hall effect latch ic diodes ah3781 sa 7 with wide temperature range and output overcurrent protection
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Product Description
Product Overview
The AH3781 is a high-voltage, high-sensitivity Hall Effect latch IC with an internal pull-up resistor. It is designed for applications such as brushless DC motor commutation, flow meters, linear encoders, and position sensors in industrial, consumer home appliance, and personal care sectors. The device operates over a wide supply range of 3.0V to 28V and features chopper stabilization for temperature stability and minimal switch point drift. It offers robustness with Zener clamps on the supply and output, an output overcurrent limit, and is available in SOT23 and SIP-3 packages.
Product Attributes
- Brand: Diodes Incorporated
- Product Number: AH3781
- Document Number: DS37903 Rev. 1 - 2
- Certifications: Totally Lead-Free & Fully RoHS Compliant, Halogen and Antimony Free (Green Device)
Technical Specifications
| Characteristic | Symbol | Value | Unit | Conditions |
| Supply Voltage | VDD | 3.0 to 28 | V | Operating |
| Operating Temperature Range | TA | -40 to +125 | C | Operating |
| Output On Voltage | VOUT_ON | - to 0.4 | V | IOUT = 20mA, B > BOP |
| Output Leakage Current | IOUT_OFF | <0.1 to 15 | A | VOUT = 28V, B < BRP, Output off |
| Supply Current | IDD | - to 5.8 | mA | Output open, TA = -40C to +125C |
| Internal Pull-Up Resistance | RPU | 10 to 18 | k | TA = -40C to +125C |
| Device Start-Up Time | tST | - to 10 | s | VDD >= 3V, B > BOP |
| Chopping Frequency | fc | - to 800 | kHz | VDD = 3V to 28V |
| Time Delay (Magnetic Threshold to Output) | td | - to 3.75 | s | Guaranteed by design |
| Output Rising Time | tr | - to 1 | s | RL =1k, CL = 20pF |
| Output Falling Time | tf | - to 1 | s | RL =1k, CL = 20pF |
| Output Current Limit | IOCL | 30 to 55 | mA | B > BOP |
| Zener Clamp Voltage | VZ | 28 | V | IDD = 5mA |
| Operation Point (South pole) | BOP | 10 to 40 | Gauss | TA = -40C to +125C |
| Release Point (North pole) | BRP | -40 to -10 | Gauss | TA = -40C to +125C |
| Hysteresis | BHY | 20 to 80 | Gauss | TA = -40C to +125C |
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