MACOM AT90-1283-TB Digital attenuator, 15.5 db, 5-bit, ttl driver, dc-3.5 ghz Datasheet

AT90-1283
Digital Attenuator, 15.5 dB, 5-Bit,
TTL Driver, DC-3.5 GHz
CSP-1
Features
n
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V 4.00
Attenuation: 0.5 dB Steps to 15.5 dB
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 AT90-1283 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 an FQFP-N plastic surface mount package. The AT901283 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 - 3.5 GHz
dB
—
2.8
3.2
Attenuation
Accuracy
Individual Bits 0.5-1-4-8 dB
Individual Bit 2 dB
Any Combination of Bits
1 to 15.5 dB
DC - 3.5 GHz
DC - 3.5 GHz
DC - 3.5 GHz
dB
dB
dB
—
—
—
—
—
—
±(.3 +5% of atten setting)
±(.4 +10% of atten setting)
±(.5 +7% of atten setting)
VSWR
Full Range
DC - 3.5 GHz
Ratio
—
1.6:1
1.8:1
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 - 3.5 GHz
dBm
dBm
—
—
+21
+29
—
—
Input IP3
Two-tone inputs up to +5 dBm
50 MHz
0.5-3.5 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, 15.5 dB, 5-Bit, TTL Driver, DC - 3.5 GHz
AT90-1283
V 4.00
Pin Configuration
Recommended PCB Layout 7
Pin #
Function
Pin #
Function
1
GND
17
NC
2
C8
18
NC
3
C4
19
+Vcc2
4
C2
20
NC
5
C1
21
Cp4
6
C0.5
22
NC
7
8
9
GND
NC
NC
23
24
25
Cp4
NC
-Vee3,5
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
1.
2.
3.
4.
5.
6.
Pins 10 & 29 must be isolated
Pin 19 must be connected to Pin 32.
Pin 25 must be connected to Pin 30.
.01 µF cap must be between pins 21 & 23.
-Vee produced internally and requires a .1 µF cap to GND.
+Vcc requires a .1 µF cap to GND.
7. Application Note C2083 is available on line at
www.macom.com
Absolute Maximum Ratings 8
Truth Table
C8
0
C4
0
C2
0
C1
0
C0.5
0
Attenuation
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
Parameter
Absolute Maximum
Max. Input Power
0.05 GHz
0.5 - 3.5 GHz
+27 dBm
+34 dBm
+Vcc
+5.5V
Logic Voltages
9
-0.5 to +Vcc + 0.5V
0
1
0
0
0
4.0 dB
1
0
0
0
0
8.0 dB
Operating Temperature
-40°C to +85°C
1
1
1
1
1
15.5 dB
Storage Temperature
-65°C to +125°C
0 = TTL Low; 1 = TTL High
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.
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.
2
Digital Attenuator, 15.5 dB, 5-Bit, TTL Driver, DC - 3.5 GHz
AT90-1283
V 4.00
Typical Performance Curves
Insertion Loss
VSWR @ Insertion Loss
Input
3.0
VSWR Ratio
2.5
Loss (dB)
Output
1.75
2.0
1.50
1.25
1.5
1.00
1.0
0
500
1000
1500
2000
2500
3000
0
3500
500
1000
Frequency (MHz)
2000
2500
3000
3500
3000
3500
3000
3500
Frequency (MHz)
Attenuation Error, 0.5 dB Bit
Attenuation Error, 1 dB Bit
1.0
1.0
0.5
0.5
Error (dB)
Error (dB)
1500
0.0
0.0
-0.5
-0.5
-1.0
-1.0
0
500
1000
1500
2000
2500
3000
0
3500
500
1000
1500
2000
2500
Frequency (MHz)
Frequency (MHz)
Attenuation Error, 4 dB Bit
Attenuation Error, 2 dB Bit
1.0
1.0
Error (dB)
Error (dB)
0.5
0.0
0.5
0.0
-0.5
-0.5
-1.0
0
500
1000
1500
2000
2500
3000
3500
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
500
1000
1500
2000
2500
Frequency (MHz)
3
Digital Attenuator, 15.5 dB, 5-Bit, TTL Driver, DC - 3.5 GHz
AT90-1283
V 4.00
Typical Performance Curves
Attenuation Error, Max. Attenuation
Attenuation Error, 8 dB Bit
1.0
3.0
Error (dB)
2.0
Error (dB)
0.5
0.0
1.0
0.0
-1.0
-0.5
0
500
1000
1500
2000
2500
3000
0
3500
500
1000
Frequency (MHz)
VSWR, 0.5 dB Bit
2500
3000
3500
Input
Output
1.6
VSWR Ratio
1.6
VSWR Ratio
2000
VSWR, 1 dB Bit
Output
Input
1.4
1.2
1.4
1.2
1.0
1.0
0
500
1000
1500
2000
2500
3000
0
3500
500
1000
1500
2000
2500
3000
3500
3000
3500
Frequency (MHz)
Frequency (MHz)
VSWR, 4 dB Bit
VSWR, 2 dB Bit
Input
Input
Output
Output
1.6
1.8
1.6
VSWR Ratio
VSWR Ratio
1500
Frequency (MHz)
1.4
1.4
1.2
1.2
1.0
0
500
1000
1500
2000
2500
3000
3500
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.
1.0
0
500
1000
1500
2000
2500
Frequency (MHz)
4
Digital Attenuator, 15.5 dB, 5-Bit, TTL Driver, DC - 3.5 GHz
AT90-1283
V 4.00
Typical Performance Curves
VSWR, Maximum Attenuation
VSWR, 8 dB Bit
Input
Output
Input
VSWR Ratio
VSWR Ratio
Output
1.8
1.6
1.4
1.2
1.6
1.4
1.2
1.0
1.0
0
500
1000
1500
2000
2500
3000
3500
Frequency (MHz)
0
500
1000
1500
2000
2500
3000
3500
Frequency (MHz)
Ordering Information
Part Number
Package
AT90-1283
Bulk Packaging
AT90-1283TR
Tape and Reel (1K Reel)
AT90-1283-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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