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Diodes Incorporated AH1888-FJRG-7
- Part No.:
- AH1888-FJRG-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- 3-UDFN
- Datasheet:
-
AH1888-FJRG-7.pdf
- Description:
- MAGNETIC SWITCH OMNIPOLAR 3DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,568
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Product details
Overview
AH1888-FJRG-7 from Diodes Incorporated is a micropower, omni-polar Hall effect switch IC with active-high output (Output 2), designed for battery-powered consumer electronics. It operates from 1.65V to 3.3V, consumes only 7–12µA average supply current at 1.8V, features ±61–79 Gauss operate points, and uses U-DFN2020R-3 package for space-constrained PCB layouts in portable devices.
For engineers reviewing the AH1888-FJRG-7 datasheet, AH1888-FJRG-7 pinout, AH1888-FJRG-7 application, or AH1888-FJRG-7 equivalent, key selection criteria include its dual-output variant identity (Output 2 only), chopper-stabilized magnetic sensitivity, ultra-low power consumption, and U-DFN2020R-3 thermal and footprint characteristics for compact sensor integration.
Technical Context
The AH1888-FJRG-7 implements a chopper-stabilized architecture with two Hall plates to suppress offset drift and deliver stable switching across temperature (−40°C to +85°C). Its omni-polar detection enables activation by either north or south magnetic poles, eliminating orientation dependency during assembly.
It integrates internal sleep/awake logic that limits average current to ≤12µA while maintaining 50–100µs wake-up time and 50–100ms sampling period. Output 2 is active-high with VOH ≥ Vdd − 0.2V at −0.5mA load, and the device provides hysteresis of 3–8 Gauss to prevent chatter near threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 1.65V to 3.3V - supports single-cell Li-ion and coin-cell battery systems without regulation |
| Average Supply Current | 7–12µA at 1.8V - enables multi-year operation in always-on proximity sensing |
| Operate Point (Bop) | ±61–79 Gauss - detects weak magnets at >3mm air gap in consumer enclosures |
| Hysteresis (Bhy) | 3–8 Gauss - prevents false toggling during slow or noisy magnetic transitions |
| Output Type | Active-high (Output 2) - directly interfaces with CMOS logic without external pull-up |
| ESD Rating | >5kV HBM - withstands handling in high-volume portable device assembly lines |
| Operating Temp | −40°C to +85°C - qualified for interior smartphone and wearable environments |
Pinout & Package
Package: U-DFN2020R-3 (2.0mm × 2.0mm × 0.55mm, 3-pin, exposed pad, RoHS-compliant "Green" construction).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1. Vdd | Power input | Supplies internal regulator and Hall amplifiers; must be decoupled within 2mm of pin |
| 2. Output 2 | Digital output | Active-high open-drain compatible output; sinks up to 0.5mA, VOH ≥ Vdd − 0.2V |
| 3. GND | Reference ground | Common return for Hall plates, logic, and output driver; connects to thermal pad for dissipation |
Key Features
| Feature | Design Value |
|---|---|
| Omni-polar magnetic sensing | Activates with either N- or S-pole - eliminates magnet polarity alignment during manufacturing |
| Chopper stabilization | Reduces Bop drift to <±10% over −40°C to +85°C - ensures consistent trip points across operating life |
| Internal power management | Auto-sleep mode reduces Idd(avg) to 7–12µA - extends battery life in intermittent-sense applications |
| U-DFN2020R-3 footprint | 2.0mm × 2.0mm body with 0.5mm pitch - fits under display bezels and camera modules |
| Halogen/antimony-free | Meets EU RoHS 2 (2011/65/EU) - supports global environmental compliance without performance trade-offs |
Applications
| Smartphone Flip Cover Detection | Wireless Headset Lid Sensing |
|---|---|
Use Scenario: Detects magnet position when clamshell cover closes or opens on Android/iOS smartphones. IC Role / Device Role / Timing Role: Hall switch providing digital lid-state signal to baseband processor via GPIO. Use Value: Enables automatic screen on/off with <12µA quiescent draw - preserves standby battery for >30 days. | Use Scenario: Monitors charging case lid closure to initiate Bluetooth pairing or battery status reporting. IC Role / Device Role / Timing Role: Active-high Output 2 triggers MCU wake-up on lid-open event with 50–100µs latency. Use Value: Eliminates mechanical switches; U-DFN2020R-3 fits inside 8mm-thick earbud case walls. |
| Portable PC Tablet Mode Switch | Smart Remote Power-On Trigger |
Use Scenario: Detects keyboard detachment in 2-in-1 laptops to auto-switch between laptop and tablet UI modes. IC Role / Device Role / Timing Role: Omni-polar switch signals hinge state to EC firmware; no magnet orientation calibration needed. Use Value: ±61–79 Gauss Bop tolerates magnet placement variance across 100K-unit production batches. | Use Scenario: Activates IR/Bluetooth remote when removed from cradle or dock using embedded magnet. IC Role / Device Role / Timing Role: Output 2 drives enable line of RF transceiver; low-power sleep maintains responsiveness. Use Value: 1.65–3.3V operation matches AAA/coin-cell voltage sag profile without LDO overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Hall effect switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AL3320E-30F | Single-output, active-low; 2.7–5.5V supply; 3.5µA typical Idd | Requires external pull-up; wider Vdd range but higher minimum voltage | Select if system uses 3.3V+ rails and prefers active-low logic interface |
| TMAG5170AHQDBVR | 3-axis linear Hall sensor with SPI interface; 3.3V only; 1.5mA active current | Provides analog field strength data, not digital switch output | Select only if directional sensing or field magnitude measurement is required |
Compared with AL3320E-30F and TMAG5170AHQDBVR, the AH1888-FJRG-7 uniquely delivers ultra-low-power omni-polar switching in a 2mm² footprint with native active-high output-making it optimal for space- and energy-constrained consumer lid/cover detection where digital on/off signaling suffices.
Availability
AH1888-FJRG-7 is available at Aetrix Electronics and suitable for smartphone flip detection, wireless headset lid sensing, and portable PC tablet-mode switching requiring stable component supply and RoHS-compliant packaging.
Supply support for AH1888-FJRG-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, headquartered in Plano, Texas, serving automotive, industrial, computing, and consumer markets since 1959.
The AH1888 belongs to Diodes' Hall-effect switch product line, engineered specifically for micropower, omni-polar magnetic sensing in portable electronics - prioritizing battery life, small form factor, and production robustness over programmability or analog output.
FAQ
What distinguishes AH1888-FJRG-7 from AH1888-FJG-7?
AH1888-FJRG-7 provides Output 2 (active-high), whereas AH1888-FJG-7 provides Output 1 (active-low). Both share identical magnetic thresholds, supply range, and package (U-DFN2020-3 vs. U-DFN2020R-3 differ only in pin 2 assignment: Output 1 vs. Output 2). Pin 2 function is fixed per suffix and cannot be reconfigured.
Does AH1888-FJRG-7 require an external pull-up resistor?
No. The AH1888-FJRG-7 Output 2 is push-pull capable and drives high to ≥Vdd − 0.2V at −0.5mA load. An external pull-up is unnecessary unless interfacing with legacy 5V logic; in 1.8V/3.3V systems, direct connection to MCU GPIO is standard.
Can AH1888-FJRG-7 operate reliably at 1.65V supply?
Yes. The datasheet specifies guaranteed operation down to 1.65V across −40°C to +85°C. At this voltage, Bop remains within ±79 Gauss, Idd(avg) stays ≤12µA, and VOH meets ≥Vdd − 0.2V - validated in production testing per DS31565 Rev. 8-2.
Is the U-DFN2020R-3 package thermally enhanced compared to SOT553?
Yes. U-DFN2020R-3 includes an exposed thermal pad that lowers junction-to-board thermal resistance by ~30% versus SOT553. This allows sustained operation at 85°C ambient with full magnetic specification retention, critical for sealed smartphone chassis with limited airflow.
AH1888-FJRG-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 3-UDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Omnipolar Switch
- Technology:
- Hall Effect
- Polarization:
- North Pole, South Pole
- Sensing Range:
- ±7.9mT Trip, ±3.5mT 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:
- DFN2020-3
AH1888-FJRG-7 FAQ
1.How can I place an order for AH1888-FJRG-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AH1888-FJRG-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 AH1888-FJRG-7 reliable?
The price and inventory of AH1888-FJRG-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AH1888-FJRG-7 is usually 5 days.
3.What payment methods are accepted for AH1888-FJRG-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH1888-FJRG-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH1888-FJRG-7?
AH1888-FJRG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH1888-FJRG-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 AH1888-FJRG-7?
For technical support, including AH1888-FJRG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH1888-FJRG-7 requirements.
6.How does Aetrix verify that AH1888-FJRG-7 is sourced from the original manufacturer or authorized distributors?
All AH1888-FJRG-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 AH1888-FJRG-7 meets industry standards.
7.What is the process for return or replacement of AH1888-FJRG-7?
All AH1888-FJRG-7 units undergo pre-shipment inspection (PSI). If there is an issue with AH1888-FJRG-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 AH1888-FJRG-7 part is unused and in its original packaging.
Return procedure for AH1888-FJRG-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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