Diodes Incorporated AH1913-FA-7

Overview

AH1913-FA-7 from Diodes Incorporated is an ultra-high sensitivity digital omnipolar Hall-effect switch IC in X1-DFN1216-4 package, operating from 1.6V to 5.5V supply, with 12μA average current at 1.8V, ±9–27 Gauss operate points, and 6kV HBM ESD rating. It functions as a contactless magnetic position detector in battery-powered IoT sensors, smart covers, and smoke detectors.

For engineers reviewing the AH1913-FA-7 datasheet, AH1913-FA-7 pinout, AH1913-FA-7 application, or AH1913-FA-7 equivalent, key selection criteria include magnetic sensitivity (BOP/BRP), micropower sleep mode current (12μA avg), omnidirectional pole response, chopper-stabilized temperature stability, and DFN1216-4 footprint compatibility with space-constrained PCB layouts.

Technical Context

The AH1913 employs a chopper-stabilized Hall plate and offset cancellation architecture to suppress drift across –40°C to +85°C and 1.6V–5.5V supply range, delivering stable BOP/BRP thresholds with ≤7G hysteresis. Its hibernating clocking system cycles between awake (45μs) and sleep (2.8ms typical period) states to achieve ultralow average current.

Output is open-drain, actively pulled low when |B| exceeds BOP (±9–27 G), and released only when |B| falls below BRP (±3–20 G); NC pin on X1-DFN1216-4 is unconnected and may be left floating or grounded without functional impact.

Key Specifications

Pinout & Package

Package: X1-DFN1216-4 (1.2 × 1.6 mm, 0.5 mm height, wettable flank), lead-free and RoHS 3 compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with A3212LLHLT-T and US5881LUA-ABA-000-REEL, AH1913-FA-7 uniquely balances ultra-low 12μA average current, true omnipolar operation, and 1.2×1.6mm DFN footprint - making it optimal for space- and power-constrained consumer IoT endpoints where magnet placement flexibility matters.

Availability

AH1913-FA-7 is available at Aetrix Electronics and suitable for smart cover detection, smoke detector tamper sensing, digital camera lens positioning, and IoT smart lock actuator feedback requiring stable component supply and long-lifecycle support.

Supply support for AH1913-FA-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 centers across Asia and manufacturing in China, Taiwan, and the U.S.

The AH1913 belongs to Diodes' broad Hall-effect switch family, engineered specifically for ultra-low-power, contactless position sensing in battery-operated consumer and industrial edge devices.

FAQ

What is the function of the NC pin on AH1913-FA-7?

Pin 3 on the X1-DFN1216-4 package is designated NC (No Connection) and has no internal electrical connection. It may be left unconnected or tied to GND to enhance solder joint mechanical strength and thermal dissipation without affecting device operation or magnetic performance.

Does AH1913-FA-7 require an external pull-up resistor on the OUTPUT pin?

Yes - the OUTPUT pin is open-drain and must be pulled up externally to a voltage between 1.6V and 5.5V. A 10kΩ resistor to VDD is typical; value may be adjusted based on rise-time requirements and bus capacitance, but must ensure VOL ≤ 0.25V at 0.1mA sink current.

How does the hibernating clocking system reduce power consumption?

The hibernating clocking system alternates between brief awake periods (45μs) for magnetic sampling and extended sleep intervals (2.8ms typical), reducing average current to 12μA at 1.8V. This duty-cycled operation eliminates continuous bias current while maintaining responsive detection latency.

Can AH1913-FA-7 operate reliably at 1.6V supply voltage?

Yes - AH1913-FA-7 is fully specified down to 1.6V, with guaranteed BOP/BRP thresholds, 12μA average current, and 45μs awake time across the full –40°C to +85°C range. It interfaces directly with 1.8V microcontrollers and remains functional even as primary battery voltage declines to endpoint.