Digital Attenuator, 31.5 dB, 6-Bit,
TTL Driver, DC-4.0 GHz
AT90
-1107

CSP-1
V 7.00
Electrical Specifications TA = +25°C
Parameter Test Conditions Frequency Units Min Typica Max
Insertion Loss — DC - 4.0 GHz dB — 4.5 5.1
Attenuation
Accuracy
Individual Bits 0.5-1-2-4-8-16 dB
Any Combination of Bits
1 to 31.5 dB
DC - 4.0 GHz
DC - 4.0 GHz
dB
dB
—
—
—
—
±(.3 +7% of atten setting)
±(.5 +8% 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 — — V 4.75 5.0 5.25
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 — 6 10
Features
n Attenuation: 0.5 dB Steps to 31.5 dB
n Single Positive Supply
n Contains internal DC to DC converter
n Low DC Power Consumption
n Small Footprint, JEDEC Package
n Integral TTL Driver
n 50 ohm Impedance

Description
M/A-COM's AT90-1107 is a GaAs FET 6-bit digital
attenuator with integral TTL driver. Step size is 0.5 dB pro-
viding a 31.5 dB total attenuation range. This device is in an
FQFP-N plastic surface mount package. The AT90-1107 is
ideally suited for use where accuracy, fast speed, very low
power consumption and low costs are required.