• North America Tel: 800.366.2266 • Europe Tel: +353.21.244.6400
• India Tel: +91.80.4155721 • China Tel: +86.21.2407.1588
Visit www.macomtech.com for additional data sheets and product information.
M/A-COM Technology Solutions Inc. and its affiliates reserve the right to make
changes to the product(s) or information contained herein without notice.
1
Digital Attenuator
30.0 dB, 4-Bit, TTL Driver, DC-2.5 GHz
Rev. V5
AT90-0233
ADVANCED: Data Sheets contain information regarding a product M/A-COM Technology Solutions
is considering for development. Performance is based on target specifications, simulated results,
and/or prototype measurements. Commitment to develop is not guaranteed.
PRELIMINARY: Data Sheets contain information regarding a product M/A-COM Technology
Solutions has under development. Performance is based on engineering tests. Specifications are
typical. Mechanical outline has been fixed. Engineering samples and/or test data may be available.
Commitment to produce in volume is not guaranteed.
Features
• Attenuation: 2 dB Steps to 30 dB
• Low DC Power Consumption
• Small Footprint, JEDEC Package
• Integral TTL Driver
• 50 Ohm Impedance
• Test Boards Available
• Tape and Reel Packaging Available
• CSP-1 Package
Description
M/A-COM’s AT90-0233 is a GaAs FET 4-Bit digital
attenuator with integral driver. Step size is 2 dB pro-
viding a 30 dB attenuation range. This device is in
an PQFN plastic surface mount package. The
AT90-0233 is suited for use where accuracy, fast
speed, very low power consumption and low costs
are required.
.
Ordering Information
Part Number Package
AT90-0233 Bulk Packaging
AT90-0233TR 1000 piece reel
AT90-0233-TB Sample Test Board
Note: Reference Application Note M513 for reel size
information.
Schematic with Off-Chip Components
Pin Configuration
Pin No. Function Pin No. Function
1 GND 17 N/C
2 C16 18 N/C
3 C8 19 N/C
4 C4 20 N/C
5 C2 21 N/C
6 GND 22 N/C
7 GND 23 N/C
8 N/C 24 N/C
9 N/C 25 N/C
10 N/C1 26 GND
11 GND 27 RF2
12 RF1 28 GND
13 GND 29 N/C1
14 N/C 30 VEE
15 N/C 31 N/C
16 N/C 32 VCC
1. Pins 10 and 29 must be isolated.
2. The exposed pad centered on the package bottom must be
connected to RF and DC ground. (For PQFN Packages)
• North America Tel: 800.366.2266 • Europe Tel: +353.21.244.6400
• India Tel: +91.80.4155721 • China Tel: +86.21.2407.1588
Visit www.macomtech.com for additional data sheets and product information.
M/A-COM Technology Solutions Inc. and its affiliates reserve the right to make
changes to the product(s) or information contained herein without notice.
2
Digital Attenuator
30.0 dB, 4-Bit, TTL Driver, DC-2.5 GHz
Rev. V5
AT90-0233
ADVANCED: Data Sheets contain information regarding a product M/A-COM Technology Solutions
is considering for development. Performance is based on target specifications, simulated results,
and/or prototype measurements. Commitment to develop is not guaranteed.
PRELIMINARY: Data Sheets contain information regarding a product M/A-COM Technology
Solutions has under development. Performance is based on engineering tests. Specifications are
typical. Mechanical outline has been fixed. Engineering samples and/or test data may be available.
Commitment to produce in volume is not guaranteed.
Electrical Specifications: TA = +25°C
Parameter Frequency Units Min Typ Max
Insertion Loss DC - 2.5 GHz dB — 2.7 3.0
Attenuation Accuracy DC - 2.5 GHz dB — — ±(.3 +5% of atten setting)
VSWR DC - 2.5 GHz Ratio — 1.5:1 1.8:1
Switching Speed —
—
nS
nS
—
—
75
20
150
50
1 dB Compression 50 MHz
0.5 - 2.5 GHz
dBm
dBm
—
—
+21
+29
—
—
Input IP3 50 MHz
0.5 - 2.5 GHz
dB
dB
—
—
+35
+48
—
—
Vcc
Vee
—
—
V
V
4.75
-8.0
5.0
-5.0
5.25
-4.75
VIL
VIH
V
V
0.0
2.0
—
—
0.8
5.0
lin (Input Leakage Current) uA -1.0 — 1.0
Test Conditions
—
Individual Bits or Combination of Bits
Full Range
50% Cntl to 90%/10% RF
10% to 90% or 90% to 10%
—
—
Two-tone inputs up to +5 dBm
—
—
LOW-level input voltage
HIGH-level input voltage
Vin = VCC or GND
Icc
(Quiescent Supply Current)
Vcntrl = VCC or GND uA — 250 400
ΔIcc
(Additional Supply Current
Per TTL Input Pin)
VCC = Max, Vcntrl = VCC - 2.1 V mA — — 1.0
Thermal Resistance θjc — — °C/W — 15 —
IEE VEE min to max, Vin = VIL or VIH mA -1.0 -0.2 —
Recommended PCB Configuration6
Absolute Maximum Ratings 3,4
Parameter Absolute Maximum
Max. Input Power
0.05 GHz
0.5 - 2.5 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 -40ºC to +85ºC
Storage Temperature -65ºC to +125ºC
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.
6. Application Note C2083 is available on line at www.macom.com
• North America Tel: 800.366.2266 • Europe Tel: +353.21.244.6400
• India Tel: +91.80.4155721 • China Tel: +86.21.2407.1588
Visit www.macomtech.com for additional data sheets and product information.
M/A-COM Technology Solutions Inc. and its affiliates reserve the right to make
changes to the product(s) or information contained herein without notice.
3
Digital Attenuator
30.0 dB, 4-Bit, TTL Driver, DC-2.5 GHz
Rev. V5
AT90-0233
ADVANCED: Data Sheets contain information regarding a product M/A-COM Technology Solutions
is considering for development. Performance is based on target specifications, simulated results,
and/or prototype measurements. Commitment to develop is not guaranteed.
PRELIMINARY: Data Sheets contain information regarding a product M/A-COM Technology
Solutions has under development. Performance is based on engineering tests. Specifications are
typical. Mechanical outline has been fixed. Engineering samples and/or test data may be available.
Commitment to produce in volume is not guaranteed.
VSWR @ Insertion Loss
Attenuation Error, 2 dB Bit Attenuation Error, 4 dB Bit
Typical Performance Curves
Insertion Loss
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.
Moisture Sensitivity
The MSL rating for this part is defined as Level 2
per IPC/JEDEC J-STD-020. Parts shall be stored
and/or baked as required for MSL Level 2 parts.
Truth Table (Digital Attenuator)
C16 C8 C4 C2 Attenuation
0 0 0 0 Loss, Reference
0 0 0 1 2.0 dB
0 0 1 0 4.0 dB
0 1 0 0 8.0 dB
1 0 0 0 16.0 dB
1 1 1 1 30.0 dB
0 = TTL Low; 1 = TTL High
1. 0 0
1. 5 0
2.00
2.50
3.00
0 500 1000 1500 2000 2500
Freq uency (MHz)
Attenuation (dB)
1. 0 0
1. 2 0
1. 4 0
1. 6 0
0 500 1000 1500 2000 2500
Frequency (MHz)
VSWR
InputOutput
-0.30
-0.20
-0.10
0.00
0.10
0.20
0.30
0 500 1000 1500 2000 2500
Frequency (M Hz)
Attenuation (dB)
-0.40
-0.20
0.00
0.20
0.40
0 500 1000 1500 2000 2500
Freq uency (M Hz)
Attenua tion (dB)
• North America Tel: 800.366.2266 • Europe Tel: +353.21.244.6400
• India Tel: +91.80.4155721 • China Tel: +86.21.2407.1588
Visit www.macomtech.com for additional data sheets and product information.
M/A-COM Technology Solutions Inc. and its affiliates reserve the right to make
changes to the product(s) or information contained herein without notice.
4
Digital Attenuator
30.0 dB, 4-Bit, TTL Driver, DC-2.5 GHz
Rev. V5
AT90-0233
ADVANCED: Data Sheets contain information regarding a product M/A-COM Technology Solutions
is considering for development. Performance is based on target specifications, simulated results,
and/or prototype measurements. Commitment to develop is not guaranteed.
PRELIMINARY: Data Sheets contain information regarding a product M/A-COM Technology
Solutions has under development. Performance is based on engineering tests. Specifications are
typical. Mechanical outline has been fixed. Engineering samples and/or test data may be available.
Commitment to produce in volume is not guaranteed.
Attenuation Error, 16 dB Bit
Attenuation Error, Max. Attenuation VSWR, 2 dB Bit
VSWR, 4 dB Bit VSWR, 8 dB Bit
Attenuation Error, 8 dB Bit
-0.40
-0.20
0.00
0.20
0.40
0 500 1000 1500 2000 2500
Fre quency (MHz)
Attenuation (dB)
-0.80
-0.60
-0.40
-0.20
0.00
0 500 1000 1500 2000 2500
Frequency (M Hz )
Attenuation (dB)
-1.50
-1.00
-0.50
0.00
0.50
0 500 1000 1500 2000 2500
Freque ncy (MHz)
Attenuation (dB)
1. 0 0
1. 2 0
1. 4 0
1. 6 0
0 500 1000 1500 2000 2500
Fre quency (MHz)
VSWR
Output Input
1. 0 0
1. 2 0
1. 4 0
1. 6 0
0 500 1000 1500 2000 2500
Frequency (MHz)
VSWR
Output Input
1. 0 0
1. 2 0
1. 4 0
1. 6 0
0 500 1000 1500 2000 2500
Fre quency (MHz)
VSWR
Output Input
Typical Performance Curves
• North America Tel: 800.366.2266 • Europe Tel: +353.21.244.6400
• India Tel: +91.80.4155721 • China Tel: +86.21.2407.1588
Visit www.macomtech.com for additional data sheets and product information.
M/A-COM Technology Solutions Inc. and its affiliates reserve the right to make
changes to the product(s) or information contained herein without notice.
5
Digital Attenuator
30.0 dB, 4-Bit, TTL Driver, DC-2.5 GHz
Rev. V5
AT90-0233
ADVANCED: Data Sheets contain information regarding a product M/A-COM Technology Solutions
is considering for development. Performance is based on target specifications, simulated results,
and/or prototype measurements. Commitment to develop is not guaranteed.
PRELIMINARY: Data Sheets contain information regarding a product M/A-COM Technology
Solutions has under development. Performance is based on engineering tests. Specifications are
typical. Mechanical outline has been fixed. Engineering samples and/or test data may be available.
Commitment to produce in volume is not guaranteed.
VSWR, Maximum Attenuation VSWR, 16 dB Bit
1. 0 0
1. 2 0
1. 4 0
1. 6 0
0 500 1000 1500 2000 2500
Frequency (MHz)
VSWR
Output Input
1. 0 0
1. 2 0
1. 4 0
1. 6 0
0 500 1000 1500 2000 2500
Fre quency (MHz)
VSWR
Output Input
CSP-1, 4 x 6 mm, 32-lead PQFN†
† Reference Application Note M538 for lead-free solder reflow
recommendations.
Typical Performance Curves
