ATS682LSHTN-T Allegro Microsystems Inc, ATS682LSHTN-T Datasheet - Page 14

• Manufacturer Part Number: ATS682LSHTN-T
• Description: IC HALL EFFECT SENSOR 4SIP
• Manufacturer: Allegro Microsystems Inc
• Type: Linear Field Sensorr

Specifications of ATS682LSHTN-T

• Package / Case: 4-SIP
• Sensing Range: 120mV Trip, 120mV Release
• Voltage - Supply: 4 V ~ 24 V
• Current - Supply: 16.8mA
• Output Type: Analog
• Features: Gear Tooth Type
• Operating Temperature: -40°C ~ 150°C
• Bandwidth: 40kHz
• Supply Voltage Max: 24V
• Hall Effect Type: Gear Tooth
• Operating Temperature Range: -40°C To +150°C
• Supply Voltage Min: 4V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Output (max): -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 620-1327-2

ATS682LSH
The device must be operated below the maximum junction tem-
perature of the device, T
peak conditions, reliable operation may require derating supplied
power or improving the heat dissipation properties of the appli-
cation. This section presents a procedure for correlating factors
affecting operating T
Allegro MicroSystems Web site.)
The Package Thermal Resistance, R
marizing the ability of the application and the device to dissipate
heat from the junction (die), through all paths to the ambient air.
Its primary component is the Effective Thermal Conductivity,
K, of the printed circuit board, including adjacent devices and
traces. Radiation from the die through the device case, R
a relatively small component of R
T
overmolding.
The effect of varying power levels (Power Dissipation, P
be estimated. The following formulas represent the fundamental
relationships used to estimate T

For example, given common conditions such as: T
V

A worst-case estimate, P
able power level (V
T
A
J
CC
(max), at a selected R
, and air motion are significant external factors, damped by
T = P
= 12 V, I
T = P
CC
P
T
D
J
= 7 mA, and R
= V
D
= T
P
T
×
CC
D
J
J
A
CC
. (Thermal data is also available on the
= T
(max), I
R
= V
+ T = 25°C + 10.6°C = 35.6°C
JA
JA
J
×
D
(max). Under certain combinations of
A
D
(max), represents the maximum allow-
IN
I
+ ΔT
= 84 mW
and T
×
CC
×
CC
R
= 12 V
JA
J
I
JA
, at P
IN
(max)), without exceeding
A
JA
.
= 126 °C/W, then:
JA
. Ambient air temperature,
D
×
×
.
, is a figure of merit sum-
126 °C/W = 10.6°C
7 mA = 84 mW
A
= 25°C,
Miniature, Two-Wire, True Zero Speed
Power Derating
JC
D
Differential Peak-Detecting Sensor IC
), can
, is
(1)
(2)
(3)
Example: Reliability for V
Observe the worst-case ratings for the device, specifically:
R
I
Calculate the maximum allowable power level, P
invert equation 3:
This provides the allowable increase to T
power dissipation. Then, invert equation 2:
Finally, invert equation 1 with respect to voltage:
The result indicates that, at T
dissipate adequate amounts of heat at voltages ≤V
Compare V
able operation between V
R
V
CC
JA
JA
CC
V
T(max) = T
P
= 16.8 mA.
CC(est)
(max) is reliable under these conditions.
. If V
= 126°C/W, T
D
(max) = T(max) ÷ R
= P
CC(est)
CC(est)
D
(max) ÷ I
J
(max) – T
≥ V
to V
J
(max) = 165°C, V
CC(max)
CC
CC
(max). If V
CC(est)
CC
A
= 119 mW ÷ 16.8 mA = 7.1V
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Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 U.S.A.
, then operation between V
= 165 °C – 150 °C = 15 °C
A
at T
JA
, the application and device can
and V
A
= 15°C ÷ 126 °C/W = 119 mW
= 150°C.
CC(est)
CC
CC
(max) = 24 V, and
(max) requires enhanced
J
resulting from internal
≤ V
CC
(max), then reli-
D
CC(est)
(max). First,
CC(est)
.
and
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