1、ao d- I z U w - EIA IS-48 88 m 3234600 0002555 O m EIA INTERIM - STANDARD Axial Lead Fixed Radio Frequency (RF) Coils EIA/IS-48 JUNE 1988 ELECTRONIC INDUSTRIES ASSOCIATION ENGINEERING DEPARTMENT I _ - EIA IS-48 88 m 3234b00 000255b 2 m I NOTICE I EIA Engineering Standards and Publications are design
2、ed to serve the public interest through eliminating misunderstandings between manufacturers and purchasers, facilitating interchangeability and improvement of products, and assisting the purchaser in selecting and obtaining with minimum delay the proper product for his particular need. Existence of
3、such Standards and Pub- lications shall not in any respect preclude any member or non-member of EIA from manufacturing or selling products not conforming to such Standards and Publications, nor shall the existence of such Standards and Publications preclude their voluntary use by those other than EI
4、A members, whether the standard is to be used either domestically or internationally. Recommended Standards and Publications are adopted by EIA without regard to whether or not their adoption may involve patents on articles, materials, or processes. By such action, EIA does not assume any liability
5、to any patent owner, nor does it assume any obligation whatever to parties adopting the Recom- mended Standard or Publication. This Interim Standard was developed by the P-3 Committee on Inductive Components. EIA INTERIM STANDARDS EIA Interim Standards contain information deemed to be of technical v
6、alue to the industry, and are published at the request of the orginating Committee without necessarily following the rigorous public review and resolution of comments which is a procedural part of the development of an EIA Recom- mended Standard. EIA Interim Standards should be reviewed on an annual
7、 basis by the formulating Committee and a decision made on whether to proceed to develop an EIA Recommended Standard on this subject. EIA Interim Standards must be cancelled by the Committee and removed from the EIA Standards Catalog before the end of their fifth year of existence. Published by ELEC
8、TRONIC INDUSTRIES ASSOCIATION Engineering Department 2001 Eye Street, N.W. Washington, D.C. 20006 PRICE: $15.00 Printed in U.S.A, E” - EIA IS-48 88 3234b00 0002557 4 . EIA/IS-48 Page 1 AXIAL LEAD FIXED RADIO FREQUENCY (RF) COILS 1. SCOPE This standard covers industrial grade RF coils which are inten
9、ded as simple inductive elements in RF circuits. They are primarily intended for machine packaging, insertion and soldering on printed wiring boards. NOTE: The parts described by this standard and the test procedures are based on inductance measurements using an Analog Q Meter System. 1.1 Part Ident
10、ification and Designation Parts shall be identified by a designation numbering system as follows: -1”- - Inductance i I_ Tolerance 1.2 Style The style is identified by the letters RF followed by two digits. style are given in the detail specifications associated with this standard. Details of the EI
11、A IS-48 88 m 3234600 0002558 b m e2 E IA- IS - 4 8 Page 2 1.3 Performance The performance identifies the performance and test capability of the part. TABLE I. INSPECTION GROUP TEST LimitR (allowable variation from , initial unless otherwise Specified) Phenolic b Powdered Ferrite Core Iron Core Quali
12、firation inspection (Table V) GROUP II L f 5% I101: Q 210% -20% DCR t(3X ,+.O01 ohms)% k(X: t.OO1 ohms)% SRF 2 RX -15% from minimutp. CROUP IV L I 3% q 210% f 5% -10% from minimum GROUP V L 2 5% 0 5x Q +15% -15% from minimum DCR ?(3X t .OOl ohms)% (3X t ,001 ohms)% SRF IlOX -10% from minimum Group C
13、 Inspection (Table VIII) SUBGROUP I L f 5% 0 5x O +15X -15% from minimiim DCR +(3X t .ci01 ohms)% f(3X + .O01 ohms)% SRF +1OX -10% frnni minimum SUBGROUP 11 I I, 2 51: 010% o +OX -20X from minimum DCR ?(3X t .O01 ohma)% I(5% t .O01 ohms12 SRF 2 8x -151: from mnimum 1.4 Inductance The inductance valu
14、e in microhenries is specified by three digits. values below 10 microhenries the first two digits are significant figures and the last digit indicates the number of zeros to follow. used to indicate a decimal point. See examples in TABLE II. Except for For values below 10 uh an R is EIA IS-48 88 H 3
15、234600 0002559 8 H i e EIA/IS-4 8 Page 3 e Standard inductance values are shown for each style in the detail specifications. TABLE II Designation of Inductance Values DESIGNATION R01 to R09 R10 to R91 1RO to 9R1 100 to 910 101 to 911 102 to 912 103 to 913 104 to 914 INDUCTANCE-MICROHENRIES 0.01 to .
16、o9 -isel. 0.1 to .g incl. 1.0 to 9.1 incl. 10 to 91 incl. 1 O0 to 910 incl. 1000 to 9100 incl. 1Q000 to 91000 . inCl. 100000 to 910000 incl. 1.5 To 1 erance . The inductance tolerance shall be specified according to TABLE III TABLE III. Inductance Tolerance Symbo 1 Inductance Tolerance-Percent (-F)
17、J 5 K 10 20 f! 2. APPLICABLE DOCUMENTS Unless otherwise specified the latest issue of the referenced specifications and standards are applicable. Standards EIA RS-186 EIA RS-296 MIL-STD-202 MIL-STD-105 Specifications J-W-1177 QQ-S -5 7 1 Standard Test Methods for Lead Taping of Components Automatic
18、Insertion Passive Electronic Component Parts in Axial Lead Configuration for Test Methods for Electron c and Electrical Component Parts Sampling Procedures and Tables for Inspection by Attributes Wire, Magnet, Electrical Solder, Tin-Lead Alloy EIA IS-48 88 m 3234600 00025b0 4 m EIA/Is - 4 8 Page 4 3
19、. REQUIREMENTS 3.1 Detai 1 Specification Sheets Detailed requirements are specified in this standard and in the detail specifica- tion sheets for individual styles. In case of conflict between this standard and the detail sheets, the latter shall govern. 3.2 Qualification Parts furnished to this spe
20、cification may be qualified (certified) to compliance with this specification by being tested to and meeting the requirements of TABLE V. 3.3 Materials Materials shall be as specified herein. specified, any material may be used which will enable the part to meet the performance requirements. When a
21、definite material is not 3.3.1 Enclosure Body material must not soften or deform when exposed to the maximum operating temperature specified or when subjected to the specified tests. 3.3.2 Magnet Wire Insulated wire used in winding shall conform to J-W-1177 when applicable. 3.3.3 Termina 1 s The ter
22、minal lead wires shall be copper with a tin-lead solder coating with a 10% to 90% tin content. 3.4 Marking Coils shall be marked with four bands, three indicating the inductance in micro- henries and the fourth band indicating the tolerance in percent. shall be in accordance with the color code of T
23、able IV. When either the first or second band of the three bands is gold, this band shall represent the decimal point for inductance values less than 10, and the other two bands shall represent significant figures. For inductance values of 10 or more, the first two bands shall represent significant
24、figures, and the third band shall represent the multiplier. color coding for units with inductance values less than 10 and for 10 or greater is shown on Figure 1. The marking shall be legible upon completion of each examination or test. Color coding The colors used shall be in accordance with EIA RS
25、-359. Typical When seecified on the contract or order the coils may be printed in place of being O color banded. minimum. The printing shall include the inductance value and tolerance as a EIA IS-48 88 3234600 0002563 6 M EIA/IS- 4 8 Page 5 The package marking should include all items listed below:
26、1. 2. Inductance tolerance 3. Type designation 4. Manufacturers trade mark or source code 5. Manufacturing date code Inductance value (See Paragraph 1.4) TABLE IV. 3.5 Workmanship Color - cc Si niftcant Pi gure O 1 2 3 4 5 6 7 8 9 - - Decimal point ir code. Hultipltcr I/ 1 10 1 O0 1,000 I/ The multi
27、plier is the factor by which the two significant figures are multiplied to yield the nominal Inductance value. 2J indicates body color. Parts shall be processed in such a manner as to be uniform in quality and be free from defects that will affect life, serviceability or function. 3.6 Packaging Unle
28、ss otherwise specified item quantities higher than 499 pieces shall be packaged in accordance with EIA RS-296 “Lead Taping of Components in Axial Lead Configuration for Automatic Insertion“. commercial bulk packages. Other quantities shall be in normal EIA/IS- Page 6 EIA IS- - 4 8 8 B8 3234600 00025
29、b2 8 - r DECIMAL POINT (GOLD) ANCE (SILVER) 6.8 MICROHENRIES f10 PERCENT SECOND SIGNIFICANT r MULTIPLIER (BROWN) .FIRST SIGNIFICANT FIGURE (nom) FIGURE (RED) 1 r 270 MICROHENRIES i5 PERCENT NOTE: The color band for the first significant digit shall be twice the width of the other bands FIGURE 1. Typ
30、ical color c0din.g EIA IS-48 8 m 3234600 O002563 T m EIA/IS-48 Page 7 4. OUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection The manufacturer is responsible for verifying that the parts conform to the requirements of this standard and the applicable detail specification. 4.2 Test Equipmen
31、t and Inspection Facilities 4.3 InsPection C-onditions Unless otherwise specified herein, all inspections shall be performed in accordance with the test conditions specified in the General Requirements of MIL-STD-202. 4.3.1 Precautions - Adequate precautions shall be taken during inspection to preve
32、nt condensation of moisture on coils except during the moisture-resistance and thermal shock tests . 4.3.2 Test voltage The test voltage shall contain no more,than 5 percent harmonic distortion. 4.3.3 Test Frequency When a test frequency is specified without a tolerance, the frequency used shall be
33、within k1.0 percent of the specified value. 4.3.4 Demagnetization When necessary to overcome remanence effects, demagnetization is permitted. 4.4 Oualification Qualification testing shall be performed as specified in TABLE V. 4.4.1 Qualification Sample A sample consisting of 21 units of the highest
34、value and 21 units of the lowest value for which qualification is sought shall be submitted. 4.4.2 Inspection Routine The sample shall be subjected to the inspections specified in TABLE V, in the order shown. All sample units except Group III, shall be subjected to the inspection of Group I. The sam
35、ple shall then be divided as specified in TABLE V for Groups II to VI1 inclusive, and the sample units subjected to the inspection for their particular group. EIA IS-48 88 m 3234600 0002564 L m t EIA/I;S- 4 8 Page 8 4.4.3 Fa i 1 u res Failures in excess of those specified shall be cause for refusal
36、to grant qualification approval. 4.5 Qual i ty Conformance Inspection 4.5.1 InsDection of Product for Deliverv Inspection of product for delivery shall consist of Groups A and B inspect ions, 4.5.1.1 Inspection Lot An inspection lot shall consist of all the coils produced under essentially the same
37、conditions, and offered for inspection at one time. The manufacturer may combine coils of different inductance values and inductance tolerances. The inductance value shall be equally representative of the production lot for that period, .a 4.5.1.2 Group A Inspection Group A inspection shall consist
38、of the inspections specified in TABLE VI, in the order shown. 4.5.1.2.1 Sampling Plan (Group A) Each coil offered for acceptance shall be subject to the Subgroup I inspection. Statistical sampling and inspection for Subgroup II shall be in accordance with MIL-STD-105 for general inspection Level II.
39、 The acceptable quality levels (AQL) shall be as specified in TABLE VI. Major and minor defects shall be as defined in MIL-STD-105. 1- EIA IS-4 BB m 3234600 0002565 3 m EIA/I S- 4 8 Page 9 TABLE V, Qualification Testing 1 -I- -_-_ Test Number of sample INumber of I I paragraph lunits to be Ifailures
40、 I I- I inspected (permitted I I I I 1 I I I -_I-_- i - - i- I I croup I Tail sampiesr i/ 7- ! J.6.2 ITherrnal shock - - - - - - - (Visual and mechanical I . Inspection Test I inspeation - - - - - - - I Y.6.1 Dielectric Withstanding I Voltage- - - - - - - - - 1 li.6.11 - i Electrical Characteristics
41、 I 1/4.3 I (Initial) I I I I crou.E!-LL L/ 1 !Life - - - - - - - - - - - I u.L.4 I- I Electrical characteristics i I . (final) - - - - - - - - I 4.4-3 1 I I Group III 2/ I - - - : .So 1 be withheld until the Group action was successful. 4.6 Methods of Test and Requirements 4.6.1 Visual and Mechanica
42、l Inspection Parts shall be inspected under 3X magnification to verify that the materials, design, construction, physical dimensions, markings, and workmanship are in accordance with the applicable requirements. r( .6.2 Therial. shock Coils shall be tested in aocordanoo with EIA RS-186-11 Condition
43、B. Thr following details and exoeption shall apply: a. Hounting - Coils shall not be mounted. They shall be plaoed in oontainers whioh allow oiroulaton of IA r to eaoh coil.?o cj b. The temperature extremes shall be -40 (4 C fg and $125 C-o ce d, e. Measurements after cycling shall take place after
44、stabilization at The number of cycles shall be 5 Parts shall be held at the temperature extremes for 30 st5 minutes and the transfer time shall be between 2 and 5 minutes. room temperature and within 24 hours. When tested as specified there shall be no mechanical damage and the parts shall meet the
45、initial requirements for inductance and Q. The coils shall be mounted 4.6.3 Electrical charactertstics by their normal mounting means on the test fixture. The electrical characteristios to be determined shall include inductance, Q, self-resonant frequency, and dc resistance. 4.6.3.1 Inductance. Unle
46、ss otherwise specified effective inductance of. coils sh.11 be measured using the procedure detailed in 4.6.3.1.1. In the specified test fixture in Figure 2. 4.6.3,l.l Inductance measurement. (1Ouh and less) The test shall be perormed using instruments such as the Hewlett Pnckard HP4342A, used to ca
47、librate the frequency of the Q-meter within 0.1 percent OK the applicable test frequency. shall be as follows: Suitable means shall be Frequencies to be used for testing the various ranges of inductance Inductance range, uH Tee t frequency , bElz 0.1 to 1.0 incl., 25.2 Above 1.0 to 10.0 incl. . . .
48、. 7.96 . .- EIA IS-48 88 m 3234600 00025b9 O m EIA/IS-4 8 Page 13 Effective inductance shall be determined as follows when using the applicable test fixture. The appropriate test fixture shall be inserted in the Q-meter coil terminals. The Q-meter capacitance dial shall be set at 400 picofarads and
49、the vernier capacitance dial at zero. The applicable shorting bar shall be inserted in the clips of the test fixture in such a manner that the terminals rest firmly against the stops, and 30 that the bar is centered between the test-fixture terminals. The Q-meter shall then be resonated using the frequency dial until a peak reading is obtained. This frequency shall be monitored in order to obtain an accuracy Of 0.1 percent. This resonant frequency value in megahertz shall be recorded. Th
