Digital Attenuator, 30 dB, 4-Bit
DC-2.0 GHz
Features
•
•
•
•
•
•
•
Attenuation 2-dB Steps to 30 dB
High Accuracy
Low Intermodulation Product: +50 dBm IP3
Low DC Power Consumption: 50 µW
SOIC-16 Plastic Package
Tape and Reel Packaging Available
Temperature Stability +/-0.15 dB: -40°C to +85°C
AT-220
V5
Functional Schematic
RF1
16
GND
15
GND
14
GND
13
GND GND
12
11
GND
10
RF2
9
16 dB
8 dB
4 dB
2 dB
Description
M/A-COM’s AT-220 is a 4-bit, 2-dB step GaAs MMIC
digital attenuator in a low cost SOIC 16-lead surface
mount plastic package. The AT-220 is ideally suited
for use where high accuracy, fast switching, very low
power consumption and low intermodulation
products are required. Typical applications include
radio and cellular equipment, wireless LANs, GPS
equipment and other Gain/Level Control circuits.
The AT-220 is fabricated with a monolithic GaAs
MMIC using a mature 1-micron process. The
process features full chip passivation for increased
performance and reliability.
1
2
3
4
5
6
7
8
VC1
VC1
VC2
VC2
VC3
VC3
VC4
VC4
Pin Configuration
Pin No.
1
2
3
Function
VC1
VC1
VC2
VC2
VC3
VC3
VC4
VC4
Pin No.
9
10
11
12
13
14
15
16
Function
RF2
GND
GND
GND
GND
GND
GND
RF1
Ordering Information
Part Number
AT-220 PIN
AT-220TR*
4
5
Package
SOIC 16-Lead Plastic Package
1000 piece reel
6
7
8
* Reference Application Note M513 for reel size information.
Absolute Maximum Ratings
1
Parameter
Input Power:
50 MHz
500-2000 MHz
Control Voltage
Operating Temperature
Storage Temperature
Absolute Maximum
+27 dBm
+34 dBm
-8.5 V
≤
V
C
≤
5V
-40°C to +85°C
-65°C to +150°C
1. Exceeding any one or combination of these limits may cause
permanent damage to this device.
1
M/A-COM Inc. and its affiliates reserve the right to make changes to the
product(s) or information contained herein without notice. M/A-COM makes
no warranty, representation or guarantee regarding the suitability of its
products for any particular purpose, nor does M/A-COM assume any liability
whatsoever arising out of the use or application of any product(s) or
information.
•
North America
Tel: 800.366.2266 / Fax: 978.366.2266
•
Europe
Tel: 44.1908.574.200 / Fax: 44.1908.574.300
•
Asia/Pacific
Tel: 81.44.844.8296 / Fax: 81.44.844.8298
Visit www.macom.com for additional data sheets and product information.
Digital Attenuator, 30 dB, 4-Bit
DC-2.0 GHz
Electrical Specifications: T
A
= 25°C, V
C
= 0
V
/ −5
V, Z
0
= 50
Ω
Parameter
Insertion Loss (reference state)
AT-220
V5
Test Conditions
Frequency
DC - 0.5 GHz
DC - 1.0 GHz
DC - 2.0 GHz
DC - 1.0 GHz
DC - 2.0 GHz
Units
dB
dB
dB
Min
—
—
—
Typ
1.5
1.6
1.8
Max
1.7
1.8
2.1
Attenuation Accuracy
2
VSWR
Trise, Tfall
Ton, Toff
Transients
1 dB Compression
IP
2
IP
3
Control Current
2.
10% to 90% RF, 90% to 10% RF
50% Control to 90% RF,
50% Control to 10% RF
In-Band
Input Power
Input Power
Measured Relative to Input Power
(For two-tone input power up to +5 dBm)
Measured Relative to Input Power
(For two-tone input power up to +5 dBm)
|V
C
| = 5 V
± (0.15 dB + 3% of Atten Setting in dB) dB
± (0.30 dB + 4% of Atten Setting in dB) dB
Ratio
—
—
—
—
—
—
—
—
—
—
—
1.2:1
12
18
25
20
28
45
68
40
50
—
—
—
—
—
—
—
—
—
—
100
—
—
—
0.05 GHz
0.5 - 2.0 GHz
0.05 GHz
0.5 - 2.0 GHz
0.05 GHz
0.5 - 2.0 GHz
nS
nS
mV
dBm
dBm
dBm
dBm
dBm
dBm
µA
Attenuation accuracy specifications apply with negative bias control and low inductance grounding.
SOIC-16
Truth Table
3
Control Inputs
VC4 VC4 VC3
1
0
1
1
1
0
3.
0
1
0
0
0
1
1
1
0
1
1
0
VC3
0
0
1
0
0
1
VC2
1
1
1
0
1
0
VC2
0
0
0
1
0
1
VC1
1
1
1
1
0
0
VC1
Attenuation
(dB)
0
0
0
0
1
1
Reference
State
2 dB
4 dB
8 dB
16 dB
30 dB
0 = -0.2 V to 0 V, 1 = -8 V to -5 V.
2
M/A-COM Inc. and its affiliates reserve the right to make changes to the
product(s) or information contained herein without notice. M/A-COM makes
no warranty, representation or guarantee regarding the suitability of its
products for any particular purpose, nor does M/A-COM assume any liability
whatsoever arising out of the use or application of any product(s) or
information.
•
North America
Tel: 800.366.2266 / Fax: 978.366.2266
•
Europe
Tel: 44.1908.574.200 / Fax: 44.1908.574.300
•
Asia/Pacific
Tel: 81.44.844.8296 / Fax: 81.44.844.8298
Visit www.macom.com for additional data sheets and product information.
Digital Attenuator, 30 dB, 4-Bit
DC-2.0 GHz
Typical Performance Curves
Insertion Loss
3
AT-220
V5
Attenuation
0
-5
2
-10
-15
1
+25°C
-40°C
+85°C
-20
-25
0
0.0
-30
0.5
1.0
1.5
2.0
0.0
0.5
1.0
1.5
2.0
Frequency (GHz)
Frequency (GHz)
VSWR
2.0
IL
2 dB
4 dB
8 dB
16 dB
Attenuation Accuracy
1.5
AttenDev 2
AttenDev4
Attendev8
AttenDev16
AttenDev30
1.8
1.0
1.6
0.5
0.0
1.4
-0.5
1.2
-1.0
1.0
0.0
0.5
1.0
1.5
2.0
-1.5
0.0
0.5
1.0
1.5
2.0
Frequency (GHz)
Frequency (GHz)
3
M/A-COM Inc. and its affiliates reserve the right to make changes to the
product(s) or information contained herein without notice. M/A-COM makes
no warranty, representation or guarantee regarding the suitability of its
products for any particular purpose, nor does M/A-COM assume any liability
whatsoever arising out of the use or application of any product(s) or
information.
•
North America
Tel: 800.366.2266 / Fax: 978.366.2266
•
Europe
Tel: 44.1908.574.200 / Fax: 44.1908.574.300
•
Asia/Pacific
Tel: 81.44.844.8296 / Fax: 81.44.844.8298
Visit www.macom.com for additional data sheets and product information.
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