CHR3894-98F
RoHS COMPLIANT
37-40GHz Integrated Down Converter
GaAs Monolithic Microwave IC
Description
The CHR3894-98F is a multifunction
monolithic receiver, which integrates a
balanced cold fet mixer, a LO chain with
buffers associated to a time two multiplier,
and a RF low noise amplifier including gain
control.
It is designed for a wide range of
applications, from military to commercial
communication systems.
The circuit is manufactured with a pHEMT
process, 0.15µm gate length, via holes
through the substrate, air bridges and
electron beam gate lithography.
It is available in chip form.
LO IN
IF_I
VGX
IF_Q
X2
VD
VD1
VGL
GC
RF IN
Main Features
■ Broadband performances: 37-40GHz
■ 13dB Conversion gain
■ 16dBc Image Rejection
■ 2dBm IIP3 without attenuation (GC=-2V)
■ 8dB Gain Control range
■ 4.5dB Noise Figure for IF>0.1GHz
■ 0dBm LO input Power
■ DC bias: Vd=4V @ Id=250mA
■ Chip size 2.6x2.7x0.1mm
Conversion gain (USB mode) @ IF 2GHz
20
18
Conversion gain (dB)
16
14
12
10
8
6
4
2
0
35
36
37
38
39
40
41
42
43
44
-2V
-0.4V
-0.2V
0V
+0.6V
RF Frequency (GHz)
Main Characteristics
Tamb.= +25°C
Symbol
Parameter
F
RF
RF frequency range
F
OL
LO frequency range
F
IF
IF frequency range
G
Conversion gain without attenuation
Min
37
17.5
DC
Typ
Max
40
21.0
3.5
Unit
GHz
GHz
GHz
dB
13
Ref. : DSCHR38941192 - 11 Jul 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
UMS [ UNITED MONOLITHIC SEMICONDUCTORS ]
