Voltage Variable Attenuator
824 - 960 MHz
AT65
-
0009
SOT-25
V 1.00
Electrical Specifications: T
A
= 25C, Z
0
= 50
Parameter
Test Conditions
Units
Min.
Typ.
Max.
Insertion Loss
V
B
= 0V
dB
--
1.7
2.1
VSWR
Ratio
--
1.7
2.2
Attenuation Flatness vs.
Frequency
0 - 10 dB
0 - 20 dB
0 - 30 dB
dB
dB
dB
--
--
--
0.5
0.5
1.0
1.3
1.3
2.5
Switching Speed
50% control to 90%/10% RF
Sec
--
5.0
7.0
Input IP3
Two Tones 900 MHz, 905 MHz, +5 dBm
VB = 0V
dB
--
40
--
Input IP2
Two Tones 900 MHz, 905 MHz, +5 dBm
VB = 0V
dB
--
34
--
Attenuation
V
B
= 3.7V
dB
25
28
--
Features
n
25 dB Attenuation Range
n
High IP3
n
Excellent Linearity Performance
n
Surface Mount SOT-25 Package
n
Low Cost/High Performance
n
50 Ohm Nominal Impedance
Description
M/A-COM's AT65-0009 is an integrated assembly contain-
ing two PIN diodes and a passive glass quadrature hybrid.
This device is packaged in a 5 leaded SOT plastic surface
mount package. The diodes are biased to +3.5V for maxi-
mum attenuation using the suggested Bias Circuit. The
AT65-0009 is ideally suited for GSM communication appli-
cations requiring variable attenuation in the 824 to 960
MHz bandwidth.
Voltage Variable Attenuator, 824 - 960 MHz
AT65-0009
Specifications subject to change without notice.
n
North America: Tel. (800) 366-2266
n
Asia/Pacific: Tel.+81-44-844-8296, Fax +81-44-844-8298
n
Europe: Tel. +44 (1344) 869 595, Fax+44 (1344) 300 020
Visit www.macom.com for additional data sheets and product information.
V 1.00
2
Recommended PCB Configuration
Pin Configuration
Absolute Maximum Ratings
3
3. Operation of this device above any one of these
parameters may cause permanent damage.
Parameter
Absolute Maximum
Max Input Power
+27 dBm
Operating Voltage
+5 V
Operating Temperature
-40C to +85C
Storage Temperature
-65C to +125C
Pin #
Function
1
RFIN V
B
2
GND
3
RFOUT V
B
4
GND
5
GND
Functional Diagram and
Bias Circuitry
Part
Value
Purpose
C1
390 pF
DC Block
C2
390 pF
DC Block
C3
390 pF
By-pass
C4
390 pF
By-pass
L1
180 nH
RF Choke
L2
180 nH
RF Choke
R1
10 kOhm
Current Limiting
C5
5
1.5 pF
RF Tune
C6
5
1.5 pF
RF Tune
4. All external circuitry parts are readily available, low cost
surface mount components (.060 in. x .030 in or .080 in
x .050 in.).
5. See Application Note MA-C-05010008A for external tuning
capacitor values to suit specific Communication Bandwidths.
External Circuitry Parts
4
Ordering Information
Part Number
Package
AT65-0009
Bulk Packaging
AT65-0009TR
Tape and Reel (1K Reel)
AT65-0009-TB
Units Mounted on Test Board
1. Circuit Material = FR-4, TETRA II, 0.031 inches thick.
2. Line Width = 0.025 inches, Line Spacing = 0.0056
inches.
GND
RF IN
RF OUT
C1
C2
V
B
L2
L1
C3
C4
GND
GND
R1
PIN 1
PIN 3
C6
C5
Voltage Variable Attenuator, 824 - 960 MHz
AT65-0009
Specifications subject to change without notice.
n
North America: Tel. (800) 366-2266
n
Asia/Pacific: Tel.+81-44-844-8296, Fax +81-44-844-8298
n
Europe: Tel. +44 (1344) 869 595, Fax+44 (1344) 300 020
Visit www.macom.com for additional data sheets and product information.
V 1.00
Typical Performance Curves
Loss vs. Frequency @ +85C
No Tuning Cap
Loss vs. Frequency @ -40C
No Tuning Cap
Loss vs. Frequency @ +25C
No Tuning Cap
Attenuation vs. Voltage with 1.5 pF
Tuning Cap @ +85C
Attenuation vs. Voltage with 1.5 pF
Tuning Cap @ -40C
Attenuation vs. Voltage with 1.5 pF
Tuning Cap @ +25C
0.0
5.0
10.0
15.0
20.0
25.0
30.0
35.0
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
Volts
Attenuation
0.0
5.0
10.0
15.0
20.0
25.0
30.0
35.0
0.0
1.0
2.0
3.0
4.0
Volts
Attenuation
0.0
5.0
10.0
15.0
20.0
25.0
30.0
35.0
0.0
1.0
2.0
3.0
4.0
Volts
Attenuation
1.00
1.20
1.40
1.60
1.80
2.00
820
840
860
880
900
920
940
960
Frequency (MHz)
Loss (dB)
1.00
1.20
1.40
1.60
1.80
2.00
820
840
860
880
900
920
940
960
Frequency (MHz)
Loss (dB)
1.00
1.20
1.40
1.60
1.80
2.00
820
840
860
880
900
920
940
960
Frequency (MHz)
Loss (dB)
Voltage Variable Attenuator, 824 - 960 MHz
AT65-0009
Specifications subject to change without notice.
n
North America: Tel. (800) 366-2266
n
Asia/Pacific: Tel.+81-44-844-8296, Fax +81-44-844-8298
n
Europe: Tel. +44 (1344) 869 595, Fax+44 (1344) 300 020
Visit www.macom.com for additional data sheets and product information.
V 1.00
Typical Performance Curves
Attenuation vs. Freq. With 1.5 pF
Tuning Cap @ -40C
Input VSWR vs. Freq. With 1.5 pF
Tuning Cap @ -40C
-
5.00
10.00
15.00
20.00
25.00
30.00
35.00
820
840
860
880
900
920
940
960
Frequency
Attenuation
1.0
2.0
3.0
3.2
Attenuation vs. Freq. With 1.5 pF
Tuning Cap @ +85C
-
5.00
10.00
15.00
20.00
25.00
30.00
35.00
820
840
860
880
900
920
940
960
Frequency
Attenuation
1.0
2.0
3.0
3.7
Attenuation vs. Freq. With 1.5 pF
Tuning Cap @ +25C
-
5.00
10.00
15.00
20.00
25.00
30.00
35.00
820
840
860
880
900
920
940
960
Frequency (MHz)
Attenuation
1V
2V
3V
3.85V
1
1.5
2
2.5
820
855
890
925
960
Frequency
VSWR
0V
1V
2V
3V and 3.2V
Input VSWR vs. Freq. With 1.5 pF
Tuning Cap @ +85C
1
1.5
2
2.5
820
855
890
925
960
Frequency
VSWR
0V
1V
2V
3V
3.7V
Input VSWR vs. Freq. With 1.5 pF
Tuning Cap @ +25C
1
1.5
2
2.5
820
855
890
925
960
Frequency
VSWR
0V
1V
2V
3V
3.2V
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