• 1N821 THRU 1N829 AVAILABLE IN
JANHC AND JANKC
PER MIL-PRF-19500/159
• MONOLITHIC TEMPERATURE COMPENSATED ZENER REFERENCE CHIPS
• ALL JUNCTIONS COMPLETELY PROTECTED WITH SILICON DIOXIDE
• ELECTRICALLY EQUIVALENT TO 1N821 THRU 1N829
• COMPATIBLE WITH ALL WIRE BONDING AND DIE ATTACH TECHNIQUES,
WITH THE EXCEPTION OF SOLDER REFLOW
MAXIMUM RATINGS
Operating Temperature: -65°C to +175°C
Storage Temperature: -65°C to +175°C
CD821
thru
CD829A
REVERSE LEAKAGE CURRENT
l
R
= 2
µ
A @ 25°C & VR = 3 Vdc
ELECTRICAL CHARACTERISTICS
@ 25°C, unless otherwise specified.
-55° TO +100°
VOLTAGE
EFFECTIVE
TEMPERATURE TEMPERATURE
STABILITY
COEFFICIENT
³V
ZT
(Note 2)
mV
96
96
48
48
19
19
20
9
9
10
5
5
% / °C
0.01
0.01
0.005
0.005
0.002
0.002
0.002
0.001
0.001
0.001
0.0005
0.0005
CDI
TYPE
NUMBER
ZENER
VOLTAGE
V
@I
ZT
ZT
ZENER
TEST
CURRENT
I
ZT
MAXIMUM
ZENER
IMPEDANCE
Z
ZT
(Note 1)
Backside is not cathode
and must be electrically isolated
T = Metallization Test Pad
VOLTS
CD821
CD821A
CD823
CD823A
CD825
CD825A
CD826
CD827
CD827A
CD828
CD829
CD829A
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
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
OHMS
15
10
15
10
15
10
15
15
10
15
15
10
DESIGN DATA
METALLIZATION:
Top: C (Cathode) ..................Al
A (Anode) ..................... Al
Back: .......................................Au
AL THICKNESS.........25,000
Å
Min
GOLD THICKNESS......4,000
Å
Min
CHIP THICKNESS.
..............10 Mils
CIRCUIT LAYOUT DATA:
Backside must be electrically
isolated.
Backside is not cathode.
For Zener operation cathode must
be operated positive with respect
to anode.
TOLERANCES:
ALL
Dimensions + 2 mils
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
6 LAKE STREET, LAWRENCE,
PHONE (978) 620-2600
WEBSITE: http://www.microsemi.com
M A S S A C H U S E T T S 01841
FAX (978) 689-0803
177
CD821
thru
CD829A
500
ZENER IMPEDANCE ZZT (OHMS)
100
50
10
5
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
OPERATING CURRENT lZT (mA)
9.0
9.5
FIGURE 4
TYPICAL CHANGE OF TEMPERATURE COEFFICIENT
WITH CHANGE IN OPERATING CURRENT
178
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