Diodes ZXNB4202 User Manual
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Diodes Incorporated
ZXNB4202
SINGLE LNB - COMPLETE BIAS, CONTROL AND POWER MANAGEMENT SOLUTION
Summary
The ZXNB4202 is a single chip power management a nd c ontrol s oluti on fo r LNB's. T he h i ghly inte grated sol ution pr ovides a ll th e
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 1 6 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 reliabl e solution eliminating effects such as false switching and ove r
loading.
Features
• Single chip LNB bias, control and power management
CONFIDENTIAL
• 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
Application
• Single and Single Universal LNBs
• Mono-block LNB's
• C-band LNB's
Single LNB System Diagram
Pin Assignments
G1
D1
D2
G2
CA
CA
RIM
GND
RIA
ZXNB4202
D3
G3
DM
Top View
GND
Bottom View
V
IN
GM
V
HB
LB
C
OUT
SUB
Vertical
Gain stages
GaAs / HEMT FET
Active
mixer
IF Gain stages
Set-top box
receiver
ZXNB
4202
Horizontal
LB osc.
HB osc.
V
OUT
V
IN / CONTROL
ZXNB4202 (CONFIDENTIAL)
Document number: DS32071 Rev. 2 - 5
1 of 3
www.diodes.com
February 2010
© Diodes Incorporated
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Product Line o
f
Diodes Incorporated
ZXNB4202
To Request This Datasheet
In Its Entirety Please Email
CONFIDENTIAL
DBS@diodes.com
ZXNB4202 (CONFIDENTIAL)
Document number: DS32071 Rev. 2 - 5
2 of 3
www.diodes.com
February 2010
© Diodes Incorporated
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