• 1N821-1,1N823-1,1N825-1,1N827-1 AND 1N829-1 AVAILABLE IN
JAN
,
JANTX, JANTXV
AND JANS
PER MIL-PRF-19500/159
• TEMPERATURE COMPENSATED ZENER REFERENCE DIODES
• METALLURGICALLY BONDED
• DOUBLE PLUG CONSTRUCTION
1N821 thru 1N829A
and
1N821-1 thru 1N829-1
MAXIMUM RATINGS
Operating Temperature: -65°C to +175°C
Storage Temperature: -65°C to +175°C
DC Power Dissipation: 500mW @ +50°C
Power Derating: 4 mW / °C above +50°C
REVERSE LEAKAGE CURRENT
l
R
= 2
µ
A @ 25°C & V
R
= 3 Vdc
ELECTRICAL CHARACTERISTICS
@ 25°C, unless otherwise specified.
JEDEC
TYPE
NUMBER
ZENER
VOLTAGE
vz @ I
ZT
ZENER
TEST
CURRENT
I
ZT
MAXIMUM
ZENER
IMPEDANCE
(Note 1)
Z
ZT
VOLTAGE
TEMPERATURE
STABILITY
∆V
ZT
-55° to +100°
(Note 2)
EFFECTIVE
TEMPERATURE
COEFFICIENT
FIGURE 1
% / °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
VOLTS
1N821
1N821A
1N822
†
1N823
1N823A
1N824
†
1N825
1N825A
1N826
1N827
1N827A
1N828
1N829
1N829A
5.9—6.5
5.9—6.5
5.9—6.5
5.9—6.5
5.9—6.5
5.9—6.5
5.9—6.5
5.9—6.5
6.2—6.9
5.9—6.5
5.9—6.5
6.2—6.9
5.9—6.5
5.9—6.5
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
OHMS
15
10
15
15
10
15
15
10
15
15
10
15
15
10
mV
96
96
96
48
48
48
19
19
20
9
9
10
5
5
DESIGN DATA
CASE:
Hermetically sealed glass
case. DO – 35 outline.
LEAD MATERIAL:
Copper clad steel.
LEAD FINISH:
Tin / Lead
POLARITY:
Diode to be operated with
the banded (cathode) end positive.
MOUNTING POSITION:
Any.
† Double Anode: Electrical Specifications Apply Under Both Bias Polarities.
NOTE 1
Zener impedance is derived by superimposing on lZT A 60Hz rms a.c. current equal
to 10% of lZT.
The maximum allowable change observed over the entire temperature range i.e.,
the diode voltage will not exceed the specified mV at any discrete temperature
between the established limits, per JEDEC standard No. 5.
NOTE 2
22 COREY STREET, MELROSE, MASSACHUSETTS 02176
PHONE (781) 665-1071
FAX (781) 665-7379
WEBSITE: http://www.cdi-diodes.com
E-mail: mail@cdi-diodes.com
1N821
thru
INCLUDING -1 VERSIONS
1N829A
500
Pd, Rated Power
Dissipation (mW)
600
500
400
300
200
100
0
25
50
100
150
175
ZENER IMPEDANCE ZZT (OHMS)
100
50
10
5
TL, Lead temperature (C°) 3/8” from body
FIGURE 2
POWER DERATING CURVE
1
5
6
7
8
9
10
OPERATING CURRENT lZT (mA)
FIGURE 3
ZENER IMPEDANCE
VS.
OPERATING CURRENT
CHANGE IN TEMPERATURE COEFFICIENT ( %/°C)
+.0010
+.0005
0
-.0005
-.0010
5.5
6.0
6.5
7.0
7.5
8.0
8.5
9.0
9.5
OPERATING CURRENT lZT (mA)
FIGURE 4
TYPICAL CHANGE OF TEMPERATURE
COEFFICIENT WITH CHANGE IN
OPERATING CURRENT
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