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Diodes Incorporated AH1885-ZG-7
- Part No.:
- AH1885-ZG-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- SOT-553
- Datasheet:
-
AH1885-ZG-7.pdf
- Description:
- MAGNETIC SWITCH OMNIPOLAR SOT553
- Quantity:
- Payment:
- Shipping:
Inventory:1,480
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Product details
Overview
AH1885-ZG-7 from Diodes Incorporated is a micropower, ultra-sensitive Hall effect switch with dual CMOS outputs and two integrated Hall plates, designed for battery-powered handheld devices. It operates from 1.65V to 3.3V, consumes only 7–12 µA average supply current at 1.8V, and features ±37 G operate point (Bop), 8 G hysteresis, and active-low Out1 / active-high Out2 complementary outputs. Used in cellular phones for flip-cover detection.
For engineers reviewing the AH1885-ZG-7 datasheet, AH1885-ZG-7 pinout, AH1885-ZG-7 application, or AH1885-ZG-7 equivalent, this page delivers verified magnetic thresholds, dual-output timing behavior, SOT553 package layout, and RoHS-compliant green packaging details essential for low-power sensor integration.
Technical Context
The AH1885-ZG-7 implements chopper-stabilized Hall sensing with offset cancellation across both Hall plates, enabling stable operation over −40°C to +85°C with <±0.1 G/°C switch-point drift. Its dual-output architecture provides simultaneous active-low (Out1) and active-high (Out2) signals-complementary by design-eliminating external inverters in position-sensing logic.
Internal power switching and latch control ensure magnetic state retention until flux density crosses release point (Brp), delivering clean hysteresis of 3–8 G. RF noise immunity and ESD robustness (>4 kV HBM) support reliable operation in noisy portable electronics environments without additional filtering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 1.65 V to 3.3 V - enables direct interface with Li-ion/Li-poly battery rails and low-voltage microcontrollers |
| Avg. Supply Current | 7–12 µA at 1.8 V - extends battery life in always-on cover-detection circuits beyond 1 year on coin cell |
| Operate Point (Bop) | ±18 to ±59 G - detects weak magnets at >3 mm air gap, suitable for thin clamshell designs |
| Hysteresis (Bhy) | 3–8 G - prevents chatter during slow magnet approach/retraction in mechanical actuation |
| Output Configuration | Complementary Out1 (active-low) / Out2 (active-high) - drives logic directly without external inversion |
| Operating Temp | −40°C to +85°C - qualified for consumer handheld use without derating |
| ESD Rating | >4 kV HBM - survives handling and assembly without added protection diodes |
Pinout & Package
Package: SOT553 - 5-pin, 1.7 mm × 1.2 mm × 0.6 mm surface-mount package with exposed thermal pad (not electrically connected); RoHS-compliant "Green" molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Out2) | Digital output | Active-high complementary signal; sinks ≤0.5 mA, VOH ≥ Vdd−0.2 V |
| 2 (GND) | Power reference | Primary ground return for Hall core, logic, and output drivers |
| 3 (NC) | No connection | Internally unconnected; must be left floating or tied to GND per layout guidelines |
| 4 (Vdd) | Power input | Supplies internal regulator, Hall plates, and CMOS drivers; bypass capacitor required |
| 5 (Out1) | Digital output | Active-low primary signal; sources ≤0.5 mA, VOL ≤ 0.2 V |
Key Features
| Feature | Design Value |
|---|---|
| Micropower operation | 7–12 µA avg. current enables multi-year battery life in always-on proximity sensing |
| North/south pole sensitivity | Dual Hall plates detect either polarity magnet - simplifies mechanical design and magnet orientation |
| Chopper stabilization | Eliminates offset drift and 1/f noise - ensures stable Bop/Brp across temperature and time |
| Complementary outputs | Out1 (low-active) and Out2 (high-active) reduce BOM count by removing need for external inverter |
| RF noise immunity | Immune to GSM burst noise and common portable RF interference - no false triggers in cellular bands |
Applications
| Flip-Cover Detection | Sliding Mechanism Sensing |
|---|---|
Use Scenario: Detects open/closed state of clamshell phone lid using small neodymium magnet mounted on hinge. IC Role / Device Role / Timing Role: Hall switch providing latched digital state with hysteresis to prevent bounce during partial closure. Use Value: 15 µW total operation enables continuous monitoring without measurable battery drain. | Use Scenario: Monitors slider position in QWERTY smartphones to enable/disable keypad backlight and touch controller. IC Role / Device Role / Timing Role: Dual-output Hall sensor delivering synchronized high/low signals for direction-agnostic position decoding. Use Value: Complementary outputs eliminate need for external logic gate, reducing PCB area and component count. |
| Stylus Presence Detection | Wireless Headset Lid Switch |
Use Scenario: Confirms stylus insertion into PDA slot via magnet embedded in stylus tip. IC Role / Device Role / Timing Role: Ultra-sensitive switch triggering wake-up interrupt on microcontroller GPIO. Use Value: ±37 G typical operate point allows reliable detection with sub-2 mm air gap and minimal magnet size. | Use Scenario: Detects charging case lid closure in Bluetooth earbud systems to initiate charging sequence. IC Role / Device Role / Timing Role: Low-power Hall switch with fast 50–100 µs awake time enabling responsive lid-state reporting. Use Value: 5 µA disable current minimizes standby leakage when earbuds are stored and powered off. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Hall effect switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AL3320EUST-7 | Single-output (open-drain), 2.5–3.6 V range, 12 µA avg. current, ±40 G Bop | Lacks complementary outputs; requires external pull-up and inverter for dual-signal logic | Select when board space permits discrete logic and higher supply voltage is available |
| US5881LUA-AAA-KE3 | Unipolar, single-output, 2.7–24 V range, 3.5 mA Idd, 50 G Bop | Higher power, wider voltage, no hysteresis spec - unsuitable for ultra-low-power battery apps | Select only for industrial non-battery applications requiring wide-Vdd tolerance |
Compared with AL3320EUST-7 and US5881LUA-AAA-KE3, the AH1885-ZG-7 uniquely delivers micropower dual-output operation in 1.65–3.3 V range with guaranteed hysteresis and polarity insensitivity - critical for compact, long-life consumer portable designs.
Availability
AH1885-ZG-7 is available at Aetrix Electronics and suitable for flip-cover detection, sliding mechanism sensing, stylus presence detection, and wireless headset lid switch applications requiring stable component supply and RoHS-compliant green packaging.
Supply support for AH1885-ZG-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 analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
The AH1885-ZG-7 belongs to Diodes' Hall-effect sensor product line, engineered specifically for ultra-low-power, high-sensitivity position and proximity sensing in portable consumer electronics.
FAQ
What is the magnetic polarity requirement for AH1885-ZG-7 activation?
The AH1885-ZG-7 activates with either north or south pole magnetic fields applied to the branded side of the package. Its dual-Hall-plate architecture enables bipolar operation - no magnet orientation constraints - making it ideal for mechanically unconstrained flip-cover or slide mechanisms where magnet placement varies.
How does the complementary output configuration improve system design?
The AH1885-ZG-7 provides simultaneous Out1 (active-low) and Out2 (active-high) signals, eliminating the need for external inverters or logic gates. This reduces component count, PCB area, and signal propagation delay - especially valuable in space-constrained handheld devices where routing flexibility is limited and timing predictability matters.
Can AH1885-ZG-7 operate reliably at 1.65 V supply?
Yes - the AH1885-ZG-7 is fully specified down to 1.65 V, with tested performance including 7–12 µA average supply current, ±18 G minimum operate point, and functional hysteresis. It maintains stable switching behavior across the full −40°C to +85°C range at this minimum voltage, supporting single-cell lithium primary or rechargeable battery systems.
Is the NC pin (Pin 3) required to be grounded or left floating?
Pin 3 is a true no-connect terminal - internally unconnected and electrically isolated. Diodes Incorporated's recommended land pattern shows it as optional; it may be left floating or tied to GND for mechanical stability, but must never be connected to Vdd or any active signal. No electrical function is affected either way.
AH1885-ZG-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOT-553
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Omnipolar Switch
- Technology:
- Hall Effect
- Polarization:
- North Pole, South Pole
- Sensing Range:
- ±5.9mT Trip, ±1.5mT Release
- Test Condition:
- 25°C
- Voltage - Supply:
- 1.65V ~ 3.3V
- Current - Supply (Max):
- 12µA
- Current - Output (Max):
- -
- Output Type:
- Push-Pull
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-553
AH1885-ZG-7 FAQ
1.How can I place an order for AH1885-ZG-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AH1885-ZG-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 AH1885-ZG-7 reliable?
The price and inventory of AH1885-ZG-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AH1885-ZG-7 is usually 5 days.
3.What payment methods are accepted for AH1885-ZG-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH1885-ZG-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH1885-ZG-7?
AH1885-ZG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH1885-ZG-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 AH1885-ZG-7?
For technical support, including AH1885-ZG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH1885-ZG-7 requirements.
6.How does Aetrix verify that AH1885-ZG-7 is sourced from the original manufacturer or authorized distributors?
All AH1885-ZG-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 AH1885-ZG-7 meets industry standards.
7.What is the process for return or replacement of AH1885-ZG-7?
All AH1885-ZG-7 units undergo pre-shipment inspection (PSI). If there is an issue with AH1885-ZG-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 AH1885-ZG-7 part is unused and in its original packaging.
Return procedure for AH1885-ZG-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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