Surface Mount PIN Diode Limiter LM401102-Q-B-301 / LM401102-Q-C-301 Data Sheet Features * Surface Mount Limiter in Compact Package: * 8 mm L x 5 mm W x 2.5 mm H * Incorporates PIN Limiter Diodes, DC Blocks, Schottky Diode & DC Return * Wide Frequency Range (400 to 1000 MHz) * Higher Average Power Handling than Plastic-Packaged Limiters (100 W CW ) * Very Low Insertion Loss (0.3 dB) * Low Flat Leakage Power (18 dBm) * RoHS Compliant Applications * Receiver protection for octave band radar applications from 400-1000 MHz. Description The LM401102-Q-B-301 & LM401102-Q-C-301 Surface Mount Silicon PIN Diode Limiter modules are passive two-stage power limiter which can operate over the frequency range of 400 to 1000 MHz. It is manufactured using Aeroflex-Metelics proven hybrid manufacturing process incorporating PIN diodes and passive devices integrated onto a ceramic substrate. These low profile, compact, (8 mm L x 5 mm W x 2.5 mm H) surface mount component offers outstanding small and large signal performance. The LM401102-Q-B-301 comprises a DC block at its input, shunt PIN limiter diodes driven by a Schottky diode detector stage and a "clean-up stage" limiter PIN diode with an internal RF choke DC return. The LM401102-Q-C-301 comprises a DC block at its input, shunt PIN limiter diodes driven by a Schottky diode detector stage, a "clean-up stage" limiter PIN diode with an internal RF choke DC return and a DC block at its output. The very low thermal resistance (15C/W, junction to bottom surface of package) of the PIN diodes in this device and the presence of a Schottky detector bias current source enables it to reliably handle RF incident power levels up to 50 dBm CW and RF peak incident power levels up to 60 dBm (25 s pulse width, 5% duty cycle) at TCASE = 85 C. The I-layer thickness of the output stage and the design of the internal Schottky detector current source combine to produce flat leakage of 18 dBm typical and spike leakage energy of 0.5 ergs, typical. No external control signals are required. Environmental Capabilities The LM401102-Q-B-301 & LM401102-Q-C-301 limiters are compatible with high volume, surface mount, solder re-flow manufacturing methods. These products are durable and capable of reliably operating in military, commercial, and industrial environments. These limiter modules are RoHS compliant and are available in tube or tape-reel. The LM401102-Q-B-301 & LM401102-Q-C-301 limiter modules are capable of meeting the environmental requirements of MIL-STD-750 and MIL-STD-202. 1 Document No. DS 13415 Rev.G, ECN 12849 Revision Date: 5/7/2013 PIN Diode Limiter ESD and Moisture Sensitivity Level Rating As are all semiconductor devices, PIN diode limiters are susceptible to damage from ESD events. The ESD rating for this device is Class 0 (HBM). The moisture sensitivity level rating for this device is MSL 1. Limiter Schematic - LM401102-Q-B-301 Limiter Schematic - LM401102-Q-C-301 Pinout 2 603-641-3800 * 888-641-SEMI (7364) * metelics-sales@aeroflex.com * www.aeroflex.com/metelics Document No. DS 13415 Rev.G, ECN 12849 Revision Date: 5/7/2013 PIN Diode Limiter Absolute Maximum Ratings @ Z0 = 50 , TA= +25C as measured in Aeroflex evaluation board (Unless Otherwise Defined) Parameter Operating Temperature Storage Temperature Junction Temperature Assembly Temperature Conditions Absolute Maximum Value t = 30 s -65C to 150C -65C to 150C 175C 260C RF Peak Incident Power Handling TCASE = 85 C, source and load VSWR < 1.2:1, RF pulse width = 25 s, duty cycle = 5%, derate linearly to 0 W at TCASE = 150C (note 1) 60 dBm RF CW Incident Power Handling TCASE = 85 C, source and load VSWR < 1.2:1, derate linearly to 0 W at TCASE = 150 C (note 1) 50 dBm Junction to bottom surface of package 25C/W JC Thermal Resistance Notes: 1 TCASE is defined as the temperature of the bottom surface of the package LM401102-Q-B-301 / LM401102-Q-C-301 Electrical Specifications Z0 = 50 , TA= 25C as measured in Aeroflex evaluation board (Unless Otherwise Defined) Parameter Symbol Test Conditions Frequency F Insertion Loss IL Return Loss RL Input 1 dB Compression Point IP1dB 2ND Harmonic 2F0 PIN = 0 dBm F0 = 500 MHz Peak Incident Power Pinc(Pk) RF Pulse Width = 25 s, duty cycle = 5%, trise 2 s, tfall 2 s CW Incident Power Pinc(CW) 400 MHz F 1000 MHz, PIN = 0 dBm 400 MHz F 1000 MHz, PIN = 0 dBm 400 MHz F 1000 MHz 400 MHz F 1000 MHz Min. Value Typ. Value 400 0.3 Max. Value Units 1000 MHz 0.5 dB 15 17 dB 8 10 12 dBm -50 -45 dBc 60 dBm 50 51 dBm 18 21 dBm Flat Leakage Power FL Pin = 60 dBm peak, RF pulse width = 25 s, duty cycle = 1%, trise 2 s, tfall 1 s Spike Leakage Energy SL Pin = 60 dBm peak, RF pulse width = 25 s, duty cycle = 1% 0.5 0.6 erg Recovery Time TR 50% falling edge of RF pulse to 1 dB IL, PIN = 60 dBm peak, RF pulse width = 25 s, duty cycle = 5%, trise 2 s, tfall 1 s 5 10 s 603-641-3800 * 888-641-SEMI (7364) * metelics-sales@aeroflex.com * www.aeroflex.com/metelics Document No. DS 13415 Rev.G, ECN 12849 Revision Date: 5/7/2013 3 PIN Diode Limiter Criteria for Proper Mounting on PCB When a large signal is incident upon the input of the LM401102-Q-B-301/LM401102-Q-C-301, the impedance of the coarse limiter diodes is forced to a low value by the charge which is injected into these diodes by the combination of the current from the internal detector stage and the large RF voltage initially present across these diodes. As the impedance of these diodes decreases, an increasingly large impedance mismatch with the impedance of the transmission line to which the limiter is connected is created. Ultimately, the impedance of the coarse limiter diodes is reduced to a few ohms or less. This mismatch creates a standing wave, with a current maximum and voltage minimum located at the position of the coarse limiter diodes. While the large majority of the input signal power is reflected back to its source due to the impedance mismatch, the significant RF current that flows at the current maximum causes Joule heating to occur in the coarse limiter diodes. In order to maintain the junction temperature of these diodes below their maximum rated value, there must be a path with minimal thermal resistance from the coarse diodes to the external system heat sink. Also, there must be a minimal electrical resistance and inductance between the underside of the limiter module package and the system ground in order to achieve maximum RF isolation between the input and the output of the limiter module. For these reasons, it is imperative that there are no voids in the electrical and thermal paths directly under the coarse limiter diodes. Care must be taken when mounting the LM401102-Q-B-301/LM401102-Q-C-301 to avoid voids in the solder joint in the area along the lengthwise axis of the package, under and between the filled vias in the AlN substrate of the module which are shown in the diagram (above). It is also important to ensure no solder voids exist between the limiter module RF ports and the PCB to which the limiter module is attached. No greater than 50% of the remaining metalized area on the bottom of the package may contain solder voids. 4 603-641-3800 * 888-641-SEMI (7364) * metelics-sales@aeroflex.com * www.aeroflex.com/metelics Document No. DS 13415 Rev.G, ECN 12849 Revision Date: 5/7/2013 PIN Diode Limiter LM401102-Q-C-301 Typical Performance Z0 = 50 , TCASE= 25C, PIN = 0 dBm as measured in the Aeroflex Metelics evaluation board (Unless Otherwise Defined) Insertion Loss vs. Frequency Return Loss vs. Frequency CW Output Power vs. CW Input Power 603-641-3800 * 888-641-SEMI (7364) * metelics-sales@aeroflex.com * www.aeroflex.com/metelics Document No. DS 13415 Rev.G, ECN 12849 Revision Date: 5/7/2013 5 PIN Diode Limiter SP2T Switch Evaluation Board Layout The evaluation board for the LM401102-Q-B-301/LM401102-Q-C-301 limiter is shown above. This evaluation board comprises two sections: the evaluation circuit for the limiter module; and, a reference transmission line. The limiter module is mounted in position U1. Its RF input is connected to J1 and its output port is connected to J2, via two 50- microstrip transmission lines. The reference path 50- microstrip transmission line structure can be utilized to determine the insertion loss of the transmission line structures connected between J1 and the limiter module input, as well as between the limiter module output and J2, so that their respective insertion losses may be subtracted from the total insertion loss measured between J1 and J2. This enables the resolution of the insertion loss of the limiter module only. The evaluation board is supplied mounted on a heat sink. The maximum RF input power specified in the Absolute Maximum Ratings table must not be exceeded. 6 603-641-3800 * 888-641-SEMI (7364) * metelics-sales@aeroflex.com * www.aeroflex.com/metelics Document No. DS 13415 Rev.G, ECN 12849 Revision Date: 5/7/2013 PIN Diode Limiter Assembly Instructions The LM401102-Q-B-301/LM401102-Q-C-301 limiter is capable of being placed onto a circuit board by pick-and-place manufacturing equipment from tube or tape-reel dispensing. The device is attached to the circuit board using conventional solder re-flow or wave soldering procedures with RoHS type or Sn60/Pb40 type solders per the recommended time-temperature profile shown below. Table 1. Time-Temperature Profile for Sn60/Pb40 or RoHS Type Solders Profile Feature SnPb Solder Assembly Pb-Free Solder Assembly 3C /second maximum 3C /second maximum - Temperature Min (TSMIN) 100C 150C - Temperature Max (TSMAX) 150C 200C 60-120 s 60-180 s Average Ramp-Up Rate (TL to TP) Preheat: - Time (min to max)(tS) TSMAX to TL - Ramp-Up Rate Time Maintained Above: - Temperature (TL) - Time (tL) Peak temperature (TP) Time Within 5C of Actual Peak Temperature (tP) Ramp-Down Rate Time 25C to Peak Temperature 3C/s maximum 183C 217C 60-150 s 60-150 s 225 +0/-5C 260 +0/-5C 10 - 30 s 20 - 40 s 6C /s maximum 6C /s maximum 6 minutes maximum 8 minutes maximum Figure 1. Solder Re-Flow Time-Temperature Profile 603-641-3800 * 888-641-SEMI (7364) * metelics-sales@aeroflex.com * www.aeroflex.com/metelics Document No. DS 13415 Rev.G, ECN 12849 Revision Date: 5/7/2013 7 PIN Diode Limiter LM401102-Q-B-301 / LM401102-Q-C-301 Limiter Outline (CS301) .315 .003 (8.0 0.08) .200 .003 (5.1 0.08) RF INPUT RF INPUT PORT INDICATOR WITH WHITE EPOXY INDELIBLE INK RF OUTPUT 0.10 0.03 (2.5 0.8) TOP VIEW SIDE VIEW .026 TYP. (0.66) 2 PLCS. .080 TYP. (2.0) 2 PLCS. CL .032 TYP. (0.81) 2 PLCS. CL CIRCUIT SIDE VIEW .055 TYP. (1.4) 2 PLCS. NOTES: 1. SUBSTRATE MATERIAL: 20 MIL THICK ALUMINUM NITRIDE (AlN) RF COVER: BLACK CERAMIC. 2. TOP SIDE AND BACKSIDE METALLIZATION: REF: PNLB 12892. 3. DIMENSION IN PARENTHESIS ARE IN MM. 8 603-641-3800 * 888-641-SEMI (7364) * metelics-sales@aeroflex.com * www.aeroflex.com/metelics Document No. DS 13415 Rev.G, ECN 12849 Revision Date: 5/7/2013 PIN Diode Limiter RF Circuit Solder Footprint for Case Style 301 (CS301) Notes: 1 2 Recommended PCB material is Rogers 4350, 10 mils THK. Hatched area is RF, DC, and thermal ground. Vias should be solid copper filled and gold plated for optimum heat transfer from backside of limiter module through circuit vias to thermal ground. 603-641-3800 * 888-641-SEMI (7364) * metelics-sales@aeroflex.com * www.aeroflex.com/metelics Document No. DS 13415 Rev.G, ECN 12849 Revision Date: 5/7/2013 9 PIN Diode Limiter Part Number Ordering Information Part Number Description Packaging LM401102-Q-B-301-T Tube LM401102-Q-B-301-R Tape-Reel (Quantities of 250 or 500) LM401102-Q-B-301-W Waffle Pack LM401102-Q-B-301-E RF Evaluation Board with Heat Sink LM401102-Q-C-301-T Tube LM401102-Q-C-301-R Tape-Reel (Quantities of 250 or 500) LM401102-Q-C-301-W Waffle Pack LM401102-Q-C-301-E RF Evaluation Board with Heat Sink Aeroflex / Metelics, Inc. ISO 9001:2008 certified companies 54 Grenier Field Road, Londonderry, NH 03053 Tel: (603) 641-3800 Sales: (888) 641-SEMI (7364) Fax: (603)-641-3500 975 Stewart Drive, Sunnyvale, CA 94085 Tel: (408) 737-8181 Fax: (408) 733-7645 www.aeroflex.com/metelics metelics-sales@aeroflex.com Aeroflex / Metelics, Inc. reserves the right to make changes to any products and services herein at any time without notice. Consult Aeroflex or an authorized sales representative to verify that the information in this data sheet is current before using this product. Aeroflex does not assume any responsibility or liability arising out of the application or use of any product or service described herein, except as expressly agreed to in writing by Aeroflex; nor does the purchase, lease, or use of a product or service from Aeroflex convey a license under any patent rights, copyrights, trademark rights, or any other of the intellectual rights of Aeroflex or of third parties. Our passion for performance is defined by three attributes represented by these three icons: solution-minded, performance-driven and customer-focused. Copyright 2012 Aeroflex / Metelics. All rights reserved. Document No. DS 13415 Rev.G, ECN 12849 Revision Date: 5/7/2013 10