Digital Attenuator, 15.5 dB, 5-Bit,
TTL Driver, DC - 2.0 GHz
AT65
-
0283
SOW-16
V 6.00
Electrical Specifications: T
A
= 25C
Features
n
Attenuation: 0.5 dB Steps to 15.5 dB
n
Low DC Power Consumption
n
Plastic SOIC, Wide Body, SMT Package
n
Integral TTL Driver
n
50 ohm Impedance
n
Test Boards are Available
n
Tape and Reel Packaging Available
Description
M/A-COM's AT65-0283 is a GaAs FET 5-bit digital
attenuator with integral TTL driver. Step size is 0.5 dB
providing a 15.5 dB total attenuation range. This device is
in a SOIC-16 plastic surface mount package. The
AT65-0283 is ideally suited for use where accuracy, fast
speed, very low power consumption and low costs are
required.
Package outline conforms to JEDEC standard MS-013AA.
Parameter
Test Conditions
Frequency
Units
Min
Typical
Max
Insertion Loss
--
DC - 1.0 GHz
DC - 2.0 GHz
dB
dB
--
--
2.0
2.3
2.5
2.7
Attenuation Accuracy
Any Bit
Any Combination of Bits
DC - 2.0 GHz
DC -2.0 GHz
dB
dB
--
--
--
--
(.3 +4% of atten)
(.3 +6% of atten)
VSWR
Full Range
DC - 2.0 GHz
Ratio
--
1.5:1
1.8:1
Switching Speed
1
50% Cntl to 90%/10% RF
10% to 90% or 90% to 10%
--
--
nS
nS
--
--
75
20
150
50
1 dB Compression
--
--
50 MHz
0.5 - 2.0 GHz
dBm
dBm
--
--
+21
+29
--
--
Input IP
3
Two-tone inputs up to +5 dBm
50 MHz
0.5-2.0 GHz
dB
dB
--
--
+35
+48
--
--
Vcc
-Vee
--
--
--
--
V
V
4.75
-8.0
5.0
-5.0
5.25
-4.75
Logic "0"
Sink Current is 20 A max.
--
V
0.0
--
0.8
Logic "1"
Source Current is 20 A max.
--
V
2.0
--
5.0
Icc
Vcc min to max, Logic "0" or "1"
--
mA
--
0.2
6
-Iee
-Iee min to max, Logic "0" or "1"
--
mA
--
-0.2
-1
1. Decoupling capacitors (.01 F) are required on power supply lines.
Digital Attenuator, 15.5 dB, 5-Bit, TTL Driver, DC - 2.0 GHz
AT65-0283
Specifications subject to change without notice.
n
North America: Tel. (800) 366-2266
n
Asia/Pacific: Tel.+81-44-844-8296, Fax +81-44-844-8298
n
Europe: Tel. +44 (1344) 869 595, Fax+44 (1344) 300 020
Visit www.macom.com for additional data sheets and product information.
V 6.00
2
Pin Configuration
Pin #
Function
Pin #
Function
1
RF
9
C8
2
GND
10
Vcc
3
GND
11
Vee
4
GND
12
C4
5
GND
13
C2
6
GND
14
C1
7
GND
15
C0.5
8
RF
16
GND
Absolute Maximum Ratings
2
Parameter
Absolute Maximum
Max. Input Power
0.05 GHz
0.5 - 2.0 GHz
+27 dBm
+34 dBm
+Vcc
+5.5V
-Vee
-8.5V
Logic Voltages
3
-0.5 to Vcc + 0.5V
Operating Temperature
-40C to +85C
Storage Temperature
-65C to +125C
2. Operation of this device above any one of these
parameters may cause permanent damange.
3. Standard CMOS TTL interface, latch-up will occur if logic
signal is applied prior to power supply.
Truth Table
C8
C4
C2
C1
C0.5
Attenuation
0
0
0
0
0
Loss, Reference
0
0
0
0
1
0.5 dB
0
0
0
1
0
1.0 dB
0
0
1
0
0
2.0 dB
0
1
0
0
0
4.0 dB
1
0
0
0
0
8.0 dB
1
1
1
1
1
15.5 dB
0 = TTL Low; 1 = TTL High
Typical Performance Curves
Attenuation Accuracy
Attenuation Accuracy
Insertion Loss
1.00
1.50
2.00
2.50
0
500
1000
1500
2000
Frequency (MHz)
Insertion Loss (dB)
-0.2
-0.1
0.0
0.1
0.2
0.3
0.4
0
500
1000
1500
2000
Frequency (MHz)
Deviation (dB)
4 dB Bit
0.5, 1, 2 dB Bits
-0.2
0.0
0.2
0.4
0.6
0.8
1.0
0
500
1000
1500
2000
Frequency (MHz)
Deviation (dB)
Max. Attenuation
8 dB
Digital Attenuator, 15.5 dB, 5-Bit, TTL Driver, DC - 2.0 GHz
AT65-0283
Specifications subject to change without notice.
n
North America: Tel. (800) 366-2266
n
Asia/Pacific: Tel.+81-44-844-8296, Fax +81-44-844-8298
n
Europe: Tel. +44 (1344) 869 595, Fax+44 (1344) 300 020
Visit www.macom.com for additional data sheets and product information.
V 6.00
Typical Performance Curves
VSWR RFout, 0.5, 1, 2 & 4 dB Bits
VSWR @ Insertion Loss
VSWR RFin, 0.5, 1, 2, 4, 8 dB Bits
and Max Attenuation
3
VSWR RFout, 8 dB Bit &
Max Attenuation
Ordering Information
Part Number
Package
AT65-0283
Bulk Packaging
AT65-0283TR
Tape and Reel (1K Reel)
AT65-0283-TB
Units Mounted on Test Board
1
1.1
1.2
1.3
1.4
1.5
0
500
1000
1500
2000
Frequency (MHz)
VSWR
1
1.1
1.2
1.3
1.4
1.5
0
500
1000
1500
2000
Frequency (MHz)
VSWR
1
1.1
1.2
1.3
1.4
1.5
0
500
1000
1500
2000
Frequency (MHz)
VSWR
1
1.2
1.4
1.6
0
500
1000
1500
2000
Frequency (MHz)
VSWR
RFin
RFout
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