Product Overview
The AH3712 is a high-voltage, high-sensitivity Hall-effect latch IC designed for commutation of brushless DC motors, flow meters, linear encoders, and position sensors in industrial and consumer home appliances and personal care applications. It operates over a 3.0V to 27V supply range and features a chopper-stabilized architecture with an internal bandgap regulator for temperature-compensated supply. The device offers an overcurrent limit on its single open-drain output, which switches on with a South pole and off with a North pole of sufficient strength. The output latches until the magnetic flux density reverses below the release point.
Product Attributes
- Brand: Diodes Incorporated
- Origin: Not specified
- Material: Totally Lead-Free & Fully RoHS Compliant, Halogen and Antimony Free (Green Device)
- Certifications: RoHS, RoHS 2, RoHS 3
- Available Variants: AH3712, AH3712A, AH3712B, AH3712Q (automotive-compliant)
- Packages: SC59, SOT23 (Type S), SIP-3
Technical Specifications
| Parameter | AH3712 / AH3712A | AH3712B | Conditions | Unit |
|---|---|---|---|---|
| Supply Voltage (VDD) | 3.0 to 27 | Recommended Operating | V | |
| Load Dump Voltage | Up to 40 | Absolute Maximum (Transient) | V | |
| High Sensitivity (Typical BOP/BRP) | 25 | G | ||
| Output Polarity | Direct | Inverted | ||
| Output Type | Open-Drain | Open-Drain | ||
| Internal Pull-Up Resistor (RPU) | Not Applicable | Not Applicable | k | |
| Output On Voltage (VOUT_ON) | 0.25 0.42 | IOUT = 20mA | V | |
| Output Leakage Current (IOUT_OFF) | <0.1 10 | VOUT = 27V, Output off | A | |
| Supply Current (IDD) | 2.8 3.8 (Output off, TA = +25C) 2.8 4.8 (Output off, TA = -40C to +125C) | mA | ||
| Reverse Battery Current (IDD_R) | 0.001 1.2 | VDD = -18V, TA = -40C to +125C (AH3712/AH3712B Only) | mA | |
| Device Start-Up Time (tST) | 13 | VDD >= 3V | s | |
| Chopping Frequency (fc) | 500 | VDD >= 3V | kHz | |
| Output Rising Time (tr) | 0.1 1 | RL = 1k, CL = 20pF | s | |
| Output Falling Time (tf) | 0.3 1 | RL = 1k, CL = 20pF | s | |
| Output Current Limit (IOCL) | 30 60 | Output on | mA | |
| Operating Temperature Range | -40 to +125 | C | ||
| ESD HBM | 8 | kV | ||
| ESD CDM | 1 | kV | ||
| BOP (Operation Point) | 10 25 40 | Gauss | ||
| BRP (Release Point) | -40 -25 -10 | Gauss | ||
| BHY (Hysteresis) | 20 50 80 | Gauss | ||
2401221705_DIODES-AH3712-SA-7_C19948383.pdf
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