CHA2293
RoHS COMPLIANT
24-30GHz Low Noise, Variable Gain Amplifier
GaAs Monolithic Microwave IC
Description
The CHA2293 is a high gain four-stage
monolithic low noise amplifier with variable gain.
It is designed for a wide range of applications,
from military to commercial communication
systems.The backside of the chip is both RF and
DC grounded. This helps simplify the assembly
process.
The circuit is manufactured with a PM-HEMT
process, 0.25µm gate length, via holes through
the substrate, air bridges and electron beam
gate lithography.
It is available in chip form.
28
26
24
22
20
18
16
14
12
10
8
6
4
2
0
24
Typical on wafer measurements :Gain & NF
Main Features
Frequency range : 24-30GHz
3dB Noise Figure.
24dB gain
Gain control range: 15dB
Low DC power consumption, 160mA @ 5V
Chip size : 2.32 X 1.23 X 0.10 mm
Gain (dB)
NF (dB)
25
26
27
28
29
30
Frequency (GHz)
Main Characteristics
Tamb. = 25°
C
Parameter
Min
Typ
Max
Unit
Fop
G
NF
Gctrl
Id
Operating frequency range
Small signal gain
Noise figure
Gain control range with Vc variation
Bias current
24
24
3
15
160
30
GHz
dB
3.5
dB
dB
mA
ESD Protection : Electrostatic discharge sensitive device. Observe handling precautions !
Ref. DSCHA22937150 - 30 May 07
1/7
Specifications subject to change without notice
Route Départementale 128 , B.P.46 - 91401 ORSAY Cedex - FRANCE
Tel.: +33 (0)1 69 33 03 08 - Fax : +33 (0)1 69 33 03 09
24-30GHz LNA VGA
Electrical Characteristics for Broadband Operation
Tamb = +25° V5=Vd= 5V
C,
Symbol
Fop
G
∆G
Is
NF
Gctrl
P1dB
VSWRin
CHA2293
Parameter
Operating frequency range
Small signal gain (1)
Small signal gain flatness (1)
Reverse isolation (1)
Noise figure with Vc=1.2V
Gain control range versus Vc
Output power at 1dB compression with Vc=1.2V
Input VSWR (1)
Min
24
22
Typ
Max
30
Unit
GHz
dB
dB
dB
24
±1.5
50
3
3.5
dB
dB
dBm
12
15
12
4.0:1
2.0:1
VSWRout Output VSWR (1)
Vd
DC voltage
V5= Vd
Vc
5
[-0.7,+1.2]
35
160
-1.5
+1.3
V
V
mA
mA
Id1
Id
Bias current (2) with Vc=1.2V
Bias current total (3) with Vc=1.2V
(1) These values are representative of on-wafer measurements that are made without bonding
wires at RF ports.
(2) For optimum noise figure, the bias current Id1 should be adjust to 35mA with Vg1.
(3) With Id1=35mA, adjust Vg voltage for a total drain current around 160mA.
Absolute Maximum Ratings
Tamb. = 25° (1)
C
Symbol
Vd
Vc
Id
Vg
Pin
Ta
Tstg
Drain bias voltage
Control bias voltage
Drain bias current
Gate bias voltage
Maximum peak input power overdrive (2)
Operating temperature range
Storage temperature range
Parameter
Values
5.5
1.5
250
-2.0 to +0.4
+15
-40 to +85
-55 to +155
Unit
V
V
mA
V
dBm
°
C
°
C
(1) Operation of this device above anyone of these parameters may cause permanent damage.
(2) Duration < 1s.
Ref. : DSCHA22937150 - 30 May 07
2/7
Specifications subject to change without notice
Route Départementale 128 , B.P.46 - 91401 ORSAY Cedex - FRANCE
Tel.: +33 (0)1 69 33 03 08 - Fax : +33 (0)1 69 33 03 09
24-30GHz LNA VGA
Typical on wafer Measurements
Bias Conditions :
CHA2293
V5=Vd=5V, Vg1 pour Id1=35mA, Vg=-0.3V, Vc=+1.2V
Typical on-wafer Gain and Return Loss
Bias Conditions :
V5=Vd=5V, Vg1 pour Id1=35mA, Vg=-0.3V
Control gain range versus Frequency
Ref. : DSCHA22937150 - 30 May 07
3/7
Specifications subject to change without notice
Route Départementale 128 , B.P.46 - 91401 ORSAY Cedex - FRANCE
Tel.: +33 (0)1 69 33 03 08 - Fax : +33 (0)1 69 33 03 09
24-30GHz LNA VGA
Bias Conditions :
V5=Vd=5V, Vg1=Vg=-0.3V
CHA2293
Gain versus control voltage
Gain and Noise Figure versus Frequency (Vc=+1.2V)
Ref. : DSCHA22937150 - 30 May 07
4/7
Specifications subject to change without notice
Route Départementale 128 , B.P.46 - 91401 ORSAY Cedex - FRANCE
Tel.: +33 (0)1 69 33 03 08 - Fax : +33 (0)1 69 33 03 09
24-30GHz LNA VGA
In jig Measurements
CHA2293
Bias Conditions :
V5=Vd=5V, Vg1=Vg=-0.3V, Vc=+1.2V
All these measurements include the losses from the jig ( about 0.5dB on gain, 0.2dB on
noise figure and 0.3dB on output power)
Gain & Output power @ 24-30GHz
Gain & Noise figure versus Vc
Ref. : DSCHA22937150 - 30 May 07
5/7
Specifications subject to change without notice
Route Départementale 128 , B.P.46 - 91401 ORSAY Cedex - FRANCE
Tel.: +33 (0)1 69 33 03 08 - Fax : +33 (0)1 69 33 03 09
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