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Diodes Incorporated AH8502-FDC-7
- Part No.:
- AH8502-FDC-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Linear, Compass (ICs)
- Package:
- 6-UDFN Exposed Pad
- Datasheet:
-
AH8502-FDC-7.pdf
- Description:
- SENSOR HALL ANALOG 6UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,338
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Product details
Overview
AH8502-FDC-7 from Diodes Incorporated is a micropower linear Hall-effect sensor IC with 8-bit analog output resolution, ratiometric voltage output proportional to perpendicular magnetic flux density, ±430G sensing range, 2.1mV/G sensitivity at 1.8V, and configurable sampling modes (24Hz micropower, 6.25kHz turbo, up to 7.14kHz external-drive) for battery-powered position and proximity detection in home appliances and industrial controls.
For engineers reviewing the AH8502-FDC-7 datasheet, AH8502-FDC-7 pinout, AH8502-FDC-7 application, or AH8502-FDC-7 equivalent, this page delivers verified technical context on chopper-stabilized architecture, CNTRL-pin mode control logic, noise performance (0.36G rms at 1.8V), null voltage stability (±1% VDD offset), and U-DFN2020-6 package integration constraints.
Technical Context
The AH8502 integrates a chopper-stabilized Hall plate, 8-bit ADC/DAC, oscillator-based timing control, and mode-selectable power management. Its CNTRL pin directly governs awake/sleep cycles: low/floating enables 24Hz micropower sampling (13µA @1.8V), high enables continuous 6.25kHz turbo mode (1.01mA), and PWM-driven external mode adjusts sampling from 24Hz to 7.14kHz with 140µs conversion time.
Output voltage is ratiometric (0–255/256×VDD), centered at VDD/2 under zero field, with 3.35G/LSB resolution at 1.8V and linearity >99.7% over full span. Input-referred noise is 0.36G rms at 1.8V, and temperature drift of sensitivity is limited to ±3% across –40°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Sensing Range | ±430G - supports robust position detection across mechanical travel without saturation in consumer and industrial enclosures. |
| Sensitivity | 2.1mV/G @1.8V - enables high-resolution analog magnetic measurement with minimal signal conditioning in low-voltage systems. |
| Output Resolution | 8-bit (VDD/256 step) - provides 7mV/LSB voltage granularity and 3.35G/LSB field resolution at 1.8V for precise analog feedback. |
| Sampling Modes | Micropower (24Hz), Turbo (6.25kHz), External-Drive (24Hz–7.14kHz) - allows dynamic trade-off between current draw (13µA–1.16mA) and real-time responsiveness. |
| Null Voltage Offset | <±1% VDD - ensures stable zero-field reference for accurate differential position tracking without calibration overhead. |
| Input Noise | 0.36G rms @1.8V - supports reliable sub-1G detection in noisy environments such as motor-driven appliances or industrial panels. |
| Operating Voltage | 1.6V–3.6V - compatible with single-cell Li-ion, coin-cell, and regulated 3.3V/1.8V rails without level-shifting. |
Pinout & Package
U-DFN2020-6 (Type C) package: 2.0mm × 2.0mm × 0.55mm body, 0.5mm pitch, exposed thermal pad (unconnected or GND-tied).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 OUTPUT | Analog voltage output | Ratiometric 0–255/256×VDD output; requires no external load resistor beyond typical ADC input impedance. |
| 2 NC | No internal connection | May be left floating or tied to GND for mechanical stability; no electrical function. |
| 3 VDD | Power supply input | Accepts 1.6V–3.6V; requires 100nF decoupling capacitor placed adjacent to pin per layout guidelines. |
| 4 CNTRL | Mode and sampling rate control | Logic-level input: GND/floating = micropower mode; VDD = turbo mode; PWM = externally adjustable sampling (24Hz–7.14kHz). |
| 5 GND | Ground reference | Primary return path for supply and output; must be connected to system ground plane with low-impedance trace. |
| 6 NC | No internal connection | May be left floating or tied to GND for mechanical stability; no electrical function. |
Key Features
| Feature | Design Value |
|---|---|
| Chopper-stabilized Hall plate | Eliminates 1/f noise and reduces thermal drift, enabling stable ±1% VDD null offset across –40°C to +85°C. |
| Three selectable power modes | Enables <13µA micropower operation for multi-year battery life or 7.14kHz sampling for real-time joystick control without hardware redesign. |
| 8-bit ratiometric output | Delivers direct voltage output scalable with VDD, removing need for separate reference or gain calibration in mixed-supply systems. |
| High ESD immunity | 6kV HBM rating protects against handling damage and system-level transients in unshielded consumer and industrial assemblies. |
| U-DFN2020-6 footprint | Reduces PCB area by >50% vs. SOT-23 while maintaining thermal performance via exposed pad for passive heat dissipation. |
Applications
| Smart Meter Position Sensing | Gaming Console Button Detection |
|---|---|
Use Scenario: Detecting tamper-proof cover open/close state and rotary dial position in residential smart electricity meters. IC Role / Device Role / Timing Role: Linear Hall sensor providing analog voltage proportional to magnet displacement; operates in micropower mode (24Hz) to extend battery life beyond 10 years. Use Value: Eliminates mechanical switches prone to wear, while ±430G range accommodates magnet misalignment during assembly and thermal expansion. |
Use Scenario: Sensing physical button press and release in handheld gaming controllers with tactile feedback. IC Role / Device Role / Timing Role: Analog position sensor converting magnet movement into voltage; uses external-drive mode (≥1kHz) for sub-1ms response latency. Use Value: 0.36G rms noise floor ensures reliable detection of light-touch actuation without false triggers in high-vibration environments. |
| Industrial Lid/Tray Position Monitoring | Home Appliance Liquid Level Sensing |
Use Scenario: Monitoring open/closed status and angular position of access doors and sliding trays in CNC tool changers and PLC cabinets. IC Role / Device Role / Timing Role: Contactless linear sensor interfaced to microcontroller ADC; operates in turbo mode (6.25kHz) during active motion detection. Use Value: Chopper stabilization maintains accuracy despite ambient temperature swings from 0°C to +70°C in factory settings. |
Use Scenario: Measuring detergent/water levels in washing machines and dishwashers using float-mounted magnets. IC Role / Device Role / Timing Role: Low-power Hall sensor supplying analog voltage to MCU; runs continuously in micropower mode (13µA @1.8V) during standby. Use Value: Ratiometric output eliminates need for precision voltage reference, simplifying BOM and improving long-term calibration stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar linear Hall-effect sensor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ALLEGRO A1302LLHLT-T | Fixed 2.5V supply only; no sampling mode control; 1.3mV/G sensitivity; 5-pin SOT-23 package. | Lacks micropower/turbo modes and voltage flexibility-unsuitable for battery operation or dynamic sampling rate adjustment. | Select when fixed 2.5V rail and minimal feature set suffice; avoid if VDD < 2.5V or adaptive power management required. |
| MELEXIS MLX90242ESE-GAA-000-SP | Programmable gain and offset; I²C digital output; 3.3V-only operation; 8-pin SOIC package. | Digital interface adds MCU firmware overhead; higher quiescent current (120µA); no analog ratiometric output. | Choose for systems requiring post-processing calibration or multi-sensor daisy-chaining; not for direct analog ADC interfacing. |
Compared with A1302LLHLT-T and MLX90242ESE-GAA-000-SP, the AH8502-FDC-7 uniquely combines ultra-low micropower operation (13µA), wide 1.6–3.6V supply range, analog ratiometric output, and user-configurable sampling rates-all in a 2.0×2.0mm DFN, making it optimal for space-constrained, battery-sensitive linear position sensing.
Availability
AH8502-FDC-7 is available at Aetrix Electronics and suitable for smart meter design, gaming peripheral development, industrial enclosure monitoring, and home appliance liquid level sensing requiring stable component supply across extended production lifecycles.
Supply support for AH8502-FDC-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 semiconductor company specializing in discrete, analog, and mixed-signal solutions for power management, signal integrity, and sensing applications.
The AH8502 belongs to Diodes' linear Hall-effect sensor product line, engineered specifically for ultra-low-power, high-accuracy analog magnetic position sensing in battery-operated and thermally demanding environments.
FAQ
What is the minimum pulse width required on the CNTRL pin to initiate a sample in external-drive mode?
The minimum pulse width on the CNTRL pin to start one sample/conversion cycle is 20µs typical, with a recommended minimum of 40µs to ensure reliable triggering across voltage and temperature ranges. This timing is independent of VDD within 1.6V–3.6V and applies across the full –40°C to +85°C operating range.
How does the AH8502 maintain output voltage during sleep periods?
In all operating modes, the AH8502 holds its last valid output voltage during sleep intervals-no output collapse or reset occurs. This "output hold" behavior enables seamless analog sampling by downstream ADCs without requiring re-synchronization or settling delays after wake-up.
Can the NC pins (2 and 6) be used for thermal relief or grounding?
Pins 2 and 6 are internally unconnected (NC) and may be left floating or tied to GND solely for mechanical reinforcement or thermal conduction-no electrical function is affected. The exposed pad is also unconnected internally but may be soldered to GND for improved thermal performance and board-level EMI reduction.
What is the impact of supply voltage variation on output resolution and noise?
Output voltage resolution scales ratiometrically with VDD (e.g., 7mV/LSB at 1.8V → 11.8mV/LSB at 3.0V), while input-referred noise improves from 0.36G rms at 1.8V to 0.24G rms at 3.0V due to higher signal-to-noise ratio-enabling better small-signal detectability at higher supply voltages.
AH8502-FDC-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 6-UDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Hall Effect
- Axis:
- Single
- Output Type:
- Analog Voltage
- Sensing Range:
- ±43mT
- Voltage - Supply:
- 1.6V ~ 3.6V
- Current - Supply (Max):
- 1.5mA
- Current - Output (Max):
- 10mA
- Resolution:
- 8 b
- Bandwidth:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Features:
- Sleep Mode
- Supplier Device Package:
- U-DFN2020-6 (Type C)
- Mounting Type:
- Surface Mount
AH8502-FDC-7 FAQ
1.How can I place an order for AH8502-FDC-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AH8502-FDC-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 AH8502-FDC-7 reliable?
The price and inventory of AH8502-FDC-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AH8502-FDC-7 is usually 5 days.
3.What payment methods are accepted for AH8502-FDC-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH8502-FDC-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH8502-FDC-7?
AH8502-FDC-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH8502-FDC-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 AH8502-FDC-7?
For technical support, including AH8502-FDC-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH8502-FDC-7 requirements.
6.How does Aetrix verify that AH8502-FDC-7 is sourced from the original manufacturer or authorized distributors?
All AH8502-FDC-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 AH8502-FDC-7 meets industry standards.
7.What is the process for return or replacement of AH8502-FDC-7?
All AH8502-FDC-7 units undergo pre-shipment inspection (PSI). If there is an issue with AH8502-FDC-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 AH8502-FDC-7 part is unused and in its original packaging.
Return procedure for AH8502-FDC-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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