Diodes Incorporated AH1893-Z-7

Overview

AH1893-Z-7 from Diodes Incorporated is a high-sensitivity, micropower omnipolar Hall-effect switch IC in SOT553 package, operating from 1.6V to 3.6V with 4.3µA average supply current at 1.85V. It activates on either north or south magnetic pole, features internal pull-up/pull-down, chopper-stabilized architecture for thermal stability, and supports cover-detect and position-sensing in portable electronics.

For engineers reviewing the AH1893-Z-7 datasheet, AH1893-Z-7 pinout, AH1893-Z-7 application, or AH1893-Z-7 equivalent, key selection criteria include magnetic operate/release points (±16–42 Gauss), ultra-low power consumption, SOT553 footprint compatibility, and -40°C to +85°C industrial temperature range.

Technical Context

The AH1893-Z-7 implements a chopper-stabilized Hall sensor with hibernating clocking system, enabling stable switching thresholds across temperature and supply voltage variations. Its bipolar magnetic sensitivity (Bop ±16–42 G, Brp ±10–39 G) and 10 G typical hysteresis ensure reliable contactless actuation without polarity constraints.

Internal signal conditioning eliminates need for external pull-up resistors; output is open-drain with 0.2 V low-level voltage at 1 mA sink. The device enters ultra-low-power sleep mode between sampling cycles (Tperiod = 50–100 ms), achieving sub-5 µA average current at 1.85 V.

Key Specifications

Pinout & Package

Package: SOT553 - 1.6 mm × 1.6 mm × 0.6 mm low-profile surface-mount package with exposed pad for thermal relief.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar Hall-effect switch applications.

Compared with AL3320EUA-7 and TLE4913-2K, the AH1893-Z-7 uniquely balances ultra-low power (4.3 µA), omnipolar flexibility, and 1.6 V operation-making it optimal for space-constrained, battery-critical portable devices where magnet placement is non-directional.

Availability

AH1893-Z-7 is available at Aetrix Electronics and suitable for clamshell lid detection, cover presence sensing, display position switching, and contactless appliance control requiring stable component supply and long-term production continuity.

Supply support for AH1893-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 analog ICs, specializing in high-efficiency power management, signal integrity, and precision sensing solutions.

The AH1893 belongs to Diodes' Hall-effect switch product line, engineered specifically for ultra-low-power, contactless position and proximity detection in portable and battery-operated consumer electronics.

FAQ

What is the minimum magnetic field strength required to activate the AH1893-Z-7?

The AH1893-Z-7 activates at a minimum magnetic flux density of ±14 Gauss (Bop) over its full operating temperature range (-40°C to +85°C), with typical operation at ±30 Gauss at 25°C. This corresponds to standard NdFeB magnets placed within 2–4 mm of the package marking side, depending on magnet grade and orientation.

Does the AH1893-Z-7 require an external pull-up resistor?

No. The AH1893-Z-7 integrates internal pull-up and pull-down circuitry, eliminating the need for external resistors. Its open-drain OUTPUT pin can drive standard logic inputs directly when paired with a system-level pull-up, but no discrete resistor is required for basic functionality or noise immunity.

Can the AH1893-Z-7 operate from a 1.5 V alkaline battery?

Yes. With a specified minimum supply voltage of 1.6 V and tested down to 1.6 V across temperature, the AH1893-Z-7 functions reliably as the battery discharges from fresh 1.6 V to end-of-life ~1.6 V. Performance remains stable until VDD drops below 1.6 V, at which point output behavior is undefined.

How does the hibernating clocking system affect response time?

The hibernating clocking system samples the magnetic field every 50–100 ms, but once awakened, the device responds to magnetic transitions within 100 µs. This design ensures ultra-low average current while preserving fast edge detection-ideal for applications where event timing matters more than continuous monitoring.