AMMP-6640
DC-40 GHz Variable Attenuator
Data Sheet
Description
The AMMP-6640 MMIC is a monolithic, voltage variable,
GaAs IC attenuator that operates from DC-40 GHz. It is
fabricated using Avago Technologies enhancement mode
MMIC process with backside ground vias, and gate lengths
of approximately 0.25um. The attenuator has a distributed
topology that helps to absorb parasitic effects of its series
and shunt FETs to make it broadband.
Features
•
•
•
•
Surface Mount Package, 5.0 x 5.0 x 2 mm
Wide Frequency Range : DC-40 GHz
I.L.
: 5dB @ 40GHz
Attenuation Range
: >20dB
Package Diagram
NC
1
NC
2
NC
3
•
IIP3
: >25dBm
•
P1dB
: >26dBm
•
Dual Positive Bias Supply
Applications
•
•
•
•
Microwave Radio Systems
Satellite VSAT, DBS Up / Down Link
LMDS & Pt – Pt mmW Long Haul
Broadband Wireless Access (including 802.16 and
802.20 WiMax)
•
WLL and MMDS loops
RFin
8
4
RFout
7
V
SE
6
NC
5
V
SH
Functional Block Diagram
NC
1
NC
2
NC
3
Pin
1
2
3
4
5
6
7
8
Function
NC
NC
NC
RF
OUT
V
SH
NC
V
SE
RF
IN
RF
IN
8
4 RF
OUT
7
V
SE
6
NC
5
V
SH
Top View
Package Base: GND
Attention: Observe Precautions for
handling electrostatic sensitive devices.
ESD Machine Model (Class A): 70V
ESD Human Body Model (Class 1A): 350V
Refer to Avago Application Note A004R:
Electrostatic Discharge Damage and Control.
Note: MSL Rating = Level 2A
Electrical Specifications
1. Small/Large -signal data measured in a fully de-embedded test fixture form TA = 25°C.
2. Data obtained from on-wafer measurement
3. This final package part performance is verified by a functional test correlated to actual performance at one or more
frequencies.
4. Specifications are derived from measurements in a 50 Ω test environment. Aspects of the amplifier performance may
be improved over a more narrow bandwidth by application of additional conjugate, linearity, or low noise (Гopt)
matching.
Table 1. RF Electrical Characteristics
[1,2]
Small signal data measured in packaged form on a 2.4mm connector based evaluation board at T
A
= 25°C, Zo = 50Ω
Symbol
Minimum Attenuation
(Reference State)
Parameters and Test Conditions
Small-signal S21
V
se
= 1.2 V, Vsh = 0
Units
dB
Freq. [GHz]
6
28
26
30
40
Minimum
Typical
2.5
3.8
4
4.4
5
Maximum
3.1
4.5
4.6
5
6
Maximum Attenuation
Small-signal S21
V
se
= 0 V, Vsh = 1.2V
dB
6
18
26
38
40
23
23
23
23
25
25
26
26
26
28
10
9
30
27
27
RL
in
and RL
out
RL
in
and RL
out
IIP3
P1dB (input)
P1dB (input)
At Minimum Attenuation
V
se
= 1.2V, Vsh = 0V
At Maximum Attenuation
V
se
= 0V, Vsh = 1.2V
at Minimum Attenuation
at Minimum Attenuation
at Maximum Attenuation
dB
dB
dBm
dBm
dBm
<40
<40
<38
<40
<40
Table 2. Recommended Operating Range
1. Ambient operational temperature TA = 25°C unless otherwise noted.
2. Data obtained from on-wafer measurement
Parameter
Vse Control Current (Min Attenuation), Ic_Vse
Vse Control Current (Max Attenuation), Ic_Vse
Vsh Control Current (Min Attenuation), Ic_Vsh
Vsh Control Current (Max Attenuation), Ic _Vsh
Min.
Typical
Max.
10.0
1.5
10.0
1.5
Unit
uA
mA
uA
mA
Test Condition
Vse=1.2V, Vsh=0
Vse=0V, Vsh=1.2V
Vse=0V, Vsh=1.2V
Vse=1.2V, Vsh=0
Table 3. Absolute Minimum and Maximum Ratings
[1]
Parameter
Voltage to Control VSWR, Vc
RF Input Power, Pin
Operating Channel Temperature, Tch
Storage Temperature, Tstg
Maximum Assembly Temperature, Tmax
-40
Min.
0
Max.
2.5
30
+150
+150
260
Unit
V
dBm
dB
°C
°C
Comments
60 second maximum
Notes:
1. Operation in excess of any one of these conditions may result in permanent damage to this device. The absolute maximum ratings for VC and Pin
were determined at an ambient temperature of 25°C unless noted otherwise..
2
AMMP-6640 Typical Performance (T
A
= 25°C, Z
in
= Z
out
= 50
Ω)
(Data was obtained from a 2.4mm connector based test fixture and includes connector and board mismatch and losses.
Losses may gradually increase from ~0.1dB at 45MHz to ~1.5dB at 40GHz at input and output ports.)
0
Forward Transmission, dB
-5
-10
-15
-20
-25
-30
0
5
10
15
20
25
freq, GHz
30
35
40
45
Attenuation
(dB)
0
2
4
6
8
10
12
14
16
18
20
22
max
Vseries
(V)
1.2
0.440
0.435
0.430
0.420
0.410
0.400
0.385
0.375
0.360
0.350
0.346
0
Vshunt
(V)
0
0.325
0.383
0.416
0.440
0.465
0.480
0.505
0.535
0.575
0.650
0.845
1.2
Figure 9. Attenuation vs Frequency
0
-5
Forward Transmission, dB
-10
-15
-20
-25
-30
-35
-40
0
5
0
Forward Transmission, dB
MIN
MAX
-5
-10
-15
-20
-25
-30
-35
10
15
20
25
freq, GHz
30
35
40
45
-40
0
5
10
15
20
25
freq, GHz
30
35
40
45
MIN
MAX
Figure 10a. S11 vs Frequency
Figure 10b. S22 vs Frequency
0
-5
Forward Transmission, dB
-10
-15
-20
-25
-30
-35
0
5
10
15
20
25
freq, GHz
30
35
40
45
dBm
MIN
MAX
45
40
35
30
25
20
15
10 6
0dB
10dB
10
14
18
22
26
Frequency (GHz)
30
34
38
Figure 11. Insertion Loss vs Frequency
Figure 12. IIP3 vs Attenuation Input Power = 0dBm
3
0
-5
Attenuation (dB)
Attenuation (dB)
-10
-15
-20
-25
-30
-5
0
5
10
Input Power (dBm)
15
20
MAX
MIN
0
-5
-10
-15
-20
-25
-30
-5
0
5
10
Input Power (dBm)
15
20
MAX
MIN
Figure 13a. Attenuation vs Input Power (Frequency = 6 GHz)
Figure 13b. Attenuation vs Input Power (Frequency = 18 GHz)
0
-5
Attenuation (dB)
Attenuation (dB)
-10
-15
-20
-25
-30
-35
-5
0
5
10
Input Power (dBm)
15
20
MAX
MIN
0
-5
-10
-15
-20
-25
-30
-35
-5
0
5
10
Input Power (dBm)
15
20
MAX
MIN
Figure 13c. Attenuation vs Input Power (Frequency = 26 GHz)
Figure 13d. Attenuation vs Input Power (Frequency = 40 GHz)
0
-2
Insertion Loss (dB)
-4
-6
-8
-10 0
5
10
15
20
25
Freq. (GHz)
30
S21 25°C
S21 -40°C
S21 85°C
35
40
Insertion Loss (dB)
-22
-23
-24
-25
-26
-27
-28
-29
-30
-31
-32 0
S21 25°C
S21 -40°C
S21 85°C
5
10
15
20
25
Freq. (GHz)
30
35
40
Figure 14. Minimum Attenuation vs Frequency (Over Temp)
Figure 15. Maximum Attenuation vs Frequency (Over Temp)
4
31
30
Pin (dBm)
Pin(dBm)
31
30
Pin(dBm)
29
28
27
Pin(dBm)
29
28
27
26
6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40
Frequency (GHz)
26
6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40
Frequency (GHz)
Figure 16a. Minimum Attenuation vs P1dB
Figure 16b. Mid (10dB) Attenuation vs P1dB
31
30
Pout (dBm)
29
28
27
26
Pin(dBm)
6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40
Frequency (GHz)
Figure 16c. Maximum Attenuation vs P1dB
5
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