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Datasheets:
A1321/2/3: Ratiometric Linear Hall Effect Sensor ICs for High-Temperature Operation (PDF)
Selection Guides:
Hall-Effect Sensor ICs,
Linear Hall-Effect Sensor ICs
Press Releases:
A132x Family: Allegro MicroSystems, Inc. Introduces a Family of Linear Hall-Effect Sensor ICs for High Temperature Operation,
Allegro Microsystems, Inc. Nominated by EDN Magazine in 15th Annual Innovation of the Year Awards Competition
Design Support Tools:
A1321LLHLT Calibrated Linear Hall-Effect Sensor IC,
A1321LUA Calibrated Linear Hall-Effect Sensor IC,
A1322LLHLT Calibrated Linear Hall-Effect Sensor IC,
A1322LUA Calibrated Linear Hall-Effect Sensor IC,
A1323LLHLT Calibrated Linear Hall-Effect Sensor IC,
A1323LUA Calibrated Linear Hall-Effect Sensor IC
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A1321, A1322, and A1323
Ratiometric Linear Hall Effect Sensor ICs for High-Temperature Operation
These parts are in production but have been determined to be NOT FOR NEW DESIGN. This classification indicates that sale of this device is currently restricted to existing customer applications. The device should not be purchased for new design applications because obsolescence in the near future is probable. Samples are no longer available.
Date of status change: August 16, 2010.
Recommended Substitutions: For existing customer transition, and for new customers or new applications, contact Allegro Sales.
Features and Benefits
- Temperature-stable quiescent output voltage
- Precise recoverability after temperature cycling
- Output voltage proportional to magnetic flux density
- Ratiometric rail-to-rail output
- Improved sensitivity
- 4.5 to 5.5 V operation
- Immune to mechanical stress
- Solid-state reliability
- Robust EMC protection
Description
The A132X family of linear Hall-effect sensor ICs are optimized, sensitive, and temperature-stable. These ratiometric Hall-effect sensor ICs provide a voltage output that is proportional to the applied magnetic field. The A132X family has a quiescent output voltage that is 50% of the supply voltage and output sensitivity options of 2.5 mV/G, 3.125 mV/G, and 5 mV/G. The features of this family of devices are ideal for use in the harsh environments found in automotive and industrial linear and rotary position sensing systems.
Each device has a BiCMOS monolithic circuit which integrates a Hall element, improved temperature-compensating circuitry to reduce the intrinsic sensitivity drift of the Hall element, a small-signal high-gain amplifier, and a rail-to-rail low-impedance output stage.
A proprietary dynamic offset cancellation technique, with an internal high-frequency clock, reduces the residual offset voltage normally caused by device overmolding, temperature dependencies, and thermal stress. The high frequency clock allows for a greater sampling rate, which results in higher accuracy and faster signal processing capability. This technique produces devices that have an extremely stable quiescent output voltage, are immune to mechanical stress, and have precise recoverability after temperature cycling. Having the Hall element and an amplifier on a single chip minimizes many problems normally associated with low-level analog signals.
Output precision is obtained by internal gain and offset trim adjustments made at end-of-line during the manufacturing process.
The A132X family is provided in a 3-pin single in-line package (UA) and a 3-pin surface mount package (LH). Each package is available in a lead (Pb) free version (suffix, –T) , with a 100% matte tin plated leadframe.
Functional Block Diagram
| Part Number | Package Type | RoHS Compliant |
Part Composition/ RoHS Data |
Temperature | Comments | Samples | Distributor Stock |
|---|---|---|---|---|---|---|---|
| A1321ELHLT-T | 3-lead SOT | Yes | view data | -40 °C to 85 °C | not for new design |
Contact Local Sales Representative or check distributor stock |
|
| A1321EUA-T | 3-pin SIP | Yes | view data | -40 °C to 85 °C | not for new design |
Contact Local Sales Representative or check distributor stock |
|
| A1321LLHLT-T | 3-lead SOT | Yes | view data | -40 °C to 150 °C | not for new design |
Contact Local Sales Representative or check distributor stock |
|
| A1321LUA-T | 3-pin SIP | Yes | view data | -40 °C to 150 °C | not for new design |
Contact Local Sales Representative or check distributor stock |
|
| A1322LLHLT-T | 3-lead SOT | Yes | view data | -40 °C to 150 °C | not for new design |
Contact Local Sales Representative or check distributor stock |
|
| A1322LUA-T | 3-pin SIP | Yes | view data | -40 °C to 150 °C | not for new design |
Contact Local Sales Representative or check distributor stock |
|
| A1323EUA-T | 3-pin SIP | Yes | view data | -40 °C to 85 °C | not for new design |
Contact Local Sales Representative or check distributor stock |
|
| A1323LLHLT-T | 3-lead SOT | Yes | view data | -40 °C to 150 °C | not for new design |
Contact Local Sales Representative or check distributor stock |
|
| A1323LUA-T | 3-pin SIP | Yes | view data | -40 °C to 150 °C | not for new design |
Contact Local Sales Representative or check distributor stock |
Allegro's products are not to be used in life support devices or systems, if a failure of an Allegro product can reasonably be expected to cause the failure of that life support device or system, or to affect the safety or effectiveness of that device or system.