LTC6431-20 20dB Gain Block, 50 IF Amplifier FEATURES DESCRIPTION n 50 Matched 20MHz to 1400MHz The LTC 6431-20 is a gain block amplifier exhibiting n 20.8dB Power Gain excellent linearity at frequencies beyond 1000MHz and n 46.2dBm OIP3 at 240MHz Into 50 with low associated output noise. n NF = 2.6dB at 240MHz The unique combination of linearity, low noise and low n 0.6nV/Hz Total Input Noise power dissipation make this an ideal candidate for many n S11 < 10dB Up to 2.0GHz signal-chain applications. The LTC6431-20 is easy to n S22 < 10dB Up to 1.4GHz use, requiring a minimum of external components. It is n >2.0V Linear Output Swing P-P internally input/output matched to 50 and it draws only n P1dB = 22.0dBm 93mA from a single 5V supply. n 50 Single-Ended Input/Output n On-chip bias and temperature compensation maintain Insensitive to V Variation CC n performance over environmental changes. A-Grade 100% OIP3 Tested at 240MHz n Input/Output Internally Matched to 50 The LTC6431-20 uses a high performance SiGe BiCMOS n Single 5V Supply process for excellent repeatability compared with similar GaAs amplifiers. All A-grade LTC6431-20 devices are tested and guaranteed for OIP3 at 240MHz. The LTC6431-20 is APPLICATIONS housed in a 4mm 4mm 24-lead QFN package with an n Single-Ended IF Amplifier exposed pad for thermal management and low inductance. n ADC Driver LTC6431 FAMILY GAIN n CATV LTC6431-15 15.5dB LTC6431-20 20.8dB L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. TYPICAL APPLICATION OIP3 vs Frequency Single-Ended IF Amplifier 52 50 V = 5V 5V CC 48 RF CHOKE 46 560nH 44 LTC6431-20 42 1000pF 1000pF 50 50 V = 5V CC 40 T = 25C A 643120 TA01a P = 2dBm/TONE OUT 38 f = 1MHz SPACE Z = Z = 50 IN OUT 36 0 200 400 800 1000 600 FREQUENCY (MHz) 643120 TA01b 643120f 1 For more information www.linear.com/LTC6431-20 OIP3 (dBm)LTC6431-20 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1) TOP VIEW Total Supply Voltage (V to GND)...........................5.5V CC Amplifier Output Current (+OUT) .........................120mA 24 23 22 21 20 19 RF Input Power, Continuous, 50 (Note 2)..........15dBm DNC 1 18 OUT RF Input Power, 100s Pulse, 50 (Note 2) ........20dBm DNC 2 17 GND Operating Case Temperature Range DNC 3 16 T DIODE 25 (T ) .....................................................40C to 85C GND CASE DNC 4 15 DNC Storage Temperature Range .................. 65C to 150C DNC 5 14 DNC DNC Junction Temperature (T ) .................................... 150C 6 13 DNC J 7 8 9 10 11 12 UF PACKAGE 24-LEAD (4mm 4mm) PLASTIC QFN T = 150C, = 54C/W JMAX JC EXPOSED PAD (PIN 25) IS GND, MUST BE SOLDERED TO PCB ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC6431AIUF-20 PBF LTC6431AIUF-20 TRPBF 43120 24-Lead (4mm 4mm) Plastic QFN 40C to 85C T CASE LTC6431BIUF-20 PBF LTC6431BIUF-20 TRPBF 43120 24-Lead (4mm 4mm) Plastic QFN 40C to 85C T CASE Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. Consult LTC Marketing for information on nonstandard lead based finish parts. For more information on lead free part marking, go to: