GaAs IC 2 Bit Digital Attenuator
With Driver 16 dB LSB DC–2 GHz
AK002D2-00
Features
s
Integral Driver ±5 V Supply Voltages
s
Attenuation in 16 dB Steps to 48 dB
s
100% On-Wafer DC Testing
s
Capable of Meeting MIL-STD-883
Requirements
8
1.150
1.055
0.989
0.888
0.835
0.686
Chip Outline
0.088
0.258
0.914
1.074
1.611
1.833
1.055
1.005
0.959
0.912
0.703
Description
The AK002D2-00 is an IC FET digital attenuator
consisting of two monolithic attenuators with an LSB of
16 dB and a total attenuation of 48 dB with all attenuators
connected. This chip has integral drivers for each bit
requiring less than 3 mA per bit. DC supply voltages of
±5 V are required. The attenuator is designed for both
commercial and high reliability applications. These chips
are visually inspected per MIL-STD-883 MT 2010.
0.295
0.097
0.000
0.000
0.093
0.254
0.589
0.805
1.136
1.346
1.674
1.930
0.289
Electrical Specifications at 25°C
Parameter
1
Insertion Loss
2
Frequency
7
DC–0.5 GHz
DC–1.0 GHz
DC–2.0 GHz
DC–1.0 GHz
DC–2.0 GHz
VSWR (I/O)
DC–1.0 GHz
DC–2.0 GHz
16
±6%
±6%
32
±6%
±8%
Min.
Typ.
1.7
1.9
2.2
48
±8%
±10%
1.4:1
1.6:1
Max.
1.8
2.1
2.5
Bits
Max.
Max.
1.5:1
1.7:1
Unit
dB
dB
dB
dB
dB
Attenuation Accuracy
3
Operating Characteristics at 25°C
Parameter
Switching Characteristics
Condition
Rise, Fall (10/90% or 90/10% RF)
On, Off (50% CTL to 90/10% RF)
Video Feedthru
4
0.50–2 GHz
0.05 GHz
For Two-tone Input Power 13 dBm
V
Low
V
High
+5 V @ 3 mA Typ.
-5 V @ 8 mA Typ.
0.50–2 GHz
0.05 GHz
0.0
4.0
+4.75
-4.75
Frequency
Min.
Typ.
10
20
30
20
12
37
26
0.5
5.5
Max.
Unit
ns
ns
mV
dBm
dBm
dBm
dBm
V
V
V
V
Input Power for 1 dB Compression
Intermodulation Intercept Point (IP3)
Control Voltages
Supply Voltages
5,6
1. All measurements made in a 50
Ω
system, unless otherwise specified.
2. Insertion loss changes by 0.003 dB/°C.
3. Attenuation referenced to insertion loss.
4. Video feedthru measured with 1 ns risetime pulse and 500 MHz bandwidth.
5. Supply voltages and ground must be connected before control voltage is
applied. Use of toggle switches or other similar components may produce
voltage spikes which can cause irreversible damage to the device.
+5.0
+5.25
-5.0
-5.25
6. Current drain @ 85°C = 5 mA Typ. @ +5 V, 11
m
A Typ. @ -5 V.
7. DC = 300 kHz.
8. See Quality/Reliability section.
Alpha Industries, Inc.
[781] 935-5150
•
Fax
[617] 824-4579
•
Email
sales@alphaind.com
•
www.alphaind.com
Specifications subject to change without notice. 3/99A
1
GaAs IC 2 Bit Digital Attenuator With Driver 16 dB LSB DC–2 GHz
AK002D2-00
Typical Performance Data
5
4
3
2
1
+85˚C
-40˚C
50
45
~
~
35
~
~
Insertion Loss (dB)
Attenuation (dB)
2
30
25
20
15
DC
1
DC
1
2
Frequency (GHz)
Frequency (GHz)
Insertion Loss vs. Frequency
Attenuation 16, 32 and 48 dB
States vs. Frequency
2.5
2.2
1.9
Absolute Maximum Ratings
Characteristic
RF Input Power (RF In)
Supply Voltage (V
S
)
Value
0.8 W > 500 MHz
0.2 W @ 50 MHz
+6 V, -6 V
-0.2 V, +6 V
-40°C to +90°C
-65°C to +150°C
30°C/W
1.6
1.3
1.0
DC
1
2
Control Voltage (V
C
)
Operating Temperature (T
OP
)
Storage Temperature (T
ST
)
Thermal Resistance (Θ
JC
)
Frequency (GHz)
VSWR vs. Frequency (All States)
Chip Layout
+5 V (ALT.) C
2
GND GND
C
1
+5 V
Truth Table
C
1
16 dB
0
1
0
1
C
2
32 dB
0
0
1
1
Attenuation
J
1
–J
2
Reference I.L.
16 dB
32 dB
48 dB
GND
GND GND
GND GND GND
-5 V
(ALT.)
GND
RF
-5 V
GND
RF
2
Alpha Industries, Inc.
[781] 935-5150
•
Fax
[617] 824-4579
•
Email
sales@alphaind.com
•
www.alphaind.com
Specifications subject to change without notice. 3/99A
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