ATS632LSC View Datasheet(PDF) - Allegro MicroSystems

Part Name

Description

Manufacturer

ATS632LSC

ZERO-SPEED, SELF-CALIBRATING, NON-ORIENTED, HALL-EFFECT GEAR-TOOTH SENSOR

Allegro MicroSystems 

ATS632LSC

HALL-EFFECT

GEAR-TOOTH SENSOR

SUBASSEMBLY

CRITERIA FOR DEVICE QUALIFICATION

All Allegro sensors are subjected to stringent qualification requirements prior to being released to production. To

become qualified, except for the destructive ESD tests, no failures are permitted.

Qualification Test

Test Method and

Test Conditions

Test Length

Samples

Per Lot

Comments

Temperature Humidity

Bias Life

Bias Life

(Surge Operating Life)

Autoclave, Unbiased

High-Temperature

(Bake) Storage Life

Temperature Cycle

JESD22-A101,

TA = 85°C, RH = 85%

JESD22-A108,

TA = 150°C, TJ = 165°C

JESD22-A108,

TA = 175°C, TJ = 190°C

JESD22-A102,

TA = 121°C, 15 psig

JESD22-A103,

TA = 170°C

JESD22-A104

1000 hrs

48

1000 hrs

48

168 hrs

48

96 hrs

48

1000 hrs

48

1000 cycles

48

Device biased for

minimum power

-55°C to +150°C

ESD,

Human Body Model

CDF-AEC-Q100-002

Pre/Post

Reading

3 per

test

Test to failure

All leads > 8 kV

APPLICATIONS INFORMATION

Recommended Evaluation Technique. The self-

calibrating feature of the ATS632LSC requires that a

special evaluation technique be used to measure its high-

accuracy performance capabilities. Installation inaccura-

cies are calibrated out at power on; hence, it is extremely

important that the device be re-powered at each air gap

when gathering timing accuracy data.

Self-Calibrating Functions. This subassembly is

designed to minimize performance variation caused by

the large air gap variations resulting from installation by

self-calibrating at power-on. It is also designed to mini-

mize performance variation caused by the smaller, slower

air gap changes resulting from temperature change and

gear run-out during continuous operation by updating the

self-calibration periodically (after every 64 output pulses) if

necessary. These two functions should be tested using

the following procedure.

1. Set the air gap to the desired value.

2. Power down and then power on the device.

3. Rotate the target at the desired speed.

4. Wait for calibration to complete (16 output pulses to

occur).

5. Monitor output for correct switching and measure

accuracy.

6. Repeat the above for multiple air gaps within the

operating range of the device.

7. This can be repeated over the entire temperature

range.

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