AT20-0106
Digital Attenuator
50.0 dB, 6-Bit, TTL Driver, DC-2.0 GHz
Features
Rev. V10
Functional Schematic
Attenuation: 1 dB steps to 50 dB
Temperature Stability: ± 0.18 dB from –40°C to
+85°C Typical
Low DC Power Consumption
Surface Mount Package
Integral TTL Driver
High Intercept Point
Low Cost/High Performance
50 Ohm Nominal Impedance
Lead-Free CR-13 Package
260°C Reflow Compatible
RoHS* Compliant
RF1 PIN 24
PIN 1 GND
32 dB
GND
GND
GND
GND
16 dB
C32
GND
C16
GND
8 dB
Vee (-5V to -8V)
GND
Vcc (+5V)
GND
4 dB
GND
C8
C4
GND
2 dB
C2
GND Orientation Mark
C1
Description
GND
1 dB
PIN 12 GND
M/A-COM’s AT20-0106 is a GaAs FET 6-bit digital
attenuator with a 1 dB minimum step size and 50 dB
total attenuation. This attenuator and integral TTL
driver is in a ceramic 24-lead surface mount package. The AT20-0106 is ideally suited for use where
accuracy, fast switching, low power consumption
and low intermodulation products are required. Typical applications include dynamic range
setting in precision receiver circuits and other gain/
leveling control circuits. Available with enhanced
performance as fully hermetic version. Environmentally screenable as P/N AT-106-PIN.
Pin Configuration
Pin No.
Function
Pin No.
1
GND
13
RF2
2
GND
14
GND
3
GND
15
GND
4
C32
16
GND
5
C16
17
GND
6
Vee (-5V to -8V)
18
GND
7
Vcc (+5V)
19
GND
8
C8
20
GND
9
C4
21
GND
10
C2
22
GND
11
C1
23
GND
12
GND
24
RF1
Ordering Information
Part Number
Package
AT20-0106-PIN
Bulk Packaging
AT20-0106-TR
1000 piece reel
AT20-0106-TB
Sample Test Board
RF2 PIN 13
Function
The metal bottom of the case must be connected to RF and DC
ground.
Note: Reference Application Note M513 for reel size
information.
1
* Restrictions on Hazardous Substances, European Union Directive 2002/95/EC.
M/A-COM Technology Solutions Inc. (MACOM) and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice.
Visit www.macom.com for additional data sheets and product information.
For further information and support please visit:
https://www.macom.com/support
AT20-0106
Digital Attenuator
50.0 dB, 6-Bit, TTL Driver, DC-2.0 GHz
Rev. V10
Electrical Specifications: TA = 25°C1
Parameter
Test Conditions
Frequency
Units
Min
Typ
Max
Reference Insertion Loss
—
DC - 0.5 GHz
DC - 1.0 GHz
DC - 2.0 GHz
dB
dB
dB
—
—
—
3.5
3.9
4.2
3.8
4.2
4.6
Attenuation Accuracy 2
Any Single Bit
Any Combination of Bits
(For attenuation to 26 dB)
Any Combination of Bits
(For attenuation 27 to 50 dB)
DC - 2.0 GHz
DC - 2.0 GHz
dB
dB
± (0.3 +4% of atten. setting)
± (0.4 +4% of atten. setting)
DC - 1.5 GHz
dB
± (0.5 +5% of atten. setting)
VSWR
—
0.05 - 0.10 GHz
0.101 - 2.0 GHz
Ratio
Ratio
—
—
—
—
2.0:1
1.8:1
Trise, Tfall
10% to 90%
—
ns
—
—
50
Ton, Toff
50% Control to 90/10% RF
—
ns
—
—
150
Transients
In-Band (peak-peak)
—
mV
—
50
—
1 dB Compression
Input Power
Input Power
0.05 GHz
0.5 - 2.0 GHz
dBm
dBm
—
—
+20
+28
—
—
Input IP3
For two-tone Input Power
Up to +5 dBm
0.05 GHz
0.5 - 2.0 GHz
dBm
dBm
—
—
+34
+46
—
—
Input IP2
For two-tone Input Power
Up to +5 dBm
0.05 GHz
0.5 - 2.0 GHz
dBm
dBm
—
—
+45
+79
—
—
Vcc
—
—
V
4.5
5.0
5.5
Vee
—
—
V
-8.0
—
-5.0
Icc
Vcc = 4.5 to 5.5V
Vctl = 0 to 0.8V, or Vcc –
2.1V to Vcc
—
mA
—
—
6.0
Iee
Vee = -5.0 to -8.0V
—
mA
—
—
1.0
1. All specifications apply when operated with bias voltages of +5V for Vcc and –5.0V for Vee.
2. This attenuator is guaranteed monotonic.
2
M/A-COM Technology Solutions Inc. (MACOM) and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice.
Visit www.macom.com for additional data sheets and product information.
For further information and support please visit:
https://www.macom.com/support
AT20-0106
Digital Attenuator
50.0 dB, 6-Bit, TTL Driver, DC-2.0 GHz
Rev. V10
Recommended PCB Configuration
Absolute Maximum Ratings 3,4
Parameter
Absolute Maximum
Max Input Power
0.05 GHz
0.5 - 2.0 GHz
+27 dBm
+34 dBm
VCC
-0.5V ≤ VCC ≤ +7.0V
VEE
-8.5V ≤ VEE ≤ +0.5V
VCC - VEE
-0.5V ≤ VCC - VEE ≤ 14.5V
5
3.
4.
5.
Vin
-0.5V ≤ Vin ≤ VCC + 0.5V
Operating Temperature
-40°C to +125°C
Storage Temperature
-65°C to +150°C
Exceeding any one or combination of these limits may cause
permanent damage to this device.
M/A-COM does not recommend sustained operation near
these survivability limits.
Standard CMOS TTL interface, latch-up will occur if logic
signal is applied prior to power supply.
Truth Table (Digital Attenuator)
Control Inputs
Handling Procedures
C6
C5
C4
C3
C2
C1
Attenuation
Please observe the following precautions to avoid
damage:
0
0
0
0
0
0
Reference
0
0
0
0
0
1
1 dB
Static Sensitivity
0
0
0
0
1
0
2 dB
Gallium Arsenide Integrated Circuits are sensitive
to electrostatic discharge (ESD) and can be
damaged by static electricity. Proper ESD control
techniques should be used when handling these
devices.
0
0
0
1
0
0
4 dB
0
0
1
0
0
0
8 dB
0
1
0
0
0
0
16 dB
1
0
0
0
0
0
32 dB
1
1
1
1
1
1
63 dB
Typical Performance Curves
0 = TTL Low; 1 = TTL High
Insertion Loss vs. Frequency
+2 5 °C
Attenuation Accuracy vs. Frequency
- 5 5 °C
Insertion Loss (dB)
5
4
3
2
1
0
0.0
3
0.5
1.0
Fre que ncy (GHz )
1.5
2.0
Deviation from Nominal Atten (dB)
+8 5 °C
1 dB
2 dB
4 dB
8 dB
0.60
0.40
0.20
0.00
-0.20
-0.40
-0.60
0.0
0.5
1.0
1.5
F re que nc y ( G H z)
M/A-COM Technology Solutions Inc. (MACOM) and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice.
Visit www.macom.com for additional data sheets and product information.
For further information and support please visit:
https://www.macom.com/support
2.0
AT20-0106
Digital Attenuator
50.0 dB, 6-Bit, TTL Driver, DC-2.0 GHz
Rev. V10
Typical Performance Curves
RF1 VSWR vs. Frequency
Deviation from Nominal Atten (dB)
Attenuation Accuracy vs. Frequency
16 d B
3 2 dB
4 0 dB
50 d B
4 dB
2
1.00
1.8
VSWR
2.00
0.00
R ef Lo ss & 2 d B
1 dB
3 2 dB
8 & 16 d B
1.6
1.4
-1.00
1.2
-2.00
0.0
0.5
1.0
1.5
1
0.0
2.0
Fre que ncy (GHz )
8 dB
16 d B
1.0
1.5
2.0
Fre que ncy (GHz )
RF2 VSWR vs. Frequency
2
0.5
Lead-Free, CR-13 Ceramic Package†
R ef Lo ss 3 2 d B 2 d B
& 4 dB
1 dB
VSWR
1.8
1.6
1.4
1.2
1
0.0
0.5
1.0
1.5
2.0
Frequency (GHz)
†
Reference Application Note M538 for lead-free solder reflow
recommendations.
4
M/A-COM Technology Solutions Inc. (MACOM) and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice.
Visit www.macom.com for additional data sheets and product information.
For further information and support please visit:
https://www.macom.com/support
AT20-0106
Digital Attenuator
50.0 dB, 6-Bit, TTL Driver, DC-2.0 GHz
Rev. V10
M/A-COM Technology Solutions Inc. All rights reserved.
Information in this document is provided in connection with M/A-COM Technology Solutions Inc ("MACOM")
products. These materials are provided by MACOM as a service to its customers and may be used for
informational purposes only. Except as provided in MACOM's Terms and Conditions of Sale for such products or
in any separate agreement related to this document, MACOM assumes no liability whatsoever. MACOM
assumes no responsibility for errors or omissions in these materials. MACOM may make changes to
specifications and product descriptions at any time, without notice. MACOM makes no commitment to update
the information and shall have no responsibility whatsoever for conflicts or incompatibilities arising from future
changes to its specifications and product descriptions. No license, express or implied, by estoppels or otherwise,
to any intellectual property rights is granted by this document.
THESE MATERIALS ARE PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR
IMPLIED, RELATING TO SALE AND/OR USE OF MACOM PRODUCTS INCLUDING LIABILITY OR
WARRANTIES RELATING TO FITNESS FOR A PARTICULAR PURPOSE, CONSEQUENTIAL OR
INCIDENTAL DAMAGES, MERCHANTABILITY, OR INFRINGEMENT OF ANY PATENT, COPYRIGHT OR
OTHER INTELLECTUAL PROPERTY RIGHT. MACOM FURTHER DOES NOT WARRANT THE ACCURACY
OR COMPLETENESS OF THE INFORMATION, TEXT, GRAPHICS OR OTHER ITEMS CONTAINED WITHIN
THESE MATERIALS. MACOM SHALL NOT BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL, OR
CONSEQUENTIAL DAMAGES, INCLUDING WITHOUT LIMITATION, LOST REVENUES OR LOST PROFITS,
WHICH MAY RESULT FROM THE USE OF THESE MATERIALS.
MACOM products are not intended for use in medical, lifesaving or life sustaining applications. MACOM
customers using or selling MACOM products for use in such applications do so at their own risk and agree to
fully indemnify MACOM for any damages resulting from such improper use or sale.
5
M/A-COM Technology Solutions Inc. (MACOM) and its affiliates reserve the right to make changes to the product(s) or information contained herein without notice.
Visit www.macom.com for additional data sheets and product information.
For further information and support please visit:
https://www.macom.com/support