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PDF AT1512 Data sheet ( Hoja de datos )
| Número de pieza | AT1512 | |
| Descripción | FET BIAS CONTROLLER AND TONE DETECTION | |
| Fabricantes | Aimtron Technology | |
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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
Applications
˙Satellite receiver LNBs
˙Private mobile radio (PMR)
˙Cellular telephones
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 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
Fax: 886-3-563-0879
WWW:http://www.aimtron.com.tw
2005/10/19 REV:1.0
Email: [email protected]
1
1 page  
AT1512
Preliminary product Information
FET BIAS CONTROLLER AND TONE DETECTION
Electrical characteristics
Parameter
(Unless otherwise stated, Ta=25°C, VCC=5V, ID=10mA, RCTL=33kΩ)
Symbol Min. Typ. Max. Unit
Conditions
Supply Voltage
Supply Current
Negative Voltage
Drain Output Noise Voltage
Gate Output Noise Voltage
Oscillator Freq.
VCC
ICC
VOUT
END
ENG
fo
5
--
--
--
--
--
-3.5
--
--
--
200
-- 10 V
6 15 mA ID1 to ID3=0
25
35
mA
ID1=0,ID2 to ID3=10mA,
VPOL=14V
25
35
mA
ID2=0,ID1 to ID3=10mA,
VPOL=15.5V
16 25
ID1 to ID3=0, ILB=10mA
16 25 mA ID1 to ID3=0, IHB=10mA
-3.0 -2.5
V IOUT= 0
-- -2.4 V IOUT= -200µA
-- 0.02 VPP CG=4.7nF, CD=10nF
-- 0.005 VPP CG=4.7nF, CD=10nF
350 800 kHz
DRAIN
Drain Current
ID 8 10 12 mA
Drain Current Charge with VCC ∆IDV -- 0.5 -- %/V VCC=5 to 10V
Drain Current Charge with Tj ∆IDT -- 0.05 -- %/℃ Tj=-40 to +70°C
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 ∆VDT -- 50 -- ppm Tj=-40 to +70°C
Leakage Current
IL1 -- -- 10 µA VD1=0.5V, VPOL=14V
IL2 -- -- 10 µA VD2=0.5V, VPOL=15.5V
GATE
Gate Output Current Range
Gate1 Output Voltage
Gate2 Output Voltage
Gate3 Output Voltage
TONE DETECTION
IGO -30
-- 2000
VG10 -0.05 0 0.05
VG1L -3.5 -2.9 -2.0
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
µA
V ID1=0, VPOL=14V, IGO1=0
V
ID1=12mA, VPOL=15.5V,
IGO1=-10µA
V
ID1=8mA, VPOL=15.5V,
IGO1=0
V ID2=0, VPOL=15.5V, IGO2=0
V
ID2=12mA, VPOL=14V,
IGO2=-10µA
V ID2=8mA, VPOL=14V, IGO2=0
V ID3=12mA, IGO3=-10µA
V ID3=8mA, IGO3=0
Input Bias Current
Output Voltage
Output Current
Voltage Gain
Rejection Frequency
LOV Volt. Range
LOV Bias Current
LB Output Low
LB Output High
IB 0.02 0.07 0.25 µA RF1=150kΩ
VOUT 1.75 1.95 2.05 V RF1=150kΩ
IOUT 400 520 650 µA VOUT=1.96V, VFIN=2.1V
GV -- 46 -- dB f=22kHz,VIN=1mV
fR 1.0 7.5 -- kHz V(AC)in=1V p/p sq.w
VLOV -0.5
-- VCC-1.8 V IL=50mA(LB or HB)
ILOV 0.02 0.15 1.0 µA VLOV=0
VLBL
-3.5 -2.75
-0.01 0
-2.5
0.01
V VLOV=0, IL=-10µA, Enabled
V VLOV=3V, IL=0, Enabled
VLBH
-0.025
2.9
0
3.0
0.025
3.1
V VLOV=0, IL=10mA, Disabled
V VLOV=3V,IL=50mA,Disabled
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: [email protected]
5
5 Page 
Reflow Profiles
AT1512
Preliminary product Information
FET BIAS CONTROLLER AND TONE DETECTION
Profile Feature
Average ramp-up rate
(TL to TP)
Sn-Pb Eutectic Assembly
Large Body
Pkg. thickness
≥2.5mm or Pkg.
volume ≥350mm3
Small Body
Pkg. thickness
<2.5mm or Pkg.
volume <350mm3
3°C/second max.
Pb-Free Assembly
Large Body
Pkg. thickness
Small Body
Pkg. thickness
≥2.5mm or Pkg. ≥2.5mm or Pkg.
volume ≥350mm3 volume ≥350mm3
3°C/second max.
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 5°C of actual Peak
Temperature (tP)
Ramp-down Rate
Time 25°C to Peak Temperature
100°C
150°C
60-120 seconds
183°C
60-150 seconds
225+0/-5°C
10-30 seconds
240+0/-5°C
10-30 seconds
6°C/second max.
6 minutes max.
150°C
200°C
60-180 seconds
3°C/second max.
217°C
60-150 seconds
245+0/-5°C
10-30 seconds
250+0/-5°C
20-40 seconds
3°C/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: [email protected]
11
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet AT1512.PDF ] | |
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