CHA3513
RoHS COMPLIANT
6-18GHz 3 bit Digital Variable Amplifier
GaAs Monolithic Microwave IC
Description
The CHA3513 is composed by a three steps
digital attenuator followed by a three stage
travelling amplifier and a Single Pole Single
Through (SPST) switch. It is designed for
defense applications. The backside of the
chip is both RF and DC grounded. This helps
to simplify the assembly process.
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 available in chip form.
0dB state
10A
5A
10A1
B C F
G
RF
RF
IN
10dB
5dB
10dB
OUT
10B
5B
10B1
A D E
H
Typical on wafer Measurements
Gain versus attenuation states
Main Features
5dB state
■
Performances: 6-18GHz
■
20dBm saturated output power
■
19 dB gain
■
3 bit attenuator for 26dB range
■
DC power consumption, 300mA @ 4.5V
■
Chip size:
6.68 x 2.46 x 0.1 mm
10dB state
Main Characteristics
Tamb. = 25°
C
Symbol
Fop
G
Psat
ATT dyn
Parameter
Operating frequency range
Small signal gain @ Attenuator state 0dB
Saturated Output power @ Attenuator state 0dB
Attenuator range with 3bit
Min
6
Typ
19
20
25
Max
18
Unit
GHz
dB
dBm
dB
ESD Protection : Electrostatic discharge sensitive device. Observe handling precautions !
Ref. : DSCHA3513-8144 - 23 May 08
1/10
Specifications subject to change without notice
United Monolithic Semiconductors S.A.S.
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
CHA3513
6-18GHz Digital Variable Amplifier
Electrical Characteristics on wafer
Tamb = +25°
C
Vd = Pads B, D, F = 4.5V, Vg = Pads A, C, E tuned for Id = 300mA
Symbol
Fop
G
Parameter
Operating frequency range (1)
Small signal gain @ Attenuator state 0dB (1)
6-17GHz
17-18GHz
Min
6
Typ
Max
18
Unit
GHz
17
15
4.5
9.5
9.5
19
16
5
10
10
25
-35
6.5
12
12
dB
dB
dB
dB
dB
dB
dB
ATT bit
Attenuator bit: State 5dB
State 10 dB 1
State 10dB 2
ATT dyn
Is
Attenuator range with 3bit
Small signal gain @ Attenuator state 0dB &
switch OFF (1)
Output power at 1dB compression @ Attenuator
state 0dB (1)
Saturated Output power @ Attenuator state 0dB
(1)
Noise figure @ Attenuator state 0dB
Input Return Loss all attenuator states
Output Return Loss all attenuator states & switch
ON
Drain bias DC voltage (
Pads B, D, F)
Bias current @ small signal
Control voltage for Attenuator bits & SPST switch
-5
P1dB
18
dBm
Psat
20
dBm
NF
RL_IN
RL_OUT
12
-15
-15
-9
-9
dB
dB
dB
Vd
Id
Vc
4.5
300
350
0
V
mA
V
(1) These values are representative of on-wafer measurements that are made without bonding
wires at the RF ports.
Ref. : DSCHA3513-8144 - 23 May 08
2/10
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
6-18GHz Digital Variable Amplifier
CHA3513
Absolute Maximum Ratings
Tamb. = 25° (1)
C
Symbol
Vd
Id
Vg
Vc
Pin
Tch
Ta
Tstg
Parameter
Maximum Drain bias voltage ( Pads B,D,F)
Drain bias current with Vd=4.5V
Gate bias voltage (Pads A,C,E)
Attenuator bits & SPST control voltage
Maximum input power overdrive (2)
Maximum channel temperature
Operating temperature range
Storage temperature range
Values
+5
450
-2 to +0.4
-7 to +0.6
+20.0
+175
-40 to +70
-55 to +125
Unit
V
mA
V
V
dBm
°
C
°
C
°
C
(1) Operation of this device above anyone of these parameters may cause permanent damage.
(2) Duration < 1s.
3bit VGA Control interface
The attenuator states are controlled by 6 voltages. The SPST switch is controlled by 2
voltages.
state
0
1
2
3
4
6
7
8
Theoretical
attenuation
dB
0 référence
5
10 config.1
15 config.1
15 config.2
10 config.2
25
Isolation
Voltage CONTROL PAD
10A
(V)
10B
(V)
5A
(V)
5B
(V)
10A1
(V)
10B1
(V)
Switch control
G
H
-5
-5
0
0
-5
-5
0
-5
0
0
-5
-5
0
0
-5
0
-5
0
-5
0
0
-5
0
-5
0
-5
0
-5
-5
0
-5
0
-5
-5
-5
-5
0
0
0
-5
0
0
0
0
-5
-5
-5
0
-5
-5
-5
-5
-5
-5
-5
0
0
0
0
0
0
0
0
-5
Ref. : DSCHA3513-8144 - 23 May 08
3/10
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
CHA3513
6-18GHz Digital Variable Amplifier
Typical on wafer Measurements @ 25°
C
Bias conditions: Vd = 4.5V, Vg tuned for Id = 300mA
0dB state
5dB state
10dB states
Linear Gain versus attenuator states
Linear Gain with SPST switch OFF
Ref. : DSCHA3513-8144 - 23 May 08
4/10
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
6-18GHz Digital Variable Amplifier
CHA3513
Saturated output power @ nominal state
dB(S11) versus frequency for all state
Attenuator value versus frequency for all states
Switch OFF
dB(S22) versus frequency for all states
Attenuator phase variation versus frequency for all
states
5/10
Specifications subject to change without notice
Ref. : DSCHA3513-8144 - 23 May 08
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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