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PDF iT20420 Data sheet ( Hoja de datos )
| Número de pieza | iT20420 | |
| Descripción | 20 to 42 GHz general-purpose amplifier | |
| Fabricantes | Iterra | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de iT20420 (archivo pdf) en la parte inferior de esta página. Total 14 Páginas | ||
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iTR20420
20-42 GHz General Purpose MMIC
Amplifier
Description
The iTR20420 is a broadband general purpose driver amplifier designed for use in point to point
radio, point to multi-point communications, LMDS, SatCom and other millimeter wave applications.
The iTR20420 is a fully matched GaAs MMIC utilizing an advanced 0.15µm gate length PHEMT
process.
Features
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Wideband 20 - 42 GHz operation
22 dB small signal gain (typ.)
23 dBm saturated power output (typ.)
RF input/output internally matched to 50 Ohms
Optional bonding configuration for multiplier applications
Chip Size 1.720 mm x 0.760 mm x 50 µm
Absolute
Ratings
Parameter
Positive DC Voltage (+3.5 V Typical)
Negative DC Voltage
Simultaneous (VD - VG)
Positive DC Current
RF Input Power (from 50 Ω source)
Operating Base Plate Temperature
Storage Temperature Range
Thermal Resistance
(Channel to Backside)
Symbol
VD
VG
VDG
ID
Pin
Tc
Tstg
Rjc
Value
+5
-2
+7
600
15
-30 to +85
-55 to +125
57
Unit
Volts
Volts
Volts
mA
dBm
°C
°C
°C/W
Electrical
Characteristics1
Parameter
Min Typ
Frequency Range
Drain Supply Voltage (VD)
Gate Supply Voltage (VG)2
Small Signal Gain3
(f=20-22 GHz)
(f=22-42 GHz)
Gain Variation vs.
Frequency
Power Output at
1 dB Compression
20
2
-2
18
20
3.5
-0.6
20
22
+/-2.5
21
Max Unit
42 GHz
5V
-0.15 V
dB
dB
dB
dBm
Parameter
Min Typ Max Unit
Power Output Saturated4
Drain Current at
P1dB Compression
Drain Current at Psat
Input Return Loss
(Pin=-20 dBm)
Output Return Loss
(Pin=-20 dBm)
22
23
355
362
12
10
dBm
mA
mA
dB
dB
www.iterrac.com
Notes:
1. Operated at 25 °C, 50 Ohm system, VD=+3.5 V, quiescent current (IDQ)=350 mA.
2. Typical range of the negative gate voltage is -0.9 to –0.15 V to set typical IDQ of 350 mA.
3. Production measurements for small signal gain are made over a frequency range of 20 to 40 GHz.
4. Saturated power measurements are not 100% tested, but guaranteed by design.
Specifications are based on most current or latest revision.
R3.1. Sept. 13, 2004 Doc. 1316
Page 1 of 14
iTerra Communications
2440-A Embarcadero Way
Palo Alto, CA. 94303
1 page  
iTR20420
20-42 GHz General Purpose MMIC
Amplifier
Performance
Data
normal
amplifier
configuration
www.DataSheet4U.com
Typical SS Gain Vs. Frequency Vs. Supply Current
Bias VD=3.5
35
30
25
20
15
10
5
0
-5
-10
-15
-20
-25
-30
-35
-40
0
300 mA
200 mA
350 mA 400 mA
10 20 30 40
Frequency (GHz)
50
Typical Output Power @ 1dB Compression
Bias VD=3.5 V, IDQ=350 mA
30
25
20
15
10
5
0
20 22 24 26 28 30 32 34 36 38 40 42
Frequency (GHz)
www.iterrac.com
Specifications are based on most current or latest revision.
R3.1. Sept. 13, 2004 Doc. 1316
Page 5 of 14
iTerra Communications
2440-A Embarcadero Way
Palo Alto, CA. 94303
5 Page 
iTR20420
20-42 GHz General Purpose MMIC
Amplifier
Application
Information
multiplier
operation
Even Harmonic Operation
Even harmonics are generated whenever the symmetry of the input signal waveform is distorted.
This is accomplished by biasing the first stage operating point in a region of the I-V curve where the
device is near pinch-off. In this condition, the first stage becomes a half wave rectifier where
conduction only occurs on positive half cycles of the input waveform. Thus, presenting an
asymmetrical waveform consisting mainly of positive half cycles which is rich in even harmonics to
the remaining stages of the amplifier.
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For most even harmonic multiplier operations, the first stage is usually pinched off and the remaining
stages are biased as a linear amplifier. As an example, the iTR20420 was evaluated as a doubler.
In the doubler operation, two drain voltages of +3.5V were used: One for first stage (VD1) and the
other (VD2) for the remaining 3 stages tied together as shown in Figure 2. Independent biasing of the
first stage was achieved by using two separate gate voltages. VG1 was used for stage one and set to
VG1=-1.0V (near pinch-off). VG2 was used for the remaining three stages. VG2 was adjusted until
IDQ=330mA.
VD1 VD2
RF IN
Vd1 Vg2 alt
Vd2
Vd3
Vd4
Vg1 Vg2 Vg3 Vg4
RF OUT
VG2
Figure 2. iTR20420 configured as doubler.
VG1
For each input frequency and input power level, VG1 was adjusted to peak the second harmonic.
Small changes in VG2 and VD2 at this point help in suppressing odd harmonics. Figure 3 shows the
doubler performance over the 20 to 42 GHz band for a fixed input power level of +12 dBm. The
graph shows doubled frequencies with output power levels greater than +16dBm over the 20-42 GHz
band. The graph also shows the increasing power level of the fundamental at the higher end of the
band since the fundamental frequency approaches the lower band edge of the amplifier passband.
Based on these measurements the iTR20420 can be used a doubler to give desired frequencies
anywhere in the 20-42 GHz band with a conversion gain up to 8 dB and second harmonic power
levels up to 20 dBm.
www.iterrac.com
Specifications are based on most current or latest revision.
R3.1. Sept. 13, 2004 Doc. 1316
Page 11 of 14
iTerra Communications
2440-A Embarcadero Way
Palo Alto, CA. 94303
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet iT20420.PDF ] | |
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