Datasheet LTC6430-15 (Analog Devices)

LTC6430-15 High Linearity Differential RF/IF Amplifier/ADC Driver
FeaTures DescripTion
n
50.0dBm OIP3 at 240MHz into a 100Ω Diff Load
The LTC®6430-15 is a differential gain block amplifier n
NF = 3.0dB at 240MHz
designed to drive high resolution, high speed ADCs with n
20MHz to 2000MHz Bandwidth
excellent linearity beyond 1000MHz and with low associ- n
15.2dB Gain
ated output noise. The LTC6430-15 operates from a single n
A-Grade 100% OIP3 Tested at 240MHz
5V power supply and consumes only 800mW. n 1.0nV/√Hz Total Input Noise In its differential configuration, the LTC6430-15 can directly n S11 < –15dB Up to 1.2GHz drive the differential inputs of an ADC. Using 1:2 baluns, n S22 < –15dB Up to 1.2GHz the device makes an excellent 50Ω wideband balanced n >2.75VP-P Linear Output Swing amplifier. While using 1:1.33 baluns, the device makes n P1dB = 24.0dBm a high fidelity 50MHz to 1000MHz 75Ω CATV amplifier. n Insensitive to VCC Variation n 100Ω Differential Gain-Block Operation The LTC6430-15 is designed for ease of use, requiring a n Input/Output Internally Matched to 100Ω Diff minimum of support components. The device is internally n Single 5V Supply matched to 100Ω differential source/load impedance. On- n DC Power = 800mW chip bias and temperature compensation ensure consistent n Unconditionally Stable performance over environmental changes. n 4mm × 4mm, 24-Lead QFN Package The LTC6430-15 uses a high performance SiGe BiCMOS process for excellent repeatability compared with similar
applicaTions
GaAs amplifiers. All A-grade LTC6430-15 devices are tested n Differential ADC Driver and guaranteed for OIP3 at 240MHz. The LTC6430-15 is n Differential IF Amplifier housed in a 4mm × 4mm, 24-lead, QFN package with an n OFDM Signal Chain Amplifier exposed pad for thermal management and low inductance. n 50Ω Balanced IF Amplifier For a single-ended 50Ω IF gain block with similar perfor- n 75Ω CATV Amplifier mance, see the related LTC6431-15. n 700MHz to 800MHz LTE Amplifier 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 Differential 16-Bit ADC Driver
50 5V V 48 CM 46 V RF 44 CC = 5V CHOKES 1:2 42 BALUN OIP3 (dBm) 40 LTC6430-15 ADC V 50Ω CC = 5V P 38 OUT = 2dBm/TONE ZIN = ZOUT = 100Ω DIFF. RSOURCE = 100Ω RLOAD = 100Ω FILTER TA = 25°C 643015 TA01a DIFFERENTIAL DIFFERENTIAL 36 0 200 400 600 800 1000 1200 FREQUENCY (MHz) 643015 TA01b 643015f 1 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information DC Electrical Characteristics AC Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Test Circuit A Operation Applications Information Differential S Parameters Typical Applications Package Description Typical Application Related Parts