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Diodes Incorporated AH1892-Z-7
- Part No.:
- AH1892-Z-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- SOT-553
- Datasheet:
-
AH1892-Z-7.pdf
- Description:
- MAGNETIC SWITCH OMNIPOLAR SOT553
- Quantity:
- Payment:
- Shipping:
Inventory:255
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Product details
Overview
AH1892-Z-7 from Diodes Incorporated is a programmable micropower omnipolar Hall-effect sensor switch IC with dual magnetic sensitivity bands (Bop/Brp), internal pull-up/pull-down, and 1.6V–3.6V operation. It delivers 4.3µA typical average supply current at 1.8V, supports north/south pole detection, and is packaged in SOT553 for space-constrained portable electronics.
For engineers reviewing the AH1892-Z-7 datasheet, AH1892-Z-7 pinout, AH1892-Z-7 application, or AH1892-Z-7 equivalent, this page provides verified technical context, magnetic switching thresholds, band-select timing behavior, ESD robustness (8kV on VDD/OUT), and real-world use cases in cover-detect and position-sensing systems.
Technical Context
The AH1892-Z-7 uses a chopper-stabilized architecture to achieve ±0.1mT typical switch-point drift over temperature and insensitivity to mechanical stress. Its hibernating clocking system alternates between 50–100µs awake pulses and 50–100ms sleep intervals, enabling ultra-low power operation.
Magnetic sensitivity is selected via the BSEL pin: grounded for low-band (±18–55G operate/release), or ≥1.4V/unconnected for high-band (±43–80G). Band transition completes within 100–200.1ms, and output validity requires two full awake phases after BSEL change.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 1.6V to 3.6V - compatible with Li-ion battery discharge profiles and 1.8V/3.3V microcontrollers |
| Avg. Supply Current | 4.3µA @ 1.8V - enables multi-year operation in coin-cell-powered devices |
| Omnipolar Detection | Activates on either N or S pole - eliminates magnet polarity orientation constraints in mechanical assembly |
| Magnetic Hysteresis | ≥10G - prevents chatter during slow-field transitions near threshold |
| ESD Rating | 8kV HBM on VDD/OUT pins - withstands handling and board-level electrostatic events without protection circuitry |
| Operating Temp | −40°C to +85°C - validated for consumer and industrial ambient environments |
| Output Type | Open-drain, sink capable up to 2.5mA - directly interfaces with MCU GPIO or logic-level inputs without external pull-up |
Pinout & Package
Package: SOT553 (1.7mm × 1.2mm × 0.6mm, 5-pin, low-profile leaded package).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VDD | Positive supply input | Accepts 1.6–3.6V; internal regulation powers analog core and digital logic |
| 2 NC | No connection | Internally unconnected; may be left floating or tied to GND for mechanical stability |
| 3 BSEL | Band select control | Logic-low (≤0.5V) selects low-band sensitivity; ≥1.4V or open selects high-band |
| 4 GND | Ground reference | Return path for supply and output current; must be low-impedance for stable switching |
| 5 OUTPUT | Open-drain output | Sinks current when activated (B > Bop); high-impedance when inactive (B < Brp) |
Key Features
| Feature | Design Value |
|---|---|
| Programmable sensitivity bands | Two factory-trimmed magnetic thresholds (low/high) selected dynamically via BSEL pin - enables firmware-driven mode switching without hardware changes |
| Chopper stabilization | Eliminates offset drift and improves thermal stability - ensures consistent Bop/Brp across −40°C to +85°C |
| Integrated pull-up/pull-down | No external resistors needed for output biasing - reduces BOM count and PCB area in compact designs |
| RF noise immunity | Validated against common wireless interference sources - maintains reliable switching in Bluetooth/WiFi-enabled handhelds |
| Miniature SOT553 footprint | 1.7mm × 1.2mm body with 0.5mm pitch - fits under display bezels and inside slim phone hinges |
Applications
| Cellular Phone Cover Detect | Gaming Device Lid Switch |
|---|---|
|
Use Scenario: Detects flip cover closure on smartphones to disable touchscreen and backlight. IC Role / Device Role / Timing Role: Omnipolar Hall switch providing polarity-agnostic activation with 100ms wake-to-output latency after BSEL update. Use Value: Enables zero-power standby mode with 4.3µA avg. current draw, extending battery life between charges. |
Use Scenario: Monitors clamshell lid position in handheld gaming consoles to suspend/resume gameplay. IC Role / Device Role / Timing Role: Low-band sensitivity mode (BSEL = GND) triggers reliably with weak magnets embedded in thin plastic lids. Use Value: Eliminates mechanical switches prone to wear, while maintaining <100ms response time after lid motion begins. |
| Tablet PC Docking Sensor | Printer Tray Position Monitor |
|
Use Scenario: Confirms secure magnetic attachment of detachable keyboards to tablets. IC Role / Device Role / Timing Role: High-band mode (BSEL = open) rejects stray fields from nearby speakers or motors during docking. Use Value: Prevents false triggers in electromagnetically noisy environments without shielding or filtering components. |
Use Scenario: Verifies paper tray insertion and alignment in inkjet printers before print initiation. IC Role / Device Role / Timing Role: Mounted on tray carrier; detects magnet movement with ±12–45G release hysteresis to avoid bounce. Use Value: Reduces misfeeds by ensuring mechanical engagement is complete prior to motor activation. |
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 |
|---|---|---|---|
| Melexis US5881LUA-ABA-000-RE | Fixed sensitivity (no BSEL pin); 2.7–24V supply; 3.5µA avg. current | Lacks programmable band selection; suited for higher-voltage industrial sensors, not battery-critical portable gear | Choose when fixed threshold and wide voltage range outweigh need for firmware-adjustable sensitivity |
| Allegro A1120ELHLT-T | Omnipolar, no band select; 3–24V supply; 4mA avg. current; TO-92 package | Higher power consumption and larger through-hole package; no low-voltage (1.6V) support | Prefer for legacy through-hole assembly or non-battery applications where size and micropower are secondary |
Compared with US5881LUA-ABA-000-RE and A1120ELHLT-T, the AH1892-Z-7 uniquely combines sub-5µA operation, 1.6V start-up, SOT553 miniaturization, and dynamic sensitivity tuning-making it optimal for next-gen portable electronics requiring adaptive magnetic sensing.
Availability
AH1892-Z-7 is available at Aetrix Electronics and suitable for cellular phone cover detect, tablet docking verification, and printer tray position monitoring requiring stable component supply, long-lifecycle availability, and RoHS-compliant packaging.
Supply support for AH1892-Z-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 manufacturer of discrete semiconductors and integrated circuits, specializing in high-reliability, energy-efficient solutions for consumer, industrial, and computing markets.
The AH1892 belongs to Diodes' Hall-effect sensor product line, engineered specifically for ultra-low-power, space-constrained magnetic position detection in battery-operated portable electronics.
FAQ
What is the function of the NC pin on the AH1892-Z-7 SOT553 package?
Pin 2 is a no-connect (NC) terminal with no internal connection. It may be left unconnected or tied to ground for mechanical reinforcement during reflow soldering. It carries no electrical function and does not affect device operation or magnetic performance.
How does BSEL pin voltage affect magnetic sensitivity, and what happens if it's left floating?
When BSEL ≤0.5V, the device operates in low-band mode (Bop ≈ ±18–55G); at ≥1.4V or open, it defaults to high-band (Bop ≈ ±43–80G). Floating BSEL is electrically equivalent to high-band selection due to internal design - no external pull-up is required.
Can the AH1892-Z-7 drive an LED directly without a current-limiting resistor?
No. The output is open-drain with 2.5mA sink capability. Driving even a low-current LED (e.g., 2mA) requires an external series resistor to limit current and prevent exceeding VOL spec (0.2V @ 1mA) or damaging the output stage under sustained load.
Why does output validity require two full awake phases after changing BSEL state?
The internal hibernation sequencer samples magnetic field only during awake periods. A BSEL change must propagate through one full sleep/awake cycle to configure analog front-end trim, then a second awake phase to capture and latch valid magnetic state - ensuring deterministic switching behavior.
AH1892-Z-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOT-553
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Omnipolar Switch
- Technology:
- Hall Effect
- Polarization:
- North Pole, South Pole
- Sensing Range:
- Programmable
- Test Condition:
- -
- Voltage - Supply:
- 1.6V ~ 3.6V
- Current - Supply (Max):
- 2.1mA (Typ)
- Current - Output (Max):
- 2.5mA
- Output Type:
- Push-Pull
- Features:
- Programmable Trip Point
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-553
AH1892-Z-7 FAQ
1.How can I place an order for AH1892-Z-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AH1892-Z-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 AH1892-Z-7 reliable?
The price and inventory of AH1892-Z-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AH1892-Z-7 is usually 5 days.
3.What payment methods are accepted for AH1892-Z-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH1892-Z-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH1892-Z-7?
AH1892-Z-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH1892-Z-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 AH1892-Z-7?
For technical support, including AH1892-Z-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH1892-Z-7 requirements.
6.How does Aetrix verify that AH1892-Z-7 is sourced from the original manufacturer or authorized distributors?
All AH1892-Z-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 AH1892-Z-7 meets industry standards.
7.What is the process for return or replacement of AH1892-Z-7?
All AH1892-Z-7 units undergo pre-shipment inspection (PSI). If there is an issue with AH1892-Z-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 AH1892-Z-7 part is unused and in its original packaging.
Return procedure for AH1892-Z-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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