6.2 & 6.55 Volt Temperature Compensated
Surface Mount Zener Reference Diodes
S C O T T S D A L E D I V I S I O N
1N821UR thru 1N829AUR-1
(or MLL821 thru MLL829-1)
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DESCRIPTION
APPEARANCE
The 1N821UR thru 1N829AUR-1 series of surface mount Zero-TC
Reference Diodes provides a selection of both 6.2 V and 6.55 V nominal
voltages and temperature coefficients to as low as 0.0005%/
o
C for minimal
voltage change with temperature when operated at 7.5 mA. These glass
surface mount DO-213AA (MELF) reference diodes are optionally available
with an internal-metallurgical-bond by adding a "-1" suffix. This type of
bonded Zener package construction is also available in JAN, JANTX, and
JANTXV military qualifications. Microsemi also offers numerous other
Zener Reference Diode products for a variety of other voltages up to 200 V.
DO-213AA
IMPORTANT: For the most current data, consult MICROSEMI's website:
http://www.microsemi.com
FEATURES
APPLICATIONS / BENEFITS
Surface mount equivalent of JEDEC registered
1N821 thru 1N829 series
Internal metallurgical bond option available by adding
a "-1" suffix
Reference voltage selection of 6.2 V & 6.55 V +/-5%
with further tight tolerance options at lower voltage
1N821, 823, 825, 827 and 829 also have surface
mount qualification to MIL-PRF-19500/159 by adding
the JAN, JANTX, or JANTXV prefixes to part
numbers a well as the "-1" suffix; e.g. JANTX1N829-
1, etc.
Axial-leaded equivalents also available in DO-35 or
DO-7 without the UR suffix (see separate data sheet)
including military qualifications up to JANS for DO-7
(see separate data sheet)
JANS equivalent available in DO-213AA via SCD
Provides minimal voltage changes over a broad
temperature range
For instrumentation and other circuit designs
requiring a stable voltage reference
Maximum temperature coefficient selections available
from 0.01%/C to 0.0005%/C
Tight reference voltage tolerances available with
center nominal value of 6.15 V by adding designated
tolerance such as 1%, 2%, 3%, etc. after the part
number for identification
e.g. 1N827UR-2%, 1N829AUR-1-1%, etc.
Small surface-mount footprint
Nonsensitive to ESD per MIL-STD-750 Method 1020
Typical low capacitance of 100 pF or less
MAXIMUM RATINGS
MECHANICAL AND PACKAGING
Operating Temperatures: -65
o
C to +175
o
C
Storage Temperatures: -65
o
C to +175
o
C
DC Power Dissipation: 500 mW @ T
L
= 25
o
C and
maximum current I
ZM
of 70 mA. NOTE: For
optimum voltage-temperature stability, I
Z
= 7.5 mA
(less than 50 mW in dissipated power)
Solder Temperatures: 260
o
C for 10 s (max)
CASE: Hermetically sealed glass case. DO-213AA
package
TERMINALS: Leads, tin-lead plated solderable per
MIL-STD-750, Method 2026
MARKING: Cathode band (except double anode
1N822 and 1N824)
POLARITY: Reference diode to be operated with
the banded end positive with respect to the
opposite end
TAPE & REEL option: Standard per EIA-481-B with
12 mm tape, 2000 per 7 inch reel or 5000 oer 13
inch reel (add "TR" suffix to part number)
WEIGHT: 0.04 grams.
See package dimensions on last page
Microsemi
Scottsdale Division
8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503
Page 1
Copyright
2003
12-19-2003 REV A
6.2 & 6.55 Volt Temperature Compensated
Surface Mount Zener Reference Diodes
S C O T T S D A L E D I V I S I O N
1N821UR thru 1N829AUR-1
(or MLL821 thru MLL829-1)
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*ELECTRICAL CHARACTERISTICS @ 25
o
C, unless otherwise specified
ZENER
VOLTAGE
(Note 1 and 4)
V
Z
@ I
ZT
ZENER
TEST
CURRENT
I
ZT
MAXIMUM
ZENER
IMPEDANCE
(Note 2)
Z
ZT
@ I
ZT
MAXIMUM
REVERSE
CURRENT
I
R
@ 3 V
VOLTAGE
TEMPERATURE
STABILITY
(
V
ZT
MAX)
-55
o
C to +100
o
C
(Note 3 and 4)
EFFECTIVE
TEMPERATURE
COEFFICIENT
VZ
JEDEC
TYPE NUMBER
(Notes 1, 5 & 6)
VOLTS mA OHMS A
mV
%/
o
C
1N821UR
1N821AUR
1N822UR
1N823UR
5.9 6.5
5.9 6.5
5.9 6.5
5.9 6.5
7.5
7.5
7.5
7.5
15
10
15
15
2.0
2.0
2.0
2.0
96
96
96
48
0.01
0.01
0.01
0.005
1N823AUR
1N824UR
1N825UR
1N825AUR
5.9 6.5
5.9 6.5
5.9 6.5
5.9 6.5
7.5
7.5
7.5
7.5
10
15
15
10
2.0
2.0
2.0
2.0
48
48
19
19
0.005
0.005
0.002
0.002
1N826UR
1N827UR
1N827AUR
1N828UR
6.2 6.9
5.9 6.5
5.9 6.5
6.2 6.9
7.5
7.5
7.5
7.5
15
15
10
15
2.0
2.0
2.0
2.0
20
9
9
10
0.002
0.001
0.001
0.001
1N829UR
1N829AUR
5.9 6.5
5.9 6.5
7.5
7.5
15
10
2.0
2.0
5
5
0.0005
0.0005
*JEDEC Registered Data.
Double Anode; electrical specifications apply under both bias polarities.
NOTES:
1.
Add a "-1" suffix for internal metallurgical bond. When ordering devices with tighter tolerances than specified for the V
Z
voltage nominal
of 6.15 V, add a further hyphened suffix number % to the part number for desired tolerance, e.g. 1N827UR-1-2%, 1N829UR-1-1%,
1N829AUR-1%, 1N829AUR-1-1%, etc.
2.
Zener impedance is measured by superimposing 0.75 mA ac rms on 7.5 mA dc @ 25
o
C.
3.
The maximum allowable change observed over the entire temperature range i.e., the diode voltage will not exceed the specified mV
change at any discrete temperature between the established limits.
4.
Voltage measurements to be performed 15 seconds after application of dc current.
5.
1N821UR-1, 1N823UR-1, 1N825UR-1, 1N827UR-1, and 1N829UR-1 also have qualification to MIL-PRF-19500/159 by adding the JAN,
JANTX, or JANTXV prefix to part numbers as well as the "-1" suffix; e.g. JANTX1N827UR-1, JANTXV1N829UR-1, etc.
6.
This product series has also been previously identified as the MLL821 thru MLL829A-1. This alternate name may still be used.
Microsemi
Scottsdale Division
8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503
Page 2
Copyright
2003
12-19-2003 REV A
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
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S C O T T S D A L E D I V I S I O N
1N821UR thru 1N829AUR-1
(or MLL821 thru MLL829-1)
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GRAPHS
I
Z
Operating Current (mA)
I
Z
Operating Current (mA)
Change in tempe
r
ature coefficient
(mV/
o
C)
Change in tempe
r
ature coefficient
(%/
o
C)
V
Z
Ch
ange in
Zener Voltag
e (
m
V)
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%/
o
C. To obtain the
typical Temperature Coefficient limits for this same diode operated at a current of
6.0mA, the new TC limits (%/
o
C) can be estimated using the graph in FIGURE 2.
At a test current of 6.0mA the change in Temperature Coefficient (TC) is
approximately 0.0006%.
o
C. The algebraic sum of +/-0.005%
o
C and
0.0006%/
o
C gives the new estimated limits of +0.0044%/oC and -0.0056%/oC.
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
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