A1220, A1221, A1222, and A1223: Chopper-Stabilized Precision Hall-Effect Latches

Description

Allegro MicroSystems recommends APS12200/10/30 for all new Automotive 3-wire Hall-Effect latch IC designs. 

The A1220, A1221, A1222, and A1223 Hall-effect sensor ICs are extremely temperature-stable and stress-resistant devices especially suited for operation over extended temperature ranges to 150°C. Superior high-temperature performance is made possible through dynamic offset cancellation, which reduces the residual offset voltage normally caused by device overmolding, temperature dependencies, and thermal stress. Each device includes on a single silicon chip a voltage regulator, Hall-voltage generator, small-signal amplifier, chopper stabilization, Schmitt trigger, and a short-circuit protected open-drain output to sink up to 25 mA. A south pole of sufficient strength turns the output on. A north pole of sufficient strength is necessary to turn the output off.

An onboard regulator permits operation with supply voltages of 3 to 24 V. The advantage of operating down to 3 V is that the device can be used in 3 V applications or with additional external resistance in series with the supply pin for greater protection against high voltage transient events.

Two package styles provide magnetically optimized packages for most applications. Package type LH is a modified 3-pin SOT23W surface-mount package, while UA is a three-pin ultra-mini SIP for through-hole mounting. Both packages are lead (Pb) free, with 100% matte-tin-plated leadframes.

 

 

Top Features

  • AEC-Q100 automotive qualified 
  • Symmetrical latch switchpoints
  • Resistant to physical stress
  • Superior temperature stability
  • Output short-circuit protection
  • Operation from unregulated supply down to 3 V
  • Reverse battery protection
  • Solid-state reliability
  • Small package sizes

Part Number Specifications and Availability

Part Number Package Type Temperature RoHS
Compliant
Part Composition /
RoHS Data
Comments Samples Check Stock
A1220ELHLT-T 3-lead SOT -40°C to 85°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
A1220ELHLX-T 3-lead SOT -40°C to 85°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
A1220EUA-T 3-lead SIP -40°C to 85°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
A1220LLHLT-T 3-lead SOT -40°C to 150°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
A1220LLHLX-T 3-lead SOT -40°C to 150°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
A1220LUA-T 3-lead SIP -40°C to 150°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
A1221ELHLT-T 3-lead SOT -40°C to 85°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
A1221ELHLX-T 3-lead SOT -40°C to 85°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
A1221EUA-T 3-lead SIP -40°C to 85°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
A1221LLHLT-T 3-lead SOT -40°C to 150°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
A1221LLHLX-T 3-lead SOT -40°C to 150°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
A1221LUA-T 3-lead SIP -40°C to 150°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
A1222ELHLT-T 3-lead SOT -40°C to 85°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
A1222ELHLX-T 3-lead SOT -40°C to 85°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
A1222EUA-T 3-lead SIP -40°C to 85°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
A1222LLHLT-T 3-lead SOT -40°C to 150°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
A1222LLHLX-T 3-lead SOT -40°C to 150°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
A1222LUA-T 3-lead SIP -40°C to 150°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
A1223ELHLT-T 3-lead SOT -40°C to 85°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
A1223ELHLX-T 3-lead SOT -40°C to 85°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
A1223EUA-T 3-lead SIP -40°C to 85°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
A1223LLHLT-T 3-lead SOT -40°C to 150°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
A1223LLHLX-T 3-lead SOT -40°C to 150°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
A1223LUA-T 3-lead SIP -40°C to 150°C Yes View Data Contact your
local sales rep
Check
Distributor Stock

Allegro’s products are not to be used in any devices or systems, including but not limited to life support devices or systems, in which a failure of Allegro’s product can reasonably be expected to cause bodily harm.

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