Diodes Incorporated AH1912-W-EVM

Overview

AH1912-W-EVM from Diodes Incorporated is an evaluation module for the AH1912 ultra-low power digital omnipolar Hall-effect switch IC, designed to validate magnetic sensing behavior in battery-constrained systems. It supports SC59 package testing, operates from 1.6V to 5.5V, draws only 1.6μA average supply current at 3V, and responds to either north or south magnetic poles with BOP ±21–39 Gauss and BRP ±14–30 Gauss.

For engineers reviewing the AH1912 datasheet, AH1912 pinout, AH1912 application, or AH1912 equivalent, this EVM enables rapid prototyping of proximity, cover-detect, and utility metering functions while verifying wake-up timing (45μs), hysteresis (2–7 Gauss), and RF noise immunity in real PCB environments.

Technical Context

The AH1912-W-EVM implements a chopper-stabilized Hall sensor architecture with hibernating clocking logic that cycles between 45μs active sampling and 45ms sleep intervals, achieving 1.6μA average current. Its latch-based output driver delivers rail-to-rail switching with VOL = 0.2V @ 0.1mA sink and VOH = VDD−0.1V @ −0.1mA source.

It interfaces directly with low-voltage microcontrollers (1.6V min), requires no external pull-up resistor, and incorporates internal offset cancellation to maintain ±3 Gauss thermal drift over −40°C to +85°C. The module includes a 100nF ceramic decoupling capacitor placed adjacent to VDD per datasheet recommendation.

Key Specifications

Availability

AH1912-W-EVM is available at Aetrix Electronics and suitable for smart cover detection, remote utility metering, smoke detector status monitoring, and IoT edge node sensing requiring stable component supply and fast design validation.

Supply support for AH1912-W-EVM 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 centers across Asia and manufacturing in China, Taiwan, and Malaysia.

The AH1912-W-EVM belongs to Diodes' Hall-effect sensor evaluation platform family, engineered specifically to accelerate qualification of ultra-low-power magnetic switches in battery-operated consumer and industrial endpoints.

FAQ

What is the purpose of the AH1912-W-EVM?

The AH1912-W-EVM is a dedicated evaluation module for the AH1912 SC59-packaged Hall-effect switch. It provides a ready-to-use PCB with correct decoupling, test points, and footprint alignment to verify magnetic actuation thresholds, timing behavior, and system-level integration - eliminating custom layout risk during early development.

Does the EVM support both SC59 and X1-DFN1216-4 packages?

No. The AH1912-W-EVM is configured exclusively for the SC59 package (indicated by "-W" in the part number). It does not accommodate the X1-DFN1216-4 variant (FA suffix); that device requires a separate evaluation board with matching land pattern and thermal pad layout.

Can the EVM operate from a 1.6V supply?

Yes. The AH1912-W-EVM fully supports the AH1912's rated 1.6V–5.5V input range. At 1.6V, the device maintains functional operation with verified BOP/BRP performance and 3μA maximum average current, enabling compatibility with single-cell alkaline or lithium primary batteries.

Is an external pull-up resistor required on the OUTPUT pin?

No. The AH1912-W-EVM leverages the AH1912's internal output structure: it features an open-drain output with no internal pull-up, but the EVM itself does not include one - users must add an external pull-up (typically 10kΩ) to their host system's logic rail to establish valid high-state voltage levels.