Digital Attenuator, 31.0 dB, 5-Bit,
TTL Driver, DC-6.0 GHz
AT90
-
0001
CSP-1
V 5.00
Features
n
Attenuation: 1.0 dB Steps to 31 dB
n
High Accuracy to 6 GHz
n
Small Footprint, JEDEC 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 AT90-0001 is a GaAs FET 5-bit digital at-
tenuator with an integral TTL driver. Step size is 1.0 dB
providing 31 dB total attenuation range. This device is in a
32 lead FQFP-N surface mount package. Due to superior
grounding techniques this digital attenuator offers superior
performance to 6 GHz. The AT90-0001 is ideally suited for
use where accuracy, fast speed, very low power consump-
tion and low costs are required.
Electrical Specifications
T
A
= +25C
Parameter
Test Conditions
Frequency
Units
Min
Typical
Max
Insertion Loss
--
DC - 2.0 GHz
DC - 4.0 GHz
DC - 6.0 GHz
dB
dB
dB
--
--
--
2.5
3.3
5.0
3.1
3.8
5.8
Attenuation
Accuracy
1 to 24 dB Bits
25 to 31 dB Bits
DC - 6.0 GHz
DC - 6.0 GHz
dB
dB
--
--
--
--
(0.3 +4% of atten.)
(0.3 +5% of atten.)
VSWR
Full Range
DC - 2.0 GHz
DC - 6.0 GHz
Ratio
Ratio
--
--
1.4:1
1.7:1
1.7:1
2.4:1
1 dB Compression
--
--
50 MHz
0.5 - 6.0 GHz
dBm
dBm
--
--
+22
+28
--
--
Input IP2
Two tone inputs to +5 dBm
50 MHz
0.5 - 6.0 GHz
dBm
dBm
--
--
+43
+60
--
--
Input IP3
Two-tone inputs up to +5 dBm
50 MHz
0.5-6.0 GHz
dB
dB
--
--
+37
+48
--
--
Vcc
-Vee
--
--
--
--
V
V
4.75
-8.0
5.0
-5.0
5.25
-4.75
Switching Speed
50% Cntl to 90%/10% RF
10% to 90% or 90% to 10%
--
--
nS
nS
--
--
25
15
--
--
Logic "0"
Logic "1"
Sink Current is 20 A Max.
Source Current is 20 A Max.
--
--
V
V
0.0
2.0
-
-
0.8
5.0
Icc
Vcc min to max, Logic "0" or 1"
--
mA
--
0.2
6
-Iee
Vee min to max, Logic "0" or 1"
--
mA
--
-0.2
-1
Digital Attenuator, 31.0 dB, 5-Bit, TTL Driver, DC - 6.0 GHz
AT90-0001
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 5.00
2
Absolute Maximum Ratings
1
Parameter
Absolute Maximum
Max. Input Power
0.05 GHz
0.5 - 6.0 GHz
+27 dBm
+34 dBm
+Vcc
+5.5V
-Vee
-8.5V
Logic Voltages
2
-0.5 to Vcc + 0.5V
Operating Temperature
-40C to +85C
Storage Temperature
-65C to +125C
1. Operation of this device above any one of these parameters
may cause permanent damange.
2. Standard CMOS TTL interface, latch-up will occur if logic
signal is applied prior to power supply.
Pin Configuration
Pin #
Function
Pin #
Function
1
NC
17
NC
2
C16
18
NC
3
C8
19
NC
4
C4
20
NC
5
C2
21
NC
6
C1
22
NC
7
GND
23
NC
8
NC
24
NC
9
NC
25
NC
10
NC
26
GND
11
GND
27
RF2
12
RF1
28
GND
13
GND
29
NC
14
NC
30
-Vee
15
NC
31
NC
16
NC
32
+Vcc
NC = No Connection
Truth Table
C16
C8
C4
C2
C1
Attenuation
0
0
0
0
0
Loss, Reference
0
0
0
0
1
1 dB
0
0
0
1
0
2 dB
0
0
1
0
0
4 dB
0
1
0
0
0
8 dB
1
0
0
0
0
16 dB
1
1
1
1
1
31 dB
0 = TTL Low; 1 = TTL High
Recommended PCB Layout
3
3. Application Note C2083 is available on line at
www.macom.com
Digital Attenuator, 31.0 dB, 5-Bit, TTL Driver, DC - 6.0 GHz
AT90-0001
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 5.00
Typical Performance Curves
VSWR vs. Frequency
Insertion Loss vs. Frequency
Accuracy (dB) vs. Frequency
3
Ordering Information
Part Number
Package
AT90-0001
Bulk Packaging
AT90-0001TR
Tape and Reel (1K Reel)
AT90-0001-TB
Units Mounted on Test Board
Accuracy (dB) vs. Frequency
0
1
2
3
4
5
6
0.0
1.0
2.0
3.0
4.0
5.0
6.0
Frequency (GHz)
Insertion Loss (dB)
+85C
- 40C
+25C
1.0
1.2
1.4
1.6
1.8
2.0
2.2
2.4
0.0
1.0
2.0
3.0
4.0
5.0
6.0
Frequency (GHz)
VSWR
RF1 - IL
RF1 - 31 dB
RF2 - 31 dB
RF2 - IL
RF1 - IL
-0.50
-0.25
0.00
0.25
0.50
0.0
1.0
2.0
3.0
4.0
5.0
6.0
Frequency (GHz)
Accuracy (dB)
1 dB
4 dB
1 dB
2 dB
-1.50
-0.75
0.00
0.75
1.50
0.0
1.0
2.0
3.0
4.0
5.0
6.0
Frequency (GHz)
Accuracy (dB)
16 dB
31 dB
8 dB
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