Document
CHA2411-QDG
RoHS COMPLIANT
20-25GHz LNA
GaAs Monolithic Microwave IC In QFN package
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Description
The CHA2411 is a monolithic Low noise Amplifier in K band providing 26 dB gain from a single bias supply +5V with a noise figure of 2.5 dB. All the active devices are self biased on chip. The circuit is manufactured with a standard GaAs PHEMT process: 0.25µm gate length, via holes through the substrate, air bridges and electron beam gate lithography. The chip is delivered in a 24 Leads RoHS compliant QFN4x4 package.
Functional diagram
Main Features
n n n n
n
•
Excellent noise figure : 2.5 dB Stable gain vs temperature 26 ± 2dB Single supply : +5V Devices self biased on chip Standard SMD package : QFN 24L 4x4
Plastic Package
Main Characteristics in QFN package
Tamb = +25°C Parameters Frequency range Small signal Gain SSB Noise figure Input / Output Return Loss Min 20 22 26 2.5 15 Typ Max 25 30 Unit GHz dB dB dB
ESD Protection : Electrostatic discharge sensitive device. Observe handling precautions !
Ref. : DSCHA2411QDG6174 - 23 Jun 06
1/10
Specifications subject to change without notice
United Monolithic Semiconductors S.A.S.
Route Départementale 128 - B.P.46 - 91401 Orsay Cedex France Tel. : +33 (0)1 69 33 03 08 - Fax : +33 (0)1 69 33 03 09
K-band LNA
CHA2411-QDG
Electrical Characteristics
Full temperature range
Symbol/Pins Frequency range Parameters Small signal Gain Gain variation over frequency Gain variation over temperature SSB Noise figure Input / Output Return Loss (20 to 23GHz) Input Power at 1 dB Gain Compression @24GHz Input IP3 @24GHz Saturated Output Power @24GHz +Vd, +Vg +I Top Supply Voltage Supply Current Operating temperature range -40 Min 20 22 26 ± 0.5 ±2 2.5 15 -14 -7.5 13.5 5 43 25 55 100 15 Typ Max 25 30 Unit GHz dB dB dB dB dB dBm dBm dBm V mA °C
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Remark :
These performance has been obtained with the chip in QFN package mounted on the recommended boards (ref. 95541 & 95581) described in the document. These performance are highly dependent on this environment.
Absolute Maximum Ratings (1)
Symbol +Vg, +Vd +I Pin Top Tstg Parameters Maximum positive supply voltage Maximum positive supply voltage Maximum peak input power overdrive Operating temperature range (2) Storage temperature range Values 6 65 -5 -40 to +100 -55 to +125 Unit V mA dBm °C °C
(1) Operation of this device above anyone of these parameters may cause permanent damage. Duration < 1s (2) Temperature of the back side of the QFN. Thermal resistance is RTh=195°C/W
Ref. : DSCHA2411QDG6174 - 23 Jun 06
2/10
Specifications subject to change without notice
Route Départementale 128 , B.P.46 - 91401 ORSAY Cedex - FRANCE Tel.: +33 (0)1 69 33 03 08 - Fax : +33 (0)1 69 33 03 09
K-band LNA
CHA2411-QDG
Typical QFN measurements on board 95581 (QFN plan)
Typical Sij Parameters vs Frequency in the QFN package plans
35 30 25 20
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15
S21(dB) S11(dB) S22(dB)
Sij (dB)
10 5 0 -5 -10 -15 -20 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27
28
29
30
Frequency (GHz)
Ref. : DSCHA2411QDG6174 - 23 Jun 06
3/10
Specifications subject to change without notice
Route Départementale 128 , B.P.46 - 91401 ORSAY Cedex - FRANCE Tel.: +33 (0)1 69 33 03 08 - Fax : +33 (0)1 69 33 03 09
K-band LNA
CHA2411-QDG
Typical QFN measurements on board 95541 (QFN plan)
Noise Figure vs Frequency
4 3,8 3,6 3,4 3,2 3 2,8 2,6 2,4 2,2 2 1,8 1,6 1,4 1,2 1 22 22,5 23 23,5 24 24,5
100°C
NF (dB)
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25°C
-40°C
25
25,5
26
Frequency (GHz)
Gain vs Frequency
30 28 26 24 Gain (dB) 22 20 18 16 14 12 10 16 17 18 19 20 21 22 23 24 25 26 Frequency (GHz)
25°C -40°C
100°C
Ref. : DSCHA2411QDG6174 - 23 Jun 06
4/10
Specifications subject to change without notice
Route Départementale 128 , B.P.46 - 91401 ORSAY Cedex - FRANCE Tel.: +33 (0)1 69 33 03 08 - Fax : +33 (0)1 69 33 03 09
K-band LNA
CHA2411-QDG
QFN Outline
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Ref. : DSCHA2411QDG6174 - 23 Jun 06
5/10
Specifications subject to change without notice
Route Départementale 128 , B.P.46 - 91401 ORSAY Cedex - FRANCE Tel.: +33 (0)1 69 33 03 08 - Fax : +33 (0)1 69 33 03 09
K-band LNA
CHA2411-QDG
Pin-out description
Pin number 4 15 Pin name RFIn RFOut VD VG GND Nc Symbol Name RF_IN RF_OUT +Vd +Vg Control Voltage port RF1 Input/Output ports Positive Drain supply voltage Positive Gate supply voltage Ground Not connected Description
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22 9 3, 5, 14, 16
1, 2, 6, 7, 8, 10, 11, 12, 13, 17, 18, 19, 20, 21, 23, 24
External Components and bias configuration (recommended)
19 18 17 16 15 14 13 12
20
21
22
23
24 1 2 3 4 5 6
11
10
9
8
7
Ref. : DSCHA2411QDG6174 - 23 Jun 06
6/10
Specifications subject to change without notice
Route Départementale 128 , B.P.46 - 91401 ORSAY Cedex - FRANCE Tel.: +33 (0)1 69 33 03 08 - Fax : +33 (0)1 69 33 03 09
K-band LNA
CHA2411-QDG
Recommended Test Fixture (Ref. 95541) for measurements over Temperature Range
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Ref. : DSC.