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AT1512
Preliminary product Information
FET BIAS CONTROLLER AND TONE DETECTION
Features
*Provides bias for GaAs and HEMT FETs *Drives up to 3 FETs with Dynamic FET protection *Regulated negative rail generator requires only 2 external capacitors *Drain current set by external resistor *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-20 surface mount package
Description
The AT1512 includes bias circuits to drive up to 3 external FETs. A control input to the device selects either one of two FETs as operational using 0V gate switching topology, 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 AT1512 is user selectable over the range from 0 to 15mA, this is achieved with the addition of a single resistor. The series also offers the choice of FET drain voltage, the AT1512 gives 2V. 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 AT1512 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 Fax: 886-3-563-0879 WWW:http://www.aimtron.com.tw 2005/10/19 REV:1.0 Email: service@aimtron.com.tw 1
AT1512
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 Fax: 886-3-563-0879 WWW:http://www.aimtron.com.tw 2005/10/19 REV:1.0 Email: service@aimtron.com.tw 2
AT1512
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 Fax: 886-3-563-0879 WWW:http://www.aimtron.com.tw 2005/10/19 REV:1.0 Email: service@aimtron.com.tw 3
AT1512
Preliminary product Information
FET BIAS CONTROLLER AND TONE DETECTION
Pin Configuration
Ordering Information Part number
AT1512R AT1512R_GRE
Package
SSOP20 SSOP20,Green
Marking
AT1512R AT1512R,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 Fax: 886-3-563-0879 WWW:http://www.aimtron.com.tw 2005/10/19 REV:1.0 Email: service@aimtron.com.tw 4
AT1512
Preliminary product Information
FET BIAS CONTROLLER AND TONE DETECTION
Electrical characteristics
Parameter Supply Voltage (Unless otherwise stated, Ta=25C, VCC=5V, ID=10mA, RCTL=33k) Symbol Min. Typ. Max. Unit Conditions VCC 5 -10 V -6 15 mA ID1 to ID3=0 I =0,ID2 to ID3=10mA, -25 35 mA D1 VPOL=14V ICC I =0,ID1 to ID3=10mA, -25 35 mA D2 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 VOUT ---2.4 V IOUT= -200A END --0.02 VPP CG=4.7nF, CD=10nF ENG --0.005 VPP CG=4.7nF, CD=10nF fo 200 350 800 kHz ID IDV IDT VD1 VD2 VD3 VDV VDT IL1 IL2 IGO VG10 VG1L VG1H VG20 Gate2 Output Voltage VG2L VG2H VG3L VG3H IB VOUT IOUT GV fR VLOV ILOV VLBL VLBH 8 --1.8 1.8 1.8 -----30 -0.05 -3.5 0.4 -0.05 -3.5 0.4 -3.5 0.4 0.02 1.75 400 -1.0 -0.5 0.02 -3.5 -0.01 -0.025 2.9 10 0.5 0.05 2.0 2.0 2.0 0.5 50 ---0 -2.9 0.75 0 -2.9 0.75 -2.9 0.75 12 --2.2 2.2 2.2 --10 10 2000 0.05 -2.0 1.0 0.05 -2.0 1.0 -2.0 1.0 mA %/V %/ V V V %/V ppm A A A V V V V V V V V A V A dB kHz V A V V V V
Supply Current
Negative Voltage Drain Output Noise Voltage Gate Output Noise Voltage Oscillator Freq. DRAIN Drain Current
Drain Current Charge with VCC
Drain Current Charge with Tj Drain Voltage
Drain Voltage Charge with VCC
Drain Voltage Charge with Tj Leakage Current GATE Gate Output Current Range
VCC=5 to 10V Tj=-40 to +70C ID1=10mA, VPOL=15.5V ID2=10mA, VPOL=14V ID3=10mA VCC=5 to 12V Tj=-40 to +70C VD1=0.5V, VPOL=14V VD2=0.5V, VPOL=15.5V
Gate1 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 LB Output High
ID1=0, VPOL=14V, IGO1=0 ID1=12mA, VPOL=15.5V, IGO1=-10A ID1=8mA, VPOL=15.5V, IGO1=0 ID2=0, VPOL=15.5V, IGO2=0 ID2=12mA, VPOL=14V, IGO2=-10A ID2=8mA, VPOL=14V, IGO2=0 ID3=12mA, IGO3=-10A ID3=8mA, IGO3=0 RF1=150k RF1=150k 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=-10A, Enabled VLOV=3V, IL=0, Enabled VLOV=0, IL=10mA, Disabled VLOV=3V,IL=50mA,Disabled
0.07 0.25 1.95 2.05 520 650 46 -7.5 -VCC-1.8 -0.15 1.0 -2.75 -2.5 0 0.01 0 0.025 3.0 3.1
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C. Tel: 886-3-563-0878 Fax: 886-3-563-0879 WWW:http://www.aimtron.com.tw 2005/10/19 REV:1.0 Email: service@aimtron.com.tw 5
AT1512
Preliminary product Information
FET BIAS CONTROLLER AND TONE DETECTION
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 VPOL=25V(Applied via RPOL=10k) VPOL=25V(Applied via RPOL=10k) VPOL=25V(Applied via RPOL=10k) VHBL VHBH -3.5 -0.01 -0.025 2.9 -2.75 0 0 3.0 -2.5 0.01 0.025 3.1 V V V V VLOV=0, IL=-10A,Disabled VLOV=3V, IL=0, Disabled VLOV=0, IL=10mA, Enabled VLOV=3V, IL=50mA,Enabled
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C. Tel: 886-3-563-0878 Fax: 886-3-563-0879 WWW:http://www.aimtron.com.tw 2005/10/19 REV:1.0 Email: service@aimtron.com.tw 6
AT1512
Preliminary product Information
FET BIAS CONTROLLER AND TONE DETECTION
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 Fax: 886-3-563-0879 WWW:http://www.aimtron.com.tw 2005/10/19 REV:1.0 Email: service@aimtron.com.tw 7
AT1512
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 Fax: 886-3-563-0879 WWW:http://www.aimtron.com.tw 2005/10/19 REV:1.0 Email: service@aimtron.com.tw 8
AT1512
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 Fax: 886-3-563-0879 WWW:http://www.aimtron.com.tw 2005/10/19 REV:1.0 Email: service@aimtron.com.tw 9
AT1512
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 Fax: 886-3-563-0879 WWW:http://www.aimtron.com.tw 2005/10/19 REV:1.0 Email: service@aimtron.com.tw 10
AT1512
Preliminary product Information
FET BIAS CONTROLLER AND TONE DETECTION
Reflow Profiles
Profile Feature
Average ramp-up rate (TL to TP) Preheat -Temperature Min(Tsmin) -Temperature Max (Tsmax) -Time (min to max)(ts) Tsmax to TL -Ramp-up Rate Time maintained above: -Temperature (TL) -Time (tL) Peak Temperature(TP) Time within 5C of actual Peak Temperature (tP) Ramp-down Rate Time 25C to Peak Temperature
Sn-Pb Eutectic Assembly Large Body Small Body Pkg. thickness Pkg. thickness <2.5mm or Pkg. 2.5mm or Pkg. 3 volume 350mm3 volume <350mm 3C/second max.
Pb-Free Assembly Large Body Small Body Pkg. thickness Pkg. thickness 2.5mm or Pkg. 2.5mm or Pkg. volume 350mm3 volume 350mm3 3C/second max.
100C 150C 60-120 seconds
150C 200C 60-180 seconds 3C/second max.
183C 60-150 seconds 225+0/-5C 10-30 seconds 240+0/-5C 10-30 seconds
217C 60-150 seconds 245+0/-5C 10-30 seconds 250+0/-5C 20-40 seconds
6C/second max. 6 minutes max.
3C/second max. 8 minutes max.
*All temperatures refer to topside of the package, measured on the package body surface.
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C. Tel: 886-3-563-0878 Fax: 886-3-563-0879 WWW:http://www.aimtron.com.tw 2005/10/19 REV:1.0 Email: service@aimtron.com.tw 11

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