Linear Technology DC426B, Быстрый старт

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DC426B DEMO BOARD QUICK START GUIDE
Description
:
The DC426B demo circuit board is intended to demonstrate the capabilities of the LT

5511 high
signal level upconverting mixer IC for 1900MHz infrastructure applications.
The LT5511 mixer IC is designed to meet the high linearity requirements of cable TV
infrastructure downstream transmitters and wireless infrastructure transmit systems. The IC
includes a differential LO buffer amplifier driving a double-balanced mixer. The LO, RF and IF
ports can be easily matched to a broad range of frequencies for different applications. The high
performance capability of the LO buffer allows the use of a single-ended source, thus eliminating
the need for an LO balun.
The LT5511 mixer de17dBm typical input 3
rd
order intercept at 950MHz, and +15.5dBm
IIP3 at 1900MHz, with IF input signal levels of –5dBm. The input 1dB compression point is
typ6dBm.
The DC426B demo board is optimized to upconvert a 50MHz IF input to 1900MHz RF output
with the LO injected from the high-side at 1950MHz.
Figure 1. LT5511 IC Block Diagram
LO
BUFFER
LO- LO+
NC
IF-
IF+
GND
GND
V
CC
BIAS
BIAS
CIRCUITS
1
2
3
4
5
6
7
8 9
10
11
12
13
14
15
16
17
RF-
RF+
NC
GND
GND
(BACKSIDE)
GND
GND
EN
V
CC
LO