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CHR3894-QEG Schematic ( PDF Datasheet ) - United Monolithic Semiconductors

Teilenummer CHR3894-QEG
Beschreibung Integrated Down Converter
Hersteller United Monolithic Semiconductors
Logo United Monolithic Semiconductors Logo 




Gesamt 14 Seiten
CHR3894-QEG Datasheet, Funktion
CHR3894-QEG
37-40GHz Integrated Down Converter
GaAs Monolithic Microwave IC in SMD leadless package
Description
The CHR3894-QEG 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 supplied in RoHS compliant SMD
package.
UMS
R3894
YYWW
Main Features
■ Broadband performances: 37-40GHz
■ 13dB Conversion gain
■ 15dBc Image Rejection
■ 2dBm IIP3 without attenuation (GC=-2V)
■ 8dB Gain Control range
■ 4dB Noise Figure for IF>0.1GHz
■ 0dBm LO input Power
■ DC bias: Vd=4V @ Id=250mA
■ 24L-QFN4x5
■ MSL1
20
18
16
14
12
10
8
6
4
2
0
35
Conversion gain (USB mode) @ IF 2GHz
-2V
36
-0.4V
-0.2V
0V
37 38 39
RF Frequency (GHz)
+0.6V
40
41
Main Electrical Characteristics
Tamb.= +25°C
Symbol
Parameter
FRF RF frequency range
FLO LO frequency range
FIF IF frequency range
G Conversion gain without attenuation
Min Typ Max Unit
37 40 GHz
17.5
21.0 dB
DC 3.5 dB
10 13
dBm
Ref. : DSCHR3894-QEG2201 -19 jul 12
1/14 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
Free Datasheet http://www.datasheet4u.com/






CHR3894-QEG Datasheet, Funktion
CHR3894-QEG
37-40GHz Integrated Down Converter
Typical Board Measurements
Tamb.= +25°C, VD = VD1 = +4V, VGL = -0.1V, VGX = -0.9V, P_LO = 0dBm (IDt = 250mA)
Noise figure versus RF frequency at IF 2GHz (USB & LSB modes)
without attenuation: GC= -2V
10
9
8
7
6
5
4
3
2
1
USB
LSB
0
35 36 37 38 39 40 41
RF Frequency (GHz)
Noise figure versus gain control range (IF 2GHz, USB mode)
10
9
8
7
6
5
4
3
2
1 -2V -0.2V 0V +0.6V
0
35 36 37 38 39 40 41
RF Frequency (GHz)
42
42
Ref. : DSCHR3894-QEG2201 -19 jul 12
6/14 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
Free Datasheet http://www.datasheet4u.com/

6 Page









CHR3894-QEG pdf, datenblatt
CHR3894-QEG
37-40GHz Integrated Down Converter
Notes
Due to ESD protection circuits on RF input and output, an external capacitance might be
requested to isolate the product from external voltage that could be present on the RF
accesses.
NC
NC
NC
GND
RF IN
GND
NC
NC
NC
GND
LO IN
GND
NC
NC
ESD protections are also implemented on gate and control accesses.
The DC connections do not include any decoupling capacitor in package, therefore it is
mandatory to provide a good external DC decoupling (10nF) on the PC board, as close as
possible to the package.
Ref. : DSCHR3894-QEG2201 -19 jul 12
12/14
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
Free Datasheet http://www.datasheet4u.com/

12 Page





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