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iT20420 Schematic ( PDF Datasheet ) - Iterra

Teilenummer iT20420
Beschreibung 20 to 42 GHz general-purpose amplifier
Hersteller Iterra
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Gesamt 14 Seiten
iT20420 Datasheet, Funktion
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 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
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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






iT20420 Datasheet, Funktion
iTR20420
20-42 GHz General Purpose MMIC
Amplifier
Performance
Data
www.DataSheet4U.com
0
-10
-20
-30
-40
-50
-60
0
Typical Input Return Loss Vs. Frequency
Bias VD=3.5 V, IDQ=350 mA
10 20 30 40
Frequency (GHz)
0
-5
-10
-15
-20
-25
-30
-35
0
Typical Output Return Loss Vs. Frequency
Bias VD=3.5 V, IDQ=350 mA
10 20 30 40
Frequency (GHz)
50
50
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Specifications are based on most current or latest revision.
R3.1. Sept. 13, 2004 Doc. 1316
Page 6 of 14
iTerra Communications
2440-A Embarcadero Way
Palo Alto, CA. 94303

6 Page









iT20420 pdf, datenblatt
iTR20420
20-42 GHz General Purpose MMIC
Amplifier
Application
Information
multiplier
operation
30
20
Conversion
Gain = 0
10
2 x Fo
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0
1 x Fo
-10
-20
-30
20 22 24 26 28 30 32 34 36 38 40 42
Second Harmonic Frequency (GHz)
Figure 3. Measured Doubler Performance.
Odd Harmonic Operation
Odd harmonics are generally associated with a square wave. The iTR20420 is biased in such a way
that causes the clipping of the input sine wave to closely approximate a square wave provided a high
input drive level is maintained. If biased in a manner, which causes the input waveform to be clipped
equally in the positive and negative cycles, then a symmetrical square wave will be approximated
which contains odd harmonics.
As an example, the iTR20420 was biased as a tripler over the 20-40GHz band at selected
frequencies. In this mode of operation all the drains voltages (VD1 and VD2) were tied together and all
the gate voltages were tied together as shown in Figure 4.
VD2
RF IN
Vd1 Vg2 alt
Vd2
Vd3
Vd4
Vg1 Vg2 Vg3 Vg4
RF OUT
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VG1
Figure 4. iTR20420 configured as tripler.
Specifications are based on most current or latest revision.
R3.1. Sept. 13, 2004 Doc. 1316
Page 12 of 14
iTerra Communications
2440-A Embarcadero Way
Palo Alto, CA. 94303

12 Page





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