The A3425 is a dual-output-channel, bipolar switch with each channel comprising a separate complete Hall-effect sensor circuit with dedicated Hall element and separate digital output for speed and direction signal processing capability. The A3425 is a highly sensitive, temperature-stable magnetic sensing device, which is ideal for use in ring magnet-based speed and direction systems used in harsh automotive and industrial environments.
The A3425 Hall‑effect bipolar switch provides two matched Hall sensors on a single substrate, delivering quadrature outputs 90° out of phase for speed and direction detection. It features integrated ESD diodes, high‑sensitivity switch points, and robust EMC protection, making it suitable for harsh automotive and industrial environments.
The device is offered in 8‑pin SOIC (suffix L) and 4‑pin SIP (suffix K) packages, supports supply voltages from 3.3 V to 18 V, and operates over a wide temperature range. Detailed electrical, magnetic, and thermal specifications are provided for design integration.
| Supply Voltage (VCC) | up to 26.5 V |
|---|---|
| Reverse Battery Voltage | -16 V |
| Operating Ambient Temperature (L package) | -40 °C to 150 °C |
| Output Sink Current (continuous) | 20 mA |
| Package Types | 8‑pin SOIC (suffix L) and 4‑pin SIP (suffix K) |
| Hall Element Spacing | approximately 1 mm |
| Supply Voltage Operating Range (typical) | 3.3 V to 18 V |
The device operates from 3.3 V up to 18 V, with an absolute maximum rating of 26.5 V.
It is offered in an 8‑pin SOIC (suffix L) surface‑mount package and a 4‑pin SIP (suffix K) through‑hole package.
The continuous output sink current is rated at 20 mA.