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PDF CHT3029-QEG Data sheet ( Hoja de datos )

Número de pieza CHT3029-QEG
Descripción DC-31GHz 4Bit Digital Attenuator
Fabricantes United Monolithic Semiconductors　
Logotipo United Monolithic Semiconductors Logotipo



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CHT3029-QEG
DC-31GHz 4Bit Digital Attenuator
GaAs Monolithic Microwave IC in SMD leadless package
Description
The CHT3029-QEG is a very wide band
digital attenuator, which integrates 4 bits with
a LSB of 1dB and provides a dynamic range
of 15dB from DC to 31GHz.
It is designed for a wide range of
applications, from military to commercial
communication systems.
The circuit is manufactured with a pHEMT
process, 0.25µm gate length, via holes
through the substrate, air bridges and
electron beam gate lithography.
It is supplied in RoHS compliant SMD
package.
Main Features
■ Broadband performances: DC-31GHz
■ Insertion Loss: 4dB@20GHz 8dB@31GHz
■ Attenuation step: 1dB
■ Dynamic: 15dB
■ RMS attenuation error: 0.5 dB
■ Return Losses: 12dB
■ DC bias: V+=5V and V-=-5V
■ No internal DC Block at Input and
Output RF accesses
■ QFN 4x5
Main Electrical Characteristics
Tamb.= +25°C
Symbol
Parameter
Freq
Frequency range
IL Insertion Loss
@20GHz
@31GHz
Rms_att_er RMS of attenuation error
Dyn Dynamic
Min
DC
Typ Max Unit
31 GHz
4.0 dB
8.0 dB
0.5 dB
15 dB
Ref. : DSCHT3029-QEG5357 - 23 Dec 15
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 - www.ums-gaas.com

1 page




CHT3029-QEG pdf
DC-31GHz 4Bit Digital Attenuator
CHT3029-QEG
Typical Package Sij parameters
Tamb.= +25°C, V+=-5V / V-=-5V State 0
Freq
S11 PhS11 S12
(GHz) (dB) (°) (dB)
2.0 -16.5 -62.8 -2.2
3.0 -15.8 -85.7 -2.3
4.0 -15.6 -104.2 -2.3
5.0 -15.6 -119.4 -2.5
6.0 -15.7 -133.8 -2.5
7.0 -16.2 -148.2 -2.6
8.0 -16.8 -164.7 -2.7
9.0 -17.5 175.1 -2.8
10.0
-18.9 151.6 -2.9
11.0
-23.2 141.5 -3.0
12.0
-26.5 113.1 -3.1
13.0
-28.4 75.8
-3.2
14.0
-32.2 49.5
-3.3
15.0
-50.3 -33.2 -3.4
16.0
-30.1 -177.6 -3.6
17.0
-22.6 165.6 -3.8
18.0
-18.3 146.4 -4.1
19.0
-15.3 127.4 -4.4
20.0
-14.1 112.4 -4.6
21.0
-13.9 100.6 -4.8
22.0
-14.3 92.4
-4.9
23.0
-15.3 89.1
-5.1
24.0
-16.9 91.8
-5.3
25.0
-18.4 101.0 -5.4
26.0
-19.4 119.0 -5.7
27.0
-18.8 137.2 -6.0
28.0
-17.2 149.7 -6.2
29.0
-16.0 153.3 -6.5
30.0
-16.7 150.7 -7.0
31.0
-19.9 -177.5 -8.0
PhS12
(°)
-52.9
-78.8
-104.3
-130.5
-155.7
178.8
153.1
127.1
101.1
74.7
49.1
22.8
-3.6
-29.8
-56.2
-82.8
-109.4
-135.5
-161.7
172.2
145.2
118.1
90.6
63.0
35.1
7.2
-21.2
-50.9
-81.9
-111.7
S21
(dB)
-2.1
-2.2
-2.3
-2.4
-2.5
-2.7
-2.7
-2.7
-2.8
-3.0
-3.0
-3.2
-3.3
-3.5
-3.6
-3.8
-4.0
-4.3
-4.6
-4.7
-4.8
-5.0
-5.2
-5.5
-5.6
-6.0
-6.2
-6.5
-7.0
-8.1
PhS21
(°)
-52.7
-78.7
-103.8
-130.3
-155.8
178.6
153.2
126.5
101.1
75.5
49.1
23.0
-3.1
-29.4
-56.2
-83.4
-109.3
-135.2
-161.7
171.8
145.3
117.8
90.9
63.5
35.0
7.3
-20.6
-51.1
-81.9
-111.4
S22
(dB)
-17.8
-18.5
-18.8
-19.0
-18.4
-17.9
-17.9
-18.4
-20.0
-21.8
-25.1
-29.9
-31.7
-27.3
-23.1
-19.3
-16.7
-14.5
-14.0
-14.0
-15.2
-17.3
-18.9
-18.7
-17.0
-15.9
-13.6
-11.5
-9.8
-8.8
PhS22
(°)
-55.8
-78.0
-93.0
-105.8
-119.7
-135.4
-153.2
-172.6
170.5
128.9
114.5
116.6
155.0
171.5
172.3
162.5
145.7
130.5
107.7
88.3
71.1
59.5
54.9
52.6
27.2
-13.8
-47.1
-79.6
-105.0
-125.6
Ref. : DSCHT3029-QEG5357 - 23 Dec 15
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 - www.ums-gaas.com

5 Page





CHT3029-QEG arduino
DC-31GHz 4Bit Digital Attenuator
CHT3029-QEG
Evaluation mother board
■ Compatible with the proposed footprint.
■ Based on typically Ro4003 / 8mils or equivalent.
■ Using a micro-strip to coplanar transition to access the package.
■ See application note AN0017 for details.
Recommended assembly table
Label
RF IN
RF OUT
A1
A2
A3
A4
V+
V-
Pad
number
6
14
3
2
1
24
16
17
Decoupling
Comment
External DC block must be used Input and Output
to ensure DC decoupling
accesses
Not required
Bit control pads
10nF
10nF
Positive Supply
Negative Supply
RF
Ref. : DSCHT3029-QEG5357 - 23 Dec 15
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 - www.ums-gaas.com

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