Skyworks ATN3590-07 Fixed attenuator Datasheet

DATA SHEET
ATN3590 Series: Fixed Attenuators
Applications
x Level adjustment in radios, radars, EW/ECM equipment, and
test instruments
Features
x Fixed value, absorptive devices
x Available attenuation values range from 0 to 10 dB (in 1 dB
steps), and 12, 15, 20, and 30 dB
x Suitable for use to 40 GHz or higher
x Excellent return loss: 30 dB, typical
x Enhanced power handling: 2 W
Out
Back Side
Back Side
Skyworks offers lead (Pb)-free, RoHS (Restriction of
Hazardous Substances) compliant packaging.
In
Schematic
Figure 1. Typical Attenuator Die and Circuit
Description
The ATN3590 family of fixed resistive attenuators are integrated
circuits comprising thin film resistors and through-die vias that
provide excellent attenuation flatness from low frequency to
40 GHz or higher. These attenuators are available from 0 to 30 dB
(see Table 2).
The ATN3590 attenuator family is optimized for surface mounting
on co-planar waveguide or microstrip printed circuit boards. Bond
wires or ribbons are used to connect the input and output ports of
the attenuators to the external circuit transmission lines.
Connection to ground is accomplished by through-die vias to the
die backside metallization.
The dice are attached using eutectic solder or conductive epoxy
and can operate over a temperature range of –65 qC to 150 qC.
The absolute maximum ratings for the ATN3590 attenuators are
provided in Table 1 and the electrical specifications are shown in
Table 2. Typical performance characteristics are illustrated in
Figures 2 through 8.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
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DATA SHEET • ATN3590 SERIES FIXED ATTENUATORS
Table 1. ATN3590 Series Absolute Maximum Ratings
Parameter
Symbol
Minimum
Typical
Maximum
Units
2
W
Input power
PIN
Power dissipation @ 25 °C
PDIS
2
W
Operating temperature
TOP
–55
+150
qC
Storage temperature
TSTG
–55
+150
qC
Note:
Exposure to maximum rating conditions for extended periods may reduce device reliability. There is no damage to device with only one parameter set at the limit and all other
parameters set at or below their nominal value. Exceeding any of the limits listed here may result in permanent damage to the device.
CAUTION: Although this device is designed to be as robust as possible, Electrostatic Discharge (ESD) can damage this device. This device
must be protected at all times from ESD. Static charges may easily produce potentials of several kilovolts on the human body
or equipment, which can discharge without detection. Industry-standard ESD precautions should be used at all times.
Table 2. ATN3590Series Electrical Specifications (Note 1)
(TOP = +25 qC, Characteristic Impedance [ZO] = 50 Ω, Unless Otherwise Noted)
Part Number
Attenuation Attenuation Attenuation Attenuation
Min. Return Min. Return Min. Return Min. Return
Attenuation
Flatness
Flatness
Flatness
Flatness
Loss
Loss
Loss
Loss
Attenuation Tolerance
(Note 2)
(Note 2)
(Note 2)
(Note 2)
DC–12 GHz 12–26 GHz 26–33 GHz 33–40 GHz
@ DC
(dB)
DC–12 GHz 12–26 GHz 26–33 GHz 33–40 GHz
(dB)
(dB)
(dB)
(dB)
(dB)
(dB)
(dB)
(dB)
(dB)
ATN3590-00
0
0.25
±0.15
±0.15
±0.20
±0.20
28
24
20
16
ATN3590-01
1
±0.20
±0.15
±0.15
±0.20
±0.20
28
24
20
16
ATN3590-02
2
±0.20
±0.15
±0.15
±0.20
±0.20
28
24
20
16
ATN3590-03
3
±0.20
±0.15
±0.15
±0.20
±0.20
28
24
20
16
ATN3590-04
4
±0.20
±0.15
±0.15
±0.20
±0.20
28
24
20
16
ATN3590-05
5
±0.20
±0.15
±0.15
±0.20
±0.20
28
24
20
16
ATN3590-06
6
±0.40
±0.15
±0.15
±0.20
±0.20
28
24
20
16
ATN3590-07
7
±0.40
±0.15
±0.15
±0.20
±0.20
28
24
20
16
ATN3590-08
8
±0.40
±0.15
±0.15
±0.20
±0.20
28
24
20
16
ATN3590-09
9
±0.40
±0.20
±0.20
±0.25
±0.30
28
24
20
16
ATN3590-10
10
±0.40
±0.20
±0.20
±0.25
±0.50
28
24
20
16
ATN3590-12
12
±0.40
±0.20
±0.20
±0.30
±0.50
28
24
20
16
ATN3590-15
15
±0.40
±0.20
±0.20
±0.50
±0.75
28
24
20
16
ATN3590-20
20
±1.0
±0.20
±0.20
±0.75
±1.00
28
24
20
16
ATN3590-30
30
±1.0
±0.20
±0.25
±0.75
±2.50
28
24
20
16
Note 1: Performance is guaranteed only under the conditions listed in this Table.
Note 2: Flatness is defined as the maximum deviation from the mean value of attenuation over the specified frequency range.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
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December 2, 2009 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 200842B
DATA SHEET • ATN3590 SERIES FIXED ATTENUATORS
Typical Performance Characteristics
(TOP = +25 qC, Characteristic Impedance [ZO] = 50 Ω, Unless Otherwise Noted. Data Gathered Using Ground-to-Signal-to-Ground Probes
on Die)
+2.0
–2.0
0 dB
1 dB
2 dB
+1.5
+1.0
–3.0
+0.5
0
Attenuation (dB)
Attenuation (dB)
3 dB
4 dB
5 dB
–2.5
–0.5
–1.0
–1.5
–2.0
–2.5
–3.5
–4.0
–4.5
–5.0
–3.0
–5.5
–3.5
–4.0
0
5
10
15
20
25
30
35
–6.0
40
0
5
10
15
Frequency (GHz)
20
25
30
35
40
35
40
Frequency (GHz)
Figure 2. Attenuation vs Frequency
(0 dB, 1 dB, and 2 dB Attenuators)
Figure 3. Attenuation vs Frequency
(3 dB, 4 dB, and 5 dB Attenuators)
–5.0
–8
6 dB
7 dB
8 dB
–5.5
–9
Attenuation (dB)
Attenuation (dB)
–6.0
–6.5
–7.0
–7.5
–10
–11
–12
–8.0
–9.0
9 dB
10 dB
12 dB
–13
–8.5
0
5
10
15
20
25
30
35
40
Frequency (GHz)
–14
0
5
10
15
20
25
30
Frequency (GHz)
Figure 4. Attenuation vs Frequency
(6 dB, 7 dB, and 8 dB Attenuators)
Figure 5. Attenuation vs Frequency
(9 dB, 10 dB, and 12 dB Attenuators)
–14
–16
Attenuation (dB)
–18
–20
–22
15 dB
20 dB
30 dB
–24
–26
–28
–30
–32
0
5
10
15
20
25
30
35
40
Frequency (GHz)
Figure 6. Attenuation vs Frequency
(15 dB, 20 dB, and 30 dB Attenuators)
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
200842B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • December 2, 2009
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DATA SHEET • ATN3590 SERIES FIXED ATTENUATORS
0
0
0 dB
6 dB
15 dB
–10
1 dB
7 dB
20 dB
2 dB
8 dB
30 dB
3 dB
9 dB
4 dB
10 dB
5 dB
12 dB
Small Signal Gain (dB)
Input Return Loss (dB)
1 dB
7 dB
20 dB
2 dB
8 dB
30 dB
3 dB
9 dB
4 dB
10 dB
5 dB
12 dB
–20
–20
–30
–40
–50
–30
–40
–50
–60
–60
–70
–70
–80
0 dB
6 dB
15 dB
–10
0
5
10
15
20
25
30
35
40
–80
0
5
10
15
Frequency (GHz)
Figure 7. Input Return Loss vs Frequency
20
25
30
35
40
Frequency (GHz)
Figure 8. Small Signal Gain vs Frequency
Technical Description
The ATN3590 family of fixed attenuators comprises devices with
nominal attenuation values of 0 to 10 dB (in 1 dB steps), and 12,
15, 20, and 30 dB. These attenuators contain through-wafer vias
that connect the topside ground to the backside metallization of
each die.
The devices with nominal attenuation values of 1 dB or greater
are fabricated using thin film resistors deposited on high
resistivity silicon substrates. The circuit topology is a simple tee
structure that consists of two series resistors and a shunt
resistance, which in this case is realized as a pair of shunt
resistors connected to the node between the two series resistors
(refer to Figures 9 and 10). The resistances of each of these
resistors are selected to simultaneously produce the nominal
attenuation with very good input and output return losses.
R3
R1
R4
R2
Figure 9. Circuit Topology (1 – 5 dB Attenuators)
R1
The attenuators with nominal attenuation values ≥6 dB contain a
pair of cascaded tee sections (see Figure 11). The 0 dB
attenuator, ATN3590-00, is a 50 Ω microstrip transmission line
with identical foot print and bond pads to those of the other
products in this family.
R4
R2 || R3
Figure 10. Simplified Circuit Topology (1 – 5 dB Attenuators)
Die Attachment and Signal Path Connection
Any of the ATN3590 family of attenuators should be mounted on
the ground plane of a transmission medium. The die should be
attached with conductive epoxy or a eutectic solder such as
gold/tin (AuSn).
For good high frequency performance, it is essential that there is
no ground plane directly beneath the series signal path of the
ATN3590. The backside metallization on the die is split into two
regions along the sides of the die to accommodate this
requirement.
R3
R5
R1
R4
R2
R7
R6
Figure 11. Circuit Topology for Attenuators with Nominal
Attenuation ≥6 dB
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
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December 2, 2009 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 200842B
DATA SHEET • ATN3590 SERIES FIXED ATTENUATORS
The metallization on the circuit medium to which the attenuator is
to be mounted must also include the split in the ground
connections. It is recommended that the gap between the ground
pads on the circuit medium should be 250 μm wide by 900 μm
long.
Package Dimensions
The input and output signal paths should be connected to the
signal path bond pads on the attenuator with Au ribbons or wires.
It is recommended that these connections be made with
0.25 x 3 mil (6.25 x 75 microns) ribbons, as shown in Figure 12.
Packaging
The PCB layout footprint for the ATN3590 attenuators is shown in
Figure 13. Package dimensions are provided in Figure 14.
The standard mode of packaging for shipment of the ATN3590
Attenuator Series is 100 pieces per GelPak™.
0.25 x 3 mil Au Ribbon
(2 Places)
Ground
Input/Output
Output/Input
Ground
Figure 12. Suggested Die Mount and Ribbon Attachment
For best performance, no PCB topside
ground metal should remain in this area
(250 x 900 microns, centered on die)
Ground metal (2 places)
Figure 13. PCB Layout Footprint
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
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DATA SHEET • ATN3590 SERIES FIXED ATTENUATORS
0.725
Additional Ground Contacts
0.110 x 0.075 (4 Places)
10DB
Attenuator Value
Ground Via to Backside
(8 Places)
Input/Output Pad
0.110 x 0.075
(2 Places)
0.700
0.100
Low Inductance Ground Contact
(Cu-Ti/V-Au). Solder or Conductive
Epoxy Attach.
0.152
Out
Back Side
Back Side
In
Schematic
Notes:
1. Resistor Configuration on Top Side
of Die Varies by Attenuation Value of Device.
2. All measurements in millimeters
3. All dimensions ± 0.025 mm
S1603
Figure 14. ATN3590 Attenuator Series Die Dimensions
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