3

ASTEC Semiconductor

AS1431

Precision Adjustable Shunt Reference

Electrical Characteristics

Electrical Characteristics are guaranteed over full junction temperature range (Ð55 to 125¡C). Ambient temperature must be derated

based on power dissipation and package thermal characteristics. The conditions are: V

Parameter

Symbol

Test Condition

Min.

Typ.

Max.

Unit

Circuit

Reference Voltage

V

REF

T

2.490

2.500

2.510

V

1

Over temp.

2.470

2.530

V

1

ÆV

TC

0.06

0.16

mV/¡C

1

Ratio of Change in V

ÆV

REF

ÆV

Ð2

Ð1.1

mV/V

2

Cathode Voltage

Reference Input Current

I

REF

R

0.7

1.9

µA

2

I

ÆI

REF

Over temp.

0.4

1.2

µA

2

Min I

I

K(min)

0.4

1

mA

1

Off State Leakage

I

K(off)

V

0.04

500

nA

3

V

Dynamic Output Impedance

Z

KA

f ² 1 kHz

0.15

0.2

½

1

I

*Calculating Average Temperature Coefficient (TC)

0

–10

–20

0.5

5000

0

0

–55 –25

0

25

50

75

100

125

0.06 mV/

°C

0.002%/

°C

24 ppm/

°C

∆V

REF

∆T

Temperature (

°C)

• TC in mV/

°C =

• TC in %/

°C =

∆T

A

∆T

A

X 100

∆V

V

∆V

REF

• TC in ppm/

°C =

∆T

A

V

∆V

REF

Average Temperature Coefficient