Digital Attenuator, 31 dB, 5-Bit,
TTL Driver, DC-4.0 GHz
AT90
-0263

CSP-1
V 6.00
Electrical Specifications TA = +25°C
Parameter Test Conditions Frequency Units Min Typical Max
Insertion Loss — DC - 4.0 GHz dB — 3.6 4.0
Attenuation
Accuracy
Individual Bits 1-2-4-8-16 dB

Any Combination of Bits
1 to 31 dB
DC - 3.0 GHz
DC - 4.0 GHz
DC - 4.0 GHz
dB
dB
dB
—
—
—
—
—
—
±(.3 +5% of atten setting)
±(.4 +6% of atten setting)
±(.5 +7% of atten setting)
VSWR Full Range DC - 4.0 GHz Ratio — 2.0:1 2.2:1
Switching Speed 50% Cntl to 90%/10% RF
10% to 90% or 90% to 10%
—
—
nS
nS
—
—
75
20
150
50
1 dB Compression —
—
50 MHz
0.5 - 4.0 GHz
dBm
dBm
—
—
+21
+29
—
—
Input IP3 Two-tone inputs up to +5 dBm 50 MHz
0.5-4.0 GHz
dB
dB
—
—
+35
+48
—
—
+Vcc
-Vee
—
—
—
—
V
V
4.75
-8.0
5.0
-5.0
5.25
-4.75
Logic “0” Sink Current is 20 µA max. — V 0.0 — 0.8
Logic “1” Source Current is 20 µA max. — V 2.0 — 5.0
Icc Vcc min to max,
Logic “0” or “1”
— mA — 0.2 6
-Iee -Vee min to max,
Logic “0” or “1”
— mA — -0.2 -1
Features
n Attenuation: 1.0dB Steps to 31dB
n Low DC Power Consumption
n Small Footprint, JEDEC Package
n Integral TTL Driver
n 50 ohm Impedance
n Test Boards are Available
n Tape and Reel Packaging Available

Description
M/A-COM's AT90-0263 is a GaAs FET 5-bit digital
attenuator with integral TTL driver. Step size is 1.0 dB
providing 31dB total attenuation range. This device is in a
FQFP-N plastic surface mount package. The AT90-0263 is
ideally suited for use where accuracy, fast speed, very low
power consumption and low costs are required.