Digital Attenuator, 31 dB, 5-Bit,
TTL Driver, DC - 2 GHz
V 3.00
AT-263
Features
n
Attenuation: 1 dB steps to 31 dB
n
Temperature Stability: 鹵 0.18 dB from 鈥?5擄C to +85擄C
n
n
n
n
CR-12
Typical
Low DC Power Consumption
Hermetic Surface Mount Package
Integral TTL Driver
50 Ohm Nominal Impedance
Description
M/A-COM鈥檚 AT-263 is a GaAs FET 5-bit digital
attenuator with a 1 dB minimum step size and 31 dB total
attenuation. This attenuator and integral TTL driver is in a
hermetically sealed ceramic 16-lead surface mount package.
The AT-263 is ideally suited for use where accuracy, fast
switching, very low power consumption and low
intermodulation products are required. Typical applications
include dynamic range setting in precision receiver circuits
and other gain/leveling control circuits. Environmental
screening is available. Contact the factory for information.
Electrical Specifications
1
(From 鈥?5擄C to +85擄C)
Parameter
Reference Insertion Loss
Test Conditions
鈥?/div>
Frequency
DC - 0.5 GHz
DC - 1.0 GHz
DC - 2.0 GHz
DC - 1.0 GHz
DC - 2.0 GHz
DC - 2.0 GHz
鈥?/div>
鈥?/div>
鈥?/div>
0.05 GHz
0.5 - 2.0 GHz
0.05 GHz
0.5 - 2.0 GHz
0.05 GHz
0.5 - 2.0 GHz
鈥?/div>
鈥?/div>
Units
dB
dB
dB
Min
鈥?/div>
鈥?/div>
鈥?/div>
Typ
鈥?/div>
鈥?/div>
鈥?/div>
Max
2.4
2.8
3.0
Attenuation Accuracy
2
Any Single Bit
Any Combination of Bits
鈥?/div>
10% to 90%
50% Control to 90/10% RF
In-Band (peak-peak)
Input Power
Input Power
For two-tone Input Power
Up to +5 dBm
For two-tone Input Power
Up to +5 dBm
鈥?/div>
鈥?/div>
鹵 (0.25 +3% of atten setting in dB) dB
鹵 (0.25 +3% of atten setting in dB) dB
or 鹵 0.4 dB, whichever is greater
Ratio
ns
ns
mV
dBm
dBm
dBm
dBm
dBm
dBm
V
V
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
4.5
-8.0
鈥?/div>
9
40
30
+20
+28
+40
+48
+45
+68
5.0
鈥?/div>
1.6:1
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
5.5
-5.0
VSWR
Trise, Tfall
Ton, Toff
Transients
1 dB Compression
Input IP3
Input IP2
Vcc
Vee
1. All specifications apply when operated with bias voltages of +5V for Vcc and 鈥?.0V for Vee.
2. This attenuator is guaranteed monotonic.
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