Digital Attenuator
30.0 dB, 4-Bit, TTL Driver, DC-2.0 GHz
AT-232-PIN
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.
V4
1
RoHS
Compliant
Features
• Attenuation: 2 dB steps to 30 dB
• Temperature Stability: ± 0.18 dB from –55°C to
+85°C Typical
• Low DC Power Consumption
• Hermetic Surface Mount Package
• Fast Switching Speed, 12 ns Typical
• 50 Ohm Nominal Impedance
• Lead-Free CR-6 Package
• 260°C Reflow Compatible
Description
M/A-COM’s AT-232-PIN is a GaAs FET 4-bit digital
attenuator with a 2 dB minimum step size and 30 dB
total attenuation. This attenuator is in a hermetically
sealed ceramic 16-lead surface mount package. The
AT-232-PIN is ideally suited for use where accuracy,
fast switching, very low power consumption and low
intermodulation products are required. Typical appli-
cations include dynamic range setting in precision
receiver circuits and other gain/leveling control cir-
cuits. Environmental screening is available. Contact
the factory for information.
Ordering Information
Part Number Package
AT-232-PIN Bulk Packaging
Note: Reference Application Note M513 for reel size
information.
Note: Die quantity varies.
Functional Schematic
Pin Configuration
Pin No. Function Pin No. Function
1 VC1 9 RF2
2 /VC1 10 GND
3 VC2 11 GND
4 /VC2 12 GND
5 VC3 13 GND
6 /VC3 14 GND
7 VC4 15 GND
8 /VC4 16 RF1
The metal bottom of the case must be connected to RF and DC
ground.
* Restrictions on Hazardous Substances, European Union Directive 2002/95/EC.
PIN 1 VC1
/VC1
VC2
/VC2
VC3
/VC3
VC4
/VC4
RF1 PIN 16
GND
GND
GND
GND
GND
GND Orientation Mark
RF2
16 dB
8 dB
4 dB
2 dB
Digital Attenuator
30.0 dB, 4-Bit, TTL Driver, DC-2.0 GHz
AT-232-PIN
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.
V4
2
RoHS
Compliant
Electrical Specifications: From –55°C to +85°C
1
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
—
—
—
—
—
—
2.0
2.3
2.5
Attenuation Accuracy
2
Any Single Bit
Any Combination of Bits
DC - 1.0 GHz
DC - 2.0 GHz
DC - 1.0 GHz
DC - 2.0 GHz
VSWR — DC - 2.0 GHz Ratio — — 1.6:1
Trise, Tfall 10% to 90% — ns — 12 —
Ton, Toff 50% Control to 90/10% RF — ns — 18 —
Transients In-Band (peak-peak) — mV — 25 —
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
—
—
+40
+50
—
—
Input IP2 For two-tone Input Power
Up to +5 dBm
0.05 GHz
0.5 - 2.0 GHz
dBm
dBm
—
—
+45
+68
—
—
± (0.15 dB +3% of atten setting in dB) dB
± (0.2 dB +3% of atten setting in dB) dB
Or ± 0.45 dB, whichever is greater
± (0.22 dB +3% of atten setting in dB) dB
± (0.25 dB +4% of atten setting in dB) dB
Or ± 0.45 dB, whichever is greater
Input Leakage Current (Low) -0.2 to 0V — µA — — 20
Input Leakage Current (High) -8.0 to -5.0V — µA — — 200
1. All specifications apply when operated with control voltages of 0.0V to -5.0V.
2. This attenuator is guaranteed monotonic.
Absolute Maximum Ratings
3,4
Parameter Absolute Maximum
Max Input Power
0.05 GHz
0.5 - 2.0 GHz
+27 dBm
+34 dBm
Control Voltage
5
+0.5V, -8.5V
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.
Digital Attenuator
30.0 dB, 4-Bit, TTL Driver, DC-2.0 GHz
AT-232-PIN
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.
V4
3
RoHS
Compliant
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)
/VC4 VC4 /VC3 VC3 /VC2 VC2 /VC1 VC1 Atten.
(dB)
-5V 0V -5V 0V -5V 0V -5V 0V Ref.
0V -5V -5V 0V -5V 0V -5V 0V 2 dB
-5V 0V 0V -5V -5V 0V -5V 0V 4 dB
-5V 0V -5V 0V 0V -5V -5V 0V 8 dB
-5V 0V -5V 0V -5V 0V 0V -5V 16 dB
0V -5V 0V -5V 0V -5V 0V -5V 30 dB
Control Inputs
VSWR vs. Frequency
Attenuation Accuracy vs. Frequency
Typical Performance Curves
Ref. Insertion Loss vs. Frequency
0
1
2
3
4
0.0 0.5 1.0 1.5 2.0 2.5 3.0
Frequency (GHz)
Insertion Loss (dB)
+ 8 5 °C+ 2 5
°C
- 5 5
°C
1.0
1.1
1.2
1.3
1.4
1.5
1.6
0.0 0.5 1.0 1.5 2.0 2.5 3.0
Frequency (GHz)
VSWR
2 dB 4 dB 8 d B 16 dB 3 0 dB In se rtion Loss
- 1.00
- 0.50
0.00
0.50
1.00
1.50
2.00
2.50
3.00
0.0 0.5 1.0 1.5 2.0 2.5 3.0
Frequency (GHz)
Dev ia tio n fro m No m ina l Atten
(dB )
2 dB 4 d B 8 dB16 dB 3 0 dB
Digital Attenuator
30.0 dB, 4-Bit, TTL Driver, DC-2.0 GHz
AT-232-PIN
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.
V4
4
RoHS
Compliant
Lead-Free, CR-6 Ceramic Package
†
†
Reference Application Note M538 for lead-free solder reflow
recommendations.
