MACOM AT-230TR, AT-230RTR, AT-230 Datasheet
Features
● Attenuation 4-dB Steps to 28 dB
● High Accuracy +/- 3%
● Low DC Power Consumption: 50 µW
● Low Intermodulation Product: +50 dBm IP
3
● Temperature Range: -40˚C to +85˚C
● Low Cost SOIC14 Plastic Package
● Tape and Reel Packaging Available
1
Description
M/A-COM’s AT-230 is a 3-bit, 4-dB step GaAs MMIC
digital attenuator in a low cost SOIC 14-lead surface
mount plastic package. The AT-230 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-230 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 Attenuator, 28 dB, 3-Bit
DC - 2 GHz
AT-230
SO-14
Parameter Test Conditions Unit Min. Typ. Max
Reference Insertion Loss DC – 0.1 GHz dB 1.2 1.4
DC – 0.5 GHz dB 1.5 1.7
DC – 1.0 GHz dB 1.6 1.8
DC – 2.0 GHz dB 1.8 2.1
Attenuation Accuracy 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 1.2:1
Trise, Tfall 10% to 90% RF, 90% to 10% RF nS 12
Ton, Toff 50% Control to 90% RF, 50% Control to 10% RF nS 18
Transients In Band mV 25
1 dB Input Power 0.05 GHz dBm 20
Compression Input Power 0.5 – 2.0 GHz dBm 28
Measured Relative 0.05 GHz dBm 45
IP
2
to Input Power 0.5 – 2.0 GHz dBm 68
(for two-tone input power up to +5 dBm)
Measured Relative 0.05 GHz dBm 40
IP
3
to Input Power 0.5 – 2.0 GHz dBm 50
(for two-tone input power up to +5 dBm)
Electrical Specifications1, TA= +25°C
1. All measurements at 1 GHz in a 50Ω system, unless otherwise specified.
.013-.020 TYP
(0.33-0.51)
.0040-.0098
(0.10-0.25)
.2284-.2440
(5.80-6.20)
Pin #14
Orientation
Mark
Pin #1
.010(0.25) M B M
.1497-.1574
(3.80-4.00)
-B-
.3357-.3444
(8.55-8.75)
-A-
0.050(1.27) BSC.
.0532-.0688
(1.35-1.75)
.010(0.25) M C A M B S
14-Lead SOP outline dimensions
Narrow body .150
(All dimensions per JEDEC No. MS-012-AB, Issue C)
Dimensions in ( ) are in mm.
0°-8°
.0099-.0196 x 45° Chamfer
(0.25-0.50)
.016-.050
(0.40-1.27)
.0075-.0098
(0.19-0.25)
-C-
Ordering Information
Part Number Package
AT-230 PIN SOIC 14-Lead Plastic
AT-230TR Forward Tape & Reel
AT-230RTR Reverse Tape & Reel
Specifications Subject to Change Without Notice.
M/A-COM, Inc. ■ 1011 Pawtucket Boulevard, Lowell, MA 01853 USA ■ Telephone: 800-366-2266
V2.0
* If specific reel size is required, consult factory for part
number assignment.
0 = VIN Low = 0 V to -0.2 V @ 20 *A maximum
1 = VIN High = -5 V @ 10 *A typ. to -8 V @ 200 *A maximum
Parameter Absolute Maximum
Max. Input Power
50 MHz +27 dBm
500-2000 MHz +34 dBm
Control Voltage +5 V, -8.5 V
Operating Temperature -40°C to +85°C
Storage Temperature -65°C to +150°C
AT-230
Digital Attenuator, 28 dB, 3-Bit
14
RF1
13
GND
12
GND
11
GND
10
GND
9
GND
8
RF2
VC2 VC2
1
2
3
4
5
6
7
VC1 VC1 VC3
VC3 GND
16 dB 8 dB 4dB
Functional Schematic
Absolute Maximum Ratings
1
1. Operation of this device above any one of these parameters may cause
permanent damage
T ruth Table
VSWR vs FREQUENCY
0.5
1.0
1.5 2.0
2.0
1.4
0
VSWR
FREQUENCY (GHz)
1.8
1.6
1.2
1
4 dB ATTEN
INSERTION LOSS
8 dB ATTEN
16 dB ATTEN
T ypical P erformance
ATTENUATION vs FREQUENCY
0.5
1.0
1.5 2.0
0
-2
0
LOSS (dB)
FREQUENCY (GHz)
-10
-12
-16
-4
-6
-8
-14
-18
-20
-22
-24
-26
-28
-30
-32
ATTENUATION ACCURACY vs FREQUENCY
0.5
1.0
1.5 2.0
1.5
0
0
FREQUENCY (GHz)
1
0.5
-0.5
-1
4 dB ATTEN
8 dB ATTEN
16 dB ATTEN
-1.5
28 dB ATTEN
NOMINAL ATTENUATION (dB)
INSERTION LOSS vs FREQUENCY
0.5
1.0
1.5 2.0
3.0
0
LOSS (dB)
FREQUENCY (GHz)
2.0
1.0
0
+85°C
-40°C
+25°C
Control Input
VC3 VC3 VC2 VC2 VC1 VC1 Atten (dB)
1 0 1 0 1 0 Reference
0 1 1 0 1 0 4 dB
1 0 0 1 1 0 8 dB
1 0 1 0 0 1 16 dB
0 1 0 1 0 1 28 dB
M/A-COM, Inc. ■ 1011 Pawtucket Boulevard, Lowell, MA 01853 USA ■ Telephone: 800-366-2266
Specifications Subject to Change Without Notice. V2.0
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