6.2 & 6.55 Volt Temperature Compensated
Zener Reference Diodes
Microsemi
Scottsdale Division
8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503
Page 1
Copyright 2003
10-27-2003 REV C
WWW.Microsemi .COM
SCOTTSDALE DIVISION
1N821 thru 1N829A-1 DO-35
1N821, A, -1 thru
1N829A-1 DO-35
hru
1N829A-1 DO-35
DESCRIPTION APPEARANCE
The popular 1N821 thru 1N829A 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 by adding a “-1” suffix. This type of bonded Zener
package construction is also available in JAN, JANTX, and JANTXV
military qualifications. Microsemi also offers numerous other Zener
Reference Diode products for a variety of other voltages up to 200 V.
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
FEATURES APPLICATIONS / BENEFITS
• JEDEC registered 1N821 thru 1N829 series
• Internal metallurgical bond option available by adding
a “-1” suffix
• Reference voltage selection of 6.2 V & 6.55 V +/-5%
with further tight tolerance options at lower voltage
• 1N821, 823, 825, 827 and 829 also have
qualification to MIL-PRF-19500/159 by adding the
JAN, JANTX, or JANTXV prefixes to part numbers a
well as the “-1” suffix; e.g. JANTX1N829-1, etc.
• Military surface mount equivalents also available in
DO-213AA by adding UR-1 suffix and the JAN,
JANTX, and JANTXV prefix, e.g. JANTX1N829UR-1
(see separate data sheet)
• Also available in DO-7 package including military
qualifications up to JANS (see separate data sheet)
• JANS equivalent available in DO-35 via SCD
• 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 available with
center nominal value of 6.15 V by adding designated
tolerance such as 1%, 2%, 3%, etc. after the part
number for identification
e.g. 1N827-2%, 1N829A-1-1%, 1N829-1-1%, etc.
• Flexible axial-lead mounting terminals
• Nonsensitive to ESD per MIL-STD-750 Method 1020
• Typical low capacitance of 100 pF or less
MAXIMUM RATINGS MECHANICAL AND PACKAGING
• Operating Temperatures: -65oC to +175oC
• Storage Temperatures: -65oC to +175oC
• DC Power Dissipation: 500 mW @ TL = 25oC and
maximum current IZM of 70 mA. NOTE: For
optimum voltage-temperature stability, IZ = 7.5 mA
(less than 50 mW in dissipated power)
• Solder Temperatures: 260oC for 10 s (max)
• CASE: Hermetically sealed glass case. DO-35
(DO-204AH) 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
DO-35
(DO-204AH)
6.2 & 6.55 Volt Temperature Compensated
Zener Reference Diodes
SCOTTSDALE DIVISION
1N821 thru 1N829A-1 DO-35
WWW.Microsemi .COM 1N821, A, -1 thru
1N829A-1 DO-35
*ELECTRICAL CHARACTERISTICS @ 25oC, unless otherwise specified
ZENER
VOLTAGE
(Note 1 and 4)
VZ @ IZT
ZENER
TEST
CURRENT
IZT
MAXIMUM
ZENER
IMPEDANCE
(Note 2)
ZZT @ IZT
MAXIMUM
REVERSE
CURRENT
IR @ 3 V
VOLTAGE
TEMPERATURE
STABILITY
(∆VZT MAX)
-55oC to +100oC
(Note 3 and 4)
EFFECTIVE
TEMPERATURE
COEFFICIENT
αVZ
JEDEC
TYPE NUMBER
(Note 1 & 5)
VOLTS mA OHMS µA mV %/oC
1N821
1N821A
1N822†
1N823
5.9 – 6.5
5.9 – 6.5
5.9 – 6.5
5.9 – 6.5
7.5
7.5
7.5
7.5
15
10
15
15
2.0
2.0
2.0
2.0
96
96
96
48
0.01
0.01
0.01
0.005
1N823A
1N824†
1N825
1N825A
5.9 – 6.5
5.9 – 6.5
5.9 – 6.5
5.9 – 6.5
7.5
7.5
7.5
7.5
10
15
15
10
2.0
2.0
2.0
2.0
48
48
19
19
0.005
0.005
0.002
0.002
1N826
1N827
1N827A
1N828
6.2 – 6.9
5.9 – 6.5
5.9 – 6.5
6.2 – 6.9
7.5
7.5
7.5
7.5
15
15
10
15
2.0
2.0
2.0
2.0
20
9
9
10
0.002
0.001
0.001
0.001
1N829
1N829A
5.9 – 6.5
5.9 – 6.5
7.5
7.5
15
10
2.0
2.0
5
5
0.0005
0.0005
*JEDEC Registered Data.
†Double Anode; electrical specifications apply under both bias polarities.
NOTES:
1. Add a “-1” suffix for internal metallurgical bond. When ordering devices with tighter tolerances than specified for the VZ
voltage nominal of 6.15 V, add a hyphened suffix to the part number for desired tolerance, e.g. 1N827-1-2%, 1N829-1-1%,
1N829A-1%, 1N829A-1-1%, etc.
2. Zener impedance is measured by superimposing 0.75 mA ac rms on 7.5 mA dc @ 25oC.
3. 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.
4. Voltage measurements to be performed 15 seconds after application of dc current.
5. 1N821, 1N823, 1N825, 1N827, and 1N829 also have qualification to MIL-PRF-19500/159 by adding the JAN, JANTX, or
JANTXV prefix to part numbers as well as the “-1” suffix; e.g. JANTX1N827-1, JANTXV1N829-1, etc.
Microsemi
Scottsdale Division
8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503
Page 2
Copyright 2003
10-27-2003 REV C
6.2 & 6.55 Volt Temperature Compensated
Zener Reference Diodes
Microsemi
Scottsdale Division
8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503
Page 3
Copyright 2003
10-27-2003 REV C
WWW.Microsemi .COM
SCOTTSDALE DIVISION
1N821 thru 1N829A-1 DO-35
1N821, A, -1 thru
1N829A-1 DO-35
hru
1N829A-1 DO-35
GRAPHS
IZ – Operating Current (mA) IZ – Operating Current (mA)
Change in temperature coefficient (mV/oC)
Change in temperature coefficient (%/oC)
∆VZ – Change in Zener Voltage (mV)
FIGURE 2 FIGURE 3
TYPICAL CHANGE OF TEMPERATURE COEFFICIENT TYPICAL CHANGE OF ZENER VOLTAGE
WITH CHANGE IN OPERATING CURRENT. 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 effec
t
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.
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 7.5mA.
EXAMPLE: A diode in this series is operated at a current of 7.5mA and has
specified Temperature Coefficient (TC) limits of +/-0.005%/oC. To obtain the
typical Temperature Coefficient limits for this same diode operated at a current of
6.0mA, the new TC limits (%/oC) 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%.oC. The algebraic sum of +/-0.005%oC and –
0.0006%/oC gives the new estimated limits of +0.0044%/oC and -0.0056%/oC.
DIMENSIONS
All dimensions in INCH
mm
