1N994411 -- 11NN994466BB--11 WWW.Microsemi .COM 1N941 thru 1N946B-1 11.7 Volt Temperature Compensated Zener Reference Diodes SCOTTSDALE DIVISION DESCRIPTION APPEARANCE The popular 1N941 thru 1N946B series of Zero-TC Reference Diodes DO-7 provides a selection of 11.7 V nominal voltages and temperature o (DO-204AA) coefficients 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. 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: 1N941 - 1N946B-1 WWW.Microsemi .COM 1N941 thru 1N946B-1 11.7 Volt Temperature Compensated Zener Reference Diodes SCOTTSDALE DIVISION o *ELECTRICAL CHARACTERISTICS 25 C, unless otherwise specified VOLTAGE MAXIMUM MAXIMUM TEMPERATURE EFFECTIVE ZENER ZENER JEDEC ZENER REVERSE STABILITY TEMPERATURE VOLTAGE TEST TEMPERATURE TYPE IMPEDANCE CURRENT COEFFICIENT V I CURRENT (Note 3 & 4) RANGE NUMBER Z ZT (Note 2) (Note 4) I I 8 V V (Note 1, ZT R ZT VZ Z I ZT ZT MAXIMUM 5 & 6) o o VOLTS mA OHMS A mV C %/ C 1N941 11.12-12.28 7.5 30 15 88 0 to +75 0.01 1N941A 11.12-12.28 7.5 30 15 181 -55 to +100 0.01 1N941B 11.12-12.28 7.5 30 15 239 -55 to +150 0.01 1N942 11.12-12.28 7.5 30 15 44 0 to +75 0.005 1N942A 11.12-12.28 7.5 30 15 90 -55 to +100 0.005 1N942B 11.12-12.28 7.5 30 15 120 -55 to +150 0.005 1N943 11.12-12.28 7.5 30 15 18 0 to +75 0.002 1N943A 11.12-12.28 7.5 30 15 36 -55 to +100 0.002 1N943B 11.12-12.28 7.5 30 15 47 -55 to +150 0.002 1N944 11.12-12.28 7.5 30 15 9 0 to +75 0.001 1N944A 11.12-12.28 7.5 30 15 18 -55 to +100 0.001 1N944B 11.12-12.28 7.5 30 15 24 -55 to +150 0.001 1N945 11.12-12.28 7.5 30 15 4 0 to +75 0.0005 1N945A 11.12-12.28 7.5 30 15 9 -55 to +100 0.0005 1N945B 11.12-12.28 7.5 30 15 12 -55 to +150 0.0005 1N946 11.12-12.28 7.5 30 15 1.8 0 to +75 0.0002 1N946A 11.12-12.28 7.5 30 15 3.6 -55 to +100 0.0002 1N946B 11.12-12.28 7.5 30 15 4.7 -55 to +150 0.0002 *JEDEC Registered Data. NOTES: 1. For tighter voltages tolerances, add a hyphenated suffix to the part number for desired tolerance at the end of the part number, e.g. 1N944B-2%, 1N945B-1%, 1N944B-1-1%, etc. o 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 1N941B, 1N942B, 1N943B, 1N944B, 1N945B also have military qualification to MIL-PRF-19500/157 up to the JANTXV level by adding JAN, JANTX, or JANTXV prefixes to part numbers as well as -1 suffix, e.g. JANTX1N944B-1, JANTXV1N945B-1, etc. 6. Designate Radiation Hardened devices with RH prefix instead of 1N, i.e. RH944B instead of 1N944B. 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 +/-0.002%/ C. To obtain the typical Temperature Coefficient limits for this same diode operated at a current of 6.0mA, the new o 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 0.0009%. C. The algebraic sum of +/- o o 0.002% C and 0.0009%/ C gives the new estimated limits of +0.0011%/oC and -0.0029%/oC. I Operating Current (mA) Z FIGURE 1 TYPICAL CHANGE OF TEMPERATURE COEFFICIENT WITH CHANGE IN OPERATING CURRENT. Copyright 2003 Microsemi Page 2 8-21-2003 REV A Scottsdale Division 8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503 o Change in temperature coefficient (%/ C) o Change in temperature coefficient (mV/ C)