MACOM AT-260TR, AT-260RTR, AT-260 Datasheet
Digital Attenuator, 31 dB, 5-Bit
DC – 2 GHz AT-260
F e a t u r e s
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Attenuation: 1-dB Steps to 31 dB
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Te m p e r a t u re Stability: ± 0.15 dB from -40°C
to +85°C Ty p i c a l
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Ultra Low DC Power Consumption
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Low Intermodulation Products: IP3= 50 dBm
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Low Cost SSOP 20 Plastic Package
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Tape and Reel Packaging Av a i l a b l e
D e s c r i p t i o n
M/A-COM's AT-260 is a 5-bit, 1-dB step GaAs MMIC digital attenuator in a low cost SSOP-20 surface mount plastic
package. The AT-260 is ideally suited for use where high
accuracy, fast switching, very low power consumption and
low intermodulation products are re q u i red at a low cost.
Typical applications include radio and cellular equipment,
w i reless LANS, GPS equipment and other Gain/Level
C o n t rol circ u i t s .
The AT-260 is fabricated with a monolithic GaAs MMIC
using a mature 1-micron process. The process features full
chip passivation for increased perf o rmance and re l i a b i l i t y .
Electrical Specifications,TA= 25°C
Parameter Test Conditions
Reference DC – 0.1 GHz dB 1.6 1.8
Insertion Loss DC – 0.5 GHz dB 1.7 1.9
Attenuation DC – 1.0 GHz ± (0.20 dB + 3% of Atten. Setting in dB) dB
Accuracy
VSWR (any state) 1.5:1
Trise, Tfall 10% to 90% RF, 90% to 10% RF nS 8
Ton, Toff 50% Control to 90% RF, 50% Control to 10% RF nS 15
Transients In Band mV 2
One dB Input Power 0.05 GHz dBm 20
Compression Input Power 0.5-2.0 GHz dBm 27
1. All measurements at 1 GHz in a 50Ω system, unless otherwise specified.
2.Attenuation accuracy specifications apply with negative bias control and low inductance grounding.
IP
IP
2
2
3
Measured Relative 0.05 GHz dBm 45
to Input Power 0.5-2.0 GHz dBm 60
(for two-tone input power up to +5 dBm)
Measured Relative 0.05 GHz dBm 34
to Input Power 0.5-2.0 GHz dBm 50
(for two-tone input power up to +5 dBm)
1
S S O P - 2 0
O rdering Info r m a t i o n
Part No. Package
AT-260 PIN SSOP 20-Lead
AT-260TR Forward Tape & Reel*
AT-260RTR Reverse Tape & Reel*
If specific reel size is requIred, consult factory for part number
*
assignment.
Unit Min. Typ. Max
DC – 1.0 GHz dB 1.9 2.2
DC – 2.0 GHz dB 2.2 2.5
DC – 2.0 GHz ± (0.30 dB + 3% of Atten.Setting in dB) dB
V 2.00
Absolute Maximum Ratings
0 = V
IN
Low = 0 V = 0 to -0.2 V @ 20 µA maximum
1 = V
IN
High = -5 V @ 20 µA typical to -8 V @ 200 µA maximum
1
Parameter Absolute Maximum
Max. Input Power
0.05 GHz +27 dBm
0.5–2.0 GHz +34 dBm
Control Voltage +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
V 2.00
Functional Sch e m a t i c
Pin Configuration
Pin No. Description Pin No. Description
1 VC1 11 RF1
2 VC1 12 GND
3 VC2 13 GND
4 VC2 14 GND
5 VC3 15 GND
6 VC3 16 GND
7 VC4 17 GND
8 VC4 18 GND
9 NC 19 GND
10 VC5 20 RF2
Truth Ta bl e
Control Inputs
VC5 VC4 VC4 VC3 VC3 VC2 VC2 VC1 VC1 Attenuation
1 1 0 1 0 1 0 1 0 Reference
0 1 0 1 0 1 0 1 0 1 dB
1 0 1 1 0 1 0 1 0 2 dB
1 1 0 0 1 1 0 1 0 4 dB
1 1 0 1 0 0 1 1 0 8 dB
1 1 0 1 0 1 0 0 1 16 dB
0 0 1 0 1 0 1 0 1 31 dB
(dB)
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