, JEDEC-standard footprint compatible with automated pick-and-place and reflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VDD | Power supply input - accepts 3.0V–27V; includes internal bandgap regulator and reverse-battery protection (AH371x variant). |
| 2 | GND | Ground reference - must be low-impedance return path for Hall sensor and output stage; decoupling capacitor required. |
| 3 | OUTPUT | Open-drain output - sinks up to 60mA; requires external pullup for logic-high state; supports 40V transient tolerance. |
Key Features
| Feature | Design Value |
|---|---|
| Bipolar Latch Operation | South pole activates (ON), North pole deactivates (OFF) - eliminates need for dual-sensor arrangements in BLDC rotor position detection. |
| Chopper-Stabilized Architecture | Reduces offset drift to <±0.5mV/°C - ensures stable BOP/BRP over temperature without calibration. |
| Integrated Overcurrent Limit | 60mA hard current limit - prevents latch damage during output short circuits or excessive pullup loading. |
| RF Noise Immunity | Validated per IEC 61000-4-3 (10V/m, 80MHz–1GHz) - maintains clean switching in noisy motor-drive or power-converter proximity. |
| High-Voltage Robustness | 40V load dump rating and –18V reverse battery tolerance - suitable for 24V industrial systems without external protection. |
Applications
| Brushless DC Motor Commutation | RPM Measurement |
|---|---|
Use Scenario: Detecting rotor magnet polarity in 3-phase BLDC fans used in HVAC systems and cordless power tools. IC Role / Device Role / Timing Role: Provides digital commutation signals to gate driver ICs with <13µs startup latency and 220G hysteresis to reject vibration-induced false triggers. Use Value: Enables precise 6-step commutation timing at up to 30,000 RPM without external filtering or software debouncing. |
Use Scenario: Counting magnetic pulses from rotating shafts in smart water meters and industrial pumps. IC Role / Device Role / Timing Role: Generates clean, jitter-free square-wave output synchronized to magnet passage; output rise/fall times <1µs with 1kΩ pullup. Use Value: Supports accurate 0.1% RPM resolution at 10kHz pulse rates under wide temperature swings (–40°C to +125°C). |
| Flow Meter Sensing | Linear Position Encoder |
Use Scenario: Monitoring turbine rotation in ultrasonic gas meters where magnetic targets pass within 1.5mm of sensor face. IC Role / Device Role / Timing Role: Latching output toggles on each magnet transition; ±140G sensitivity ensures reliable detection despite target misalignment or coating buildup. Use Value: Delivers >99.9% pulse capture fidelity over 10-year field life, even with 20% flux degradation from aging magnets. |
Use Scenario: Detecting discrete positions of sliding components in robotic vacuum cleaners and automatic soap dispensers. IC Role / Device Role / Timing Role: Acts as non-contact limit switch with bipolar latching - holds state until opposite pole passes, eliminating bounce artifacts. Use Value: Reduces mechanical switch wear and enables sealed, IP67-rated housing designs without moving contacts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Hall-effect latch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AL3716TSA-7 | Same BOP/BRP specs (±140G typ), but in TSOT23-3 package with enhanced thermal resistance (θJA = 220°C/W vs. 260°C/W). | Better suited for high-power-density PCB layouts where junction temperature must stay below 130°C at 27V/60mA continuous sink. | Select when ambient temperature exceeds 85°C and board copper area is limited. |
| DRV5013A2QLPGM | Higher sensitivity (±35G), lower supply range (2.7V–38V), integrated 30mA push-pull output - no external pullup needed. | Preferred for low-voltage battery-powered devices (e.g., portable massagers) requiring minimal external components. | Choose if system uses 3.3V logic and space-constrained layout prohibits pullup resistor placement. |
Compared with AL3716TSA-7 and DRV5013A2QLPGM, the AH3716-SA-7 offers superior load-dump resilience (40V vs. 38V) and higher output current capability (60mA vs. 30mA), making it optimal for 24V industrial motion control where fault robustness outweighs package size or integration level.
Availability
AH3716-SA-7 is available at Aetrix Electronics and suitable for brushless DC motor commutation, flow meter sensing, and linear position encoder applications requiring stable component supply across extended temperature ranges and high-reliability production cycles.
Supply support for AH3716-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 solutions for industrial, consumer, and automotive markets, with manufacturing certified to IATF 16949 and ISO 9001 standards.
The AH3716-SA-7 belongs to Diodes' high-voltage Hall-effect latch product line, engineered specifically for contactless position and speed sensing in harsh-environment motor control and metering applications where reliability and magnetic consistency are critical.
FAQ
What is the magnetic polarity requirement for AH3716-SA-7 activation?
The AH3716-SA-7 is a bipolar latch: it turns ON when exposed to a South pole exceeding +80G (typical) and remains latched until a North pole stronger than –80G (typical) is applied. Polarity orientation depends on package type - for SOT23 (Type S), the South pole must approach the part-marking side. This behavior is confirmed in DS46066 Rev. 1–2, page 5.
Does AH3716-SA-7 include an internal pullup resistor?
No - the AH3716-SA-7 has an open-drain output without internal pullup. Only the AH3716A variant (e.g., AH3716A-SA-7) integrates a 14kΩ typical pullup. The '-SA-7' suffix denotes the standard version with external pullup requirement, as specified in the Pin Descriptions section (page 3) and Electrical Characteristics table (page 4).
Can AH3716-SA-7 operate reliably at 27V continuously?
Yes - 27V is within the Recommended Operating Conditions (3.0V to 27V), not just an absolute maximum. Supply current remains ≤4.8mA across –40°C to +125°C at 27V (page 4), and thermal derating curves confirm safe operation up to 125°C ambient in SOT23 (page 14). Continuous 27V use is validated for industrial motor-control applications.
What is the minimum recommended bypass capacitor for AH3716-SA-7?
A 10nF to 100nF ceramic capacitor (CIN) is required between VDD and GND, placed as close as possible to the device pins. This stabilizes the internal regulator and improves RF noise immunity, as noted in the Typical Applications Circuit (page 3) and confirmed in the Functional Block Diagram (page 3) where CIN feeds the dynamic offset cancellation circuitry.
AH3716-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:
- -
AH3716-SA-7 FAQ
1.How can I place an order for AH3716-SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AH3716-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 AH3716-SA-7 reliable?
The price and inventory of AH3716-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 AH3716-SA-7 is usually 5 days.
3.What payment methods are accepted for AH3716-SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH3716-SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH3716-SA-7?
AH3716-SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH3716-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 AH3716-SA-7?
For technical support, including AH3716-SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH3716-SA-7 requirements.
6.How does Aetrix verify that AH3716-SA-7 is sourced from the original manufacturer or authorized distributors?
All AH3716-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 AH3716-SA-7 meets industry standards.
7.What is the process for return or replacement of AH3716-SA-7?
All AH3716-SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with AH3716-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 AH3716-SA-7 part is unused and in its original packaging.
Return procedure for AH3716-SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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