CHR3694-QDG
RoHS COMPLIANT
37-40GHz Integrated Down converter
GaAs Monolithic Microwave IC in SMD package
Description
The CHR3694-QDG is a multifunction chip,
which integrates a balanced cold FET mixer, a
time two multiplier, and a RF LNA including
gain control.
It is designed for a wide range of applications,
typically commercial communication systems.
The circuit is manufactured with a pHEMT
process, 0.25µm gate length, via holes through
the substrate and air bridges.
It is available in lead-free SMD package.
A mirror version versus RF & LO access is
available as CHR3794-QDG.
UMS
R3694
A3688A
A3667A
YYWW
YYWWG
Conversion gain (Sup. Mode) @ IF=2GHz
20
18
16
14
12
10
8
6
4
2
0
36
Main Features
■
Broadband performance 37-40GHz
■
12dB Gain
■
15dBc Image Frequency Rejection
■
-5dBm IIP3
■
4dB Gain control
■
DC power consumption: 4V, 150mA
■
24L-QFN4x4
■
ESD protected
■
MSL Level 1
Conversion Gain (dB)
Gain @ 0V
Gain @ -2V
37
38
39
40
41
RF frequency (GHz)
Main Characteristics
Tamb = +25°C, VDL= VDX= 4V
Symbol
F
RF
F
LO
F
IF
G
Parameter
RF frequency range
LO frequency range
IF frequency range
Conversion gain @ VGC=-2V
Conversion gain @ VGC=0V
Min
37
17.5
DC
8
11
10
14
Typ
Max
40
21
3.5
Unit
GHz
GHz
GHz
dB
dB
ESD Protections: Electrostatic discharge sensitive device observe handling precautions!
Ref. DSCHR3694-QDG1192 - 11 Jul 11
1/18
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
CHR3694-QDG
Electrical Characteristics
37-40GHz Down Converter
Tamb= +25°C, VDL= VDX= 4V, Typical VGX = -0.9V & VGM= -0.7V
Symbol
F
RF
F
LO
F
IF
G
PLO
IFR
NF
IIP3
LO RL
RF RL
Gc
Parameter
RF frequency range
LO frequency range
IF frequency range
Conversion gain @ VGC = -2V
Conversion gain @ VGC = 0V
LO Input power
Image Frequency Rejection (1)
Noise Figure @ VGC = -2V, for IF>0.1GHz
Noise Figure @ VGC = 0V, for IF>0.1GHz
Input IP3
Input LO Return Loss
Input RF Return Loss
Gain control range
13
Min
37
17.5
DC
8
11
10
14
1
15
5
4.5
-5
-10
-4
4
4
-2
100
110
140
150
0
180
190
-8
-3
6.5
6
Typ
Max
40
21
3.5
Unit
GHz
GHz
GHz
dB
dB
dBm
dBc
dB
dB
dBm
dB
dB
dB
V
V
mA
mA
VDL,VDX Drain bias voltage
VGC
Idl + Idx
Gain control voltage (2)
Bias current @ VGC = -2V (3)
Bias current @ VGC = 0V (3)
(1) With external I/Q 90° hybrid coupler
(2) Idl=50mA@VGC=-2V, Idl= 60mA@VGC=0V
(3) Typically, Idl=60mA@VGC=0V, Idx=90mA
These values are representative of onboard measurements as defined on the drawing at
page 16 for CHR3694-QDG and page 17 for CHR3794-QDG.
Ref. : DSCHR3694-QDG1192 - 11 Jul 11
2/18
Specifications subject to change without notice
Route Départementale 128, BP46 - 91401 ORSAY Cedex - FRANCE
Tel.: +33 (0) 1 69 33 03 08 - Fax: +33 (0) 1 69 33 03 09
37-40GHz Down Converter
Absolute Maximum Ratings
(1)
Tamb = +25°C
Symbol
VDL,VDX
Idl + Idx
VGM,VGX
VGC
P_RF
P_LO
Tch
Ta
Tstg
Parameter
Maximum drain bias voltage
Maximum drain bias current
Gate bias voltage
Control gain voltage
Maximum RF input power
Maximum LO input power
Maximum channel temperature
Operating temperature range
Storage temperature range
CHR3694-QDG
Values
4.5
200
-2.0 to +0
-3.0 to +4
10
10
175
-40 to +85
-55 to +125
Unit
V
mA
V
V
dBm
dBm
°C
°C
°C
(1) Operation of this device above anyone of these paramaters may cause permanent damage.
Ref.: DSCHR3694-QDG1192 - 11 Jul 11
3/18
Specifications subject to change without notice
Route Départementale 128, BP46 - 91401 ORSAY Cedex - FRANCE
Tel.: +33 (0) 1 69 33 03 08 - Fax: +33 (0) 1 69 33 03 09
CHR3694-QDG
Device thermal performances
37-40GHz Down Converter
All the figures given in this section are obtained assuming that the QFN device is cooled
down only by conduction through the package thermal pad (no convection mode
considered).
The temperature is monitored at the package back-side interface (Tcase) as shown below.
The system maximum temperature must be adjusted in order to guarantee that Tcase
remains below than the maximum value specified in the next table. So, the system PCB
must be designed to comply with this requirement.
A derating must be applied on the dissipated power if the Tcase temperature can not be
maintained below than the maximum temperature specified (see the curve Pdiss. Max) in
order to guarantee the nominal device life time (MTTF).
DEVICE THERMAL SPECIFICATION : CHR3694-QDG
Max. junction temperature (Tj max)
:
144
Max. continuous dissipated power @ Tcase=
85 °C :
0,6
(1)
=> Pdiss derating above Tcase =
85 °C :
10
(2)
Junction-Case thermal resistance (Rth J-C)
:
<97
(3)
Min. package back side operating temperature
:
-40
(3)
Max. package back side operating temperature
:
85
Min. storage temperature
:
-55
Max. storage temperature
:
125
(1) Derating at junction temperature constant = Tj max.
(2) Rth J-C is calculated for a worst case where the
hotter junction
of the MMIC is considered.
°C
W
mW/°C
°C/W
°C
°C
°C
°C
(3) Tcase=Package back side temperature measured under the die-attach-pad (see the drawing below).
0,7
0,6
0,5
0,4
0,3
0,2
Pdiss. Max. (W)
0,1
0
-50
-25
0
25
50
75
100
125
Tcase (°C)
Pdiss. Max. (W)
Tcase
Example of QFN 16L 3x3
back-side view, temperature
reference point (Tcase) location.
Ref. : DSCHR3694-QDG1192 - 11 Jul 11
4/18
Specifications subject to change without notice
Route Départementale 128, BP46 - 91401 ORSAY Cedex - FRANCE
Tel.: +33 (0) 1 69 33 03 08 - Fax: +33 (0) 1 69 33 03 09
37-40GHz Down Converter
Typical Measured Performances
CHR3694-QDG
Tamb = +25°C, VDX=VDL = 4V, Typical VGX = -0.9V & VGM= -0.7V, P_LO=1dBm
These values are representative of onboard measurements (on connector access planes)
as defined on the drawing 97445 page 16 for CHR3694-QDG and drawing 97342 page 17
for CHR3794-QDG. The board loss is estimated to 2 to 3dB in the frequency range.
Conversion Gain @ Freq_IF= 2GHz, F_RF= 2xF_LO - F_IF, VGC=0V
versus temperature
20
18
16
14
12
10
8
6
4
2
0
36
Conversion Gain (dB)
Gc max @ -40°C
Gc max @ +25°C
Gc max @ +75°C
37
38
39
40
41
RF frequency (GHz)
Conversion Gain @ Freq_IF= 2GHz, F_RF= 2xF_LO - F_IF, VGC=-2V
versus temperature
20
18
16
14
12
10
8
6
4
2
0
Conversion Gain (dB)
Gc min @ -40°C
Gc min @ +25°C
Gc min @ +75°C
36
37
RF frequency (GHz)
38
39
40
41
Ref.: DSCHR3694-QDG1192 - 11 Jul 11
5/18
Specifications subject to change without notice
Route Départementale 128, BP46 - 91401 ORSAY Cedex - FRANCE
Tel.: +33 (0) 1 69 33 03 08 - Fax: +33 (0) 1 69 33 03 09
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