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CHT4012-QDG Schematic ( PDF Datasheet ) - United Monolithic Semiconductors

Teilenummer CHT4012-QDG
Beschreibung GaAs Monolithic Microwave IC
Hersteller United Monolithic Semiconductors
Logo United Monolithic Semiconductors Logo 




Gesamt 12 Seiten
CHT4012-QDG Datasheet, Funktion
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
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






CHT4012-QDG Datasheet, Funktion
CHT4012-QDG DC-6GHz 6-BIT DIGITAL ATTENUATOR
Typical Board Measurements
Tamb.= +25°C, V+ = +5V, V- = -5V
Phase Variation versus Frequency
Phase Variation versus States
0.5GHz < Frequency < 6Ghz
RMS of Phase Variation versus Frequency
Ref. : DSCHT4012-QDG1138 - 18 May 11
6/12
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

6 Page









CHT4012-QDG pdf, datenblatt
CHT4012-QDG DC-6GHz 6-BIT DIGITAL ATTENUATOR
Recommended package footprint
Refer to the application note AN0017 available at http://www.ums-gaas.com for package foot
print recommendations.
SMD mounting procedure
For the mounting process standard techniques involving solder paste and a suitable reflow
process can be used. For further details, see application note AN0017.
Recommended environmental management
Refer to the application note AN0019 available at http://www.ums-gaas.com for
environmental data on UMS package products.
Recommended ESD management
Refer to the application note AN0020 available at http://www.ums-gaas.com for ESD
sensitivity and handling recommendations for the UMS package products.
Ordering Information
QFN 4x4 RoHS compliant package:
CHT4012-QDG/XY
Stick: XY = 20
Tape & reel: XY = 21
Information furnished is believed to be accurate and reliable. However United Monolithic Semiconductors
S.A.S. assumes no responsibility for the consequences of use of such information nor for any infringement of
patents or other rights of third parties which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of United Monolithic Semiconductors S.A.S.. Specifications
mentioned in this publication are subject to change without notice. This publication supersedes and replaces all
information previously supplied. United Monolithic Semiconductors S.A.S. products are not authorised for use
as critical components in life support devices or systems without express written approval from United
Monolithic Semiconductors S.A.S.
Ref. : DSCHT4012-QDG1138 - 18 May 11
12/12
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

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