1N821, A, -1 thru 1N829, A, -1 DO-7
6.2 & 6.55 Volt Temperature Compensated
Zener Reference Diodes
SCOTTSDALE DIVISION
DESCRIPTION
The popular 1N821 thru 1N829 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%/
o
C for minimal voltage
change with temperature when operated at 7.5 mA. These glass axial-
leaded DO-7 reference diodes are also available in JAN, JANTX, JANTXV,
and JANS military qualifications. Microsemi also offers numerous other
Zener Reference Diode products for a variety of other voltages up to 200 V.
APPEARANCE
WWW .
Microsemi
.C
OM
DO-7
(DO-204AA)
IMPORTANT:
For the most current data, consult
MICROSEMI’s
website:
http://www.microsemi.com
FEATURES
•
•
•
•
JEDEC registered 1N821 thru 1N829 series
Internal metallurgical bonds
Zener Voltage selection of 6.2V and 6.55V
1N821, 823, 825, 827 and 829 also have
military qualification to MIL-PRF-19500/159 up
to the JANS level by adding JAN, JANTX,
JANTXV, or JANS prefixes to part numbers a
well as the “-1” suffix, e.g. JANTX1N829-1, etc.
Military surface mount equivalents also
available in DO-213AA with UR-1 suffix and
JAN, JANTX, or JANTXV prefix, e.g.
JANTX1N829UR-1 (see separate data sheet)
Also available in DO-35 package (see separate
data sheet)
•
APPLICATIONS / BENEFITS
Provides minimal voltage changes over a broad
temperature range for instrumentation and
other circuit designs requiring a voltage
reference
Temperature coefficient selections available
from 0.01%/ºC to 0.0005%/ºC
Tight voltage tolerances with nominal voltage of
6.35 V available by adding tolerance 1%, 2%,
3%, etc. after the part number for identification
e.g. 1N827 2%, 1N829A 1%, etc
Flexible axial-lead mounting terminals
Nonsensitive to ESD per MIL-STD-750 Method
1020
•
•
•
•
•
•
MAXIMUM RATINGS
•
•
Operating & StorageTemperature: -65
o
C to
+175
o
C
DC Power Dissipation: 500 mW @ T
L
= 25
o
C
NOTE: For optimum voltage-temperature
stability, I
Z
= 7.5 mA (less than 50 mW in
dissipated power)
Solder temperatures: 260
o
C for 10 s
(maximum)
•
•
•
•
MECHANICAL AND PACKAGING
CASE: Hermetically sealed glass case with
DO-7 (DO-204AA) package
TERMINALS: Leads, tin-lead plated solderable
per MIL-STD-750, Method 2026
MARKING: Part number and 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-296
(add “TR” suffix to part number)
WEIGHT: 0.2 grams.
See package dimensions on last page
•
1N821, A, -1 thru
1N829, A, -1 DO-7
•
•
•
Copyright
2003
7-30-2003 REV A
Microsemi
Scottsdale Division
8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503
Page 1
1N821, A, -1 thru 1N829, A, -1 DO-7
6.2 & 6.55 Volt Temperature Compensated
Zener Reference Diodes
SCOTTSDALE DIVISION
*ELECTRICAL CHARACTERISTICS @ 25
o
C, unless otherwise specified
MAXIMUM
ZENER
IMPEDANCE
(Note 2)
Z
ZT
MAXIMUM
REVERSE
CURRENT
I
R
@ 3 V
VOLTAGE
TEMPERATURE
STABILITY
(∆V
ZT
MAX)
o
o
-55 to +100
(Note 3 and 4)
WWW .
Microsemi
.C
OM
JEDEC
TYPE NUMBER
ZENER
VOLTAGE
(Note 1 and 4)
V
Z
@ I
ZT
ZENER
TEST
CURRENT
I
ZT
EFFECTIVE
TEMPERATURE
COEFFICIENT
α
VZ
o
1N821
1N821A
1N822†
1N823
1N823A
1N824†
1N825
1N825A
1N826
1N827
1N827A
1N828
1N829
1N829A
VOLTS
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
µA
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
mV
96
96
96
48
48
48
19
19
20
9
9
10
5
5
%/ 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
*JEDEC Registered Data.
†Double Anode; electrical specifications apply under both bias polarities.
NOTES:
1.
2.
3.
4.
5.
When ordering devices with tighter tolerances than specified, use a nominal V
Z
voltage of 6.2V.
o
Zener impedance measured by superimposing 0.75 mA ac rms on 7.5 mA dc @ 25 C.
The maximum allowable change observed over the entire temperature range i.e., the diode voltage will not exceed the
specified mV change at discrete temperature between the established limits.
Voltage measurements to be performed 15 seconds after application of dc current.
Designate Radiation Hardened devices with “RH” prefix instead of “1N”, i.e., RH829A instead of 1N829A.
GRAPHS
Change in temperature coefficient (%/ C)
Change in temperature coefficient (mV/ C)
o
The curve shown in Figure 1 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.
EXAMPLE: A diode in this series is operated at a current of
7.5mA and has specified Temperature Coefficient (TC) limits of
o
+/-0.005%/ C. To obtain the typical Temperature Coefficient
limits for this same diode operated at a current of 6.0mA, the
o
new TC limits (%/ C) can be estimated using the graph in
FIGURE 1.
At a test current of 6.0mA the change in Temperature Coefficient
o
(TC) is approximately –0.0006%. C. The algebraic sum of +/-
o
o
0.005% C and –0.0006%/ C gives the estimated limits of
o
o
+0.0044%/ C and -0.0056%/ C.
o
1N821, A, -1 thru
1N829, A, -1 DO-7
FIGURE 1
TYPICAL CHANGE OF TEMPERATURE COEFFICIENT
WITH CHANGE IN OPERATING CURRENT.
Copyright
2003
7-30-2003 REV A
Microsemi
Scottsdale Division
8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503
Page 2
1N821, A, -1 thru 1N829, A, -1 DO-7
6.2 & 6.55 Volt Temperature Compensated
Zener Reference Diodes
SCOTTSDALE DIVISION
WWW .
Microsemi
.C
OM
∆
V
Z
– Change in Zener Voltage (mV)
This curve in Figure 2 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 1, this curve can be
used to estimate total voltage regulation under
conditions of both varying temperature and
current.
FIGURE 2
TYPICAL CHANGE OF ZENER VOLTAGE WITH
CHANGE IN OPERATING CURRENT
DIMENSIONS
I
Z
– Operating Current (mA)
All dimensions in INCH
mm
1N821, A, -1 thru
1N829, A, -1 DO-7
Copyright
2003
7-30-2003 REV A
Microsemi
Scottsdale Division
8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503
Page 3
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