Digital Attenuator
31.5 dB, 6-Bit, TTL Driver, DC-2.0 GHz
Rev. V9
AT-107-PIN
1
1
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
1
Features
Attenuation: 0.5 dB steps to 31.5 dB
Temperature Stability: ± 0.18 dB from –55°C to
+85°C Typical
Low DC Power Consumption
Hermetic Surface Mount Package
Integral TTL Driver
50 Ohm Nominal Impedance
Lead-Free CR-13 Package
260°C Reflow Compatible
RoHS* Compliant
Description
M/A-COM’s AT-107-PIN is a GaAs FET 6-bit digital
attenuator with a 0.5 dB minimum step size and 31.5
dB total attenuation. This attenuator and integral
TTL driver is in a hermetically sealed ceramic 24-
lead surface mount package. The AT-107-PIN is
ideally suited for use where accuracy, fast switching,
very low power consumption and low intermodula-
tion products are required. Typical applications in-
clude dynamic range setting in precision receiver
circuits and other gain/leveling control circuits. Envi-
ronmental screening is available. Contact the fac-
tory for information.
Ordering Information
Part Number Package
AT-107-PIN Bulk Packaging
AT-107-TB Sample Test Board
Note: Reference Application Note M513 for reel size
information.
Functional Schematic
Pin Configuration
Pin No. Function Pin No. Function
1 GND 13 RF2
2 GND 14 GND
3 GND 15 GND
4 C16 16 GND
5 C8 17 GND
6 Vee (-5V to -8V) 18 GND
7 Vcc (+5V) 19 GND
8 C4 20 GND
9 C2 21 GND
10 C1 22 GND
11 C0.5 23 GND
12 GND 24 RF1
* Restrictions on Hazardous Substances, European Union Directive 2011/65/EU.
PIN 1 GND
GND
GND
C16
C8
Vee (-5V to -8V)
Vcc (+5V)
C4
GND
GND
GND
GND
GND
GND
RF1 PIN 24
16 dB
8 dB
4 dB
2 dB
1 dB
0.5 dB
GND
GND
GND Orientation Mark
GND
RF2 PIN 13
C2
C1
C0.5
PIN 12 GND
The metal bottom of the case must be connected to RF and DC
ground.
Digital Attenuator
31.5 dB, 6-Bit, TTL Driver, DC-2.0 GHz
Rev. V9
AT-107-PIN
2
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
2
Electrical Specifications: TA = -55°C to +85°C 1
Parameter Frequency Units Min Typ Max Test Conditions
Reference Insertion Loss DC - 0.5 GHz
DC - 1.0 GHz
DC - 2.0 GHz
dB
dB
dB
—
—
—
—
—
—
3.2
3.6
4.0
—
Attenuation Accuracy 2 DC - 1.0 GHz
DC - 2.0 GHz
DC - 1.0 GHz
DC - 2.0 GHz
± (0.15 +3% of atten. setting in dB) dB
± (0.2 +3% of atten. setting in dB) dB
± (0.2 +3% of atten. setting in dB) dB
or ± 0.4 dB, whichever is greater
± (0.2 +3% of atten. setting in dB) dB
or ± 0.4 dB, whichever is greater
Any Single Bit
Any Combination of Bits
VSWR DC - 2.0 GHz Ratio — — 1.8:1 —
Trise, Tfall — ns — 9 — 10% to 90%
Ton, Toff — ns — 45 — 50% Control to 90/10% RF
Transients — mV — 40 — In-Band (peak-peak)
1 dB Compression 0.05 GHz
0.5 - 2.0 GHz
dBm
dBm
—
—
+21
+29
—
—
Input Power
Input Power
Input IP3 0.05 GHz
0.5 - 2.0 GHz
dBm
dBm
—
—
+35
+48
—
—
For two-tone Input Power
Up to +5 dBm
Input IP2 0.05 GHz
0.5 - 2.0 GHz
dBm
dBm
—
—
+45
+79
—
—
For two-tone Input Power
Up to +5 dBm
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
Vctl
Vctl
Logic 0 (TTL)
Logic 1 (TTL)
—
—
V
V
0.0
2.0
—
—
0.8
5.0
Input Leakage Current (Low) 0 to 0.8V — µA — — 1.0
Input Leakage Current (High) 2.0 to 5.0V — µA — — 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.
Digital Attenuator
31.5 dB, 6-Bit, TTL Driver, DC-2.0 GHz
Rev. V9
AT-107-PIN
3
3
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
3
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
Vin5 -0.5V ≤ Vin ≤ VCC + 0.5V
Operating Temperature -55°C to +125°C
Storage Temperature -65°C to +150°C
3. Exceeding any one or combination of these limits may cause
permanent damage to this device.
4. M/A-COM does not recommend sustained operation near
these survivability limits.
5. Standard CMOS TTL interface, latch-up will occur if logic
signal is applied prior to power supply.
Handling Procedures
Please observe the following precautions to avoid
damage:
Static Sensitivity
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.
Truth Table (Digital Attenuator)
Control Inputs
C6 C5 C4 C3 C2 C1 Attenuation
0 0 0 0 0 0 Reference
0 0 0 0 0 1 0.5 dB
0 0 0 0 1 0 1 dB
0 0 0 1 0 0 2 dB
0 0 1 0 0 0 4 dB
0 1 0 0 0 0 8 dB
1 0 0 0 0 0 16 dB
1 1 1 1 1 1 31.5 dB
0 = TTL Low; 1 = TTL High
Attenuation Accuracy vs. Frequency
Typical Performance Curves
Insertion Loss vs. Frequency
0.0
1.0
2.0
3.0
4.0
5.0
0.0 0.5 1.0 1.5 2.0
Fre quency (GHz)
Insertion Loss (dB)
+85°C
+25°C
-55 °C
-0.60
-0.40
-0.20
0.00
0.20
0.40
0.60
0.0 0.5 1.0 1.5 2.0
Deviation from Nominal Atten
(dB)
1 d B
2 d B
4 d B
0 . 5 d B
Digital Attenuator
31.5 dB, 6-Bit, TTL Driver, DC-2.0 GHz
Rev. V9
AT-107-PIN
4
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
4
RF1 VSWR vs. Frequency
RF2 VSWR vs. Frequency
Typical Performance Curves
Attenuation Accuracy vs. Frequency
-0.80
-0.40
0.00
0.40
0.80
0.0 0.5 1.0 1.5 2.0
Fre quency (GHz )
Deviation from Nominal Atten
(dB)
8 d B
16 d B
3 1.5 d B
1
1.2
1.4
1.6
1.8
2
0.0 0.5 1.0 1.5 2.0
Fre quency (GHz )
VSWR
1 d B
4 d B
8 & 16 d B
R ef Lo s s & 0 .5 d B
1
1.2
1.4
1.6
1.8
2
0.0 0.5 1.0 1.5 2.0
Freque ncy (GHz)
VSWR
1 & 2 d B
4 d B
8 d B
16 d B
R ef Lo s s & 0 . 5 d B
† Reference Application Note M538 for lead-free solder reflow
recommendations.
Lead-Free, CR-13 Ceramic Package†
Digital Attenuator
31.5 dB, 6-Bit, TTL Driver, DC-2.0 GHz
Rev. V9
AT-107-PIN
5
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
5
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.
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IMPLIED, RELATING TO SALE AND/OR USE OF MACOM PRODUCTS INCLUDING LIABILITY OR
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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
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fully indemnify MACOM for any damages resulting from such improper use or sale.