Digital Attenuator, 30 dB, 4-Bit,
TTL Driver, DC - 2.5 GHz
AT90
-0233

CSP-1
V 1.00
Features
n Attenuation: 2 dB Steps to 30 dB
n Low DC Power Consumption
n Small Footprint, JEDEC Package
n Integral TTL Driver
n 50 Ohm Impedance
n Test Boards Available
n Tape and Reel Packaging Available

Description
M/A-COM’s AT90-0233 is a GaAs FET 4-Bit digital
attenuator with integral driver. Step size is 2 dB providing
a 30 dB attenuation range. This device is in an FQFP-N
plastic surface mount package. The AT90-0233 is suited
for use where accuracy, fast speed, very low power
consumption and low costs are required.

Electrical Specifications TA = +25°C
Parameter Test Conditions Frequency Units Min Typical Max
Insertion Loss — DC - 2.5 GHz dB — 2.7 3.0
Attenuation
Accuracy
Individual Bits or Combination
of Bits
DC - 2.5 GHz dB — — ±(.3 +5% of atten setting)
VSWR Full Range DC - 2.5 GHz Ratio — 1.5:1 1.8:1
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 - 2.5 GHz
dBm
dBm
—
—
+21
+29
—
—
Input IP3 Two-tone inputs up to +5 dBm 50 MHz
0.5 - 2.5 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