6.2 & 6.55 Volt Temperature Compensated
Surface Mount Zener Reference Diodes
WWW.Microsemi .COM
SCOTTSDALE DIVISION
1N821UR thru 1N829AUR-1, e3
(or MLL821 thru MLL829-1, e3)
1N821UR thru
1N829AUR-1
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%/oC 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 as well as RoHS
Compliant with an e3 suffix. This type of bonded Zener package
construction is also available in JAN, JANTX, and JANTXV military
qualifications (RoHS Compliant option not applicable). 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 APPLIC ATIONS / BENE FITS
• 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-PR F - 19500/159 by adding
the JAN, JANTX, or JANTXV prefixes to part
numbers a well as the “-1” suffix; e.g. JANTX1N829-
1, etc.
• RoHS Compliant devices avai lable by adding an e3
suffix (not applicable to military)
• Axial-leaded e quivalents also availabl e 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 sel ection s available
from 0.01%/ºC to 0.0005%/ºC
• Tight reference voltage tolerances ava ilable 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
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Microsemi
Scottsdale Division Page 1
MAXIMUM RAT ING S MECHANICAL AND PACKAGING
• Operating Temperatures: -65oC to +175oC
• Storage Temperatures: -65oC to +175oC
• DC Power Dissipation: 500 mW @ TL = 25oC and
maximum current IZM of 70 mA. NOTE: For
optimum voltage-temperature stability, IZ = 7.5 mA
(less than 50 mW in dissipated power)
• Solder Temperatures: 260oC for 10 s (max)
• CASE: Hermetically sealed glass case. DO-213AA
package
• TERMINALS: Leads, Tin-Lead (military) or RoHS
Compliant annealed matte Tin plating 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 l ast page
Copyright © 2005
7-18-2005 REV B 8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503
6.2 & 6.55 Volt Temperature Compensated
Surface Mount Zener Reference Diodes
WWW.Microsemi .COM
SCOTTSDALE DIVISION
1N821UR thru 1N829AUR-1, e3
(or MLL821 thru MLL829-1, e3)
1N821UR thru
1N829AUR-1
*ELECTRICAL CHARACTERISTICS @ 25oC, unless otherwise specified
ZENER
VOLTAGE
(Note 1 and 4)
VZ @ IZT
ZENER
TEST
CURRENT
IZT
MAXIMUM
ZENER
IMPEDANCE
(Note 2)
ZZT @ IZT
MAXIMUM
REVERSE
CURRENT
IR @ 3 V
VOLTAGE
TEMPERATURE
STABILITY
(ΔVZT MAX)
-55oC to +100oC
(Note 3 and 4)
EFFECTIVE
TEMPERATURE
COEFFICIENT
αVZ
JEDEC
TYPE NUMBER
(Notes 1, 5 & 6)
VOLTS mA OHMS μA mV %/oC
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 spe cifications 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 VZ 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 @ 25oC.
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.
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Microsemi
Scottsdale Division Page 2
Copyright © 2005
7-18-2005 REV B 8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503
6.2 & 6.55 Volt Temperature Compensated
Surface Mount Zener Reference Diodes
WWW.Microsemi .COM
SCOTTSDALE DIVISION
1N821UR thru 1N829AUR-1, e3
(or MLL821 thru MLL829-1, e3)
1N821UR thru
1N829AUR-1
GRAPHS
IZ – Operating Current (mA) IZ – Operating Current (mA)
Change in temperature coefficient (mV/oC)
Change in temperature coefficient (%/oC)
ΔVZ – Change in Zener Voltage (mV)
FIGURE 2 FIGURE 3
TYPICAL CHANGE OF TEMPERATURE COEFFICIENT TYPICAL CHANGE OF ZENER VOLTAGE
WITH CHANGE IN OPERATING CURRENT. WITH CHANGE IN OPERATING 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.
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 con j unction wi th Figure 2, this cu rve can be used to
estimate total voltage regulation under conditions of both
varying temperature and current.
EXAMPLE: A diode in this series is operated at a current of 7.5mA and has
specified Temperature Coefficient (TC) limits of +/-0.005% /oC. To obtain the
typical Temperature Coefficient limits for this same diode operated at a current of
6.0mA, the new TC limits (%/oC) 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%.oC. The algebraic sum of +/-0.005%oC and –
0.0006%/oC gives the new estimated limits of +0.0044%/oC and -0.0056%/oC.
PACKAGE DIMEN SIONS
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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Microsemi
Scottsdale Division Page 3
Copyright © 2005
7-18-2005 REV B 8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503
