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Diodes Incorporated AH1807-P-B
- Part No.:
- AH1807-P-B
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- 3-SIP
- Datasheet:
-
AH1807-P-B.pdf
- Description:
- MAGNETIC SWITCH OMNIPOLAR 3SIP
- Quantity:
- Payment:
- Shipping:
Inventory:15,286
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Product details
Overview
AH1807-P-B from Diodes Incorporated is a medium sensitivity, micropower omnipolar Hall-effect switch IC designed for magnetic tamper detection in smart electricity meters and low-power industrial position sensing. It operates from 2.5V to 5.5V, consumes only 8–16 µA average supply current at 3V, features open-drain output with 0.1–0.3V on-state voltage at 1mA, and functions across –40°C to +125°C.
For engineers reviewing the AH1807 datasheet, AH1807 pinout, AH1807 application, or AH1807 equivalent, this device is selected for battery-powered proximity switching where polarity-agnostic magnetic actuation, chopper-stabilized thermal stability, and SIP-3L package compatibility with through-hole assembly are critical design requirements.
Technical Context
The AH1807 uses dual Hall plates and chopper stabilization to cancel offset drift and achieve ±15 Gauss operate point tolerance over temperature. Its sleep/awake duty cycle (0.1% typical) enables ultra-low average power consumption while maintaining 75–125 µs response latency after magnetic field change.
It delivers true omnipolar operation: output switches low for either North or South pole exposure above Bop (±60–105 Gauss), releases below Brp (±40–100 Gauss), and remains off with zero field-enabling single-sensor position detection without magnet orientation constraints.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.5V to 5.5V - supports direct connection to Li-ion, 3.3V, or 5V rails without regulation. |
| Average Supply Current | 8–16 µA @ 3V, 25°C - enables >10-year battery life in meter tamper detection. |
| Output Type | Open-drain - allows flexible pull-up to any logic rail up to 5.5V and wired-OR interfacing. |
| Operate Point (Bop) | ±60–105 Gauss - medium sensitivity balances noise immunity and reliable actuation distance. |
| Hysteresis (Bhy) | 10–20 Gauss - prevents chatter near threshold in vibrating or noisy mechanical environments. |
| Operating Temperature | –40°C to +125°C - qualified for outdoor smart meter enclosures and industrial control panels. |
| ESD Rating | 6 kV HBM - withstands handling and field-level electrostatic discharge without protection circuitry. |
Pinout & Package
Package: SIP-3L (Straight Lead, Bulk Pack). Compact 3-pin through-hole package with 1.55 mm pitch, 4.1 mm height, and 14 mm body length-optimized for automated insertion and high-density PCB layouts in utility meter modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VDD | Power input - must be decoupled with 10–100 nF capacitor per datasheet recommendation. |
| 2 | GND | Ground reference - shared return path for Hall sensor, logic, and output driver. |
| 3 | OUTPUT | Open-drain output - sinks up to 2.5 mA; requires external pull-up (10–100 kΩ) to define logic-high level. |
Key Features
| Feature | Design Value |
|---|---|
| Omnipolar magnetic actuation | Responds identically to North or South pole - eliminates magnet orientation dependency in mechanical assemblies. |
| Chopper-stabilized architecture | Reduces temperature-induced switch point drift to <±15 Gauss over full range - ensures consistent trip thresholds in unregulated environments. |
| Micropower sleep mode | 5–28 µA sleep current - enables multi-year operation on coin-cell batteries in tamper-detection circuits. |
| RF noise immunity | Validated against common industrial EMI sources - maintains stable output without additional filtering in noisy meter cabinets. |
| High ESD robustness | 6 kV HBM rating - survives handling and field installation without external TVS diodes. |
Applications
| Smart Electricity Meter Tamper Detection | Industrial Door/Tray Position Sensing |
|---|---|
|
Use Scenario: Detect unauthorized access to meter housing via magnetic cover removal or shield displacement. IC Role / Device Role / Timing Role: Hall switch providing latched ON/OFF state indicating presence/absence of shielding magnet. Use Value: Enables tamper event logging with <16 µA average current draw - extends battery backup life beyond 10 years. |
Use Scenario: Monitor open/closed status of control cabinet doors or removable equipment trays in factory automation systems. IC Role / Device Role / Timing Role: Contactless position detector interfaced to microcontroller GPIO with debounced digital input. Use Value: Eliminates mechanical switch wear and contact bounce; SIP-3L mounting withstands repeated vibration and thermal cycling. |
| Consumer Appliance Lid Detection | Level Detection in Fluid/Granular Containers |
|
Use Scenario: Confirm closure of washing machine drum lid or dishwasher door before initiating cycle. IC Role / Device Role / Timing Role: Safety interlock switch ensuring power disable when lid is unlatched. Use Value: Omnipolar operation allows use of low-cost ferrite magnets regardless of polarity orientation during assembly. |
Use Scenario: Indicate fill level in water tanks or hopper bins using float-mounted magnets. IC Role / Device Role / Timing Role: Threshold-based proximity sensor triggering at fixed vertical positions. Use Value: 10–20 Gauss hysteresis prevents false toggling due to fluid slosh or mechanical oscillation near trip point. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Hall-effect switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Melexis US1881 | Higher sensitivity (Bop ±30G), higher IDD(avg) (25 µA), SOT23-3 package | Better for weak-field or short-gap sensing; less suitable for long-life battery use | Select when magnetic air gap is constrained and power budget allows >2× current draw |
| Allegro A1120EUA-T | Bipolar-only (South pole only), wider VDD range (3–24V), TO-92 package | Requires magnet polarity control; suited for high-voltage industrial controls | Select when system uses strong magnets and needs extended voltage headroom beyond 5.5V |
Compared with US1881 and A1120EUA-T, the AH1807-P-B uniquely balances medium sensitivity, sub-20 µA average current, omnipolar operation, and SIP-3L through-hole compatibility-making it optimal for cost-sensitive, long-life, mechanically flexible tamper and position sensing in utility and industrial hardware.
Availability
AH1807-P-B is available at Aetrix Electronics and suitable for smart meter tamper detection, industrial position sensing, and consumer appliance safety interlocks requiring stable component supply, RoHS-compliant through-hole assembly, and long-term lifecycle support.
Supply support for AH1807-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 components for industrial, automotive, and consumer markets.
The AH1807 belongs to Diodes' Hall-effect switch product line, engineered specifically for ultra-low-power, polarity-agnostic magnetic sensing in utility metering and industrial control applications where longevity and environmental robustness are mandatory.
FAQ
What is the maximum recommended pull-up resistor value for the AH1807-P-B open-drain output?
The datasheet specifies a recommended pull-up resistance range of 10 kΩ to 100 kΩ. Using 100 kΩ maximizes current savings but increases rise time; 10 kΩ ensures fast edge transitions (<1 µs) while drawing ≤0.5 mA from the pull-up rail. Selection depends on required signal slew rate and system power budget.
Does the AH1807-P-B require an external bypass capacitor?
Yes - a 10 nF to 100 nF ceramic capacitor between VDD and GND is required per the datasheet to stabilize the internal regulator and enhance RF noise immunity. Omitting it may cause erratic switching or increased susceptibility to EMI in electrically noisy environments like smart meter enclosures.
Can the AH1807-P-B operate reliably at 2.5V supply with full magnetic specification?
Yes - all magnetic characteristics (Bop, Brp, Bhy) and electrical parameters (IDD, VOUT_ON) are guaranteed across the full 2.5V–5.5V range, including at 2.5V. The chopper-stabilized design maintains performance down to minimum VDD without calibration or adjustment.
Is the SIP-3L package of AH1807-P-B compatible with wave soldering processes?
Yes - the SIP-3L package is rated for standard wave soldering profiles per JEDEC J-STD-020. Its lead finish is matte tin, and thermal performance data confirms safe operation up to 230 mW at 25°C ambient, supporting typical industrial reflow and wave soldering cycles without derating.
AH1807-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:
- ±11.5mT Trip, ±10mT Release
- Test Condition:
- -40°C ~ 125°C
- Voltage - Supply:
- 2.5V ~ 5.5V
- Current - Supply (Max):
- 16µA
- Current - Output (Max):
- 2.5mA
- Output Type:
- Open Drain
- Features:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 3-SIP
AH1807-P-B FAQ
1.How can I place an order for AH1807-P-B through Aetrix?
Please submit a Request for Quotation (RFQ) for AH1807-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 AH1807-P-B reliable?
The price and inventory of AH1807-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 AH1807-P-B is usually 5 days.
3.What payment methods are accepted for AH1807-P-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH1807-P-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH1807-P-B?
AH1807-P-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH1807-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 AH1807-P-B?
For technical support, including AH1807-P-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH1807-P-B requirements.
6.How does Aetrix verify that AH1807-P-B is sourced from the original manufacturer or authorized distributors?
All AH1807-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 AH1807-P-B meets industry standards.
7.What is the process for return or replacement of AH1807-P-B?
All AH1807-P-B units undergo pre-shipment inspection (PSI). If there is an issue with AH1807-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 AH1807-P-B part is unused and in its original packaging.
Return procedure for AH1807-P-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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