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.
UMS
T4012
YYWW
A2
24
A1
GND
GND
RFin
GND
GND
1
2
3
4
5
6
7
GND
A1
A3
23
A4
22
A5
21
A6
20
-V
19
18
17
+V
GND
GND
RFout
GND
GND
Control interface
16
A5
A6
A2
A3
A4
15
14
13
8
9
10
11
12
GND
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
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)
1/12
Min
DC
Typ
2.5
0.3
1
Max
6
Unit
GHz
dB
dB
°
Ref. : DSCHT4012-QDG1138 - 18 May 11
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
UMS [ UNITED MONOLITHIC SEMICONDUCTORS ]
