Diodes ZXNB4202 - Manual

ZXNB4202
ZXNB4202 (CONFIDENTIAL)
Document number: DS32071 Rev. 2 - 5
1 of 3
www.diodes.com
February 2010
© Diodes Incorporated
A Product Line of
Diodes Incorporated
CONFIDENTIAL
SINGLE LNB - COMPLETE BIAS, CONTROL AND POWER MANAGEMENT SOLUTION
Summary
The ZXNB4202 is a single chip power management and control solution for LNB's. The highly integrated solution provides all the
required FET and mixer bias, control detection and decoding, local oscillator switching and a stable power supply for the IF
amplifier and additional support functions. Packaged in a small 16 pin package the ZXNB only requires 3 external components
providing a very small compact solution. Being at the heart of the LNB monitoring the control, power management and
environmental conditions, the ZXNB4202 is able to provide reliable solution eliminating effects such as false switching and over
loading.
Features
• Single chip LNB bias, control and power management
• Integrated regulated supply for LNB
• Zero volt gate FET switching topology
• Voltage detection for polarization switching
• 22kHz tone detector with unwanted signal rejection for
band switching
• No external control signal filtering required
• Programmable mixer and FET bias
• Temperature compensated protected FET bias
• Full power management protection
Pin Assignments
Application
• Single and Single Universal LNBs
• Mono-block LNB's
• C-band LNB's
Single LNB System Diagram
Top View
Bottom View
D1
D2
G2
V
OUT
G1
GN
D
LB
C
SUB
ZXNB4202
HB
V
IN
RI
M
CA
RI
A
CA
DM GM G3 D3
GND
LB osc.
HB osc.
V
OUT
V
IN / CONTROL
Gain stages
GaAs / HEMT FET
Active
mixer
IF Gain stages
Ve
rt
ic
a
l
Hor
iz
o
ntal
ZXNB
4202
Set-top box
receiver