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PDF CHT4012-QDG Data sheet ( Hoja de datos )
| Número de pieza | CHT4012-QDG | |
| Descripción | GaAs Monolithic Microwave IC | |
| Fabricantes | United Monolithic Semiconductors | |
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CHT4012-QDG
RoHS COMPLIANT
DC-6GHz 6-BIT DIGITAL ATTENUATOR
GaAs Monolithic Microwave IC in SMD leadless package
Description
The CHT4012-QDG is a DC-6GHz monolithic
6-bit digital attenuator with a LSB = 0.5dB
offering a high dynamic range and a high
accuracy, the RMS amplitude error is
typically as low as 0.3dB. The circuit provides
low insertion loss 2.5dB associated to input
and output return losses better than 13dB. A
CMOS and TTL compatible interface is
available on chip.
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-6GHz
■ Insertion Loss (state 0): 2.5dB
■ RMS attenuation error: 0.3dB
■ RMS phase variation: 1deg
■ DC bias: V+=5V and V-=-5V
■ No decoupling capacitance on Input and
Output RF accesses
■ 24L-QFN4x4
■ MSL1
UMS
T4012
YYWW
A2 A3 A4 A5 A6 -V
24 23 22 21 20 19
A1 1
18 +V
GND 2
GND 3
Control interface
17 GND
16 GND
RFin 4
GND 5
GND 6
A1 A2 A3 A4 A5 A6
15 RFout
14 GND
13 GND
7 8 9 10 11 12
GND GND
Frequency :
0.5GHz-6GHz
Main Characteristics
Tamb.= +25°C
Symbol
Freq
IL
Rms_att_err
Rms_phivar
Parameter
Frequency range
Insertion Loss
RMS of attenuation error
RMS of phase variation (0.5 to 6GHz)
Min Typ Max Unit
DC 6 GHz
2.5 dB
0.3 dB
1°
Ref. : DSCHT4012-QDG1138 - 18 May 11
1/12
Specifications subject to change without notice
United Monolithic Semiconductors S.A.S.
Route Départementale 128 - BP46 - 91401 Orsay Cedex France
Tel.: +33 (0) 1 69 33 03 08 - Fax: +33 (0) 1 69 33 03 09
1 page  
DC-6GHz 6-BIT DIGITAL ATTENUATOR CHT4012-QDG
Typical Board Measurements
Tamb.= +25°C, V+ = +5V, V- = -5V
Attenuation Error versus Frequency
Attenuation Error versus States
0.5GHz < Frequency < 6Ghz
RMS Attenuation Error versus Frequency
Attenuation versus States
0.5GHz < Frequency < 6Ghz
Ref. : DSCHT4012-QDG1138 - 18 May 11
5/12
Route Départementale 128, BP46 - 91401 ORSAY Cedex - FRANCE
Tel.: +33 (0) 1 69 33 03 08 - Fax: +33 (0) 1 69 33 03 09
Specifications subject to change without notice
5 Page 
DC-6GHz 6-BIT DIGITAL ATTENUATOR CHT4012-QDG
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.
■ Recommended for the implementation of this product on a module board.
■ Decoupling capacitors of 10nF ±10% are recommended for indicated DC accesses.
■ See application note AN0017 for details.
Note
An external capacitance is requested to protect the device from any external DC voltage that
might be present on the RF accesses.
Ref. : DSCHT4012-QDG1138 - 18 May 11
11/12
Route Départementale 128, BP46 - 91401 ORSAY Cedex - FRANCE
Tel.: +33 (0) 1 69 33 03 08 - Fax: +33 (0) 1 69 33 03 09
Specifications subject to change without notice
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet CHT4012-QDG.PDF ] | |
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