T4-LDS-0220, Rev. 1 (111514) ©2011 Microsemi Corporation Page 1 of 5
1N821-1 thru 1N829A-1
Availa ble on
commercial
versions
6.2 & 6.55 Volt ZENER REFERENCE DIODES
Qualified per MIL-PRF-19500/159
*Qualified Levels:
JAN, JANTX,
JANTXV and JANS
(available on some part
numbers)
DESCRIPTION
The popular 1N821-1 thru 1N 82 9A-1 series of 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
axial-leaded DO-35 reference diodes are optionally available with an internal-metallurgical-
bond as well as RoHS compliant version. This type of bonded Zener package construction is
also available in JAN, JANTX, and JANTXV military qualifications where the RoHS compliant
“e3” is not an option. Microsemi also offers numerous other Zener Reference Diode products
for a variety of other voltages up to 200 V.
DO-35 (DO-204AH)
Package
Also available in:
DO-213AA MELF
(surface mount)
1N821UR-1 – 1N829AUR-1
Important: For the latest information, visit our website http://www.microsemi.com.
FEATURES
• JEDEC registered 1N821 thru 1N829 series.
• Lowered Zener impedance option available.
• Reference voltage selection of 6.2 V & 6.55 V +/-5% with further tight tolerance options on
commercial at lower voltage. (Excludes 1N826 and 1N828.)
• Temperature compensated.
• Interna l meta llurg ic al bond.
• Double plug cons tr uc tion .
• *JAN, JANTX, JANTXV and JANS qualification per MIL-PRF-19500/159 available on 1N821-1, 823-
1, 825-1, 827-1 and 829-1.
• RoHS compliant versions available (commercial grade only).
APPLICA TIONS / BENEFITS
• Provides min im al volt age cha n ges over a broad temperature range.
• For instrumentation and other circuit designs requiring a stable voltage reference.
• Maximum temperature coefficient selections available from 0.01%/ºC to 0.0005%/ºC.
• Tight reference voltage tolerances available on commerci al with center nominal value of 6.2 V by
adding designated tolerance such as 1%, 2%, 3%, etc. after the part number for identification.
(Excludes 1N826 and 1N828.)
• Flexible axial-lea d mount ing t e rmina ls.
• Non-sensitive to ESD per MIL-STD-750 method 1020.
• Typical low capacitance of 100 pF or less.
MAXIMUM RATINGS
MSC – Lawrence
6 Lake Street,
Lawrence, MA 01841
1-800-446-1158
Tel: (978) 620-2600
Fax: (978) 689-0803
MSC – Ireland
Gort Road Business Park,
Ennis, Co. Clare, Ireland
Tel: +353 (0) 65 6840044
Fax: +353 (0) 65 6822298
Website:
www.microsemi.com
Parameters/Test Conditions
Symbol
Value
Unit
Junction and Storage temperature
TJ and TSTG
-55 to +175
oC
Power Dissipation (1)
PD
500
mW
Maximum Zener Current
IZM
70
mA
Solder Pad Temperatures at 10 s
TSP
260
oC
Notes: 1. @ TL = 25 oC and maximum current IZM of 70 mA. For optimum voltage-temperature stability, IZ = 7.5
mA (less than 50 mW in dissipated power). Derate at 3.33 mW/oC above TA = +25 oC.
T4-LDS-0220, Rev. 1 (111514) ©2011 Microsemi Corporation Page 2 of 5
1N821-1 thru 1N829A-1
MECHANICAL and PACKAGING
• CASE: Hermetically sealed glass case. DO-35 (DO-204AH) package.
• TERMINALS: Tin-lead (military) or RoHS compliant annealed matte-tin plating (commercial grade only) so ldera ble per M I L-STD-
750, method 2026.
• MARKING: Part number and cathode band (except double anode 1N822-1 and 1N824-1).
• POLARITY: Reference diode to be operated with the banded end positive with respect to the opposite end.
• TAPE & REEL option: Standard per EIA-296 (add “TR” suffix to part number). Consult factory for quantities.
• WEIGHT: 0.2 gra ms.
• See Package Dimensions on last page.
PART NOMENCLATURE
Applicable to: JAN, JANTX, JANTXV and JANS of 1N821, 1N823, 1N825, 1N827, and 1N829 only:
JAN 1N821 -1
JAN = JAN Level
JANTX = JANTX Level
JANTXV = JANTXV Level
JANS = JANS Level
Metallurgical Bond
JEDEC type number
(see Electrical Characteristics
table)
Applicable to: commercial 1N821, 1N823, 1N825, 1N827, and 1N829 only:
1N821 A -1 -1% (e3)
(see Electrical Characteristics
table)
Zener Impedance
A = 10 ohms
Blank = 15 ohms
Metallurgical Bond
RoHS Compli ance
e3 = RoHS compliant (available
on commercial grade only)
Blank = non-RoHS compliant
Tighter voltage tolerance
1%
2%
3%
Applicable to: 1N822 and 1 N824 only:
1N822 -1 -1% (e3)
(see Electrical Characteristics
table)
Metallurgical Bond
RoHS Compli ance
e3 = RoHS compliant (available
on commercial grade only)
Blank = non-RoHS compliant
Tighter voltage tolerance
1%
2%
3%
Continued on next page.