鈥?/div>
Single 10 dB Step
Low Loss 0.3dB Typ. @ 900 MHz
Low Cost Plastic SOT25 Package
SOT-25 Plastic Package
.114
鹵
.008
2,9
鹵
0,2
.075
鹵
.008
1,90
鹵
0,2
+ .008
.043 - .004
1,10 + 0,2
- 0,1
.110
鹵
.008
2,80
鹵
0,2
Description
M/A-COM鈥檚 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 perfor-
mance and reliability.
.063
鹵
.004
1,6
鹵
0,1
.008 MIN
0,20 MIN
Pin 1
+ .004
.006 - .002
0,15 + 0,1
- 0,05
+ .004
.031 - .007
0,80 + 0,1
- 0,18
.002
鹵
.002
0,05
鹵
0,05
+ .004
.016 - .002
0,40 + 0,1
- 0,05
Pin Configuration
PIN No.
1
2
3
4
5
1.
Truth Table
Description
RF In/Out
RF Ground
RF In/Out
Control Voltage
Control Voltage
Negative
3
Function
RF1
RF2
V1
V2
1
1
MODE
(Control)
Postive
1
Postive / Negative
1,2
V1
0 鹵 0.2V
+3 to +8V
-V
C
鹵 0.2 V
+ V
C
0 鹵 0.2V
-3V to -8V
V2
+3 to +8V
0 鹵 0.2V
+V
C
-V
C
鹵 0.2V
-3V to -8V
0 鹵 0.2V
Atten.
10 dB
IL
10 dB
IL
IL
10 dB
1
GND
1
Series Capacitors on PINs1, 3 and 5, Shunt Capacitor on PIN 2
are required for Postive Control. 39pF capacitors used for pos-
tive control performance curves.
1
1. External DC blocking capactors are required as noted
2. | -V
C
| + V
C
鈮?/div>
8 V.
3. If negative control is used, DC blocking capacitors are not
required on RF Ports.
Electrical Specifications T
A
= 25擄C
Parameter
Insertion Loss
Insertion Loss
Attenuation
VSWR
IP
3
P
1dB
Trise, Tfall
Ton, Toff
Transients
0 - 1 GHz
1 - 2 GHz
0 - 1 GHz
1 - 2 GHz
0 - 2 GHz
Test Conditions
Units
dB
dB
dB
dB
dBm
dBm
ns
ns
mV
Min.
Typ.
0.3
0.5
10
10
1.4:1
Max.
0.45
0.7
鹵0.4
鹵0.5
1.5:1
2 Tone @ 0 dBm, 5 MHz spacing
1 GHz
10% to 90% RF, 90% to 10% RF
50% Control to 90% RF, 50% Control to 10% RF
In Band
42
23
50
28
5
10
6
20
25
10
V2.00
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.
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