MA-COM AT

Digital Attenuator, 1 Bit, 10 dB Step, DC - 2.0 GHz
AT-266
AT-266
Digital Attenuator, 1 Bit, 10 dB Step
DC - 2.0 GHz
SOT-25 Plastic Package
Features
•
•
•
Single 10 dB Step
Low Loss 0.3dB Typ. @ 900 MHz
Low Cost Plastic SOT25 Package
.114 ± .008
2,9 ± 0,2
.075 ± .008
1,90 ± 0,2
+ .008
.043 - .004
1,10 + 0,2
- 0,1
Description
M/A-COM’s AT-266 is a 1 bit, 10 dB step GaAs MMIC Digital
Attenuator in a low cost SOT-25 surface mount plastic package.
The AT-266 is ideally suited for use where high accuracy, very
low power consumption and low intermodulation products are
required. Typical applications include radio, wireless LANs,
GPS equipment and other gain/level control circuits.
The AT-266 is a GaAs MMIC using a mature 1 micron process.
The process features full chip passivation for increased performance and reliability.
1.
Function
Description
1
RF In/Out
2
GND
1
RF Ground
3
RF2
1
RF In/Out
4
V1
Control Voltage
5
V2
Control Voltage
1
RF1
.008 MIN
0,20 MIN
Pin 1
+ .004
.031 - .007
0,80 + 0,1
- 0,18
+ .004
.006 - .002
0,15 + 0,1
- 0,05
.002 ± .002
0,05 ± 0,05
+ .004
.016 - .002
0,40 + 0,1
- 0,05
Truth Table
Pin Configuration
PIN No.
.110 ± .008
2,80 ± 0,2
.063 ± .004
1,6 ± 0,1
Series Capacitors on PINs1, 3 and 5, Shunt Capacitor on PIN 2
are required for Postive Control. 39pF capacitors used for postive control performance curves.
Electrical Specifications TA = 25°C
Parameter
MODE (Control)
Postive
1
Postive / Negative1,2
3
Negative
V1
V2
Atten.
0 ± 0.2V
+3 to +8V
+3 to +8V
0 ± 0.2V
10 dB
IL
-VC ± 0.2 V
+ VC
+VC
-VC ± 0.2V
10 dB
IL
0 ± 0.2V
-3V to -8V
-3V to -8V
0 ± 0.2V
IL
10 dB
1
1. External DC blocking capactors are required as noted
2. | -VC | + VC ≤ 8 V.
3. If negative control is used, DC blocking capacitors are not
required on RF Ports.
1
Test Conditions
Units
Min.
Typ.
Max.
Insertion Loss
0 - 1 GHz
dB
0.3
0.45
Insertion Loss
1 - 2 GHz
dB
0.5
0.7
Attenuation
0 - 1 GHz
dB
10
±0.4
1 - 2 GHz
dB
10
±0.5
1.4:1
1.5:1
VSWR
0 - 2 GHz
IP3
2 Tone @ 0 dBm, 5 MHz spacing
dBm
42
50
P1dB
1 GHz
dBm
23
28
Trise, Tfall
10% to 90% RF, 90% to 10% RF
ns
5
20
Ton, Toff
50% Control to 90% RF, 50% Control to 10% RF
ns
10
25
Transients
In Band
mV
6
10
1. All measurements at 1.0 GHz, -3 Volts control unless otherwise specified.
M/A-COM Division of AMP Incorporated 3 North America: Tel. (800) 366-2266, Fax (800) 618-8883 3 Asia/Pacific: Tel.+85 2 2111 8088, Fax +85 2 2111 8087
3 Europe: Tel. +44 (1344) 869 595, Fax+44 (1344) 300 020
www.macom.com
AMP and Connecting at a Higher Level are trademarks.
Specifications subject to change without notice.
V2.00
Digital Attenuator, 1 Bit, 10 dB Step, DC - 2.0 GHz
AT-266
1
Ordering Information
Absolute Maximum Ratings
Part Number
Parameter
Package
AT-266
SOT-25 Plastic Package
AT-266TR
Forward Tape and Reel
AT-266RTR
Reverse Tape and Reel
Absolute Maximum
Max. Input Power
50 MHz
1
+27 dBm
500 - 2000 MHz
1
+34 dBm
Control Voltage
1. Refer to Application Note M513 for reel size information.
+5V, -8.5V
Operating Temperature
-40°C to +85°C
Storage Temperature
-65°C to +150°C
1. Operation of this device above any one of these parameters may
cause permanent damage.
Typical Performance Curves
Insertion Loss vs. Frequency Over
Temperature (Postive Control)
Insertion Loss vs. Frequency Over
Temperature (Negative Control)
1
1
0.9
0.8
0.7
0.6
0.5
+25°C
+85°C
0.4
0.8
INSERTION LOSS (dB)
INSERTION LOSS (dB)
0.9
-40°C
0.3
0.2
0.7
+85°C
0.6
0.4
0.3
-40°C
0.2
0.1
0.1
0
0
0.5
1
1.5
2
2.5
0
3
0
0.5
1
FREGUENCY (GHz)
11
10.8
10.6
INSERTION LOSS (dB)
INSERTION LOSS (dB)
11
-40°C
10.2
+25°C
10
9.8
9.6
9.4
2
2.5
3
Relative Attenuation vs. Frequency Over
Temperature (Negative Control)
10.8
10.4
1.5
FREGUENCY (GHz)
Relative Attenuation vs. Frequency Over
Temperature (Posative Control)
+85°C
10.6
10.4
-40°C
10.2
9.2
10
+25°C
9.8
9.6
+85°C
9.4
9.2
9
9
0
0.5
1
1.5
2
2.5
0
3
0.5
1
Return Loss vs. Frequency
(Reference State)
35
35
30
RETURNLOSS (dB)
30
Negative Control
20
15
Positive Control
10
2
2.5
3
Return Loss vs. Frequency
(10 dB State)
40
25
1.5
FREGUENCY (GHz)
FREGUENCY (GHz)
RETURNLOSS (dB)
+25°C
0.5
25
20
Negative Control
15
10
Positive Control
5
5
0
0
0
0.5
1
1.5
2
2.5
FREQUENCY (GHz)
3
0
0.5
1
1.5
2
2.5
3
FREQUENCY (GHz)
V2.00
M/A-COM Division of AMP Incorporated 3 North America: Tel. (800) 366-2266, Fax (800) 618-8883 3 Asia/Pacific: Tel.+85 2 2111 8088, Fax +85 2 2111 8087
3 Europe: Tel. +44 (1344) 869 595, Fax+44 (1344) 300 020
www.macom.com
AMP and Connecting at a Higher Level are trademarks.
Specifications subject to change without notice.