Part No.
Package
AT-260 PIN
SSOP 20-Lead
AT-260TR
Forward Tape & Reel
*
AT-260RTR
Reverse Tape & Ree
l*
Parameter
Test Conditions
1
Unit
Min.
Typ.
Max
Reference
DC 0.1 GHz
dB
1.6
1.8
Insertion Loss
DC 0.5 GHz
dB
1.7
1.9
DC 1.0 GHz
dB
1.9
2.2
DC 2.0 GHz
dB
2.2
2.5
Attenuation
DC 1.0 GHz (0.20 dB + 3% of Atten. Setting in dB) dB
Accuracy
2
DC 2.0 GHz (0.30 dB + 3% of Atten.Setting in dB) dB
VSWR
(any state)
1.5:1
Trise, Tfall
10% to 90% RF, 90% to 10% RF
nS
8
Ton, Toff
50% Control to 90% RF, 50% Control to 10% RF
nS
15
Transients
In Band
mV
2
One dB
Input Power
0.05 GHz
dBm
20
Compression
Input Power
0.5-2.0 GHz
dBm
27
IP2
Measured Relative
0.05 GHz
dBm
45
to Input Power
0.5-2.0 GHz
dBm
60
(for two-tone input power up to +5 dBm)
IP3
Measured Relative
0.05 GHz
dBm
34
to Input Power
0.5-2.0 GHz
dBm
50
(for two-tone input power up to +5 dBm)
F e a t u r e s
Attenuation: 1-dB Steps to 31 dB
Te m p e r a t u re Stability: 0.15 dB from -40C
to +85C Ty p i c a l
Ultra Low DC Power Consumption
Low Intermodulation Products: IP3 = 50 dBm
Low Cost SSOP 20 Plastic Package
Tape and Reel Packaging Av a i l a b l e
D e s c r i p t i o n
M/A-COM's AT-260 is a 5-bit, 1-dB step GaAs MMIC digi-
tal attenuator in a low cost SSOP-20 surface mount plastic
package. The AT-260 is ideally suited for use where high
accuracy, fast switching, very low power consumption and
low intermodulation products are re q u i red at a low cost.
Typical applications include radio and cellular equipment,
w i reless LANS, GPS equipment and other Gain/Level
C o n t rol circ u i t s .
The AT-260 is fabricated with a monolithic GaAs MMIC
using a mature 1-micron process. The process features full
chip passivation for increased perf o rmance and re l i a b i l i t y .
Digital Attenuator, 31 dB, 5-Bit
DC 2 GHz
AT-260
S S O P - 2 0
1. All measurements at 1 GHz in a 50
system, unless otherwise specified.
2.Attenuation accuracy specifications apply with negative bias control and low inductance grounding.
q
q
q
q
q
q
O rdering Info r m a t i o n
Electrical Specifications, T
A
= 25C
*
If specific reel size is requIred, consult factory for part number
assignment.
V 2.00
V 2.00
Parameter
Absolute Maximum
Max. Input Power
0.05 GHz
+27 dBm
0.52.0 GHz
+34 dBm
Control Voltage
+5V, 8.5V
Operating Temperature
40C to +85C
Storage Temperature
65C to +150C
Control Inputs
VC5 VC4 VC4 VC3 VC3 VC2 VC2 VC1 VC1 Attenuation
(dB)
1
1
0
1
0
1
0
1
0
Reference
0
1
0
1
0
1
0
1
0
1 dB
1
0
1
1
0
1
0
1
0
2 dB
1
1
0
0
1
1
0
1
0
4 dB
1
1
0
1
0
0
1
1
0
8 dB
1
1
0
1
0
1
0
0
1
16 dB
0
0
1
0
1
0
1
0
1
31 dB
Absolute Maximum Ratings
1
Functional Sch e m a t i c
Pin No.
Description
Pin No.
Description
1
VC1
11
RF1
2
VC1
12
GND
3
VC2
13
GND
4
VC2
14
GND
5
VC3
15
GND
6
VC3
16
GND
7
VC4
17
GND
8
VC4
18
GND
9
NC
19
GND
10
VC5
20
RF2
1. Operation of this device above any one of these parameters may
cause permanent damage.
Typical Performance
Pin Configuration
Truth Ta bl e
0 = V
IN
Low = 0 V = 0 to -0.2 V @ 20 A maximum
1 = V
IN
High = -5 V @ 20 A typical to -8 V @ 200 A maximum
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