Product Overview
The A3290 and A3291 are extremely temperature-stable and stress-resistant Hall-effect latches designed for operation over extended temperature ranges up to 125C. They feature dynamic offset cancellation for superior high-temperature performance, reducing residual offset voltage caused by overmolding, temperature dependencies, and thermal stress. These devices are not intended for automotive applications. They integrate a voltage regulator, Hall voltage generator, amplifier, chopper stabilization, Schmitt trigger, and a short-circuit protected open-drain output capable of sinking up to 25 mA. Operation requires a south polarity magnetic field to turn the output on and a north polarity field to turn it off. They support supply voltages from 3 to 24 V and are available in miniature SOT23W (LH) and ultramini SIP (UA) packages. Both packages are lead (Pb) free with 100% matte-tin leadframe plating.
Product Attributes
- Brand: Allegro MicroSystems
- Origin: USA
- Material: Silicon chip, Lead (Pb) free with 100% matte-tin leadframe plating
- Certifications: Not specified
Technical Specifications
| Part Number | Package Type | Packing | Magnetic Switchpoints (G) Operate, BOP | Magnetic Switchpoints (G) Release, BRP |
| A3290KLHLT-T | Surface-mount SOT23W | 3000 pieces per 7-in. reel | 5 to 50 | 50 to 5 |
| A3290KLHLX-T | Surface-mount SOT23W | 10000 pieces per 13-in. reel | 5 to 50 | 50 to 5 |
| A3290KUA-T | Through-hole ultramini SIP | 500 pieces per bulk bag | 5 to 50 | 50 to 5 |
| A3291KLHLT-T | Surface-mount SOT23W | 3000 pieces per 7-in. reel | 10 to 100 | 100 to 10 |
| A3291KLHLX-T | Surface-mount SOT23W | 10000 pieces per 13-in. reel | 10 to 100 | 100 to 10 |
| A3291KUA-T | Through-hole ultramini SIP | 500 pieces per bulk bag | 10 to 100 | 100 to 10 |
| Characteristic | Symbol | Test Conditions | Min. | Typ. | Max. | Units |
| Supply Voltage Range | VCC | Operating, TJ < 165C | 3.0 | 24 | V | |
| Output Leakage Current | IOFF | VOUT = 24 V, B < BRP | 10 | A | ||
| Output Saturation Voltage | VOUT(SAT) | IOUT = 20 mA, B > BOP | 185 | 500 | mV | |
| Output Current Limit | ION | B > BOP | 30 | 60 | mA | |
| Power-On Time | tPO | VCC > 3.0 V | 50 | s | ||
| Chopping Frequency | fC | 800 | kHz | |||
| Output Rise Time | tR | RLOAD = 820 , CLOAD = 20 pF | 0.2 | 2.0 | s | |
| Output Fall Time | tF | RLOAD = 820 , CLOAD = 20 pF | 0.1 | 2.0 | s | |
| Supply Current | ICC | B < BRP , VCC = 12 V | 3.0 | 8.0 | mA | |
| Supply Current | ICC | B > BOP , VCC = 12 V | 4.0 | 8.0 | mA | |
| Reverse Battery Current | IRCC | VRCC = 20 V | 5.0 | mA | ||
| Zener Voltage | VZ + VD | ICC = 15 mA, TA = 25C | 28 | V | ||
| Zener Impedance | ZZ + ZD | ICC = 15 mA, TA = 25C | 50 |
| Characteristic | Symbol | Test Conditions | Part Number | Min. | Max. | Units |
| Operate Point | BOP | TA = 25C and TA(max) | A3290 | 5 | 50 | G |
| Operate Point | BOP | TA = 40C | A3290 | 5 | 50 | G |
| Operate Point | BOP | TA = 25C and TA(max) | A3291 | 10 | 100 | G |
| Operate Point | BOP | TA = 40C | A3291 | 10 | 100 | G |
| Release Point | BRP | TA = 25C and TA(max) | A3290 | 50 | 5 | G |
| Release Point | BRP | TA = 40C | A3290 | 50 | 5 | G |
| Release Point | BRP | TA = 25C and TA(max) | A3291 | 100 | 10 | G |
| Release Point | BRP | TA = 40C | A3291 | 100 | 10 | G |
| Hysteresis | BHYS | TA = 25C and TA(max) | A3290 | 10 | 100 | G |
| Hysteresis | BHYS | TA = 40C | A3290 | 100 | G | |
| Hysteresis | BHYS | TA = 25C and TA(max) | A3291 | 20 | 200 | G |
| Hysteresis | BHYS | TA = 40C | A3291 | 200 | G |
2404151653_ALLEGRO-A3291KUA-T_C459248.pdf
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