ATS616LSGTN-T Allegro Microsystems Inc, ATS616LSGTN-T Datasheet - Page 12

• Manufacturer Part Number: ATS616LSGTN-T
• Description: IC,HALL-EFFECT SWITCH,DIFFERENTIAL,BIPOLAR,SIP,4PIN,PLASTIC
• Manufacturer: Allegro Microsystems Inc
• Type: Special Purposer

Specifications of ATS616LSGTN-T

• Rohs Compliant: YES
• Sensing Range: 60G
• Voltage - Supply: 3.5 V ~ 24 V
• Current - Supply: 12mA
• Current - Output (max): 55mA
• Output Type: Digital, Open Collector
• Features: Gear Tooth Type
• Operating Temperature: -40°C ~ 150°C
• Package / Case: 4-SIP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 620-1116-2

ATS616LSG
The device must be operated below the maximum junction
temperature of the device, T
peak conditions, reliable operation may require derating sup-
plied power or improving the heat dissipation properties of the
application. This section presents a procedure for correlating
factors affecting operating T
the 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
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
A
CC
, and air motion are significant external factors, damped by
T = P
= 12 V, I
T = P
CC
P
D
= 4 mA, and R
= V
T
J
D
P
T
= T
D
J
CC
×
= T
= V
A
R
×
D(max)
+ T = 25°C + 7°C = 32°C
A
JA
D
IN
I
+ ΔT
CC
×
J(max)
J
×
= 48 mW
. (Thermal data is also available on
, represents the maximum allow-
R
= 12 V
(1)
(3)
JA
J
I
JA
JA
, at P
IN
. Under certain combinations of
. Ambient air temperature,
= 140°C/W, then:
JA
D
×
.
×
, is a figure of merit sum-
Dynamic Self-Calibrating Peak-Detecting Differential
4 mA = 48 mW
140°C/W = 7°C
A
= 25°C,
Power Derating
JC
D
), can
(2)
, is
able power level (V
at a selected R
Example: Reliability for V
minimum-K PCB.
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
This value applies only to the voltage drop across the ATS616
chip. If a protective series diode or resistor is used, the effec-
tive maximum supply voltage is increased. For example, when a
standard diode with a 0.7 V drop is used:
CC(max)
JA
JA
CC(max)
V
T
CC(est)
. If V
= 126°C/W, T
P
max
Hall Effect Gear Tooth Sensor IC
= 12 mA.
V
D(max)
is reliable under these conditions.
= T
= P
CC(est)
CC(max)
CC(est)
J(max)
D(max)
JA
= T
≥ V
and T
to V
= 9.9 V + 0.7 V = 10.6 V
J(max)
– T
CC(max)
÷ I
max
CC(max)
CC(max)
A
CC(max)
A
= 165°C, V
÷ R
= 165 °C – 150 °C = 15 °C
.
CC(est)
CC
115 Northeast Cutoff
1.508.853.5000; www.allegromicro.com
, I
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 U.S.A.
JA
, then operation between V
CC(max)
A
. If V
at T
= 119 mW ÷ 12 mA = 9.92 V
, the application and device can
= 15°C ÷ 126°C/W = 119 mW
and V
A
CC(est)
= 150°C, package SG, using
CC(max)
), without exceeding T
CC(max)
≤ V
J
= 24 V, and
resulting from internal
CC(max)
requires enhanced
D(max)
CC(est)
, then reli-
CC(est)
. First,
.
J(max)
and
12
,