MACOM AT-280TR, AT-280RTR, AT-280 Datasheet

O rdering Info r m a t i o n

*

If specific reel size is required, consult factory for part number
assignment.

Digital Attenuator, 15.5 dB, 5-Bit

DC - 2 GHz AT-280

Parameter Test Conditions

2

Unit Min. Typ. Max

Reference DC – 0.1 GHz dB 1.1 1.3

Insertion DC – 0.5 GHz dB 1.3 1.5

Loss DC – 1.0 GHz dB 1.5 1.8

DC – 2.0 GHz dB 1.8 2.0

Attenuation Accuracy

2

DC – 1.0 GHz ± (0.20 dB + 3% of Atten. Setting in dB) dB
DC – 2.0 GHz ± (0.30 dB + 3% of Atten. Setting in dB) dB

VSWR (any state) 1.5:1 1.8:1

Trise, Tfall 10% to 90% RF, 90% to 10% RF nS 12

Ton, Toff 50% Control to 90% RF, 50% Control to 10% RF nS 18

Transients In Band mV 30

One dB Input Power 0.05 GHz dBm 22

Compression Input Power 0.5 – 2.0 GHz dBm 27

IP

2

Measured Relative 0.05 GHz dBm 53
to Input Power 0.5 – 2.0 GHz dBm 68
(for two-tone input power up to +5 dBm)

IP

3

Measured Relative 0.05 GHz dBm 40
to Input Power 0.5 – 2.0 GHz dBm 45
(for two-tone input power up to +5 dBm)

Electrical Specifications,TA= 25°C

F e a t u r e s

●

Attenuation: 0.5-dB Steps to 15.5 dB

●

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

●

Ultra Low DC Power Consumption

●

Low Intermodulation Products, IP3: 45 dBm

●

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-280 is a 5-bit, 0.5 dB-step GaAs MMIC
digital attenuator in a low cost SOIC 16-lead surface mount
plastic package. The AT-280 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, wireless LANS, GPS equipment and other
Gain/Level Control circ u i t s .

S O - 1 6

V 2.00

The AT-280 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 .

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.

Part Number Package

AT-280 PIN SOIC 16-Lead
AT-280TR Forward Tape & Reel*
AT-280RTR Reverse Tape & Reel*

Digital Attenuator, 15.5 dB, 5-Bit AT-280

Functional Sch e m a t i c

Parameter Absolute Maximum

1

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

Absolute Maximum Ratings

1

1.Operation of this device above any one of these parameters may cause
permanent damage.

Truth Ta bl e

Control Inputs

VC5 VC4 VC3 VC3 VC2 VC2 VC1 VC1

1 1 1 0 1 0 1 0 Reference
0 1 1 0 1 0 1 0 0.5 dB
1 0 1 0 1 0 1 0 1 dB
1 1 0 1 1 0 1 0 2 dB
1 1 1 0 0 1 1 0 4 dB
1 1 1 0 1 0 0 1 8 dB
0 0 0 1 0 1 0 1 15.5 dB

0 = VinLow = 0 V = 0 to -0.2 V @ 20 A maximum

Attenuation (dB)

V 2.00

Typical Pe r fo r m a n c e