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PDF CHT4699-QDG Data sheet ( Hoja de datos )
| Número de pieza | CHT4699-QDG | |
| Descripción | GaAs Monolithic Microwave IC | |
| Fabricantes | United Monolithic Semiconductors | |
| Logotipo |  |
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CHT4699-QDG
36-44GHz Variable Attenuator
GaAs Monolithic Microwave IC
Description
The CHT4699-QDG is a monolithic 36-
44GHz Variable Voltage Attenuator.
It is designed for a wide range of
applications, from military to commercial
communication systems.
The circuit is manufactured with a MESFET
process, 0.7µm gate length, via holes
through the substrate, air bridges.
24 23 22 21 20 19
NC 1
GND 2
GND 3
RF IN 4
GND 5
GND 6
18 NC
17 GND
16 GND
15 RF OUT
14 GND
13 GND
7 8 9 10 11 12
Main Features
■ Broadband performances: 36-44GHz
■ Minimum attenuation: 4dB
■ 30dB dynamic range
■ 27dBm input IP3
■ DC bias: -5 to 0V
■ 24L QFN4x4
0
-5
-10 A
-15
-20
-25
B
-30
-35
-40
35
37.5
40 42.5 45
Frequency (GHz)
47.5
50
Main Electrical Characteristics
Tamb.= +25°C
Symbol
Parameter
Freq Frequency range
Min Att Minimum attenuation with V1=V2= -5V
Dyn Dynamic range of attenuation
IIP3 Input IP3 all attenuation
Min Typ Max Unit
36.0
44.0 GHz
-4 dB
30 dB
27 dBm
Ref. : DSCHT4699-QDG2118 - 27 Apr 12
1/12 Specifications subject to change without notice
United Monolithic Semiconductors S.A.S.
Bât. Charmille - Parc SILIC - 10, Avenue du Québec - 91140 VILLEBON-SUR-YVETTE - France
Tel.: +33 (0) 1 69 86 32 00 - Fax: +33 (0) 1 69 86 34 34
1 page  
36-44GHz Variable Attenuator
CHT4699-QDG
Typical Board Measurements
Tamb.= +25°C
Measurements in the package access planes
Gain versus control voltage
0
-5
-10 A
-15
-20
-25
B
-30
A : V1 = -5V to 0V & V2= -5V
-35
B : V1= 0V & V2 = -5V to 0V
-40
35 37.5 40 42.5 45 47.5 50
Frequency (GHz)
S11 versus control voltage
0
-5
S22 versus control voltage
0
-5
-10 -10
-15 -15
-20 -20
V1= -5V, V2= -5V
-25
V1= 0V, V2= 0V
-30
30 32.5 35 37.5 40 42.5 45 47.5 50
Frequency (GHz)
-25 V1= -5V, V2= -5V
V1= 0V, V2= 0V
-30
30 32.5 35 37.5 40 42.5 45 47.5 50
Frequency (GHz)
1-
Ref. : DSCHT4699-QDG2118 - 27 Apr 12
5/12 Specifications subject to change without notice
Bât. Charmille - Parc SILIC - 10, Avenue du Québec - 91140 VILLEBON-SUR-YVETTE - France
Tel.: +33 (0) 1 69 86 32 00 - Fax: +33 (0) 1 69 86 34 34
5 Page 
36-44GHz Variable Attenuator
CHT4699-QDG
Biasing sequence
To obtain good performances in linearity, biasing voltage should be applied as following:
- Control of 1st stage attenuation with V1 from –5V to 0V, with V2 fixed at -5V
- Control of 2nd stage with V2 from -5V to 0V, with V1 fixed at 0V
Voltage
0V
V1
-5V
Min.
V2
Max. Attenuation
This part could be also driven in Single Voltage Control, applying the same voltage from -5V
to 0V on V1 and V2.
Ref. : DSCHT4699-QDG2118 - 27 Apr 12
11/12
Specifications subject to change without notice
Bât. Charmille - Parc SILIC - 10, Avenue du Québec - 91140 VILLEBON-SUR-YVETTE - France
Tel.: +33 (0) 1 69 86 32 00 - Fax: +33 (0) 1 69 86 34 34
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet CHT4699-QDG.PDF ] | |
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