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1N935 - 1N940B-1, e3
1N935 thru 1N940B-1, e3
9.0 Volt Temperature Compensated Zener
Reference Diodes
SCOTTSDALE DIVISION
DESCRIPTION APPEARANCE
The popular 1N935 thru 1N940B series of Zero-TC Reference Diodes
DO-7
provides a selection of 9.0 V nominal voltages and temperature coefficients
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(DO-204AA)
to as low as 0.0002%/ 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, and JANTXV military qualifications. For
commercial applications it is also available as RoHS Compliant with an e3
suffix (not applicable to military). Microsemi also offers numerous other
Zener Reference Diode products for a variety of other voltages from 6.2 V
to 200 V.
IMPORTANT: For the most current data, consult MICROSEMIs website: WWW.Microsemi .COM
1N935 - 1N940B-1, e3
1N935 thru 1N940B-1, e3
9.0 Volt Temperature Compensated Zener
Reference Diodes
SCOTTSDALE DIVISION
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*ELECTRICAL CHARACTERISTICS @ 25 C, unless otherwise specified
VOLTAGE
ZENER MAXIMUM
MAXIMUM TEMPERATURE EFFECTIVE
ZENER
JEDEC
VOLTAGE ZENER
REVERSE STABILITY TEMPERATURE
TEST TEMPERATURE
TYPE
V @ I IMPEDANCE
Z ZT
CURRENT
CURRENT (Notes 3 & 4) RANGE COEFFICIENT
NUMBERS
(Notes (Note 2)
I I @ 6 V V
(Notes ZT R ZT VZ
1, 4 & 5) Z @ I
ZT ZT
MAXIMUM
1 & 5)
o o
VOLTS mA OHMS A mV C %/ C
1N935 8.55-9.45 7.5 20 10 67 0 to +75 0.01
1N935A 8.55-9.45 7.5 20 10 139 -55 to +100 0.01
1N935B
8.55-9.45 7.5 20 10 184 -55 to +150 0.01
1N936 8.55-9.45 7.5 20 10 33 0 to +75 0.005
1N936A 8.55-9.45 7.5 20 10 69 -55 to +100 0.005
1N936B 8.55-9.45 7.5 20 10 92 -55 to +150 0.005
1N937 8.55-9.45 7.5 20 10 13 0 to +75 0.002
1N937A 8.55-9.45 7.5 20 10 27 -55 to +100 0.002
1N937B 8.55-9.45 7.5 20 10 37 -55 to +150 0.002
1N938 8.55-9.45 7.5 20 10 6 0 to +75 0.001
1N938A 8.55-9.45 7.5 20 10 13 -55 to +100 0.001
1N938B 8.55-9.45 7.5 20 10 18 -55 to +150 0.001
1N939 8.55-9.45 7.5 20 10 3 0 to +75 0.0005
1N939A 8.55-9.45 7.5 20 10 7 -55 to +100 0.0005
1N939B 8.55-9.45 7.5 20 10 9 -55 to +150 0.0005
1N940 8.55-9.45 7.5 20 10 1.3 0 to +75 0.0002
1N940A 8.55-9.45 7.5 20 10 2.7 -55 to +100 0.0002
1N940B 8.55-9.45 7.5 20 10 3.7 -55 to +150 0.0002
*JEDEC Registered Data.
NOTES: 1. When ordering devices with tighter tolerances than specified, use a nominal voltage of 9.2V and add a hyphenated suffix
to the part number for desired tolerance at the end of the part number, e.g. 1N938B-2%, 1N939B-1%, 1N939B-1-1%, etc.
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2. Measured by superimposing 0.75 mA ac rms on 7.5 mA dc @ 25 C.
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. The 1N935B, 937B, 938B, 939B, 940B also have military qualification to MIL-PRF-19500/156 up to the JANTXV level by
adding JAN, JANTX, or JANTXV prefixes to part numbers as well as -1 suffix, e.g. JANTX1N938B-1, etc.
6. Designate Radiation Hardened devices with RH prefix instead of IN, i.e. RH938A instead of 1N938A.
GRAPHS
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 new TC limits
o
(%/ C) can be estimated using the graph in FIGURE 1.
At a test current of 6.0mA the change in Temperature Coefficient
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(TC) is approximately 0.0009%. C. The algebraic sum of +/-
o o
C and 0.0009%/ C gives the new estimated limits of
0.005%
+0.0041%/oC and -0.0059%/oC.
I Operating Current (mA)
Z
FIGURE 1
TYPICAL CHANGE OF TEMPERATURE COEFFICIENT
WITH CHANGE IN OPERATING CURRENT.
Copyright 2005
Microsemi
Page 2
7-18-2005 REV B
Scottsdale Division
8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503
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Change in temperature coefficient (%/ C)
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Change in temperature coefficient (mV/ C)