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Digital Attenuator, 28 dB, 3-Bit DC - 2 GHz
Features
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AT-230
SO-14
Pin #14
Attenuation 4-dB Steps to 28 dB High Accuracy +/- 3% Low DC Power Consumption: 50 W Low Intermodulation Product: +50 dBm IP3 Temperature Range: -40C to +85C Low Cost SOIC14 Plastic Package Tape and Reel Packaging Available1
Orientation Mark Pin #1 .3357-.3444 (8.55-8.75) -A0.050(1.27) BSC. .013-.020 TYP (0.33-0.51)
.1497-.1574 .2284-.2440 (3.80-4.00) (5.80-6.20) .010(0.25) M B M -B.0532-.0688 (1.35-1.75) -C.0040-.0098 (0.10-0.25) 0-8 .016-.050 (0.40-1.27) .0075-.0098 (0.19-0.25)
.0099-.0196 x 45 Chamfer (0.25-0.50)
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.
.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.
Ordering Information
Part Number AT-230 PIN AT-230TR AT-230RTR Package SOIC 14-Lead Plastic Forward Tape & Reel Reverse Tape & Reel
Electrical Specifications1, TA = +25C
Parameter Reference Insertion Loss Test Conditions
* If specific reel size is required, consult factory for part number assignment. Unit Min. Typ. Max dB 1.2 1.4 dB 1.5 1.7 dB 1.6 1.8 dB 1.8 2.1 (0.15 dB +3% of Attenuation Setting in dB) dB (0.30 dB +3% of Attenuation Setting in dB) dB 1.2:1 nS 12 nS 18 mV 25 dBm 20 dBm 28 dBm 45 dBm 68 dBm dBm 40 50
Attenuation Accuracy VSWR Trise, Tfall Ton, Toff Transients 1 dB Compression IP2
DC - 0.1 GHz DC - 0.5 GHz DC - 1.0 GHz DC - 2.0 GHz DC - 1.0 GHz DC - 2.0 GHz 10% to 90% RF, 90% to 10% RF 50% Control to 90% RF, 50% Control to 10% RF In Band Input Power 0.05 GHz Input Power 0.5 - 2.0 GHz Measured Relative 0.05 GHz to Input Power 0.5 - 2.0 GHz (for two-tone input power up to +5 dBm) Measured Relative 0.05 GHz to Input Power 0.5 - 2.0 GHz (for two-tone input power up to +5 dBm)
IP3
1. All measurements at 1 GHz in a 50 system, unless otherwise specified.
Specifications Subject to Change Without Notice.
V2.0 s
M/A-COM, Inc.
s
1011 Pawtucket Boulevard, Lowell, MA 01853 USA
Telephone: 800-366-2266
Digital Attenuator, 28 dB, 3-Bit Absolute Maximum Ratings1
Parameter Max. Input Power 50 MHz 500-2000 MHz Control Voltage Operating Temperature Storage Temperature Absolute Maximum
AT-230 Functional Schematic
RF1 14 GND 13 GND 12 GND 11 GND 10 GND 9
4dB
RF2 8
+27 dBm +34 dBm +5 V, -8.5 V -40C to +85C -65C to +150C
16 dB
8 dB
1. Operation of this device above any one of these parameters may cause permanent damage
Truth Table
Control Input VC3 1 0 1 1 0 VC3 0 1 0 0 1 VC2 1 1 0 1 0 VC2 0 0 1 0 1 VC1 1 1 1 0 0 VC1 0 0 0 1 1 Atten (dB) Reference 4 dB 8 dB 16 dB 28 dB
1 VC1
2 VC1
3 VC2
4 VC2
5 VC3
6 VC3
7 GND
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
Typical Performance
INSERTION LOSS vs FREQUENCY NOMINAL ATTENUATION (dB) 3.0 +85C LOSS (dB) 2.0 +25C 1.5 16 dB ATTEN 1 0.5 0 -0.5 8 dB ATTEN -1 -1.5 0 0.5 1.0 FREQUENCY (GHz) 1.5 2.0 0 0.5 1.0 FREQUENCY (GHz) 1.5 2.0 28 dB ATTEN ATTENUATION ACCURACY vs FREQUENCY 4 dB ATTEN
1.0 -40C 0
VSWR vs FREQUENCY 2.0 1.8 4 dB ATTEN VSWR 1.6 1.4 1.2 1 0 0.5 1.0 FREQUENCY (GHz) 1.5 2.0 INSERTION LOSS 8 dB ATTEN
0 -2 -4 -6 -8 -10 -12 -14 -16 -18 -20 -22 -24 -26 -28 -30 -32
ATTENUATION vs FREQUENCY
16 dB ATTEN LOSS (dB)
0
0.5
1.5 1.0 FREQUENCY (GHz)
2.0
Specifications Subject to Change Without Notice.
V2.0 s
M/A-COM, Inc.
s
1011 Pawtucket Boulevard, Lowell, MA 01853 USA
Telephone: 800-366-2266

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