Digital Attenuator, 31 dB, 5-Bit,
TTL Driver, DC-4.0 GHz
AT90
-
1263
CSP-1
V 6.00
Electrical Specifications
T
A
= +25C
Parameter
Test Conditions
Frequency
Units
Min
Typical
Max
Insertion Loss
--
DC - 4.0 GHz
dB
--
3.5
3.8
Attenuation
Accuracy
Individual Bits 1-2-4-8-16 dB
Any Combination of Bits 1 to
31 dB
DC - 3.0 GHz
DC - 4.0 GHz
DC - 4.0 GHz
dB
dB
dB
--
--
--
--
--
--
(.3 +5% of atten setting)
(.4 +6% of atten setting)
(.5 +7% of atten setting)
VSWR
Full Range
DC - 4.0 GHz
Ratio
--
2.0:1
2.2:1
Switching Speed
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 - 4.0 GHz
dBm
dBm
--
--
+21
+29
--
--
Input IP
3
Two-tone inputs up to +5 dBm
50 MHz
0.5-4.0 GHz
dB
dB
--
--
+35
+48
--
--
+Vcc
--
--
V
4.75
5.0
5.25
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
--
6
10
Features
n
Attenuation: 1.0dB Steps to 31dB
n
Single Positive Supply
n
Contains internal DC to DC converter
n
Low DC Power Consumption
n
Small Footprint, JEDEC Package
n
Integral TTL Driver
n
50 ohm Impedance
Description
M/A-COM's AT90-1263 is a GaAs FET 5-bit digital
attenuator with integral TTL driver. Step size is 1.0 dB
providing 31dB total attenuation range. This device is in an
FQFP-N plastic surface mount package. The AT90-1263 is
ideally suited for use where accuracy, fast speed, very low
power consumption and low costs are required.
Digital Attenuator, 31 dB, 5-Bit, TTL Driver, DC - 4.0 GHz
AT90-1263
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
Absolute Maximum Ratings
8
Parameter
Absolute Maximum
Max. Input Power
0.05 GHz
0.5 - 4.0 GHz
+27 dBm
+34 dBm
+Vcc
+5.5V
Logic Voltages
9
-0.5 to +Vcc + 0.5V
Operating Temperature
-40C to +85C
Storage Temperature
-65C to +125C
8. Operation of this device above any one of these parameters
may cause permanent damange.
9. Standard CMOS TTL interface, latch-up will occur if logic
signal is applied prior to power supply.
Pin Configuration
Pin #
Function
Pin #
Function
1
GND
17
NC
2
C16
18
NC
3
C8
19
+Vcc
2
4
C4
20
NC
5
C2
21
Cp
4
6
C1
22
NC
7
GND
23
Cp
4
8
NC
24
NC
9
NC
25
-Vee
3
10
NC
1
26
GND
11
GND
27
RF2
12
RF1
28
GND
13
GND
29
NC
1
14
NC
30
-Vee
3,5
15
NC
31
NC
16
NC
32
+Vcc
2,6
Truth Table
C16
C8
C4
C2
C1
Attenuation
0
0
0
0
0
Loss, Reference
0
0
0
0
1
1.0 dB
0
0
0
1
0
2.0 dB
0
0
1
0
0
4.0 dB
0
1
0
0
0
8.0 dB
1
0
0
0
0
16.0 dB
1
1
1
1
1
31.0 dB
0 = TTL Low; 1 = TTL High
Recommended PCB Layout
7
1.
Pins 10 & 29 must be isolated
2.
Pin 19 must be connected to Pin 32
3.
Pin 25 must be connected to Pin 30
4.
.01F cap must be connected between Pins 21 and 23
5.
-Vee is produced internally and requires a .1F cap to
GND
6.
+Vcc requires a .1F cap to GND
7. Application Note C2083 is available on line at
www.macom.com
Digital Attenuator, 31 dB, 5-Bit, TTL Driver, DC - 4.0 GHz
AT90-1263
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
3
Attenuation Error, 2 dB Bit
Attenuation Error, 1 dB Bit
Attenuation Error, 4 dB Bit
Attenuation Error, 8 dB Bit
-0.1
0
0.1
0.2
0.3
0
1000
2000
3000
4000
Frequency (MHz)
Error (dB)
-0.1
0
0.1
0.2
0.3
0
1000
2000
3000
4000
Frequency (MHz)
Error (dB)
-0.1
0.1
0.3
0.5
0.7
0
1000
2000
3000
4000
Frequency (MHz)
Error (dB)
-0.1
0.1
0.3
0.5
0.7
0
1000
2000
3000
4000
Frequency (MHz)
Error (dB)
Insertion Loss
VSWR @ Insertion Loss
1.0
2.0
3.0
4.0
0
1000
2000
3000
4000
Frequency (MHz)
Loss (dB)
1.00
2.00
3.00
0
1000
2000
3000
4000
Frequency (MHz)
VSWR
Input
Output
Digital Attenuator, 31 dB, 5-Bit, TTL Driver, DC - 4.0 GHz
AT90-1263
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
4
Attenuation Error, 16 dB Bit
Attenuation Error, Max. Attenuation
-1.5
-0.5
0.5
1.5
0
1000
2000
3000
4000
Frequency (MHz)
Error (dB)
-1.5
-0.5
0.5
1.5
0
1000
2000
3000
4000
Frequency (MHz)
Error (dB)
VSWR, 2 dB Bit
VSWR, 1 dB Bit
VSWR, 4 dB Bit
VSWR, 8 dB Bit
1.0
1.2
1.4
1.6
1.8
0
1000
2000
3000
4000
Frequency (MHz)
VSWR
Input
Output
1.0
1.2
1.4
1.6
0
1000
2000
3000
4000
Frequency (MHz)
VSWR
Input
Output
1.0
1.2
1.4
1.6
0
1000
2000
3000
4000
Frequency (MHz)
VSWR
Input
Output
1.0
1.2
1.4
1.6
0
1000
2000
3000
4000
Frequency (MHz)
VSWR
Input
Output
Digital Attenuator, 31 dB, 5-Bit, TTL Driver, DC - 4.0 GHz
AT90-1263
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
5
Ordering Information
Part Number
Package
AT90-1263
Bulk Packaging
AT90-1263TR
Tape and Reel (1K Reel)
AT90-1263-TB
Units Mounted on Test Board
VSWR, 16 dB Bit
VSWR, Maximum Attenuation
1.0
1.2
1.4
1.6
0
1000
2000
3000
4000
Frequency (MHz)
VSWR
Input
Output
1.0
1.2
1.4
1.6
0
1000
2000
3000
4000
Frequency (MHz)
VSWR
Input
Output
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