Digital Attenuator, 15 dB, 4-Bit,
TTL Driver, DC - 3.0 GHz
AT65
-0413

SO-16
V 5.00
Electrical Specifications: TA = 25°C
Features
n Attenuation: 1.0 dB steps to 15 dB
n Low DC Power Consumption
n Integral TTL Driver
n 50 Ohm Impedance
n Temperature Stability: ±0.18 dB from -55°C to +85°C
Typ.

Description
M/A-COM’s AT65-0413 is a GaAs FET 4-bit digital
attenuator with a 1.0 dB minimum step size and a 15 dB
total attenuation range. This device is in a SOIC-16 plastic
surface mount package. The AT65-0413 is ideally suited for
use where accuracy, fast speed, very low power
consumption and low costs are required. Typical
applications include dynamic range setting in precision
receiver circuits and other gain/leveling control circuits.
Parameter Test Conditions Frequency Units Min. Typ. Max.
Insertion Loss — DC - 0.5 GHz
DC - 2.0 GHz
DC - 3.0 GHz
dB
dB
dB
—
—
—
1.3
1.7
1.9
1.6
2.1
2.4
Attenuation Accuracy Any Bit or Combination of Bits DC - 3.0 GHz dB ± (.25 + 3% of attenuation) or ± .55 dB
VSWR Full Range DC - 3.0 GHz Ratio — — 1.6:1
Trise, Tfall
Ton, Toff
Transients
10% to 90%
50% Cntl to 90%/10% RF
In-Band
nS
nS
mV
—
—
—
10
30
35
50
150
—
1 dB Compression Input Power
Input Power
0.05 GHz
0.5 - 3.0 GHz
dBm
dBm
—
—
+20
+28
—
—
Input IP3 Two-tone inputs up to +5 dBm 0.05 GHz
0.5 - 3.0 GHz
dBm
dBm
—
—
+40
+50
—
—
Input IP2 Two-tone inputs up to +5 dBm 0.05 GHz
0.5 - 3.0 GHz
dBm
dBm
—
—
+45
+68
—
—
Vcc
-VEE
— —
—
V
V
4.5
-8.0
5.0
-5.0
5.5
-4.75
Vctl
Vctl
Logic (0) TTL
Logic (1) TTL
—
—
V
V
0.0
2.0
—
—
0.8
5.0
-Iee Vee = -5.0 to –8.0V — mA — — -1
Input Leakage
Current (Low)
Input Leakage
Current (High)
0 to 0.8 V

2.0 to 5.0 V
—

—
µA

µA
—

—
—

—
20

20
Icc Vcc = 4.5 to 5.5V
Vctl = 0 to 0.8V,
or Vcc -2.1V to Vcc
— mA — — 4.0