1N821AUR-1 Microsemi Corporation, 1N821AUR-1 Datasheet - Page 3

• Manufacturer Part Number: 1N821AUR-1
• Description: 6.2 & 6.55 Volt Temperature Compensated Surface Mount Zener Reference Diodes
• Manufacturer: Microsemi Corporation

Copyright © 2005
7-18-2005 REV B
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%/
TYPICAL CHANGE OF TEMPERATURE COEFFICIENT
o
C gives the new estimated limits of +0.0044%/oC and -0.0056%/oC.
WITH CHANGE IN OPERATING CURRENT.
8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, [phone], Fax: [phone]
S C O T T S D A L E D I V I S I O N
I
Z
o
C. The algebraic sum of +/-0.005%
– Operating Current (mA)
o
C) can be estimated using the graph in FIGURE 2.
FIGURE 2
DIM
A
B
C
0.063
0.130
0.016
MIN
INCHES
0.067
0.146
0.022
MAX
o
PACKAGE DIMENSIONS
C. To obtain the
o
Scottsdale Division
C and –
Microsemi
1.60
3.30
0.41
MILLIMETERS
MIN
GRAPHS
1.70
3.70
0.55
MAX
6.2 & 6.55 Volt Temperature Compensated
Surface Mount Zener Reference Diodes
1N821UR thru 1N829AUR-1, e3
(or MLL821 thru MLL829-1, e3)
WITH CHANGE IN OPERATING CURRENT
TYPICAL CHANGE OF ZENER VOLTAGE
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.
A
B
C
INCHES
.200
.055
.080
I
Z
PAD LAYOUT
– Operating Current (mA)
FIGURE 3
5.08
1.40
2.03
mm
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