Digital Attenuator, 32 dB, 2-Bit,
TTL Driver, DC - 2.0 GHz
AT
-273

CR-11
V 7.00
Electrical Specifications: TA = 25°C
Parameter Test Conditions Frequency Units Min Typ Max
Insertion Loss — DC - 0.5 GHz
DC - 1.0 GHz
DC - 2.0 GHz
dB
dB
dB
—
—
—
—
—
—
1.6
1.7
1.9
Attenuation Accuracy C1 Bit
Full Attenuation (32 dB)
Full Attenuation (32 dB)
Full Attenuation (32 dB)
DC - 2.0 GHz
DC - 0.5 GHz
DC - 1.0 GHz
DC - 2.0 GHz
± 3% of attenuation setting in dB
± 3% of attenuation setting in dB
± 3% of attenuation setting in dB, -1 dB
± 3% of attenuation setting in dB, -3 dB
VSWR Full Range DC - 2.0 GHz Ratio — — 1.6:1
Trise, Tfall 10% to 90% — ns — 7 —
Ton, Toff 50% Cntl to 90% / 10% RF — ns — 28 —
Transients In-Band (peak-to-peak) — mV — 30 —
1 dB Compression Input Power
Input Power
0.05 GHz
0.5 - 2.0 GHz
dBm
dBm
—
—
+20
+28
—
—
Input IP3 Two-tone inputs up to +5 dBm 0.05 GHz
0.5 - 2.0 GHz
dBm
dBm
—
—
+38
+48
—
—
Input IP2 Two-tone inputs up to +5 dBm 0.05 GHz
0.5 - 2.0 GHz
dBm
dBm
—
—
+44
+68
—
—
Vcc
-Vee
—
—
—
—
V
V
4.5
-8.0
5.0
—
5.5
-5.0
Vctl
Vctl
Logic (0) TTL
Logic (1) TTL
—
—
V
V
0.0
2.0
—
—
0.8
5.0
Features
n Attenuation: 16.0 dB Steps to 32 dB
n Low DC Power Consumption
n Hermetic Surface Mount Package
n Integral TTL Driver
n 50 ohm Impedance
n Temperature Stability: ±0.18 dB from -55°C to +85°C
Typ.
n Tape and Reel Packaging Available

Description
M/A-COM's AT-273 is a GaAs FET digital attenuator
with a 16.0 dB minimum step size and a 32 dB total
attenuation range. This attenuator and integral TTL driver
is in a hermetically sealed ceramic 16-lead surface mount
package. The AT-273 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.