Product Overview
The A1220, A1221, A1222, and A1223 are extremely temperature-stable and stress-resistant Hall-effect sensor ICs designed for operation over extended temperature ranges up to 150C. They feature dynamic offset cancellation for superior high-temperature performance, reducing residual offset voltage caused by overmolding, temperature dependencies, and thermal stress. These devices 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 is supported from 3 to 24 V supply voltages, with reverse-battery protection and solid-state reliability. Available in SOT23W (LH) and SIP (UA) packages.
Product Attributes
- Brand: Allegro MicroSystems
- Certifications: AEC-Q100 automotive qualified, Quality Managed (QM)
- Material: Silicon chip
- Origin: U.S.A.
- Compliance: RoHS COMPLIANT
Technical Specifications
| Part Number | Package | Ambient Temp. Range | BRP (Min) | BOP (Max) |
|---|
| A1220ELHLX-T | 3-pin SOT23W surface mount | 40C to 85C | 40 G | 40 G |
| A1220LLHLX-T | 3-pin SOT23W surface mount | 40C to 150C | 40 G | 40 G |
| A1220EUA-T | 3-pin SIP through hole | 40C to 85C | 40 G | 40 G |
| A1220LUA-T | 3-pin SIP through hole | 40C to 150C | 40 G | 40 G |
| A1221ELHLX-T | 3-pin SOT23W surface mount | 40C to 85C | 90 G | 90 G |
| A1221LLHLX-T | 3-pin SOT23W surface mount | 40C to 150C | 90 G | 90 G |
| A1221EUA-T | 3-pin SIP through hole | 40C to 85C | 90 G | 90 G |
| A1221LUA-T | 3-pin SIP through hole | 40C to 150C | 90 G | 90 G |
| A1222ELHLX-T | 3-pin SOT23W surface mount | 40C to 85C | 150 G | 150 G |
| A1222LLHLX-T | 3-pin SOT23W surface mount | 40C to 150C | 150 G | 150 G |
| A1222EUA-T | 3-pin SIP through hole | 40C to 85C | 150 G | 150 G |
| A1222LUA-T | 3-pin SIP through hole | 40C to 150C | 150 G | 150 G |
| A1223ELHLX-T | 3-pin SOT23W surface mount | 40C to 85C | 180 G | 180 G |
| A1223LLHLX-T | 3-pin SOT23W surface mount | 40C to 150C | 180 G | 180 G |
| A1223EUA-T | 3-pin SIP through hole | 40C to 85C | 180 G | 180 G |
| A1223LUA-T | 3-pin SIP through hole | 40C to 150C | 180 G | 180 G |
Electrical Characteristics
| Characteristic | Symbol | Test Conditions | Min. | Typ. | Max. | Unit |
|---|
| Forward Supply Voltage | VCC | Operating, TJ < 165C | 3 | | 24 | V |
| Output Leakage Current | IOUTOFF | VOUT = 24 V, B < BRP | | | 10 | A |
| Output Saturation Voltage | VOUT(SAT) | IOUT = 20 mA, B > BOP | | 185 | 500 | mV |
| Output Current Limit | IOM | B > BOP | 30 | | 60 | mA |
| Power-On Time | tPO | VCC > 3.0 V, B < BRP(min) 10 G, B > BOP(max) + 10 G | | | 25 | s |
| Chopping Frequency | fC | | | 800 | | kHz |
| Output Rise Time | tr | RL = 820 , CL = 20 pF | | 0.2 | 2 | s |
| Output Fall Time | tf | RL = 820 , CL = 20 pF | | 0.1 | 2 | s |
| Supply Current (ON) | ICC(ON) | B > BOP, VCC = 12 V | | | 4 | mA |
| Supply Current (OFF) | ICC(OFF) | B < BRP, VCC = 12 V | | | 4 | mA |
| Reverse Supply Current | IRCC | VRCC = 20 V | | | 5 | mA |
| Supply Zener Clamp Voltage | VZ | ICC = 5 mA; TA = 25C | 28 | | | V |
| Zener Impedance | IZ | ICC = 5 mA; TA = 25C | | 50 | | |
Magnetic Characteristics
| Characteristic | Part Number | BOP (Max) | BRP (Min) | Unit |
|---|
| Operate Point | A1220 | 40 | 40 | G |
| Operate Point | A1221 | 90 | 90 | G |
| Operate Point | A1222 | 150 | 150 | G |
| Operate Point | A1223 | 180 | 180 | G |
| Release Point | A1220 | 5 | 40 | G |
| Release Point | A1221 | 15 | 90 | G |
| Release Point | A1222 | 70 | 150 | G |
| Release Point | A1223 | 100 | 180 | G |
| Hysteresis | A1220 | 80 | | G |
| Hysteresis | A1221 | 180 | | G |
| Hysteresis | A1222 | 300 | | G |
| Hysteresis | A1223 | 360 | | G |
