MACOM AT-264TR Digital attenuator, 4 bit, single control 30 db, 0.5 - 2.0 ghz Datasheet

Digital Attenuator, 4 Bit, Single Control, 30 dB, 0.5 - 2.0 GHz
AT-264
AT-264
Digital Attenuator, 4 Bit, Single Control
30 dB, 0.5 - 2.0 GHz
Features
•
•
•
•
TSSOP-16
Single Control CMOS logic for each bit
Attenuation 2 dB steps to 30 dB
Low DC Power Consumtion: 50 uW
Low Cost Plastic TSSOP-16 Package
1
PN 16
.03
03
0,9
0,8
25
24
6,0
6,2
.17
.16
4,0
4,2
PN 1
.025
0,6
Description
The M/A-COM AT-264 is a 4 bit, 2 dB step GaAs MMIC
digital attenuator in a low cost TSSOP-16 surface mount plastic
package. The AT-264 is ideally suited for use where high
accuracy, very low power consumption and low intermodulation products are required. Typical applications include radio,
cellular, wireless LANs, GPS equipment and other gain/level
control circuits.
The AT-264 is fabricated using a mature 1 micron GaAs
MESFET process. The process features full chip passivation
for increased performance and reliability.
20
19
5,1
4,0
1. Dimensions are in inches/mm.
Ordering Information
Part Number
Package
AT-264
TSSOP 16-Lead Plastic
AT-264TR
Tape and Reel
1
1. Refer to Application Note M513 for reel size information.
Electrical Specifications: TA = +25°C
Parameter
Reference Insertion Loss
Attenuation Accuracy
VSWR
Trise, Tfall
Ton, Toff
Transients
1 dB Compression
IP2
IP3
1.
2.
1
Test Conditions
0.5 - 1.0 GHz
0.5 - 2.0 GHz
0.5 - 1.0 GHz
0.5 - 2.0 GHz
1.0 - 1.5 GHz
0.5 - 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
Input Power
Measured Relative to
2
Input Power
Measured Relative to
2
Input Power
0.5 GHz
0.9 GHz
0.5 GHz
0.5 - 2.0 GHz
0.5 GHz
0.5 - 2.0 GHz
Units
Min.
Typ.
Max.
dB
1.6
1.8
dB
1.8
2.0
±(0.15 dB + 5% of Attenuation setting in dB) dB
±(0.3 dB + 5% of Attenuation setting in dB) dB
1.5:1
1.9:1
3
µS
3
µS
75
mV
dBm
25
dBm
25
dBm
65
dBm
71
dBm
43
dBm
47
All measurements at 900 MHz in a 50Ω system unless otherwise specified. Loss varies at 0.003 dB/°C.
For two-tone Input Power up to +5 dBm.
V3.00
M/A-COM Division of AMP Incorporated Q North America: Tel. (800) 366-2266, Fax (800) 618-8883 Q Asia/Pacific: Tel.+85 2 2111 8088, Fax +85 2 2111 8087
Q Europe: Tel. +44 (1344) 869 595, Fax+44 (1344) 300 020
www.macom.com
AMP and Connecting at a Higher Level are trademarks.
Specifications subject to change without notice.
Digital Attenuator, 4 Bit, Single Control, 30 dB, 0.5 - 2.0 GHz
Absolute Maximum Ratings
Parameter
1
Functional Schematic
1, 2
Absolute Maximum
Vs
Input Power
50 MHz
500 - 2000 MHz
Control Voltage
+27 dBm
+34 dBm
+8.5V, -0.5V
Operating Temperature
-40°C to +85°C
Storage Temperature
-65°C to +150°C
1.
AT-264
RF1 GND GND GND GND GND GND RF2
PIN 16
16
Exceeding any one or a combination of these limits may cause
permanent damage.
8
4
2
Truth Table
VC1
1
1
1
1
0
0
VC2
1
1
1
0
1
0
VC3
1
1
0
1
1
0
VC4
1
0
1
1
1
0
Attenuation (dB)
Reference I.L.
2
4
8
16
30
PIN 1
GND GND VC1 VC2 VC3 VC4 GND GND
1.
Blocking Caps are required on all RF ports, 39 pF used for data
measurements.
Vs = +5+0.2Vdc can be applied at RF1 or RF2 using a 10K or
greater pull-up resistor.
2.
Logic 0=0±0.2V
Logic 1 = +5v @ 30 µA max. current total.
Typical Performance Curves
Insertion Loss vs. Frequency
VSWR vs. Frequency
2 .8
2 .6
2
2 .4
16, 30 dB ATTEN
2 .2
1 .5
VSWR
INSERTION LOSS (dB)
2 .5
1
2
1 .8
2 dB ATTEN
1 .6
1 .4
0 .5
1 .2
0
IL
1
0 .5
1
1 .5
2
2 .5
3
0 .5
1
F R E Q U E N C Y (G H z )
2
2 .5
3
Attenuation Accuracy vs. Frequency
Attenuation vs. Frequency
1 .5
0
-2
-4
-6
-8
-1 0
-1 2
-1 4
-1 6
-1 8
-2 0
-2 2
-2 4
-2 6
-2 8
-3 0
-3 2
DEVIATION FROM NOMINAL
ATTENUATION (dB)
ATTENUATION (dB)
1 .5
F R E Q U E N C Y (G H z )
30 dB ATTEN
16 dB ATTEN
1
2 dB ATTEN
0 .5
0
8 dB ATTEN
-0 .5
4 dB
-1
-1 .5
0 .5
1
1 .5
2
2 .5
3
F R E Q U E N C Y (G H z )
0 .5
1
1 .5
2
2 .5
3
F R E Q U E N C Y (G H z )
V3.00
M/A-COM Division of AMP Incorporated Q North America: Tel. (800) 366-2266, Fax (800) 618-8883 Q Asia/Pacific: Tel.+85 2 2111 8088, Fax +85 2 2111 8087
Q Europe: Tel. +44 (1344) 869 595, Fax+44 (1344) 300 020
www.macom.com
AMP and Connecting at a Higher Level are trademarks.
Specifications subject to change without notice.
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