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L8402 Datasheet Preview

L8402 Datasheet

LOW POWER 4 STAGE FET BIAS CONTROLLER

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UNISONIC TECHNOLOGIES CO., LTD
L8402
LINEAR INTEGRATED CIRCUIT
LOW POWER 4 STAGE FET
BIAS CONTROLLER
DESCRIPTION
The UTC L8402 is designed to bias the MOSFETs that are
commonly used in LNBs that can implies minimum external
components requires.
The UTC L8402, provide four FETs bias control respectively.
By adjusting two external resistors, it can change the FETs bias
current to optimize the satellite receiver front end block
performances.
As an additional feature the Rcal pins can also be used as logic
inputs to disable pairs of FETs as part of a power management
scheme or simply an alternative to LNA switching. Driven to a
logic high (>3.0V), the inputs disable their associated FET bias
stages by switching gate feeds to 2.5V and drain feeds open
circuit.
It generates the required negative voltage to bias the gate of
FETs, and internally provides protection circuit that can protect
the FET devices during supply voltage transient. So it is very
popular in satellite receiver front end block.
FEATURES
* Can Bias up to 4 FETs
* Wide supply voltage range: 3V~8V
* Low quiescent supply current, 1.2mA typical
* FET drain voltages set at 2.0V
* Adjustable FET device operating current
* FET drain voltages and currents held stable over temperature
and VCC variations
* Built in FET device protection circuit
* Low external component count
ORDERING INFORMATION
Ordering Number
Lead Free
Halogen Free
L8402L-R16-R
L8402G-R16-R
L8402L-Q16-3030-R
L8402G-Q16-3030-R
Package
SSOP-16
QFN-16(3× 3)
SSOP-16
(150mil)
1
QFN-16(3x3)
Packing
Tape Reel
Tape Reel
L8402G-S16-R
(1)Packing Type
(2)Package Type
(3)Green Package
(1) R: Tape Reel
(2) R16: SSOP-16, Q16-3030: QFN-16(3×3)
(3) G: Halogen Free and Lead Free, L: Lead Free
www.unisonic.com.tw
Copyright © 2019 Unisonic Technologies Co., Ltd
1 of 7
QW-R123-022.C




UTC

L8402 Datasheet Preview

L8402 Datasheet

LOW POWER 4 STAGE FET BIAS CONTROLLER

No Preview Available !

L8402
MARKING
SSOP-16
16 15 14 13 12 11 10 9
UTC
L8402
1 2345 6 7 8
Date Code
L: Lead Free
G: Halogen Free
Lot Code
LINEAR INTEGRATED CIRCUIT
QFN-16(3× 3)
Lot Code
UTC
L8402
L: Lead Free
G: Halogen Free
Date Code
PIN CONFIGURATION
D1
G1
D2
G2
Vcc
GND
CNB1
CNB2
1
2
3
4
5
6
7
8
UTC
L8402
SSOP-16
16 VCC
15 D3
14 G3
13 D4
12 G4
11 RCAL1
10 RCAL2
9 CSUB
D2 1
G2 2
VCC 3
GND 4
16 15 14 13
CSUB
Top View
12 G3
11 D4
10 G4
9 RCAL1
5 678
QFN-16(3× 3)
PIN DESCRIPTION
PIN NO.
SSOP-16 QFN-16(3×3)
1 15
2 16
31
42
53
64
75
86
97
10 8
11 9
12 10
13 11
14 12
15 13
16 14
PIN NAME
D1
G1
D2
G2
VCC
GND
CNB1
CNB2
CSUB
RCAL2
RCAL1
G4
D4
G3
D3
VCC
DESCRIPTION
To D of FET 1
To G of FET 1
To D of FET 2
To G of FET 2
Power supply
GND
Connect an external cap to CNB2
Connect an external cap to CNB1
Connect an external cap to produce -2.5V
Setting Id2/4 to 10mA
Setting Id1/3 to 10mA
To G of FET 4
To D of FET 4
To G of FET 3
To D of FET 3
Power supply (Pin 14 needs to be powered for the device to
function)
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
2 of 7
QW-R123-022.C


Part Number L8402
Description LOW POWER 4 STAGE FET BIAS CONTROLLER
Maker UTC
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