1N821-1 – 1N829A-1
*Qualified Levels:
JAN, JANTX,
JANTXV and JANS
(available on some part
numbers)
Available on
commercial
versions
6.2 & 6.55 Volt Zener Reference Diodes
Qualified per MIL-PRF-19500/159
DESCRIPTION
The popular 1N821-1 – 1N829A-1 series of temperature compensated reference diodes
provides both 6.2 V and 6.55 V nominal voltages and temperature coefficients as low as
0.0005 %/
o
C at a Zener test current of 7.5 mA. These DO-35 packaged (glass, axial leaded)
reference diodes are optionally available as RoHS compliant. This type of bonded Zener
package construction is also available in JAN, JANTX, JANTXV and JANS military
qualifications where the RoHS compliant “e3” is not an option. Microsemi also offers other
Zener Reference Diode products for a variety of voltages up to 200 V.
Important:
For the latest information, visit our website
http://www.microsemi.com.
FEATURES
•
•
•
•
•
•
•
•
JEDEC registered 1N821 – 1N829 series.
Zener impedance values of 10 ohms and 15 ohms are 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.
Internal metallurgical bond.
Double plug construction.
*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).
DO-35
(DO-204AH)
Package
Also available in:
DO-213AA MELF
(surface mount)
1N821UR-1 – 1N829AUR-1
APPLICATIONS / BENEFITS
•
•
•
•
•
•
•
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 %/ºC to 0.0005 %/ºC.
Tight reference voltage tolerances of 1%, 2%, 3%, etc, available on commercial with center nominal
value of 6.2 V by special request. (Excludes 1N826 and 1N828.)
Flexible axial-lead mounting terminals.
Non-sensitive to ESD per MIL-STD-750 method 1020.
Typical low capacitance of 100 pF or less.
MAXIMUM RATINGS
@ T
A
= +25 ºC unless otherwise specified
Parameters/Test Conditions
Junction and Storage temperature
(1)
Power Dissipation
Maximum Zener Current
Solder Pad Temperatures at 10 s
Symbol
T
J
and T
STG
P
D
I
ZM
T
SP
Value
-55 to +175
500
70
Unit
o
C
mW
mA
o
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
260
C
Notes:
1. At T
L
= 25
o
C and maximum current I
ZM
of 70 mA. For optimum voltage-temperature stability, I
Z
= 7.5
mA (less than 50 mW in dissipated power). Derate at 3.33 mW/
o
C above T
A
= +25
o
C
.
T4-LDS-0220, Rev. 2 (7/29/13)
©2013 Microsemi Corporation
Page 1 of 5
1N821-1 – 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) solderable per MIL-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: Approximately 0.2 grams.
See
Package Dimensions
on last page.
PART NOMENCLATURE
Applicable to: JAN, JANTX, JANTXV and JANS of 1N821, 1N823, 1N825, 1N827, and 1N829 only:
JAN
Reliability Level
JAN = JAN Level
JANTX = JANTX Level
JANTXV = JANTXV Level
JANS = JANS Level
Blank = Commercial
1N821
-1
Metallurgical Bond
JEDEC type number
(see
Electrical Characteristics
table)
Applicable to: commercial 1N821, 1N823, 1N825, 1N827, and 1N829 only:
1N821
JEDEC type number
(see
Electrical Characteristics
table)
Zener Impedance
A = 10 ohms
Blank = 15 ohms
A
-1
(e3)
RoHS Compliance
e3 = RoHS compliant
Blank = non-RoHS compliant
Metallurgical Bond
Applicable to: 1N822, 1N824, 1N826 and 1N828 only:
1N822
JEDEC type number
(see
Electrical Characteristics
table)
Metallurgical Bond
-1
(e3)
RoHS Compliance
e3 = RoHS compliant
Blank = non-RoHS compliant
T4-LDS-0220, Rev. 2 (7/29/13)
©2013 Microsemi Corporation
Page 2 of 5
1N821-1 – 1N829A-1
SYMBOLS & DEFINITIONS
Definition
Reverse Current: The maximum reverse (leakage) current that will flow at the specified voltage and temperature.
Regulator Current: The dc regulator current (I
Z
), at a specified test point (I
ZT
), near breakdown knee (I
ZK
).
Zener Voltage: The Zener voltage the device will exhibit at a specified current (I
Z
) in its breakdown region.
Dynamic Impedance: The small signal impedance of the diode when biased to operate in its breakdown region at a
specified rms current modulation (typically 10% of I
ZT
or I
ZK
) and superimposed on I
ZT
or I
ZK
respectively.
Symbol
I
R
I
Z
, I
ZT
, I
ZK
V
Z
Z
ZT
or Z
ZK
ELECTRICAL CHARACTERISTICS
@ 25 C (unless otherwise specified)
ZENER
VOLTAGE
V
Z
@ I
ZT
(Note 3)
ZENER
TEST
CURRENT
I
ZT
MAXIMUM
ZENER
IMPEDANCE
Z
ZT
@ I
ZT
(Note 1)
Ohms
15
10
15
15
10
15
15
10
15
15
10
15
15
10
MAXIMUM
REVERSE
CURRENT
I
R
@ 3 V
VOLTAGE
TEMPERATURE
STABILITY
(∆V
ZT
MAX)
-55
o
C to +100
o
C
(Note 2 and 3)
mV
96
96
96
48
48
48
19
19
20
9
9
10
5
5
EFFECTIVE
TEMPERATURE
COEFFICIENT
α
VZ
o
JEDEC
TYPE
NUMBER
Volts
1N821-1
1N821A-1
1N822-1†
1N823-1
1N823A-1
1N824-1†
1N825-1
1N825A-1
1N826-1
1N827-1
1N827A-1
1N828-1
1N829-1
1N829A-1
5.89-6.51
5.89-6.51
5.9-6.5
5.89-6.51
5.89-6.51
5.9-6.5
5.89-6.51
5.89-6.51
6.2-6.9
5.89-6.51
5.89-6.51
6.2-6.9
5.89-6.51
5.89-6.51
mA
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
µA
2
2
2
2
2
2
2
2
2
2
2
2
2
2
% /
o
C
0.01
0.01
0.01
0.005
0.005
0.005
0.002
0.002
0.002
0.001
0.001
0.001
0.0005
0.0005
† Double Anode: Electrical specifications apply under both bias polarities.
NOTES:
1.
2.
3.
Zener impedance is measured by superimposing 0.75 mA ac rms on 7.5 mA dc @ 25
o
C.
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.
Voltage measurements to be performed 15 seconds after application of dc current.
T4-LDS-0220, Rev. 2 (7/29/13)
©2013 Microsemi Corporation
Page 3 of 5
1N821-1 – 1N829A-1
GRAPHS
Zener Impedance I
ZT
(Ohms)
Operating Current I
ZT
(mA)
FIGURE 1
TYPICAL ZENER IMPEDANCE vs OPERATING CURRENT
Change in temperature coefficient (%/ C)
o
I
Z
– Operating Current (mA)
∆V
Z
– Change in Zener Voltage (mV)
I
Z
– Operating Current (mA)
FIGURE 2
TYPICAL CHANGE OF TEMPERATURE COEFFICIENT
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 7.5 mA.
EXAMPLE: A diode in this series is operated at a current of 7.5 mA 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 %/
o
C and -0.0056 %/
o
C.
FIGURE 3
TYPICAL CHANGE OF ZENER VOLTAGE
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.
T4-LDS-0220, Rev. 2 (7/29/13)
©2013 Microsemi Corporation
Page 4 of 5
1N821-1 – 1N829A-1
PACKAGE DIMENSIONS
Ltr
BD
BL
LD
LL
LL
1
Dimensions
Inch
Millimeters
Min
Max
Min
Max
0.055
0.090
1.40
2.29
0.120
0.200
3.05
5.08
0.018
0.022
0.46
0.56
1.000
1.500
25.40
38.10
0.050
1.27
Notes
3
3
4
NOTES:
1. Dimensions are in inches.
2. Millimeters are given for information only.
3. Package contour optional within BD and length BL. Heat slugs, if any shall be included within this cylinder but shall not
be subject to minimum limit of BD.
4. Within this zone, lead diameter may vary to allow for lead finishes and irregularities, other than heat slugs.
5. In accordance with ASME Y14.5M, diameters are equivalent to
Φx
symbology.
T4-LDS-0220, Rev. 2 (7/29/13)
©2013 Microsemi Corporation
Page 5 of 5
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