AS1431 ETC, AS1431 Datasheet

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AS1431

Manufacturer Part Number
AS1431
Description
Precision Adjustable Shunt Reference
Manufacturer
ETC
Datasheet

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Pin Configuration Ñ
Ordering Information
ASTEC Semiconductor
Temperature-compensated: 30 ppm/¡C
Trimmed 0.4% bandgap reference
Internal amplifier with 150 mA capability
Temperature range: Extended to Ð55
to125¡C
Low frequency dynamic output
impedance: < 150 m½
Low output noise
Robust ESD protection
Circuit Type:
Temperature Range:
Bandgap Tolerance:
Precision Adjustable
Shunt Regulator
D = –55 C to +125 C
R4 = 0.4%
CATHODE
N/C
N/C
SOT-23/5L (DBV)
TO-92 (LP)
Top view
CATHODE
ANODE
REFERENCE
REFERENCE
ANODE
AS1431 D R4 D 7
Description
The AS1431 is a three-terminal adjustable shunt regulator providing a
highly accurate 0.4% bandgap reference. The adjustable shunt regulator
is ideal for a wide variety of linear applications that can be implemented
using external components to obtain adjustable currents and voltages.
In the standard shunt configuration, the combination of low temperature
coefficient (TC), sharp turn-on characteristics, low output impedance and
programmable output voltage make this precision reference a perfect
zener diode replacement.
The AS1431 is characterized to operate over the full automotive tem-
perature range of Ð55 to 125¡C and is now available in the SOT-23 (5L)
package.
Precision Adjustable Shunt Reference
1
CATHODE
ANODE
ANODE
N/C
1
2
3
4
SOT-89 (S)
Packaging Option:
Package Style:
SOIC (D)
A
B
T
7
13
D
DBV
LP
S
= Ammo Pack
= Bulk
= Tube
= Tape and Reel (7" Reel Dia)
= Tape and Reel (13" Reel Dia)
= SOIC
= SOT-23/5L
= TO-92
= SOT-89
CATHODE
ANODE
REFERENCE
AS1431
8
7
6
5
REFERENCE
ANODE
ANODE
N/C

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AS1431 Summary of contents

Page 1

... In the standard shunt configuration, the combination of low temperature coefficient (TC), sharp turn-on characteristics, low output impedance and programmable output voltage make this precision reference a perfect zener diode replacement. The AS1431 is characterized to operate over the full automotive tem- perature range of Ð55 to 125¡C and is now available in the SOT-23 (5L) package. CATHODE ...

Page 2

... AS1431 Functional Block Diagram REFERENCE (R) Absolute Maximum Ratings Parameter Cathode-Anode Reverse Breakdown Anode-Cathode Forward Current Operating Cathode Current Reference Input Current Continuous Power Dissipation at 25¡C TO-92 8L SOIC SOT-89 SOT-23/5L Junction Temperature Storage Temperature Lead Temperature Soldering 10 Seconds 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 sec- tions of this specification is not implied ...

Page 3

... V, REF ² 1 kHz 100 mA K • mV REF T • 100 125 Temperature ( C) • ppm AS1431 = V and unless otherwise stated. REF K Typ. Max. Unit Circuit 2.510 V 1 2.530 V 1 0.06 0.16 mV/¡C 1 Ð1.1 mV ...

Page 4

... AS1431 Test Circuits REF I I REF K Figure 1a. Test Circuit 1 ASTEC Semiconductor Precision Adjustable Shunt Reference REF (V ) REF R 2 Figure 1b. Test Circuit (OFF) Figure 1c. Test Circuit 3 ...

Page 5

... Reference Voltage vs Ambient Temperature 2. REF 2. 2.51 2. 2.500 REF 2.49 2.48 2.47 2.46 2.45 90 120 –60 –30 5 AS1431 REF – Cathode Voltage (V) KA Figure 120 T – Ambient Temperature ( C) A Figure 5 ...

Page 6

... AS1431 Typical Performance Curves Reference Input Current 3.0 2.5 2.0 1.5 1.0 0.5 0 –60 – – Ambient Temperature ( C) A Figure 6 Noise Voltage 100 – Frequency (Hz) Figure 8 ASTEC Semiconductor Precision Adjustable Shunt Reference Reference Voltage Line Regulation = – ...

Page 7

... Temperature Range: –55 to 125 100 k f – Frequency (Hz) ASTEC Semiconductor Dynamic Output Impedance 100 100 – Frequency (Hz) Figure Figure 11 7 AS1431 10 M OUT I K 230 15 k 8.25 k GND ...

Page 8

... AS1431 Typical Performance Curves Pulse Response 6 Input Output – – Time (ms) Stability Boundary Conditions 100 REF ...

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