Digital Attenuator, 1-Bit, 15 dB
DC - 2.0 GHz
MAADSS0008
M/A-COM Inc. and its affiliates reserve the right to make changes to the
product(s) or information contained herein without notice. M/A-COM makes
no warranty, representation or guarantee regarding the suitability of its
products for any particular purpose, nor does M/A-COM assume any liability
whatsoever arising out of the use or application of any product(s) or
information.
• North America Tel: 800.366.2266 / Fax: 978.366.2266
• Europe Tel: 44.1908.574.200 / Fax: 44.1908.574.300
• Asia/Pacific Tel: 81.44.844.8296 / Fax: 81.44.844.8298
Visit www.macom.com for additional data sheets and product information.
V1
1
RoHS
Compliant
Features
•Single 15-dB Step
•Low Loss, 0.3 dB Typical @ 900 MHz
•2.5 to 5.0 Volt Operation
•Tape and Reel Packaging Available
•Lead-Free SOT-25 Package
•100% Matte Tin Plating over Copper
•Halogen-Free “Green” Mold Compound
•260°C Reflow Compatible
•RoHS* Compliant Version of AT-267
Description
M/A-COM’s MAADSS0008 is a 1-bit, 15-dB step
GaAs MMIC digital attenuator in a lead-free SOT-25,
5 lead surface mount plastic package. The
MAADSS0008 is ideally suited for use where high
accuracy, very low power consumption and low
intermodulation products are required.
Typical applications include wireless handsets, base
stations, wireless LAN equipment, GPS receivers
and any RF applications with automatic gain/level
control circuits.
The MAADSS0008 is fabricated as a monolithic
GaAs integrated circuit using a mature PHEMT
process. The process features full chip passivation
for performance and reliability.
Functional Schematic
Pin Configuration
Pin No. Function Pin No. Function
1 RF Input Port 4 V1
2 Ground 5 V2
3 RF Output Port
Ordering Information 1
Part Number Package
MAADSS0008TR 1000 piece reel
MAADSS0008TR-3000 3000 piece reel
MAADSS0008SMB Sample Board
1. Reference Application Note M513 for reel size information.
Absolute Maximum Ratings 2,3
Parameter Absolute Maximum
Input Power +21 dBm
Control Voltage VC ≤ 8V
Operating Temperature -40°C to +85°C
Storage Temperature -65°C to +150°C
2. Exceeding any one or combination of these limits may cause
permanent damage to this device.
3. M/A-COM does not recommend sustained operation near
these survivability limits.
5 4
1 32
* Restrictions on Hazardous Substances, European Union Directive 2002/95/EC.
Digital Attenuator, 1-Bit, 15 dB
DC - 2.0 GHz
MAADSS0008
M/A-COM Inc. and its affiliates reserve the right to make changes to the
product(s) or information contained herein without notice. M/A-COM makes
no warranty, representation or guarantee regarding the suitability of its
products for any particular purpose, nor does M/A-COM assume any liability
whatsoever arising out of the use or application of any product(s) or
information.
• North America Tel: 800.366.2266 / Fax: 978.366.2266
• Europe Tel: 44.1908.574.200 / Fax: 44.1908.574.300
• Asia/Pacific Tel: 81.44.844.8296 / Fax: 81.44.844.8298
Visit www.macom.com for additional data sheets and product information.
V1
2
RoHS
Compliant
Truth Table 5,6
Mode
(Control)
V1 V2 Attenuation
Positive 5 0 ± 0.2V
+2.5V to +5V
+2.5V to +5V
0 ± 0.2V
15 dB
Reference State
Negative 6 0 ± 0.2V
-2.5V to -5V
-2.5V to -5V
0 ± 0.2V
Reference State
15 dB
5. External DC blocking capacitors are required as noted.
6. If negative control is used, DC blocking capacitors are not
required on RF ports and ground.
Electrical Specifications4: TA = 25°C, VC = +2.5 Volts, Z0 = 50 Ω
Positive Control Voltage Schematic
5 4
1 32
39 pF 39 pF 39 pF
Parameter Test Conditions Units Min Typ Max
Insertion Loss
(Reference State)
1.0 GHz
2.0 GHz
dB
dB
—
—
0.3
0.4
0.4
0.5
Attenuation 1.0 GHz
2.0 GHz
dB
dB
14.6
14.4
15.1
14.9
15.6
15.4
VSWR 1.0 GHz
2.0 GHz
Ratio
Ratio
—
—
1.2:1
1.3:1
—
—
Input IP3 1.0 GHz
Insertion Loss State
Attenuation State
dBm
dBm
40
40
50
50
—
—
P1dB 1.0 GHz
Insertion Loss State
Attenuation State
dBm
dBm
24
20
26
23
—
—
Control Current — µA — — 10
Trise, Tfall 10% to 90% RF, 90% to 10% RF nS — 29 —
Ton, Toff 50% Control to 90% RF,
50% Control to 10% RF
nS — 50 —
Transients In-band mV — 10 —
4. For positive voltage control, external DC blocking capacitors are required on all RF ports (pins 1, 2 and 3).
Lead-Free SOT-25†
† Reference Application Note M538 for lead-free solder reflow
recommendations.
Digital Attenuator, 1-Bit, 15 dB
DC - 2.0 GHz
MAADSS0008
M/A-COM Inc. and its affiliates reserve the right to make changes to the
product(s) or information contained herein without notice. M/A-COM makes
no warranty, representation or guarantee regarding the suitability of its
products for any particular purpose, nor does M/A-COM assume any liability
whatsoever arising out of the use or application of any product(s) or
information.
• North America Tel: 800.366.2266 / Fax: 978.366.2266
• Europe Tel: 44.1908.574.200 / Fax: 44.1908.574.300
• Asia/Pacific Tel: 81.44.844.8296 / Fax: 81.44.844.8298
Visit www.macom.com for additional data sheets and product information.
V1
3
RoHS
Compliant
Typical Performance Curves
Insertion Loss with Negative Control
0.0
0.2
0.4
0.6
0.8
1.0
0.0 0.5 1.0 1.5 2.0 2.5 3.0
Frequency (GHz)
Insertion Loss (dB)
+25C +85C -40C
0.0
0.2
0.4
0.6
0.8
1.0
0.0 0.5 1.0 1.5 2.0 2.5 3.0
Frequency (GHz)
Insertion Loss (dB)
+25C +85C -40C
12
13
14
15
16
17
0.0 0.5 1.0 1.5 2.0 2.5 3.0
Frequency (GHz)
Attenuation (dB)
+25C +85C -40C
12
13
14
15
16
17
0.0 0.5 1.0 1.5 2.0 2.5 3.0
Frequency (GHz)
Attenuation (dB)
+25C +85C -40C
1.0
1.2
1.4
1.6
1.8
2.0
0.0 0.5 1.0 1.5 2.0 2.5 3.0
Frequency (GHz)
VSWR
0dB 15dB
1.0
1.2
1.4
1.6
1.8
2.0
0.0 0.5 1.0 1.5 2.0 2.5 3.0
Frequency (GHz)
VSWR
0dB 15dB
Insertion Loss with Positive Control
Attenuation with Negative Control Attenuation with Positive Control
VSWR, 0 and 15 dB States with Negative Control at
+25°C
VSWR, 0 and 15 dB States with Positive Control at
+25°C
