Datasheet AS300VST, AS300VSB, AS300VSA, AS300G7, AS300G13 Datasheet (ASTEC)

1

ASTEC Semiconductor

AS300

Shunt Temperature Sensor

Features

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Calibrated directly in Kelvin

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Linear 10 mV/¡C scale factor

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1¡C typical accuracy at 27¡C (300 K)

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Fully rated for Ð40 to 125¡C
(233 to 398 K)

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Suitable for remote applications

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Low-impedance output, 0.3 ½ for a
1 mA load

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Now available in the SOT-223 for
improved substrate temperature
sensing

Description

The AS300 is a two-terminal integrated circuit temperature sensor. It is
a precision-trimmed shunt type regulator that emulates a zener diode
in function. Its output voltage is linearly proportional to temperature in
Kelvin. The output voltage is calibrated for 3.000 V at 27¡C (300 K) and
increases by 10 mV/¡C.

The AS300 is available in four packages.The SOT-223 offers a large
heat-sink for transferring heat to the die for fast and accurate thermal
sensing. The SOT-223 is especially effective at sensing the tem­perature of hybrid and MCM substrates. The SOT-23 is best-suited
for applications requiring a small footprint or precision force/sense
metering.

SEMICONDUCTOR

Pin Configuration Ñ Top view

Ordering Information

V

TEMP

TO-92 (LP) SOT-223 (G)

GND (F)

GND (S)

V

TEMP

GND (F)

GND (S)

SOIC (D)

N/C

N/C

V

TEMP

(F)

V

TEMP

(F)

GND (S)

GND (F)

N/C

N/C

1

2

3

4

8

7

6

5

SOT-23/3L (VS)

V

TEMP

GND

GND

Circuit Type:
Shunt Temperature Sensor

AS300 LP A

Packaging Option:
A
B
T
7
13

Package Style:
D
G
LP
VS

= Ammo Pack
= Bulk
= Tube
= Tape and Reel (7" Reel Dia)
= Tape and Reel (13" Reel Dia)

= SOIC
= SOT-223
= TO-92
= SOT-23/3L

2

ASTEC Semiconductor

AS300 Shunt Temperature Sensor

Functional Block Diagram

Pin Function Description

Pin Number

TO, SOT SOIC Function Description

1 1 GND (S) Optional sense pin ground, otherwise tie to substrate pin GND (F).

2 2 GND (F) Signal ground and circuit substrate.

3 6 V

TEMP

(F) Output voltage proportional to temperature. V

TEMP

is nominally 3.00 V

at 27¡C (300 K) and increases at 10 mV/¡C.

Ð 5 V

TEMP

(S) Optional sense pin for V

TEMP

. Available on the 8L SOIC package only.

Tie pin to V

TEMP

(F) if not using force/sense metering.

10 mV/°C

GND

V

TEMP

+

+
–

–

Absolute Maximum Ratings

Parameter Symbol Rating Unit

Supply Current I

REF

20 mA

Continuous Power Dissipation at 25¡C P

D

TO-92 775 mW

SOT-223 1250 mW

8L SOIC 750 mW

SOT-23/3L 200 mW

Junction Temperature T

J

150 ¡C

Operating Temperature Ð40 to 125 ¡C

Storage Temperature T

STG

Ð65 to 150 ¡C

Lead Temp, Soldering 10 Seconds T

L

300 ¡C

Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause permanent damage to the device. This is a
stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sec­tions of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability.

3

ASTEC Semiconductor

AS300Shunt Temperature Sensor

Typical Thermal Resistances

Package θ

JA

θ

JC

Typical Derating

TO-92 160¡C/W 80¡C/W 6.3 mW/¡C

SOT-223 115¡C/W 8¡C/W 8.7 mW/¡C

8L SOIC 175¡C/W 45¡C/W 5.7 mW/¡C

SOT-23/3L 575¡C/W 150¡C/W 1.7 mW/¡C

Electrical Characteristics

Electrical Characteristics are guaranteed over the full junction temperature range (Ð40 to 125¡C). Ambient temperature must be
derated based upon power dissipation and package thermal characteristics.

Parameter Symbol Test Condition Min. Typ. Max. Unit

Output Voltage V

TEMP

IK= 2 mA, TJ= 27¡C (300 K) 2.970 3.000 3.030 V

V

TEMP

IK= 2 mA, TJ= 100¡C (373 K) 3.690 3.730 3.770 V

Temperature Coefficient Error IK= 2 mA, deviation from 10 mV/¡C 40 µV/¡C

Minimum Operating Current I

K(min)

0.6 mA

Output Impedance Z

KA

IK= 0.6 to 5.5 mA 0.3 2 ½

V

TEMP

I

K

V

IN

Test Circuit

Figure 1

4

ASTEC Semiconductor

AS300 Shunt Temperature Sensor

Typical Performance Curves

Figure 2

Figure 4

Figure 3

Figure 5

–50 –25

250 300 350 400 (K)

0 25 50 75 100 125 (°C)

5.0

4.5

4.0

3.5

3.0

2.5

2.0

1.5

T – Temperature

V

TEMP

– Output Voltage (V)

Output Voltage

IK = 2 mA

0.01 0.1 1.0 10 100

0.7

0.6

0.5

0.4

0.3

0.2

0.1

0

–0.1

Forward Characteristics

T

J

= 27°C

IF – Forward Current (µA)

V

F

– Forward Voltage (V)

8L SOIC

TO-92

SOT-223

0 4 8 12 16 20 24

Time (s)

120

100

80

60

40

20

0

Percent of Thermal Equilibrium (%)

Thermal Response by Package in Still Air

0 2 4 6 8 10 12

120

100

80

60

40

20

0

8L SOIC

TO-92

SOT-223

Time (s)

Percent of Thermal Equilibrium (%)

Thermal Response by Package in a Stirred Oil Bath

5

ASTEC Semiconductor

AS300Shunt Temperature Sensor

Typical Performance Curves

Figure 6

Figure 8

Figure 7

Figure 9

0 1 2

V

TEMP

– Output Voltage (V)

3 4

0

0.25

0.50

0.75

1.00

1.25

1.50

I

K

– Reverse Current (mA)

Operating Characteristics

100°C

27°C

0°C

0 1 2

V

TEMP

– Output Voltage (V)

3 4

0

100

10

1.0

1k

10k

I

K

– Reverse Current (µA)

Operating Characteristics

100°C

27°C

0°C

0.01 0.1 1.0 10 10 1k

1k

100

10

1.0

0.1

0.01

f – Frequency (kHz)

TJ = 27°C
I

K

= 2 mA

Dynamic Impedance

Z

K

– Output Impedance (Ω)

0 25 50 500 600

4

3

2

1

0

5

0

INPUT

V

IN

1k

V

OUT

TJ = 27°C

OUTPUT

t – Time (µs)

Transient Response

Input and Output Voltage (V)

6

ASTEC Semiconductor

AS300 Shunt Temperature Sensor

Typical Applications

15 V

9.1k 15k 20k

AS431

AS300

500

2N2907

Figure 10 Figure 11

Linear Fan Controller

Linear Fan Controller Thermostat

Fahrenheit Thermometer

Ð

+

LM358

Ð

+

LM358

Ð

+

LM339

Adjust R1 to set 0°F reading (120k)
Adjust R2 to set 100°F reading (2.7k)

R2

R1

AS1004-1.2

100 µA Full Scale

Analog Meter

130k

AS300

9 V

5k

M

12 VDC, 120 mA
Brushless Fan

1.2 V

120k

91k

10k

10k

AS300

34k

IRF233

AS300

1 nF

Figure 12 Figure 13

R3

R1 R2

V

CC

M

12 VDC, 120 mA
Brushless Fan

A