V 2.00
Parameter
Test Conditions
2
Unit
Min.
Typ.
Max
Reference Insertion Loss
DC 0.1 GHz
dB
0.9
1.2
DC 0.5 GHz
dB
1.3
1.5
DC 1.0 GHz
dB
1.5
1.8
DC 2.0 GHz
dB
1.8
2.0
Attenuation Accuracy
3
DC 1.0 GHz (0.15 dB + 3% of Attenuation Setting in dB) dB
DC 2.0 GHz (0.30 dB + 3% of Attenuation Setting in dB) dB
VSWR
1.8:1
Trise, Tfall
10% to 90% RF, 90% to 10% RF
nS
10
Ton, Toff
50% Control to 90% RF, 50% Control to 10% RF
nS
15
Transients
In Band
mV
18
1 dB
Input Power
0.05 GHz
dBm
22
Compression
Input Power
0.5 2.0 GHz
dBm
28
Measured Relative
0.05 GHz
dBm
49
IP2
to Input Power
0.5 2.0 GHz
dBm
72
(For two-tone Input Power Up to +5 dBm)
Measured Relative
0.05 GHz
dBm
45
IP3
to Input Power
0.5 2.0 GHz
dBm
50
(For two-tone Input Power Up to +5 dBm)
Features
q
Attenuation 1-dB Steps to 15 dB
q
High Accuracy +/-3%
q
Temperature Stability +/-0.15 dB from -40C to +85C
q
Low Intermodulation Product: +50 dBm IP3
q
Low DC Power Consumption: 50 W
q
Low Cost SOIC16 Plastic Package
q
Tape and Reel Packaging Available
1
Description
M/A-COM's AT-210 is a 4-bit, 1-dB step GaAs MMIC digi-
tal attenuator in a low cost SOIC 16-lead surface mount
plastic package. The AT-210 is ideally suited for use where
high accuracy, fast switching, very low power consumption
and low intermodulation products are required. Typical
applications include radio, cellular, and wireless LANs, GPS
equipment and other Gain/Level Control circuits.
The AT-210 is fabricated with a monolithic GaAs MMIC
using a mature 1-micron process. The process features full
chip passivation for increased performance and reliability.
Digital Attenu a t o r, 15 dB, 4-Bit
DC - 2 GHz
AT-210
S O - 1 6
Electrical Specifications, T
A
= +25C
1. Refer to "Tape and Reel Packaging"Section, or contact factory.
2. All measurements at 1 GHz in a 50
system, unless otherwise specified.
3.Attenuation accuracy specifications apply with negative bias control and low inductance grounding.
Ordering Information
Part Number
Package
AT-210 PIN
SOIC 16-Lead Plastic Package
AT-210TR
Forward Tape & Reel
AT-210RTR
Reverse Tape & Reel
V 2.00
Digital Attenuator, 15 dB, 4-Bit
AT-210
Functional Sch e m a t i c
Absolute Maximum Ratings
1.Operation of this device above any one of these parameters may
cause permanent damage.
Parameter
Absolute Maximum
1
Max. Input Power
50 MHz
+27 dBm
500-2000 MHz
+34 dBm
Control Voltage
+5 V, -8.5 V
Operating Temperature
-40C to +85C
Storage Temperature
-65C to +150C
Typical Performance
Pin Configuration
Pin
Description
Pin No.
Description
1
VC1
9
RF2
2
VC1
10
GND
3
VC2
11
GND
4
VC2
12
GND
5
VC3
13
GND
6
VC3
14
GND
7
VC4
15
GND
8
VC4
16
RF1
Control Inputs
VC4 VC4 VC3 VC3 VC2 VC2 VC1 VC1 Attenuation
(dB)
1
0
1 0 1
0
1 0 Reference
0
1
1 0
1
0
1
0
1 dB
1
0
0 1
1
0
1
0
2 dB
1
0
1 0
0
1
1 0
4 dB
1
0
1 0
1
0
0
1
8 dB
0
1
0 1
0
1
0
1
15 dB
"0" = Vin Low, Vin Low = 0V, "1" = Vin High, Vin High = -5V
"0" = 0 to -0.2V @ 20 A Max
"1" = -5V @ 10 A typ to -8V @ 200 A Max
3
2
1
0
RF1 GND GND
GND GND GND RF2
GND
VC1 VC1 VC2
VC3 VC3 VC4 VC4
VC2
8 dB
4 dB
2 dB
1 dB
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
Truth Ta bl e
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