6.2 & 6.55 Volt Temperature Compensated

Surface Mount Zener Reference Diodes

Microsemi

Scottsdale Division

8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503

Page 3

Copyright

 2003

12-19-2003 REV A

SCOTTSD A L E DIVISION

1N821UR thru 1N829AUR-1

(or MLL821 thru MLL829-1)

GRAPHS

FIGURE 2

FIGURE 3

TYPICAL CHANGE OF TEMPERATURE COEFFICIENT

TYPICAL CHANGE OF ZENER VOLTAGE

WITH CHANGE IN OPERATING CURRENT.

WITH CHANGE IN OPERATING CURRENT

This curve in Figure 3 illustrates the change of diode

voltage arising from the effect of impedance. It is in effect

an exploded view of the zener operating region of the I-V

characteristic.

In conjunction with Figure 2, this curve can be used to

estimate total voltage regulation under conditions of both

varying temperature and current.

The curve shown in Figure 2 is typical of the diode series and greatly simplifies

the estimation of the Temperature Coefficient (TC) when the diode is operated at

currents other than 7.5mA.

EXAMPLE: A diode in this series is operated at a current of 7.5mA and has

specified Temperature Coefficient (TC) limits of +/-0.005%/

typical Temperature Coefficient limits for this same diode operated at a current of

6.0mA, the new TC limits (%/

At a test current of 6.0mA the change in Temperature Coefficient (TC) is

approximately –0.0006%.

0.0006%/

PACKAGE DIMENSIONS

INCHES

MILLIMETERS

DIM

MIN

MAX

MIN

MAX

A

0.063

0.067

1.60

1.70

B

0.130

0.146

3.30

3.70

C

0.016

0.022

0.41

0.55

PAD LAYOUT

INCHES

mm

A

.200

5.08

B

.055

1.40

C

.080

2.03