 |
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
| Datasheet File OCR Text: |
| DISCRETE SEMICONDUCTORS DATA SHEET halfpage M3D050 1N821 to 1N829 1N821A to 1N829A Voltage reference diodes Product specification Supersedes data of March 1991 1996 Mar 20 Philips Semiconductors Product specification Voltage reference diodes FEATURES * Temperature compensated * Reference voltage range: 5.89 to 6.51 V (typ. 6.20 V) * Low temperature coefficient range: max. 0.0005 to 0.01 %/K. k handbook, halfpage 1N821 to 1N829 1N821A to 1N829A DESCRIPTION Voltage reference diode in a hermetically-sealed SOD68 (DO-34) glass package. a MAM216 APPLICATION * Voltage reference sources in measuring instruments such as digital voltmeters. Fig.1 Simplified outline (SOD68; DO-34) and symbol. LIMITING VALUES In accordance with the Absolute Maximum Rating System (IEC 134). SYMBOL IZ Ptot Tstg Tj Tamb PARAMETER working current total power dissipation storage temperature junction temperature operating ambient temperature Tamb = 50 C CONDITIONS MIN. - - -65 - -55 MAX. 50 400 +200 200 +100 UNIT mA mW C C C 1996 Mar 20 2 Philips Semiconductors Product specification Voltage reference diodes ELECTRICAL CHARACTERISTICS Tj = 25 C unless otherwise specified. SYMBOL Vref Vref PARAMETER reference voltage reference voltage excursion 1N821; 1N821A 1N823; 1N823A 1N825; 1N825A 1N827; 1N827A 1N829; 1N829A SZ temperature coefficient 1N821; 1N821A 1N823; 1N823A 1N825; 1N825A 1N827; 1N827A 1N829; 1N829A rdif differential resistance 1N821 to 1N829 1N821A to 1N829A Notes IZ = 7.5 mA; see Fig.4 - - IZ = 7.5 mA: see Fig.3; notes 1 and 2 CONDITIONS IZ =7.5 mA IZ =7.5 mA; test points for Tamb: -55; +25; +75; +100 C; see Fig.2; notes 1 and 2 MIN. 5.89 - - - - - - - - - - 1N821 to 1N829 1N821A to 1N829A TYP. 6.20 - - - - - - - - - - - - MAX. 6.51 96 48 19 9 5 0.01 0.005 0.002 0.001 V UNIT mV mV mV mV mV %/K %/K %/K %/K 0.0005 %/K 15 10 1. The quoted values of Vref are based on a constant current IZ. Two factors can cause Vref to change, namely the differential resistance rdif and the temperature coefficient SZ. a) As the max. rdif of the device can be 15 , a change of 0.01 mA in the current through the reference diode will result in a Vref of 0.01 mA x 15 = 0.15 mV. This level of Vref is not significant on a 1N821 (Vref < 96 mV), it is however very significant on a 1N829 (Vref < 5 mV). b) The temperature coefficient of the reference voltage SZ is a function of IZ. Reference diodes are classified at the specified test current and the SZ of the reference diode will be different at different levels of IZ. The absolute value of IZ is important, however, the stability of IZ, once the level has been set, is far more significant. This applies particularly to the 1N829. The effect of the stability of IZ on SZ is shown in Fig.3. 2. All reference diodes are characterized by the `box method'. This guarantees a maximum voltage excursion (Vref) over the specified temperature range, at the specified test current (IZ), verified by tests at indicated temperature points within the range. VZ is measured and recorded at each temperature specified. The Vref between the highest and lowest values must not exceed the maximum Vref given. Therefore the temperature coefficient is only given as V ref1 - V ref2 100 a reference. It may be derived from: S Z = ------------------------------------- x ------------------- %/K T amb2 - T amb1 V ref nom THERMAL CHARACTERISTICS SYMBOL Rth j-tp Rth j-a PARAMETER thermal resistance from junction to tie-point thermal resistance from junction to ambient CONDITIONS 8 mm from the body lead length 10 mm VALUE 300 375 UNIT K/W K/W 1996 Mar 20 3 Philips Semiconductors Product specification Voltage reference diodes GRAPHICAL DATA MBG534 1N821 to 1N829 1N821A to 1N829A handbook, halfpage 10 (2) (3) (1) handbook, halfpage IZ (mA) 7.5 0.002 SZ (%/K) 0.001 MBG536 0 -0.001 5 (1) (2) (3) -0.002 2.5 -75 -50 -25 0 Vref(max) (mV) 25 50 -0.003 4 5 6 7 8 9 10 IZ (mA) 11 Referenced to IZ = 7.5 mA. (1) Tj = 100 C. (2) Tj = 25 C. (3) Tj = -55 C. Fig.2 Working current as a function of the maximum reference voltage excursion. Fig.3 Temperature coefficient change as a function of working current; typical values. 103 handbook, halfpage rdif () 102 MBG535 10 (1) (2) (3) 1 1 10 IZ (mA) 102 (1) Tj = 100 C. (2) Tj = 25 C. (3) Tj = -55 C. Fig.4 Differential resistance as a function of working current; typical values. 1996 Mar 20 4 Philips Semiconductors Product specification Voltage reference diodes PACKAGE OUTLINE 1N821 to 1N829 1N821A to 1N829A handbook, full pagewidth 0.55 max 1.6 max 25.4 min 3.04 max 25.4 min MSA212 - 1 Dimensions in mm. The marking band indicates the cathode. The diodes are type branded. Fig.5 SOD68 (DO-34). DEFINITIONS Data Sheet Status Objective specification Preliminary specification Product specification Limiting values Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or at any other conditions above those given in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended periods may affect device reliability. Application information Where application information is given, it is advisory and does not form part of the specification. LIFE SUPPORT APPLICATIONS These products are not designed for use in life support appliances, devices, or systems where malfunction of these products can reasonably be expected to result in personal injury. Philips customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Philips for any damages resulting from such improper use or sale. This data sheet contains target or goal specifications for product development. This data sheet contains preliminary data; supplementary data may be published later. This data sheet contains final product specifications. 1996 Mar 20 5 |
Price & Availability of 1N821A
 |
|
|
|
|
All Rights Reserved © IC-ON-LINE 2003 - 2022 |
| [Add Bookmark] [Contact Us] [Link exchange] [Privacy policy] |
|
Mirror Sites : [www.datasheet.hk]
[www.maxim4u.com] [www.ic-on-line.cn]
[www.ic-on-line.com] [www.ic-on-line.net]
[www.alldatasheet.com.cn]
[www.gdcy.com]
[www.gdcy.net] |