Digital Attenuator, 32 dB, 2-Bit,
TTL Driver, DC - 2.0 GHz
AT
-
273
CR-11
V 7.00
Electrical Specifications: T
A
= 25C
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 -55C to +85C
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.
Digital Attenuator, 32 dB, 2-Bit, TTL Driver, DC - 2.0 GHz
AT-273
Specifications subject to change without notice.
n
North America: Tel. (800) 366-2266
n
Asia/Pacific: Tel.+81-44-844-8296, Fax +81-44-844-8298
n
Europe: Tel. +44 (1344) 869 595, Fax+44 (1344) 300 020
Visit www.macom.com for additional data sheets and product information.
V 7.00
2
Pin Configuration
Pin No.
Function
Pin No.
Function
1
C2
9
RF1
2
GND
10
GND
3
C1
11
GND
4
GND
12
GND
5
GND
13
Vee
6
GND
14
Vcc
7
GND
15
NC
8
RF2
16
NC
Absolute Maximum Ratings
1
1. Operation of this device above any one of these
parameters may cause permanent damage.
Parameter
Test Conditions
Frequency
Units
Min
Typ
Max
Input Leakage Current (Low)
Input Leakage Current (High)
0 to 0.8V
2.0 to 5.0V
--
--
A
A
--
--
--
--
1.0
1.0
Icc
Vcc = 4.5 to 5.5V
Vctl = 0 to 0.8V, or Vcc 2.1V to Vcc
--
mA
--
--
2.0
-Iee
Vee = -5.0 to -8.0V
--
mA
--
--
-1
Electrical Specifications: T
A
= 25C
Parameter
Absolute Maximum
Max. Input Power
0.05 GHz
0.5 - 2.0 GHz
+27 dBm
+34 dBm
+Vcc
+5.5V
-Vee
-8.5V
Control Voltage
-0.5 to Vcc + 0.5V
Operating Temperature
-55C to +125C
Storage Temperature
-65C to +150C
Truth Table
C1
C2
Attenuation
0
0
Loss, Reference
0
1
16.0 dB
1
1
32.0 dB
0 = TTL Low; 1 = TTL High
Ordering Information
Part Number
Package
AT-273
Bulk Packaging
AT-273TR
Tape and Reel
PDF 
ZIP