LM401102-Q-B-301-T - Aeroflex / Metelics

Document No. DS 13415 Rev.G, ECN 12849

Revision Date: 5/7/2013

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 (15ºC/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 µs pulse width, 5% duty

cycle) at TCASE = 85 ºC. 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.

Surface Mount PIN Diode Limiter

LM401102-Q-B-301 / LM401102-Q-C-301

Data Sheet

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.

Limiter Schematic – LM401102-Q-B-301

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Document No. DS 13415 Rev.G, ECN 12849

Revision Date: 5/7/2013

PIN Diode Limiter

Pinout

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-C-301

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-B-301 / LM401102-Q-C-301 Electrical Specifications

Z0= 50 Ω, TA= 25ºC as measured in Aeroflex evaluation board (Unless Otherwise Defined)

Parameter Symbol Test Conditions Min.

Value

Typ.

Value

Max.

Value Units

Frequency F 400 1000 MHz

Insertion Loss IL 400 MHz ≤F ≤1000 MHz,

PIN = 0 dBm 0.3 0.5 dB

Return Loss RL 400 MHz ≤F ≤1000 MHz,

PIN = 0 dBm 15 17 dB

Input 1 dB Compression Point IP1dB 400 MHz ≤F ≤1000 MHz 8 10 12 dBm

2ND Harmonic 2F0

PIN = 0 dBm

F0= 500 MHz -50 -45 dBc

Peak Incident Power Pinc(Pk) RF Pulse Width = 25 µs, duty cycle = 5%,

trise ≤2 µs, tfall ≤2 µs 60 dBm

CW Incident Power Pinc(CW) 400 MHz ≤F ≤1000 MHz 50 51 dBm

Flat Leakage Power FL Pin = 60 dBm peak, RF pulse width = 25 µs, duty

cycle = 1%, trise ≤2 µs, tfall ≤1 µs 18 21 dBm

Spike Leakage Energy SL Pin = 60 dBm peak, RF pulse width = 25 µs, 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 µs, duty cycle = 5%,

trise ≤2 µs, tfall ≤1 µs

5 10 µs

Parameter Conditions Absolute Maximum Value

Operating Temperature -65ºC to 150ºC

Storage Temperature -65ºC to 150ºC

Junction Temperature 175ºC

Assembly Temperature t = 30 s 260ºC

RF Peak Incident Power Handling

TCASE = 85 ºC, source and load VSWR < 1.2:1,

RF pulse width = 25 µs, duty cycle = 5%,

derate linearly to 0 W at TCASE = 150ºC (note 1)

60 dBm

RF CW Incident Power Handling TCASE = 85 ºC, source and load VSWR < 1.2:1,

derate linearly to 0 W at TCASE = 150 ºC (note 1) 50 dBm

ΘJC Thermal Resistance Junction to bottom surface of package 25ºC/W

Absolute Maximum Ratings

@ Z0= 50 Ω, TA= +25ºC as measured in Aeroflex evaluation board (Unless Otherwise Defined)

Notes:

TCASE is defined as the temperature of the bottom surface of the package1

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

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.

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 Ω, TCASE= 25ºC, 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

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Document No. DS 13415 Rev.G, ECN 12849

Revision Date: 5/7/2013

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-Ωmicrostrip transmission lines.

The reference path 50-Ωmicrostrip 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.

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

Table 1. Time-Temperature Profile for Sn60/Pb40 or RoHS Type Solders

Profile Feature SnPb Solder Assembly Pb-Free Solder Assembly

Average Ramp-Up Rate (TLto TP)3°C /second maximum 3°C /second maximum

Preheat:

- Temperature Min (TSMIN)

- Temperature Max (TSMAX)

- Time (min to max)(tS)

100°C

150°C

60-120 s

150°C

200°C

60-180 s

TSMAX to TL

- Ramp-Up Rate 3°C/s maximum

Time Maintained Above:

- Temperature (TL)

- Time (tL)

183°C

60-150 s

217°C

60-150 s

Peak temperature (TP)225 +0/-5°C 260 +0/-5°C

Time Within 5°C of Actual Peak

Temperature (tP)10 – 30 s 20 – 40 s

Ramp-Down Rate 6°C /s maximum 6°C /s maximum

Time 25°C to Peak Temperature 6minutes maximum 8minutes maximum

Figure 1. Solder Re-Flow Time-Temperature Profile

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.

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-B-301 / LM401102-Q-C-301 Limiter Outline (CS301)

.315 .003

(8.0

0.08)

.200 .003

(5.1

0.08)

RF INPUT PORT INDICATOR

WITH WHITE EPOXY

INDELIBLE INK

.080

TYP.

(2.0)

2 PLCS.

.032

TYP.

(0.81)

2 PLCS.

.026 TYP.

(0.66)

2 PLCS.

.055 TYP.

(1.4)

2 PLCS.

(2.5 0.8)

0.10 0.03

SIDE VIEW

CIRCUIT SIDE VIEW

TOP VIEW

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.

OUTPUT

INPUT

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PIN Diode Limiter

RF Circuit Solder Footprint for Case Style 301 (CS301)

Document No. DS 13415 Rev.G, ECN 12849

Revision Date: 5/7/2013

Notes:

Recommended PCB material is Rogers 4350, 10 mils THK.1

Hatched area is RF, DC, and thermal ground. Vias should be solid copper filled and gold plated for optimum heat transfer from2

backside of limiter module through circuit vias to thermal ground.

Our passion for performance is defined by three

attributes represented by these three icons:

solution-minded, performance-driven and customer-focused.

Document No. DS 13415 Rev.G, ECN 12849

Revision Date: 5/7/2013

Aeroflex / Metelics, Inc.

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.

ISO 9001:2008 certified companies

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