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Position Sensor ICs

For Automotive, Industrial, and Consumer Applications

Allegro's Hall-effect position sensor ICs detect changes in magnetic flux density, allowing them to distinguish movement and position. These contactless sensing solutions require few external components and can withstand the hostile operating conditions of multiple applications from automotive to industrial.

Image of Hall-Effect Digital SwitchesHall-Effect Digital Switches

  • Single / Differential Hall-Effect Sensors
  • Chopper stabilized / Continuous
  • Unipolar / Omnipolar

Hall-Effect Digital Latches

  • Unipolar / Omnipolar
  • Chopper stabilized / Continuous
  • Planar or Vertical Hall-Effect Sensors

Hall-Effect Speed / Direction / Multi-Elements

  • Dual Planar Hall-Effect Sensor
  • One Planar / One Vertical Hall-Effect Sensors
  • 3D Hall-Effect Sensor

Hall-Effect Sensor Basics

Image of Hall-Effect Sensor Basics

Latch Hall-Effect Switches Selection | Switch Hall-Effect Switches Selection

Allegro’s Hall-effect linear position sensor ICs enable highly accurate contactless sensing of either magnet or ferrous objects, and depending upon the specific linear sensor, can be factory and/or customer programmed. Allegro’s linear position sensor IC portfolio supports analog, PWM and standard digital output protocols such as SENT (Single Edge Nibble Transmission) and are available in various bandwidth, resolution and accuracy options. They are offered in ultra-small packages, including the SOT23-W surface mount package and the 1 mm thick single in-line KT package.

Image of Automotive Position Sensor ICs

Specific advantages of Allegro’s solutions include:

  • 4x chopper-stabilization for offset cancellation provides: enhanced switch point stability that increases accuracy in measuring motor speed or duty cycle, and industry leading jitter performance that outperforms the competition
  • Low voltage (3 V) operation and lower ICC for more power efficient devices
  • Many standard products are designed to survive harsh automotive transient conditions, including double battery and 40 V load dump, without a limiting series resistor, which eliminates the need for external components and prevents transient voltage field failures

Latch Hall-Effect Switches Selection | Switch Hall-Effect Switches Selection

Hall-effect latches are most commonly used in sensing multi-pole ring magnets for motor commutation, because they require a south pole of sufficient strength to turn the output on and a north pole of sufficient strength to turn the output off.

Image of Electronic Flow Meter

Specific advantages of Allegro’s solutions include:

  • 4x chopper-stabilization for offset cancellation provides: enhanced switch point stability that increases accuracy in measuring motor speed or duty cycle, and industry leading jitter performance that outperforms the competition
  • Low voltage (3 V) operation and lower ICC for more power efficient devices
  • Many standard products are designed to survive harsh automotive transient conditions, including double battery and 40 V load dump, without a limiting series resistor, which eliminates the need for external components and prevents transient voltage field failures

Latch Hall-Effect Switches Selection | Switch Hall-Effect Switches Selection

Image of Consumer Hall-Effect

Micropower switches are integrated Hall-effect sensor ICs designed specifically for use in battery-operated devices, providing low power consumption for longer battery life. They are typically used for on/off switches (open/close) in cellular flip-phones, PDAs, and laptop computers, or for detecting motion in utility meters.

Features:

  • Low power
  • Small packaging

Latch Hall-Effect Switches Selection | Switch Hall-Effect Switches Selection

General Purpose Stabilized Latches
Part Number Operate Point (G) Release Point (G) Hysteresis (G) Temp. Ranges Packages Output Replaces
A1220 5 to 40 -40 to -5 Typ 45 E, L LH, UA Open Drain A3280
A1221 15 to 90 -90 to -15 Typ 100 E, L LH, UA Open Drain A3281
A1222 70 to 150 -150 to -70 Typ 220 E, L LH, UA Open Drain
A1223 100 to 180 -180 to -100 Typ 300 E, L LH, UA Open Drain A3283
A1250 -10 to 25 -25 to 10 5 to 25 L LH, UA Open Drain A3230
General Purpose Stabilized Latches (Vertical Hall)
Part Number Operate Point (G) Release Point (G) Hysteresis (G) Temp. Ranges Packages Output Replaces
A1260 5 to 50 -50 to 5 Typ 50 E, L LH, UA Open Drain Vertical Hall
Dual Hall Element
Part Number Operate Point (G) Release Point (G) Hysteresis (G) Temp. Ranges Packages Output Replaces
A1230 30 -30 14 L L, K Open Drain Quadriture
A1232 30 -30 20 L LE Open Drain Speed / Direction
A1233 55 -55 30 L L, K Open Drain Speed / Direction or Quadriture
EMC Robust Chopper Stabilized Latches
Part Number Operate Point (G) Release Point (G) Hysteresis (G) Temp. Ranges Packages Output Replaces
A1225 140 to 300 -300 to -140 340 to 540 L LT, UA Open Drain
A1227 50 to 175 -175 to -50 100 to 350 L LT, UA Open Drain
A1229 80 to 200 -80 to -200 160 to 400 L LT, UA Open Drain
Two-Wire Chopper Stabilized Latch
Part Number Operate Point (G) Release Point (G) Hysteresis (G) Temp. Ranges Packages Output Replaces
A1244 5 to 80 80 to -5 40 to 110 L LH, UA Current Source
A1245 5 to 40 -40 to -5 15 to 65 L LH, UA Current Source
Commerical-Grade Chopper Stabilized Latches
Part Number Operate Point (G) Release Point (G) Hysteresis (G) Temp. Ranges Packages Output Replaces
A3290 5 to 50 -50 to -5 10 to 100 K LH, UA Open Drain
A3291 10 to 100 -100 to -10 20 to 100 K LH, UA Open Drain
Bipolar Hall-Effect Digital Switches
Part Number Operate Point (G) Release Point (G) Hysteresis (G) Temp. Ranges Packages Output Replaces
A1202 <75 >-75 >30 L UA UGx3133
A1203 <95 >-95 >30 E, L LH, UA UGx3132
A1205 -40 to 50 -50 to 40 5 to 55 L LH, UA A3134
A1250 -10 to 25 -25 to 10 5 to 25 L LH, UA Open Drain A3230
Continuous Time Latches
Part Number Operate Point (G) Release Point (G) Hysteresis (G) Temp. Ranges Packages Output Replaces
A1210 25 to 150 -150 to -25 >50 (typ 180) E, L LH, UA Open Drain UGN3177
A1211 15 to 180 -180 to -15 >80 (typ 180) L UA Open Drain UGN3175
A1212 50 to 175 -175 to -50 100 to 350 L LH, UA Open Drain A3187
A1213 80 to 200 -200 to -80 160 to 400 L LH, UA Open Drain A3188, A3189
A1214 140 to 300 -300 to -140 280 to 600 L LH, UA Open Drain A3185

Temperature range codes: S = -20°C to 85°C, E = -40°C to 85°C, K = -40°C to 125°C, L = -40°C to 150°C

General Purpose Chopper Stabilized Switches
Part Number Operate Point (G) Release Point (G) Hysteresis (G) Temp. Ranges Packages Output Replaces
A1120 <50 (typ 35) >5 (typ 25) Typ 10 E, L LH, UA Open Drain A3240
A1121 <120 >40 >10 Typ 25 E, L LH, UA Open Drain A3241
A1122 <205 >105 >10 Typ 25 E, L LH, UA Open Drain A3242
A1123 <355 >150 >30 Typ 55 E, L LH, UA Open Drain n/a
A1125 <50 (typ 35) >5 (typ 25) Typ 10 E, L LH, UA Open Drain A3340
A1126 <|55| <|50| 5 to 30 L LH, UA Open Drain A3245
Fixed Switch Point Two-Wire Chopper Stabilized Switches
Part Number Operate Point (G) Release Point (G) Hysteresis (G) Temp. Ranges Packages Output Replaces
A1150 <110 >45 5 to 30 L LH, UA Current Source A1140
A1152 <110 >45 5 to 30 L LH, UA, UB Current Source A3361, A1142
A1153 <110 >45 5 to 30 L LH, UA, UB Current Source A3163, A3362, A1143
A1155 20 to 60 10 to 55 5 to 30 L LH, UA, UB Current Source A1145
A1156 20 to 60 10 to 55 5 to 30 L LH, UA, UB Current Source A1146
A1157 20 to 80 10 to 60 5 to 30 L LH, UA Current Source A1147
A1158 20 to 80 10 to 60 5 to 30 L LH, UA Current Source A1148
Programmable Chopper Stabilized Switches
Part Number Operate Point (G) Release Point (G) Hysteresis (G) Temp. Ranges Packages Output Replaces
A1190 10 to 200   5 to 30 L LH, UA 2-Wire A1180
A1192 10 to 200 5 to 30 L LH, UA 2-Wire A1183, A1186
A1128 20 to 650
-650 to -20
5 to 30 L UA 3-Wire
Commercial Grade Unipolar Switch
Part Number Operate Point (G) Release Point (G) Hysteresis (G) Temp. Ranges Packages Output Replaces
A3295 <75 >5 Typ 10 K LH, UA Open Drain
Chopper Stabilized Switches with Integrated Diagnostics
Part Number Operate Point (G) Release Point (G) Hysteresis (G) Temp. Ranges Packages Output Replaces
A1160 <245 >60 Typ 55 L LH Open Drain User enabled self-diagnostics
Continuous Time Unipolar Switches
Part Number Operate Point (G) Release Point (G) Hysteresis (G) Temp. Ranges Packages Output Replaces
A1101 30 to 175 10 to 140 20 to 80 E, L LH, UA Open Drain A3141
A1102 115 to 245 60 to 190 30 to 80 E, L LH, UA Open Drain A3142
A1103 205 to 355 150 to 300 30 to 80 E, L LH, UA Open Drain A3143
A1104 35 to 450 25 to 430 >20 E, L LH, UA Open Drain A3144
A1106 260 to 430 160 to 330 70 to 140 E, L LH, UA Open Drain A3121, A3122, A3123
Micropower Switches (1D)
Part Number Operating Voltage (V) Operate Point (G) Release Point (G) Hysteresis (G) Temp. Ranges Packages Supply Current (µA)
A1171 1.65 to 3.5 ±55 ±6 Typ 6 E EW 4 (typ)
(VDD= 1.8 V)
A3211 2.5 to 3.5 ±55 ±10 Typ 7.7 E EL, EH, LH 6 (typ)
A3212 2.5 to 3.5 ±55 ±10 Typ 7.7 E EL, EH, LH, UA 6 (typ)
A3213 2.4 to 5.5 ±70 ±10 Typ 7.7 E, L LH, UA 850 (max)
A3214 2.4 to 5.5 ±70 ±10 Typ 7.7 E, L LH, UA 22 (max)
Micropower Switches (3D)
A1266 2.5 to 5.5 ±25 ±17.5 7.5 E LH 7.5 (typ) @ 2.5 V

Temperature range codes: S = -20°C to 85°C, E = -40°C to 85°C, K = -40°C to 125°C, L = -40°C to 150°C