MACOM AT-264, AT-264TR 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
•
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
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 pass ivation
for increased performance and reliability.
TSSOP-16
1. Dimensions are in inches/mm.
1
PN 16
25
24
6,0
6,2
PN 1
.025
0,6
20
19
5,1
4,0
.03
03
0,9
0,8
.17
.16
4,0
4,2
Ordering Information
Part Number Package
AT-264 TSSOP 16-Lead Plastic
AT-264TR Tape and Reel
1. Refer to Application Note M513 for reel size information.
1
Electrical Specifications: TA = +25°C
1
Parameter Test Conditions Units Min. Typ. Max.
Reference Insertion Loss 0.5 - 1.0 GHz dB 1.6 1.8
0.5 - 2.0 GHz dB 1.8 2.0
Attenuation Accuracy 0.5 - 1.0 GHz ±(0.15 dB + 5% of Attenuation setting in dB) dB
0.5 - 2.0 GHz ±(0.3 dB + 5% of Attenuation setting in dB) dB
VSWR 1.0 - 1.5 GHz 1.5:1
0.5 - 2.0 GHz 1.9:1
,
T
T
rise
fall
,
T
T
on
off
ransients
T
1 dB Compression Input Power 0.5 GHz
IP
2
IP
3
1. All measurements at 900 MHz in a 50Ω system unless otherwise specified. Loss varies at 0.003 dB/°C.
2. For two-tone Input Power up to +5 dBm.
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
10% to 90% RF, 90% to 10% RF
50% Control to 90% RF, 50% Control to 10% RF
in Band
Input Power 0.9 GHz
Measured Relative to 0.5 GHz
Input Power
Measured Relative to 0.5 GHz
Input Power
AMP and Connecting at a Higher Level are trademarks.
Specifications subject to change without notice.
2
0.5 - 2.0 GHz
2
0.5 - 2.0 GHz
S
µ
S
µ
mV
dBm
dBm
dBm
dBm
dBm
dBm
3
3
75
25
25
65
71
43
47
V3.00
Digital Attenuator, 4 Bit, Single Control, 30 dB, 0.5 - 2.0 GHz AT-264
Absolute Maximum Ratings
1
Parameter Absolute Maximum
Input Power
50 MHz
500 - 2000 MHz
+27 dBm
+34 dBm
Control Voltage +8.5V, -0.5V
Operating Temperature -40°C to +85°C
Storage Temperature -65°C to +150°C
1. Exceeding any one or a combination of these limits may cause
permanent damage.
Truth Table
VC1 VC2 VC3 VC4 Attenuation (dB)
1 1 1 1 Reference I.L.
11 1 0 2
11 0 1 4
10 1 1 8
01 1 1 16
00 0 0 30
Logic 0=0±0.2V
Logic 1 = +5v @ 30 µA max. current total.
Functional Schematic
Vs
RF1 GND GND GND GND GND
PIN 16
16 8 4 2
PIN 1
GND GND VC1 VC2 VC3 VC4 GND GND
1, 2
GND RF2
1. Blocking Caps are required on all RF ports, 39 pF used for data
measurements.
2. Vs = +5+
0.2Vdc can be applied at RF1 or RF2 using a 10K or
greater pull-up resistor.
Typical Performance Curves
Insertion Loss vs. Frequency
2.5
2
1.5
1
0.5
INSERTION LOSS (dB)
0
0.5 1 1.5 2 2.5 3
FREQUENCY (GHz)
Attenuation vs. Frequency
0
-2
-4
-6
-8
-10
-12
-14
-16
-18
-20
-22
-24
ATTENUATION (dB)
-26
-28
-30
-32
0.5 1 1.5 2 2.5 3
FREQUENCY (GHz)
VSWR vs. Frequency
2.8
2.6
2.4
2.2
2
1.8
VSWR
1.6
1.4
1.2
1
0.5 1 1.5 2 2.5 3
Attenuation Accuracy vs. Frequency
1.5
1
0.5
0
-0.5
ATTENUATION (dB)
-1
DEVIATION FROM NOMINAL
-1.5
0.5 1 1.5 2 2.5 3
30 dB ATTEN
FREQUENCY (GHz)
16, 30 dB ATTEN
FREQUENCY (GHz)
16 dB ATTEN
8 dB ATTEN
2 dB ATTEN
IL
2 dB ATTEN
4 dB
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.
V3.00
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