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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
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 70C to suit a wide range of environmental conditions.
Applications
Satellite receiver LNBs Private mobile radio (PMR) Cellular telephones
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: service@aimtron.com.tw 1
AT1511
Preliminary product Information
FET BIAS CONTROLLER AND TONE DETECTION
Block Diagram (a) Drain Voltage & Current Controller
(b)Polarisation Switch
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: service@aimtron.com.tw 2
AT1511
Preliminary product Information
FET BIAS CONTROLLER AND TONE DETECTION
(c)Tone Detection
Pin Descriptions
Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Pin name G1 D1 G2 D2 G3 D3 GND CP CN N.C. VOUT LB HB LOV FOUT N.C. FIN VPOL ICTL VCC Function 1st Gate output voltage Pin 1st Drain output voltage Pin 2nd Gate output voltage Pin 2nd Drain output voltage Pin 3rd Gate output voltage Pin 3rd Drain output voltage Pin Ground Pin Positive OSC output Pin Negative OSC output Pin No connect Pin Negative voltage output Pin Error Amplifier output Pin Error Amplifier inverted output Pin Error Amplifier input Pin Filter input Pin No connect Pin Filter output Pin Polarisation switch controller Pin Drain Current set Resistor connect Pin Supply voltage Pin
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: service@aimtron.com.tw 3
AT1511
Preliminary product Information
FET BIAS CONTROLLER AND TONE DETECTION
Pin Configuration
Ordering Information Part number
AT1511R AT1511R_GRE
Package
SSOP20 SSOP20,Green
Marking
AT1511R AT1511R, date code with one bottom line
Absolute maximum ratings (Ta = 25oC)
Parameter Power supply voltage Supply Current Input Voltage Drain Current Operating temperature Storage temperature Power dissipation Symbol VCC ICC VPOL VD Topr Tstg Pd Limits -0.6~12 100 25 0~15 -40~+70 -50~+85 500 unit V mA V mA o C o C mW
Recommended operating conditions (Ta = 25oC)
Parameter Power supply voltage Symbol VCC Limits 5~10 unit V
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: service@aimtron.com.tw 4
AT1511
Preliminary product Information
FET BIAS CONTROLLER AND TONE DETECTION
Electrical characteristics
(Unless otherwise stated, Ta=25C, VCC=5V, ID=10mA, RCTL=33k) Parameter Symbol Min. Typ. Max. Unit Conditions Supply Voltage VCC 5 -10 V -6 10 mA ID1 to ID3=0 I =0,ID2 to ID3=10mA, -25 35 mA D1 VPOL=14V ID2=0,ID1 to ID3=10mA, Supply Current ICC -25 35 mA VPOL=15.5V -16 25 ID1 to ID3=0, ILB=10mA -16 25 mA ID1 to ID3=0, IHB=10mA -3.5 -3.0 -2.5 V IOUT= 0 Negative Voltage VOUT ---2.4 V IOUT= -200A Drain Output Noise Voltage END --0.02 VPP CG=4.7nF, CD=10nF Gate Output Noise Voltage ENG --0.005 VPP CG=4.7nF, CD=10nF Oscillator Freq. fo 200 350 800 kHz DRAIN Drain Current ID 8 10 12 mA Drain Current Charge with VCC -0.5 -%/V VCC=5 to 10V IDV Drain Current Charge with Tj %/ Tj=-40 to +70C -0.05 -IDT VD1 1.8 2.0 2.2 V ID1=10mA, VPOL=15.5V Drain Voltage VD2 1.8 2.0 2.2 V ID2=10mA, VPOL=14V VD3 1.8 2.0 2.2 V ID3=10mA Drain Voltage Charge with VCC VDV -0.5 -%/V VCC=5 to 12V Drain Voltage Charge with Tj -50 -ppm Tj=-40 to +70C VDT IL1 --10 A VD1=0.5V, VPOL=14V Leakage Current IL2 --10 A VD2=0.5V, VPOL=15.5V GATE Gate Output Current Range IGO -30 -2000 A VG10 -0.05 0 0.05 V ID1=0, VPOL=14V, IGO1=0 ID1=12mA, VPOL=15.5V, VG1L -3.5 -2.9 -2.0 V Gate1 Output Voltage IGO1=-10A ID1=8mA, VPOL=15.5V, 0.4 0.75 1.0 V VG1H IGO1=0 VG20 -0.05 0 0.05 V ID2=0, VPOL=15.5V, IGO2=0 ID2=12mA, VPOL=14V, IGO2=Gate2 Output Voltage VG2L -3.5 -2.9 -2.0 V 10A 0.4 0.75 1.0 V ID2=8mA, VPOL=14V, IGO2=0 VG2H VG3L -3.5 -2.9 -2.0 V ID3=12mA, IGO3=-10A Gate3 Output Voltage VG3H 0.4 0.75 1.0 V ID3=8mA, IGO3=0 TONE DETECTION Input Bias Current IB 0.02 0.07 0.25 A RF1=150k Output Voltage VOUT 1.75 1.95 2.05 V RF1=150k Output Current IOUT 400 520 650 A VOUT=1.96V, VFIN=2.1V Voltage Gain GV -46 -dB f=22kHz,VIN=1mV Rejection Frequency fR 1.0 7.5 -kHz V(AC)in=1V p/p sq.w VCC-1.8 LOV Volt. Range VLOV -0.5 -V IL=50mA(LB or HB) LOV Bias Current ILOV 0.02 0.15 1.0 A VLOV=0 -3.5 -2.75 -2.5 V VLOV=0, IL=-10A, Enabled LB Output Low VLBL -0.01 0 0.01 V 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: service@aimtron.com.tw 5
AT1511
Preliminary product Information
FET BIAS CONTROLLER AND TONE DETECTION
LB Output High HB Output Low HB Output High POLARITY SWITCH Input Current Threshold Voltage Switching Speed IPOL VTPOL TSPOL 10 14 -20 14.75 -40 15.5 100 A V ms VLBH VHBL VHBH -0.025 2.9 -3.5 -0.01 -0.025 2.9 0 3.0 -2.75 0 0 3.0 0.025 3.1 -2.5 0.01 0.025 3.1 V V V V V V VLOV=0, IL=10mA, Disabled VLOV=3V,IL=50mA,Disabled VLOV=0, IL=-10A,Disabled VLOV=3V, IL=0, Disabled VLOV=0, IL=10mA, Enabled VLOV=3V, IL=50mA,Enabled VPOL=25V(Applied via RPOL=10k) VPOL=25V(Applied via RPOL=10k) VPOL=25V(Applied via RPOL=10k)
Test Circuit (a) LOV Connected to ground
(b) LOV Connected to VOSC
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: service@aimtron.com.tw 6
AT1511
Preliminary product Information
FET BIAS CONTROLLER AND TONE DETECTION
Application Circuit
Application Information (a) LOV Connected to ground
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: service@aimtron.com.tw 7
AT1511
Preliminary product Information
FET BIAS CONTROLLER AND TONE DETECTION
(b) LOV Connected to VOSC
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: service@aimtron.com.tw 8
AT1511
Preliminary product Information
FET BIAS CONTROLLER AND TONE DETECTION
Package Outlines : 20-pin SSOP
SYMBOL A A1 A2 b C D E E1 L e y
MILLIMETERS MIN TYP MAX 1.47 1.60 1.73 0.10 0.25 1.37 1.45 1.52 0.23 0.25 0.36 0.19 0.20 0.25 8.53 8.64 8.74 5.79 5.99 6.20 3.81 3.91 3.99 0.38 0.71 1.27 0.64 0.076 0 8
MIN 0.058 0.004 0.054 0.009 0.0075 0.336 0.228 0.150 0.015 0
INCHES TYP 0.063 0.057 0.010 0.008 0.340 0.236 0.154 0.028 0.025 -
MAX 0.068 0.010 0.060 0.014 0.0098 0.344 0.244 0.157 0.050 0.003 8
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: service@aimtron.com.tw 9

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