Programmable Attenuators
Models 4226 & 4228
0.8 to 2.5/3.0 GHz
Pin Switched Programmable Attenuators
Low Insertion Loss, Fast Switching
MAXIMUM INSERTION LOSS (dB):
Frequency (GHz)
0.8 - 3.0 (2.5)
4226-63
3.75
4228-63.75
4.50
4228-103
5.50
RoHS
MONOTONICITY:
4226-63 & 4228-103: 0.8 to 3.0 GHz
4228-63.75:
0.8 to 2.5 GHz
(minimum 1 dB
change)
Features
Ideal for use in Wireless/Cellular, RF Simulation/Emulation,
& Communication Test Applications.
o
Available in 6 and 8 Cell Configurations -
103 dB/1 dB steps
63 dB/1 dB steps
63.75/0.25 dB steps
o
High accuracy & fast switching speed
o
Built-in TTL Driver Circuitry
o
Special Configurations Available Upon Request.
-
Custom Cell/Step Size & Frequency Bands
3rd ORDER INTERMODULATION (IM3):
-55 dBm typical,
measured with two +10 dBm tones @ 869 MHz (f1) and
891 MHz (f2), the IM3 frequency being 847 MHz (2f1-f2).
IP3
(input) = +41 dBm
The input IP3 is derived from the following relationship:
IP3 = 3(Pin-
α
)-IM3 +
α
2
where
α
= the insertion loss (dB) at the IM3 frequency;
Pin=single tone input power (dBm).
Specifications
NOMINAL IMPEDANCE:
50
Ω
FREQUENCY RANGE:
4226-63:
4228-63.75:
4228-103:
MAXIMUM SWR:
Frequency Range (GHz)
0.8 - 3.0 (2.5)
CELL CONFIGURATIONS:
Model
NO.
Attenuation
Number
Cells Range/Steps
(dB)
4228-103
4228-63.75
4226-63
8
8
6
103/1
63.75/0.25
63/1
SWR
1.50
0.8 to 3.0 GHz
0.8 to 2.5 GHz
0.8 to 3.0 GHz
POWER RATING:
+24 dBm operating
+30 dBm (1 dB compression point)
SWITCHING TIME:
2
μsec.
maximum
OPERATING VOLTAGE:
+5 V + 5% @ 160 mA for 6 cell/
200 mA for 8 cell typical
TEMPERATURE RANGE (Operating):
0°C to +70°C
TEMPERATURE COEFFICIENT:
< 0.002 dB/dB/°C
CONNECTORS:
SMA female connectors - mate nonde-
structively with MIL-C-39012 connectors.
CONTROL CONNECTOR:
AMP-Latch 10 pin ribbon cable
connector mates with AMP P/N 746285-1 (supplied with
each unit)
WEIGHT:
4226-X
4228-X
160 g (5.7 oz)
210 g (7.4 oz)
Cell
Increments
(dB)
1, 2, 4, 8, 16, 24, 48
0.25, 0.5, 1, 2, 4, 8,
16, 32
1, 2, 4, 8, 16, 32
CONTROL CONFIGURATION:
Units are supplied with a
built-in TTL interface. Each unit is supplied with a mating 10
pin connector (Amp 746285-1). 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.
DRIVER SPECIFICATIONS:
minimum
2.0 V
-0.3 V
maximum
5.3 V
0.8 V
INCREMENTAL ATTENUATION ACCURACY:
CELL
dB
0.25
+0.1
0.50
1
2
4
8
16
24
32
48
+0.15 +0.2 +0.2
+0.2 +0.2 +0.3
+0.4 +0.6 +0.8
VIH
VIL
IPU
Input High Level
Input Low Level
Input Pull-up Current 500
μA
Typical
241
Note: Inputs have 10K pull-up resistors.
5305 Spectrum Drive, Frederick, MD 21703-7362
s
TEL: 301-846-9222, 800-638-2048
s
Fax: 301-846-9116
web: www.aeroflex.com/weinschel
s
email: weinschel-sales@aeroflex.com
Revision Date: 9/30/2012
Programmable Attenuators
PHYSICAL DIMENSIONS:
Models 4226 & 4228:
Control Connector J3 Pin Locations:
TTL Conn
PIN No. (J3)
1
2
3
NOTE:
1. All dimensions are given in mm (inches) and are maximum, unless
otherwise specified.
2. Unit available with RoHS compliant materials, specify when ordering.
4
5
6
7
8
9
10
4226-63
dB (Cell)
1
2
4
8
16
32
NC
NC
+5V
COM
4228-63.75
dB (Cell)
0.25
0.50
1
2
4
8
16
32
+5V
COM
4228-103
dB (Cell )
1
2
4
8
16
24
48
NC*
+5V
COM
Model No.
4226-X
4228-X
A
94.79 (3.73)
123.24 (4.85)
B
71.15 (2.80)
99.59 (4.85)
C
76.20 (3.00)
76.20 (3.00)
D
71.15 (2.80)
99.59 (4.85)
NC = Not Connected
* For Factory use only.
242
5305 Spectrum Drive, Frederick, MD 21703-7362
s
TEL: 301-846-9222, 800-638-2048
s
Fax: 301-846-9116
web: www.aeroflex.com/weinschel
s
email: weinschel-sales@aeroflex.com
Revision Date: 9/30/2012
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