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D3211


Category:

LNB Circuit of Satellite Receiver

Description

FET bias controller circuit

Number of channels

3

Operating voltage range

5V~10V

Quiescent current (Max)

15mA

Vsub (Typ

-3.0V

Oscillation frequency (Max)

800kHz

Threshold voltage (Typ)

14.75V

Output voltage

~

Packaging form

SSOP20
overview:

D3211 is a dedicated circuit used for satellite reception of LNBs, with functions such as polarization voltage detection switching, 22KHz pulse detection switching, and providing high amplifier, local oscillator level GaAs or HEMT FET transistor working point bias. The internal 22K detection and switching control of D321 1 consists of a 22K active filter, detector, comparator, and driver output stage. D3211 is widely used for bias control in satellite receivers, specialized mobile wireless radio equipment, and small telephones.

 

Main features:

● Provide GaAs and HEMT FETs transistor working bias function
● Capable of driving three FETs transistors
● Dynamic FET protection
● Change the drain current by changing the peripheral resistance value
● The negative voltage generator only requires two external capacitors
● Selection of drain voltage
● Wide voltage range of working power supply
● LNBs polarity switch - supports gate zero voltage
● 22kHz pulse detection
● Comply with satellite control characteristics
● Packaging form: SSOP20

 

application:

● Satellite receiving LNBs
● Dedicated Mobile Radio (PMR)
● Small telephone set

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