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Specifications
Voltage - Supply:
2.5V~3.5V
Mfr. Part #:
A3212EUA-T
Package:
SIP-3
Key Attributes
Model Number:
A3212EUA-T
Product Description
Product Overview
The A3211 and A3212 are ultrasensitive, pole-independent Hall-effect switches with latched digital output, designed for low-power applications. They operate from 2.5 to 3.5 V, significantly reducing power consumption to less than 15 W. These devices are ideal for battery-operated, hand-held equipment like cellular phones, pagers, and palmtop computers, offering superior reliability and ease of manufacturing compared to reed switches. Chopper stabilization ensures improved stability by reducing offset voltage caused by overmolding, temperature, and thermal stress.
Product Attributes
- Brand: Allegro MicroSystems
- Certifications: AEC-Q100 automotive qualified (for some variants)
- Material: Advanced CMOS processing
- Packages: DFN (EH, EL), SOT23W (LH), SIP (UA)
- Lead Finish: 100% matte-tin-plated leadframes (Pb-free)
Technical Specifications
| Part Number | Package | Ambient Temperature (C) | State in Magnetic Field | Packing | Notes |
|---|---|---|---|---|---|
| A3211EEHLTT | DFN (2 mm 3 mm, 0.75 mm) | 40 to 85 | Off | 3000 pieces per reel | Variant no longer in production. Not for new design. |
| A3211EELLTT | DFN (2 mm 2 mm, 0.50 mm) | 40 to 85 | Off | 3000 pieces per reel | Variant in production, LAST TIME BUY. Restricted to existing applications. |
| A3211ELHLTT | SOT23W (3-pin SMD) | 40 to 85 | Off | 3000 pieces per reel | |
| A3211ELHLXT | SOT23W (3-pin SMD) | 40 to 85 | Off | 10000 pieces per 13-in. reel | |
| A3212EEHLTT | DFN (2 mm 3 mm, 0.75 mm) | 40 to 85 | On | 3000 pieces per reel | Variant no longer in production. Not for new design. |
| A3212EELLTT | DFN (2 mm 2 mm, 0.50 mm) | 40 to 85 | On | 3000 pieces per reel | Variant in production, LAST TIME BUY. Restricted to existing applications. |
| A3212ELHLTT | SOT23W (3-pin SMD) | 40 to 85 | On | 3000 pieces per reel | |
| A3212ELHLXT | SOT23W (3-pin SMD) | 40 to 85 | On | 10000 pieces per 13-in. reel | |
| A3212EUAT | SIP-3 (through hole) | 40 to 85 | On | 500 pieces per bulk bag | |
| A3212LLHLTT | SOT23W (3-pin SMD) | 40 to 150 | On | 3000 pieces per reel | |
| A3212LLHLXT | SOT23W (3-pin SMD) | 40 to 150 | On | 10000 pieces per 13-in. reel | |
| A3212LUAT | SIP-3 (through hole) | 40 to 150 | On | 500 pieces per bulk bag |
| Characteristic | Symbol | Test Conditions | Min. | Typ.* | Max. | Units |
|---|---|---|---|---|---|---|
| Supply Voltage Range | VDD | Operating | 2.5 | 2.75 | 3.5 | V |
| Output Leakage Current | IOFF | VOUT = 3.5 V, Output off | <1.0 | 1.0 | A | |
| Output On Voltage | VOUT | IOUT = 1 mA, VDD = 2.75 V | 100 | 300 | mV | |
| Awake Time | tawake | 45 | 90 | s | ||
| Period | tperiod | 45 | 90 | ms | ||
| Duty Cycle | d.c. | 0.1 | % | |||
| Chopping Frequency | fC | 340 | kHz | |||
| Supply Current (Chip awake) | IDD(EN) | Chip awake (enabled) | 2.0 | mA | ||
| Supply Current (Chip asleep) | IDD(DIS) | Chip asleep (disabled) | 8.0 | A | ||
| Average Supply Current | IDD(AVG) | VDD = 2.75 V | 5.1 | 10 | A | |
| Average Supply Current | IDD(AVG) | VDD = 3.5 V | 6.7 | 10 | A |
| Characteristic | Symbol | Test Conditions | Min. | Typ. | Max. | Units |
|---|---|---|---|---|---|---|
| Operate Points (South Pole) | BOPS | Branded side; B > BOP, VOUT = Low (Output On) | 37 | 55 | G | |
| Operate Points (North Pole) | BOPN | Branded side; B > BOP, VOUT = Low (Output On) | 55 | 40 | G | |
| Release Points (South Pole) | BRPS | Branded side; B < BRP, VOUT = High (Output Off) | 10 | 31 | G | |
| Release Points (North Pole) | BRPN | Branded side; B < BRP, VOUT = High (Output Off) | 34 | 10 | G | |
| Hysteresis | BHYS | |BOPx - BRPx| | 5.9 | G | ||
| Operate Points (South Pole) | BOPS | Range E: TA = 40C to 85C | 37 | 55 | G | |
| Range L: TA = 40C to 150C | 37 | 65 | G | |||
| Operate Points (North Pole) | BOPN | Range E: TA = 40C to 85C | 55 | 40 | G | |
| Range L: TA = 40C to 150C | 65 | 40 | G | |||
| Release Points (South Pole) | BRPS | Range E: TA = 40C to 85C | 10 | 31 | G | |
| Range L: TA = 40C to 150C | 10 | 31 | G | |||
| Release Points (North Pole) | BRPN | Range E: TA = 40C to 85C | 34 | 10 | G | |
| Range L: TA = 40C to 150C | 34 | 10 | G | |||
| Hysteresis | BHYS | Range E: TA = 40C to 85C | 5.9 | G | ||
| Range L: TA = 40C to 150C | 5.9 | G | ||||
2410010303_ALLEGRO-A3212EUA-T_C139821.pdf
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