ATS665LSGTN-T Allegro Microsystems Inc, ATS665LSGTN-T Datasheet - Page 16

• Manufacturer Part Number: ATS665LSGTN-T
• Description: IC SENSOR HALL GEAR TOOTH 4-SIP
• Manufacturer: Allegro Microsystems Inc
• Type: Special Purposer

Specifications of ATS665LSGTN-T

• Sensing Range: 70% of Air Gap Trip, 30% of Air Gap Release
• Voltage - Supply: 3.3 V ~ 24 V
• Current - Supply: 14mA
• Current - Output (max): 20mA
• Output Type: Digital, Open Collector
• Features: Gear Tooth Type
• Operating Temperature: -40°C ~ 150°C
• Package / Case: 4-SIP
• Operating Supply Voltage (min): 3.3V
• Operating Supply Voltage (typ): 5/9/12/15/18V
• Operating Supply Voltage (max): 24V
• Output Current: 20mA
• Package Type: SIP Module(SG)
• Pin Count: 4
• Mounting: Through Hole
• Operating Temp Range: -40C to 150C
• Operating Temperature Classification: Automotive
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 620-1161-2

Power Derating
Due to internal power consumption, the junction temperature of the
IC, T
ensure that the device does not operate above the maximum rated
junction temperature use the following calculations:
Where:
Where ΔT denotes the temperature rise resulting from the IC’s
power dissipation.
For the IC:
Typical T
Maximum Allowable Power Dissipation Calculation for ATS665:
Assume:
If:
Then, at T
ATS665LSG
ΔT(max) = T
T
T
∴ ΔT = V
J
J
J
, is higher than the ambient environment temperature, T
(max) = 165°C
(max) = 165°C
R
V
I
P
ΔT = P
I
θJA
T
CC
ΔT = P
P
T
J
CC
T
CC
T
D
T
A
A
D
calculation:
A
J
J
J
= T
= 25°C
= 5 V
= 7.0 mA
= 150 °C:
= 126°C/W
= V
= T
= T
= V
= 12.0 mA
= T
A
D
A
A
J
CC
D
A
CC
CC
(max) – T
(max) = 165°C
+ ΔT
× R
+ ΔT
+ ΔT = 25°C + 5.0°C = 30.0°C
× R
× I
× I
× I
θJA
θJA
CC
CC
CC
× R
= 5 V × 8.0 mA = 40.0 mW
= 40.0 mW × 126°C/W = 5.0°C
A
(max) = 165°C –150°C = 15°C
θJA
True Zero Speed, High Accuracy, Gear Tooth Sensor IC
A
. To
If:
Then, at T
If:
Then the maximum V
This value applies only to the voltage drop across the 665 chip. If
a protective series diode or resistor is used, the effective maximum
supply voltage is increased.
For example, when a standard diode with a 0.7 V drop is used:
V
V
P
CC
D
S
(max) = ΔT(max) / R
(max) = 9.9 V + 0.7 V = 10.6 V
(max) = P
30.0
28.0
26.0
24.0
22.0
20.0
18.0
16.0
14.0
12.0
10.0
ΔT = P
P
8.0
6.0
4.0
2.0
0.0
A
Thermal Resistance = 126°C/Watt, T
D
ATS665LSG Package Power De-Rating Curve
20
= 150°C:
= V
D
CC
D
(max) / I
40
× R
× I
θJA
CC
CC
Ambient Temperature [°C]
60
at 150°C is therefore:
CC
θJA
115 Northeast Cutoff
1.508.853.5000; www.allegromicro.com
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 U.S.A.
= 119 mW / 12.0 mA = 9.9 V
80
= 15°C / 126°C/W = 119 mW
c
100
120
jmax
140
= 165°C
160
180
15