Voltage Variable Absorptive Attenuator 12 dB, DC-2.0 GHz
Features
• • • • • • • • Attenuation: 12 dB at 1 GHz Low Intermodulation Products Low DC Power Consumption: 50 µW Single Voltage Control: 0 to -4 Volts Nanosecond Switching Speed Temperature Range: -40°C to +85°C SOT-143 Plastic Package Tape and Reel Packaging Available
AT-259 V4
Functional Schematic
4 3
Description
M/A-COM’s AT-259 is a GaAs MMIC voltage variable absorptive attenuator in a low cost SOT-143 4-Lead surface mount plastic package. The AT-259 is ideally suited for use where attenuation fine tuning, fast switching and very low power consumption are required. Typical applications include radio, cellular, GPS equipment and other automatic gain/level control circuits. The AT-259 is fabricated with a monolithic GaAs MMIC using a mature 1 micron process. The process features full chip passivation for increased performance and reliability.
1
2
Pin Configuration
Pin No.
1 2
Function
Ground VC
Pin No.
3 4
Function
RF2 RF1
Ordering Information
Part Number AT-259 AT-259TR Package SOT 4-Lead Plastic Package Forward Tape and Reel
Absolute Maximum Ratings 1
Parameter
Input Power Control Voltage Absolute Maximum +21 dBm +5V, -8.5V -40°C to +85°C -65°C to +150°C
Note: Reference Application Note M513 for reel size information.
Operating Temperature Storage Temperature
1. Exceeding any one or combination of these limits may cause permanent damage to this device.
1
M/A-COM Inc. and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice. M/A-COM makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does M/A-COM assume any liability whatsoever arising out of the use or application of any product(s) or information.
• North America Tel: 800.366.2266 / Fax: 978.366.2266 • Europe Tel: 44.1908.574.200 / Fax: 44.1908.574.300 • Asia/Pacific Tel: 81.44.844.8296 / Fax: 81.44.844.8298 Visit www.macom.com for additional data sheets and product information.
Voltage Variable Absorptive Attenuator 12 dB, DC-2.0 GHz
Electrical Specifications: TA = 25°C, Z0 = 50 Ω
Parameter
Insertion Loss
AT-259 V4
Test Conditions2
—
Frequency
DC - 0.1 GHz DC - 0.5 GHz DC - 1.0 GHz DC - 2.0 GHz DC - 2.0 GHz DC - 2.0 GHz DC - 2.0 GHz — — — — — — 0.05 GHz 0.5 - 2.0 GHz 0.05 GHz 0.5 - 2.0 GHz
Units
dB dB dB dB dB dB dB Ohms Ratio nS nS mV dBm dBm dBm dBm dBm dBm
Min
— — — — — — — — — — — — — — — — 18 18.5
Typ
2.9 3.0 3.2 3.4 + 0.2 + 2.3 + 7.0 50 2.1:1 3 5 10 — — 34 47 313 363
Max
3.1 3.2 3.5 3.8 + 0.4 + 2.5 + 7.5 — — — — — 13 21 — — — —
Flatness (Peak to Peak) Output Impedance VSWR Trise, Tfall Ton, Toff Transients Power Handling IP2 IP3
5 dB Attenuation 10 dB Attenuation 15 dB Attenuation — — 10% to 90% RF, 90% to 10% RF 50% Control to 90% RF, 50% Control to 10% RF In Band Linear Operation Absolute maximum Input Power Measured Relative to Input Power (For two-tone Input Power Up to +5 dBm) Measured Relative to Input Power (For two-tone Input Power Up to +5 dBm)
2. Control voltage: 0 to -4 volts @ 20 µA typical. 3. For levels above 6 dB attenuation. For levels below 6 dB, the minimum specification numbers apply.
SOT-143
2
M/A-COM Inc. and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice. M/A-COM makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does M/A-COM assume any liability whatsoever arising out of the use or application of any product(s) or information.
• North America Tel: 800.366.2266 / Fax: 978.366.2266 • Europe Tel: 44.1908.574.200 / Fax: 44.1908.574.300 • Asia/Pacific Tel: 81.44.844.8296 / Fax: 81.44.844.8298 Visit www.macom.com for additional data sheets and product information.
Voltage Variable Absorptive Attenuator 12 dB, DC-2.0 GHz
Typical Performance Curves
Insertion Loss vs. Frequency
4
20
AT-259 V4
Attenuation vs. Frequency
3
15
5 10 15
2
+25°C -40°C +85°C
10
1
5
0 0.0
0.5
1.0
1.5
2.0
0 0.0
0.5
1.0
1.5
2.0
Frequency (GHz)
Frequency (GHz)
VSWR vs. Frequency
2.0
15
Attenuation vs. Control Voltage, F = 950 MHz
1.8
10
1.6
0 12 5
1.4
5
1.2
1.0 0.0 0.5 1.0 1.5 2.0
0 -3.0
-2.5
-2.0
-1.5
-1.0
-0.5
0.0
Frequency (GHz)
Control Voltage (V)
3
M/A-COM Inc. and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice. M/A-COM makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does M/A-COM assume any liability whatsoever arising out of the use or application of any product(s) or information.
• North America Tel: 800.366.2266 / Fax: 978.366.2266 • Europe Tel: 44.1908.574.200 / Fax: 44.1908.574.300 • Asia/Pacific Tel: 81.44.844.8296 / Fax: 81.44.844.8298 Visit www.macom.com for additional data sheets and product information.
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