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PDF AT1511 Data sheet ( Hoja de datos )
| Número de pieza | AT1511 | |
| Descripción | FET BIAS CONTROLLER AND TONE DETECTION | |
| Fabricantes | Aimtron Technology | |
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AT1511
Preliminary product Information
FET BIAS CONTROLLER AND TONE DETECTION
Features
•Provides bias for GaAs and HEMT FETs
•Drives up to three FETs
•Dynamic FET protection
•Drain current set by external resistor
•Regulated negative rail generator requires
only 2 external capacitors
•Choice in drain voltage
•Wide supply voltage range
•Polarisation switch for LNBs - supporting
zero volt gate switching
topology.
•22kHz tone detection for band switching
•Compliant with ASTRA control specifications
•SSOP surface mount package
Applications
˙Satellite receiver LNBs
˙Private mobile radio (PMR)
˙Cellular telephones
Description
The AT1511 includes bias circuits to drive up to
three external FETs. A control input to the
device selects either one of two FETs as
operational using 0V gate switching
methodology, the third FET is permanently
active. This feature is particularly used as an
LNB polarisation switch. Also specific to LNB
applications is the enhanced 22kHz tone
detection and logic output feature which is used
to enable high and low band frequency switching.
The detector has been specifically designed to
reject inerference such as low frequency signals
and DiSEqCTM tone bursts - without the use of
additional external components.
Drain current setting of the AT1511 is user
selectable over the range 0 to 15mA, this is
achieved with the addition of a single resistor.
The series also offers the choice of FET drain
voltage, the AT1511 gives 2 volts.
These devices are unconditionally stable over
the full working temperature with the FETs in
place, subject to the inclusion of the
recommended gate and drain capacitors. These
ensure RF stability and minimal injected noise.
It is possible to use less than the devices full
complement of FET bias controls, unused drain
and gate connections can be left open circuit
without affecting operation of the remaining bias
circuits.
In order to protect the external FETs the circuits
have been designed to ensure that, under any
conditions including power up/down transients,
the gate drive from the bias circuits cannot
exceed the range -3.5V to 1V. Furthermore if the
negative rail experiences a fault condition, such
as overload or short circuit, the drain supply to
the FETs will shut down avoiding excessive
current flow.
The AT1511 are available in SSOP20 for the
minimum in device size. Device operating
temperature is -40 to 70°C to suit a wide range
of environmental conditions.
Aimtron reserves the right without notice to change this circuitry and specifications.
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
http://www.aimtron.com.tw
Fax: 886-3-563-0879
Email: [email protected]
1
1 page  
AT1511
Preliminary product Information
FET BIAS CONTROLLER AND TONE DETECTION
Electrical characteristics
(Unless otherwise stated, Ta=25°C, VCC=5V, ID=10mA, RCTL=33kΩ)
Parameter
Symbol Min. Typ. Max. Unit
Supply Voltage
VCC 5
-- 10 V
-- 6 10 mA
-- 25 35 mA
Supply Current
ICC -- 25 35 mA
-- 16 25
-- 16 25 mA
Negative Voltage
VOUT
-3.5
--
-3.0
--
-2.5
-2.4
V
V
Drain Output Noise Voltage
Gate Output Noise Voltage
Oscillator Freq.
END --
-- 0.02 VPP
ENG --
-- 0.005 VPP
fo 200 350 800 kHz
DRAIN
Drain Current
ID 8 10 12 mA
Drain Current Charge with VCC ∆IDV
--
0.5
-- %/V
Drain Current Charge with Tj ∆IDT -- 0.05 -- %/℃
VD1 1.8 2.0 2.2
V
Drain Voltage
VD2 1.8 2.0 2.2
V
VD3 1.8 2.0 2.2
V
Drain Voltage Charge with VCC ∆VDV -- 0.5 -- %/V
Drain Voltage Charge with Tj ∆VDT -- 50 -- ppm
Leakage Current
IL1 -- -- 10 µA
IL2 -- -- 10 µA
GATE
Gate Output Current Range
IGO -30
-- 2000 µA
VG10 -0.05 0 0.05 V
Gate1 Output Voltage
VG1L -3.5 -2.9 -2.0
V
Gate2 Output Voltage
Gate3 Output Voltage
TONE DETECTION
Input Bias Current
Output Voltage
Output Current
Voltage Gain
Rejection Frequency
LOV Volt. Range
LOV Bias Current
LB Output Low
VG1H 0.4 0.75 1.0
VG20 -0.05 0 0.05
VG2L -3.5 -2.9 -2.0
VG2H 0.4 0.75 1.0
VG3L -3.5 -2.9 -2.0
VG3H 0.4 0.75 1.0
V
V
V
V
V
V
IB
VOUT
IOUT
GV
fR
VLOV
ILOV
VLBL
0.02
1.75
400
--
1.0
-0.5
0.02
-3.5
-0.01
0.07
1.95
520
46
7.5
--
0.15
-2.75
0
0.25
2.05
650
--
--
VCC-1.8
1.0
-2.5
0.01
µA
V
µA
dB
kHz
V
µA
V
V
Conditions
ID1 to ID3=0
ID1=0,ID2 to ID3=10mA,
VPOL=14V
ID2=0,ID1 to ID3=10mA,
VPOL=15.5V
ID1 to ID3=0, ILB=10mA
ID1 to ID3=0, IHB=10mA
IOUT= 0
IOUT= -200µA
CG=4.7nF, CD=10nF
CG=4.7nF, CD=10nF
VCC=5 to 10V
Tj=-40 to +70°C
ID1=10mA, VPOL=15.5V
ID2=10mA, VPOL=14V
ID3=10mA
VCC=5 to 12V
Tj=-40 to +70°C
VD1=0.5V, VPOL=14V
VD2=0.5V, VPOL=15.5V
ID1=0, VPOL=14V, IGO1=0
ID1=12mA, VPOL=15.5V,
IGO1=-10µA
ID1=8mA, VPOL=15.5V,
IGO1=0
ID2=0, VPOL=15.5V, IGO2=0
ID2=12mA, VPOL=14V, IGO2=-
10µA
ID2=8mA, VPOL=14V, IGO2=0
ID3=12mA, IGO3=-10µA
ID3=8mA, IGO3=0
RF1=150kΩ
RF1=150kΩ
VOUT=1.96V, VFIN=2.1V
f=22kHz,VIN=1mV
V(AC)in=1V p/p sq.w
IL=50mA(LB or HB)
VLOV=0
VLOV=0, IL=-10µA, Enabled
VLOV=3V, IL=0, Enabled
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
http://www.aimtron.com.tw
Fax: 886-3-563-0879
Email: [email protected]
5
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| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet AT1511.PDF ] | |
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