ATS612LSB

DYNAMIC, SELF-CALIBRATING, PEAK-DETECTING,

DIFFERENTIAL HALL-EFFECT GEAR-TOOTH SENSOR

11

www.allegromicro.com

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.

Test Method and

Samples

Qualification Test

Test Conditions

Test Length

Per Lot

Comments

Temperature Humidity

JESD22-A101,

1000 hrs

77

Device biased for

Bias Life

minimum power

Bias Life

JESD22-A108,

1000 hrs

77

(Surge Operating Life)

JESD22-A108,

168 hrs

77

Autoclave, Unbiased

JESD22-A102,

96 hrs

77

High-Temperature

JESD22-A103,

1000 hrs

77

(Bake) Storage Life

Temperature Cycle

JESD22-A104

1000 cycles

77

-55

°C to +150°C

ESD,

CDF-AEC-Q100-002

Pre/Post

3 per

Test to failure

Human Body Model

Reading

test

Pin 3 > 1.5 kV

All other pins > 3 kV

GEAR/TARGET SYSTEM EVALUATION*

An analog map of the magnetic signal can be

obtained by measuring the voltage at pin 3 (the capacitor

pin) while the device is running. The peak and valley hold

voltage will represent the peak-to-peak value of the signal.

More accurate measurements can be taken by connecting

an extremely small capacitor (0.05

µF) from pin 3 to

ground. After the device is powered up and has switched

at least 64 times, a 1 k

Ω bleed-off resistor should be

installed in parallel with the capacitor without powering

down the device. If the gear is then rotated at an ex-

tremely low speed, an analog representation of the gain-

adjusted signal can be measured at pin 3. Note that the

device should be re-powered at each air gap and the

above procedure repeated for accurate measurements. In

both cases, the analog signal may be compared to the

typical hysteresis of the device and device performance

can be estimated.

* In application, the terms “gear” and “target” are often

interchanged. However, “gear” is preferred when motion

is transferred.