Programmable Attenuators
Models 3406 & 3408
Programmable Attenuators
Ideal for Wireless/Test Applications
CELL CONFIGURATIONS:
Model
Number
3406-55
3408-55.75
3408-103
NO. Attenuation
Cells Range/Steps
(dB)
6
8
8
55/1
55.75/0.25
103/1
Cell
Increments
(dB)
1, 2, 4, 8, 16, 24
0.25, 0.5, 1, 2, 4, 8,
16, 24
1, 2, 4, 8, 16, 24, 48*
dc to 6.0 GHz
1 Watt
Features
o
Higher Frequency range to 6 GHz.
o
Wide Selection of Attenuation Ranges & Step
Sizes
- 0 to 55 dB in 1 dB steps
- 0 to 103 dB in 1 dB steps
- 0 to 55.75 in 0.25 dB steps
o
High Quality Construction & Connectors
o
Special Configurations Available Upon Request
*48 dB cell comprised of two 24 dB cells
INCREMENTAL ATTENUATION ACCURACY:
Frequency
Range (GHz)
dc - 3
3-6
Accuracy
+0.3 dB or 2% whichever is greater
+0.4 dB or 3% whichever is greater
MAXIMUM INSERTION LOSS (dB):
Frequency
Range (GHz)
dc - 3
3-6
3206-55
3408-55.75
3408-103
3.40
5.00
Description
The 3400 Series Programmable Step Attenuators are
designed for use in automatic test equipment and OEM
systems operating in the dc to 6 GHz frequency range. This
series is available in many standard attenuation ranges and
cell configurations. Custom designed configurations are
available upon request. Each cell contains a double-pole,
double-throw relay that provides a zero path or attenu-
ated path for the RF signal.
Microstrip circuitry and special compensation techniques
produce flat attenuation versus frequency characteristics.
The microstrip construction, using thin-film circuit ele-
ments, ensures product uniformity. To minimize RF
leakage, the 3400 Series Attenuators are provided with
gold-plated contact areas and feedthrough filters at each
control terminal.
2.60
3.80
MONOTONICITY:
dc to 6.0 GHz
POWER RATING:
1 watt average to 25°C ambient tem-
perature, derated linearly to 0.25 watt @ 70°C. 50 watts
peak (5
μsec
pulse width; 1% duty cycle)
POWER COEFFICIENT:
<0.005 dB/dB/watt
RATED SWITCH LIFE:
5 million cycles operations per cell
@ 0 dBm
SWITCHING TIME:
6 msec. maximum at nominal rated
voltage
RELEASE TIME:
5 msec maximum
CYCLING RATE:
5 Hz maximum per relay
OPERATING VOLTAGE:
+12V (+13V maximum; +9V min-
imum)
OPERATING CURRENT:
17 mA typical per cell @ +12V
TEMPERATURE RANGE (Operating):
-30°C to +70°C
TEST DATA:
Test data is available at additional cost.
Specifications
NOMINAL IMPEDANCE:
50
Ω
FREQUENCY RANGE:
dc to 6.0 GHz
MAXIMUM SWR:
Frequency Range (GHz)
dc - 3
3-6
102
SWR
1.30
1.45
5305 Spectrum Drive, Frederick, MD 21703-7362 TEL: 301-846-9222, 800-638-2048 Fax: 301-846-9116
web: www.aeroflex.com/weinschel email: weinschel-sales@aeroflex.com
Revision Date: 3/4/09
Programmable Attenuators
SPECIFICATIONS - Con’t
CONNECTORS:
SMA female connectors per MIL-STD-348
interface dimensions - mate nondestructively with
MIL-C-39012 connectors. eads. May be used with PC board
sockets/ receptacles.
CONTROL TERMINALS:
0.040 inch. (1 mm) diameter
solderable leads. May be used with PC board sockets/
receptacles.
CONSTRUCTION:
Housing:
Aluminum
Connectors:
Stainless steel body and beryllium
copper contacts.
Control terminals: Brass/Copper, Silver plated
WEIGHT (Typical):
3406-X:
99 g (3.5 oz)
3408-X:
135 g (4.8 oz)
Note: Control is non-latching and requires a continuous
control signal for the period of time in which attenuation is
required.
TTL DRIVER SPECIFICATIONS:
INTERFACE CONNECTOR:
Option -1: 10 pin .025 square
post header on .1 center, mates with Amp connector
746285-1 or equivalent
INPUT VOLTAGE:
VIN High=
+2.0V minimum
+5.0V typical
Vcc maximum
0 minimum
VIN Low =
INPUT CURRENT:
CONTROL CONFIGURATION:
Standard Unit:
One terminal is connected to case ground
and the remaining terminals are provided for activation of
individual cells. Attenuation is fail-safe to "0" setting in the
absence of a control voltage. Application of a voltage (+) to
a particular cell causes it to switch to the attenuate position.
Units with TTL Option:
Units with this options are supplied
with a very low profile connectorized TTL interface board
mounted directly to the control terminals. This TTL interface
option is available with a 10 pin ribbon cable connector and
is supplied with a mating connector. Refer to Physical
Dimensions for mating connector pin/wiring details. Two
wires are specified for supply voltage and ground. The
remaining wires will accept TTL control signals to activate or
de-activate a particular attenuation cell. A TTL high will
energize a cell to the high attenuation state, whereas a TTL
low will maintain a cell in its zero attenuation state.
To order 3400 Series Attenuators with this option add -1 to
basic model number for ribbon cable connector. Example:
Model 3406-63 with a TTL interface would be 3406-63-1.
SUPPLY CURRENT:
SUPPLY VOLTAGE:
0.8 maximum
IIN (VIN=2.4 V) = 55
μA
IIN (VIN=3.85 V) = 280
μA
ICC=25 mA maximum per cell
VCC=+12.0 to +15 V
MODELS WITH BUILT-IN DRIVERS:
Most 3400s are avail-
able with an intelligent interface\driver cards. These are
designed to interface with our 8210A Series Controllers
which greatly simplifies computer control applications. Refer
to Model 3406T and 3408T data sheet for more information.
103
5305 Spectrum Drive, Frederick, MD 21703-7362 TEL: 301-846-9222, 800-638-2048 Fax: 301-846-9116
web: www.aeroflex.com/weinschel email: weinschel-sales@aeroflex.com
Revision Date: 3/4/09
Programmable Attenuators
PHYSICAL DIMENSIONS:
A
B
Aeroflex / Weinschel
C
D
Model No.
3408-X
3406-X
NOTE:
No. Cells
8
6
A
136.1 (5.36)
105.7 (3.66)
B
123.4 (4.86)
93.0 (3.66)
C
7 EQ SPCS @ 15.20 (.60) = 106.7 (4.20)
5 EQ SPCS @ 15.20 (.60) =76.0 (3.00)
D
128.5 (5.06)
98.0 (3.86)
All dimensions are given in mm (inches) and are nominal, unless otherwise specified.
104
5305 Spectrum Drive, Frederick, MD 21703-7362 TEL: 301-846-9222, 800-638-2048 Fax: 301-846-9116
web: www.aeroflex.com/weinschel email: weinschel-sales@aeroflex.com
Revision Date: 3/4/09
Programmable Attenuators
PHYSICAL DIMENSIONS:
TTL OPTION -1 (3406 & 3408)
Control Connector J3 Pin Locations:
TTL Conn
PIN No. (J3)
1
2
3
4
5
6
7
8
9
10
3408-103-1
dB (Cell)
24*
24
1
2
4
8
16
24*
+Vcc
COM
3408-55.75-1
dB (Cell)
0.25
0.5
1
2
4
8
16
24
+Vcc
COM
3406-55-1
dB (Cell )
1
2
4
8
16
24
NC
NC
+Vcc
COM
* 48 dB cell comprised of two 24 dB cells
NC = Not Connected
NOTE:
All dimensions are given in mm (inches) and are nominal, unless otherwise specified.
105
5305 Spectrum Drive, Frederick, MD 21703-7362 TEL: 301-846-9222, 800-638-2048 Fax: 301-846-9116
web: www.aeroflex.com/weinschel email: weinschel-sales@aeroflex.com
Revision Date: 3/4/09
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