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Diodes Incorporated AH1815-P-B
- Part No.:
- AH1815-P-B
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- 3-SIP
- Datasheet:
-
AH1815-P-B.pdf
- Description:
- MAGNETIC SWITCH OMNIPOLAR 3SIP
- Quantity:
- Payment:
- Shipping:
Inventory:879
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Product details
Overview
AH1815-P-B from Diodes Incorporated is a low-sensitivity, micropower omnipolar Hall-effect switch IC in SIP-3 package, designed for magnetic tamper detection in smart meters and contactless position sensing in battery-powered appliances. It operates from 2.5V to 5.5V, consumes only 8–16 µA average supply current at 3V, and switches on with either north or south magnetic pole (Bop ±255–540 G). Its chopper-stabilized architecture ensures stable operation from –40°C to +125°C.
For engineers reviewing the AH1815-P-B datasheet, AH1815-P-B pinout, AH1815-P-B application, or AH1815-P-B equivalent, key selection factors include its omnidirectional magnetic sensitivity, ultra-low power sleep mode (≤28 µA), open-drain output with 0.1 V saturation at 1 mA, and SIP-3 lead-form compatibility with through-hole assembly in utility metering and home appliance designs.
Technical Context
The AH1815 employs dual Hall plates and chopper stabilization to cancel offset drift, delivering <±40 G hysteresis (Bhy) and minimal temperature-dependent switch-point variation across –40°C to +125°C. Its sleep/awake logic cycles at 75–125 ms period, with 75–125 µs awake time, enabling precise magnetic sampling while maintaining 24 µW typical power consumption at 3V.
It features an open-drain output capable of sinking 2.5 mA, requiring external pull-up (10–100 kΩ); internal latch and power-switch control ensure reliable state retention without external components. The device is ESD-rated to >6 kV HBM and supports magnetic field detection perpendicular to the package marking side only.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.5 V to 5.5 V - Enables direct use with single-cell Li-ion, 3.3 V, or 5 V rails in portable and industrial systems. |
| Average Supply Current | 8–16 µA @ 3 V, 25°C - Supports multi-year battery life in smart meter tamper-detection circuits. |
| Omnipolar Switch Points | Bop = ±255–540 G, Brp = ±230–490 G - Detects either pole orientation without magnet polarity alignment during assembly. |
| Output Type | Open-drain, 2.5 mA sink - Interfaces directly with MCU GPIO or logic-level inputs using standard pull-up resistor. |
| Operating Temperature | –40°C to +125°C - Qualified for enclosed industrial enclosures and outdoor utility meter environments. |
| Hysteresis (Bhy) | ≥40 G - Prevents output chatter near switching threshold under fluctuating or noisy magnetic fields. |
| ESD Rating | >6 kV HBM - Robust handling during automated PCB assembly and field service. |
Pinout & Package
SIP-3 package: 3-pin straight-lead through-hole package with 2.51–2.57 mm height, 14.0–15.0 mm body length, and 1.24–1.30 mm lead spacing; optimized for high-reliability metering applications requiring mechanical stability and solder-joint integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VDD | Power supply input - Must be decoupled with 10–100 nF capacitor to ground for noise immunity and stable wake-up behavior. |
| 2 | GND | Ground reference - Shared return path for Hall sensor, logic, and output driver; requires low-impedance connection. |
| 3 | OUTPUT | Open-drain output - Sinks current when activated; requires external pull-up resistor (10–100 kΩ) to VDD or host logic rail. |
Key Features
| Feature | Design Value |
|---|---|
| Omnipolar magnetic detection | Switches on with either N- or S-pole exposure - Eliminates magnet orientation constraints in mechanical assembly. |
| Chopper-stabilized architecture | Reduces offset drift to <±0.1 mV/°C - Ensures consistent Bop/Brp over full temperature range without calibration. |
| Micropower sleep mode | IDD(Sleep) ≤28 µA max - Extends battery life in always-on tamper-detection circuits beyond 10 years. |
| RF noise immunity | Validated against common 800–2500 MHz interference sources - Maintains reliable switching in wireless-enabled smart meters. |
| Lead-free & halogen-free construction | RoHS 2 compliant, <900 ppm Br+Cl, <1000 ppm Sb - Meets EU environmental directives and IPC-1752A reporting requirements. |
Applications
| Smart Meter Tamper Detection | Liquid Level Sensing |
|---|---|
|
Use Scenario: Detect unauthorized meter cover removal via embedded magnet and reed-switch replacement. IC Role / Device Role / Timing Role: Contactless magnetic switch providing tamper-alert signal to meter's microcontroller upon cover displacement. Use Value: Eliminates mechanical wear and contact corrosion issues of reed switches while supporting IP68 sealing and 15+ year field life. |
Use Scenario: Monitor coffee level in automatic brewer reservoir using float-mounted magnet. IC Role / Device Role / Timing Role: Proximity detector triggering fill-complete or low-level alert based on magnet position relative to tank wall. Use Value: Enables non-invasive, sealed-tank design with no moving contacts or fluid-exposed electronics. |
| Portable Display Lid Switch | Industrial Equipment Cover Interlock |
|
Use Scenario: Auto-suspend tablet or notebook display when lid closes using integrated magnet. IC Role / Device Role / Timing Role: Low-power wake/sleep trigger for system controller; activates only during magnetic transition events. Use Value: Reduces standby current by >95% vs. capacitive or mechanical switches, extending battery runtime. |
Use Scenario: Verify safety enclosure closure on HVAC control panel before enabling high-voltage operation. IC Role / Device Role / Timing Role: Safety-critical interlock sensor feeding into PLC or dedicated safety monitor circuit. Use Value: Provides fail-safe, non-contact verification with guaranteed hysteresis margin to prevent nuisance tripping. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar omnipolar Hall-effect switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ALLEGRO A3212LLHLT-T | Higher sensitivity (Bop ±20–40 G), 3.3 V only, SOT-23 package | Requires tighter magnet placement tolerance; unsuitable for low-field environments like large-gap smart meter covers | Select when higher sensitivity and surface-mount assembly are prioritized over wide voltage range and through-hole reliability |
| MELEXIS US1881EUA-ABA-000-REEL | Wider supply range (2.7–24 V), bipolar latching output, TSOT-23 package | Outputs latched state until opposite pole reapplied - incompatible with momentary proximity detection in lid switches | Choose for high-voltage industrial sensors where polarity-based state memory is required, not for simple on/off presence detection |
Compared with A3212LLHLT-T and US1881EUA-ABA-000-REEL, AH1815-P-B uniquely balances ultra-low power, wide 2.5–5.5 V operation, and SIP-3 mechanical robustness-making it optimal for cost-sensitive, long-life, through-hole smart meter and appliance applications where field strength varies and polarity is uncontrolled.
Availability
AH1815-P-B is available at Aetrix Electronics and suitable for smart meter tamper detection, liquid level sensing in home appliances, and industrial equipment interlocks requiring stable component supply across extended production lifecycles.
Supply support for AH1815-P-B 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, energy-efficient solutions for industrial, computing, and consumer markets.
AH1815 belongs to Diodes' Hall-effect sensor product line, engineered specifically for battery-constrained, contactless position and tamper detection in utility infrastructure and white goods-emphasizing low power, thermal stability, and manufacturability.
FAQ
What is the magnetic field polarity requirement for AH1815-P-B activation?
The AH1815-P-B activates with either north or south magnetic pole applied perpendicular to the marked side of the SIP-3 package. Its omnipolar design eliminates need for magnet orientation control during assembly, supporting simplified mechanical integration in smart meters and lid switches where magnet polarity may vary.
Can AH1815-P-B operate directly from a 3.3 V microcontroller I/O rail?
Yes-AH1815-P-B operates across 2.5 V to 5.5 V, making it fully compatible with 3.3 V logic rails. Its open-drain output interfaces directly with MCU GPIO pins configured as input with internal or external pull-up; no level-shifting circuitry is required.
Is external capacitance required on the VDD pin?
Yes-a 10 nF to 100 nF ceramic capacitor between VDD and GND is recommended per the datasheet to stabilize power during wake-up transitions and improve RF noise immunity. Omission may cause erratic switching or delayed output response in electrically noisy environments like smart meter enclosures.
Does AH1815-P-B support reflow soldering?
No-AH1815-P-B in SIP-3 bulk packaging is intended for through-hole wave or selective soldering only. Its SIP-3 lead form and thermal profile (max 150°C junction) are not rated for standard lead-free reflow (260°C peak). Use SC59 or SOT553 variants for SMT assembly.
AH1815-P-B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 3-SIP
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- Omnipolar Switch
- Technology:
- Hall Effect
- Polarization:
- North Pole, South Pole
- Sensing Range:
- ±54mT Trip, ±49mT Release
- Test Condition:
- -40°C ~ 125°C
- Voltage - Supply:
- 2.5V ~ 5.5V
- Current - Supply (Max):
- 12mA
- Current - Output (Max):
- 2.5mA
- Output Type:
- Open Drain
- Features:
- Sleep Mode
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 3-SIP
AH1815-P-B FAQ
1.How can I place an order for AH1815-P-B through Aetrix?
Please submit a Request for Quotation (RFQ) for AH1815-P-B 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 AH1815-P-B reliable?
The price and inventory of AH1815-P-B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AH1815-P-B is usually 5 days.
3.What payment methods are accepted for AH1815-P-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH1815-P-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH1815-P-B?
AH1815-P-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH1815-P-B 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 AH1815-P-B?
For technical support, including AH1815-P-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH1815-P-B requirements.
6.How does Aetrix verify that AH1815-P-B is sourced from the original manufacturer or authorized distributors?
All AH1815-P-B 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 AH1815-P-B meets industry standards.
7.What is the process for return or replacement of AH1815-P-B?
All AH1815-P-B units undergo pre-shipment inspection (PSI). If there is an issue with AH1815-P-B, 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 AH1815-P-B part is unused and in its original packaging.
Return procedure for AH1815-P-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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