MA-COM AT90-1263-TB

AT90-1263
Digital Attenuator, 31 dB, 5-Bit,
TTL Driver, DC-4.0 GHz
CSP-1
Features
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V 6.00
Attenuation: 1.0dB Steps to 31dB
Single Positive Supply
Contains internal DC to DC converter
Low DC Power Consumption
Small Footprint, JEDEC Package
Integral TTL Driver
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.
Electrical Specifications TA = +25°C
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
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)
Any Combination of Bits 1 to
31 dB
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 IP3
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 µA max.
—
V
0.0
—
0.8
Logic “1”
Source Current is 20 µA max.
—
V
2.0
—
5.0
Icc
Vcc min to max,
Logic “0” or “1”
—
mA
—
6
10
Digital Attenuator, 31 dB, 5-Bit, TTL Driver, DC - 4.0 GHz
AT90-1263
V 6.00
Recommended PCB Layout 7
Pin Configuration
1.
2.
3.
4.
5.
6.
Pin #
Function
Pin #
Function
1
GND
17
NC
2
C16
18
NC
3
C8
19
+Vcc2
4
C4
20
NC
5
C2
21
Cp4
6
C1
22
NC
7
8
9
GND
NC
NC
23
24
25
Cp4
NC
-Vee3
10
NC1
26
GND
11
GND
27
RF2
12
RF1
28
GND
13
14
GND
NC
29
30
NC1
-Vee3,5
15
NC
31
NC
16
NC
32
+Vcc2,6
Pins 10 & 29 must be isolated
Pin 19 must be connected to Pin 32
Pin 25 must be connected to Pin 30
.01µF cap must be connected between Pins 21 and 23
-Vee is produced internally and requires a .1µF cap to
GND
+Vcc requires a .1µF cap to GND
Absolute Maximum Ratings 8
Parameter
Absolute Maximum
7. Application Note C2083 is available on line at
www.macom.com
Truth Table
C16
0
C8
0
C4
0
C2
0
C1
0
Attenuation
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
Max. Input Power
0.05 GHz
0.5 - 4.0 GHz
+27 dBm
+34 dBm
+Vcc
+5.5V
1
0
0
0
0
16.0 dB
-0.5 to +Vcc + 0.5V
1
1
1
1
1
31.0 dB
Logic Voltages
9
Operating Temperature
-40°C to +85°C
Storage Temperature
-65°C to +125°C
0 = TTL Low; 1 = TTL High
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.
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.
2
Digital Attenuator, 31 dB, 5-Bit, TTL Driver, DC - 4.0 GHz
AT90-1263
V 6.00
Typical Performance Curves
Insertion Loss
VSWR @ Insertion Loss
Input
3.0
2.00
2.0
1.00
1.0
0
1000
2000
3000
0
4000
1000
Attenuation Error, 1 dB Bit
3000
4000
Attenuation Error, 2 dB Bit
0.3
0.3
0.2
0.2
Error (dB)
Error (dB)
2000
Frequency (MHz)
Frequency (MHz)
0.1
0
0.1
0
-0.1
-0.1
0
1000
2000
3000
4000
0
1000
Frequency (MHz)
2000
3000
4000
Frequency (MHz)
Attenuation Error, 8 dB Bit
Attenuation Error, 4 dB Bit
0.7
0.7
0.5
0.5
Error (dB)
Error (dB)
Output
3.00
VSWR
Loss (dB)
4.0
0.3
0.3
0.1
0.1
-0.1
-0.1
0
1000
2000
3000
4000
Frequency (MHz)
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.
0
1000
2000
3000
4000
Frequency (MHz)
3
Digital Attenuator, 31 dB, 5-Bit, TTL Driver, DC - 4.0 GHz
AT90-1263
V 6.00
Typical Performance Curves
Attenuation Error, Max. Attenuation
1.5
1.5
0.5
0.5
Error (dB)
Error (dB)
Attenuation Error, 16 dB Bit
-0.5
-0.5
-1.5
-1.5
0
1000
2000
3000
0
4000
1000
Frequency (MHz)
VSWR, 1 dB Bit
Output
2000
3000
4000
3000
4000
3000
4000
Frequency (MHz)
VSWR, 2 dB Bit
Input
Input
1.8
Output
1.6
1.6
VSWR
VSWR
1.4
1.4
1.2
1.2
1.0
1.0
0
1000
2000
3000
0
4000
1000
2000
Frequency (MHz)
Frequency (MHz)
VSWR, 8 dB Bit
VSWR, 4 dB Bit
Input
Input
Output
1.6
1.4
1.4
Output
VSWR
VSWR
1.6
1.2
1.2
1.0
1.0
0
1000
2000
3000
4000
Frequency (MHz)
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.
0
1000
2000
Frequency (MHz)
4
Digital Attenuator, 31 dB, 5-Bit, TTL Driver, DC - 4.0 GHz
AT90-1263
V 6.00
Typical Performance Curves
VSWR, Maximum Attenuation
VSWR, 16 dB Bit
Input
Input
Output
1.6
1.4
1.4
VSWR
VSWR
1.6
Output
1.2
1.2
1.0
1.0
0
1000
2000
3000
4000
Frequency (MHz)
0
1000
2000
3000
4000
Frequency (MHz)
Ordering Information
Part Number
Package
AT90-1263
Bulk Packaging
AT90-1263TR
Tape and Reel (1K Reel)
AT90-1263-TB
Units Mounted on Test Board
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.
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