AT-280
Digital Attenuator, 15.5 dB, 5-Bit
DC - 2.0 GHz
Rev. V5
Electrical Specifications: TA = 25°C, Z0 = 50 Ω
Parameter
Test Conditions
Units
Min
Typ
Max
Reference Insertion Loss
Attenuation Accuracy 3
DC—0.1 GHz
DC—0.5 GHz
DC—1.0 GHz
DC—2.0 GHz
DC—1.0 GHz
DC—2.0 GHz
dB
—
1.1
1.3
dB
—
1.3
1.5
dB
—
1.5
1.8
dB
—
1.8
2.0
± (0.20 dB +3% of Attenuation Setting in dB) dB
± (0.30 dB +3% of Attenuation Setting in dB) dB
VSWR
(Any state)
Ratio
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
—
1 dB Compression
IP2
IP3
Input Power, 0.05 GHz
Input Power, 0.5 - 2.0 GHz
0.05 GHz
0.5 - 2.0 GHz
Measured Relative to Input Power
(for two-tone input power up to +5 dBm)
0.05 GHz
0.5 - 2.0 GHz
Measured Relative to Input Power
(for two-tone input power up to +5 dBm)
dBm
—
22
—
dBm
—
27
—
dBm
—
53
—
dBm
—
68
—
dBm
—
40
—
dBm
—
45
—
3. Attenuation acccuracy specifications apply with negative bias control and low inductance grounding.
SOIC-16
Truth Table 4,5
Control Inputs
VC VC VC VC VC VC VC VC Atten.
5 4 3 3 2 2 1 1 (dB)
1
1
1
0
101
0 Refer-
ence
0
1
1
0
101
0 0.5 dB
1
0
1
0
1010
1 dB
1
1
0
1
1010
2 dB
1
1
1
0
0110
4 dB
1
1
1
0
1001
8 dB
0
0
0
1
010
1 15.5 dB
4. 0 = Vin Low = 0 V = 0 to –0.2 V @ 20 µA maximum
5. 1 = Vin High = -5 V at 20 µA to -8 V at 20 µA maximum
2
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