GaAs Digital Attenuator, 31 dB, 5 Bit
DC - 2 GHz
0.000
0.115
(2.92)
0.23 Ref
(5.8)
0.000
0.070
(1.78)
AT-357
V3.00
q
q
q
Attenuation 1 dB Steps to 31 dB
TTL Control Interface
Hermetic Connectorized Housing
(
.093鹵.005 Dia Thru
(2.36 鹵 0.13)
4 Places
1.375
(34.92)
Features
C-46
Guaranteed Speci鏗乧ations
1
p
Frequency Range
Nominal Attenuation
2
Attenuation Accuracy
DC 鈥?1.0 GHz
1.0 鈥?2.0 GHz
VSWR
(-55擄C to +85擄C)
)
DC to 2.0 GHz
1 dB Steps to 31 dB
0.000
0.330
(8.38)
0.000
0.205
(5.21)
Removable
SMA Jack
Receptacle
2 Places
0.250
(6.35)
0.660 (16.76)
1.235 鹵 .005
(31.37 鹵 0.13)
0.230 (5.84)
0.115 (2.92)
0.000
0.250
(6.35)
鹵(0.2
dB + 2% of Attenuation Setting in dB) dB
鹵(0.2
dB + 2% of Attenuation Setting in dB) dB
DC 鈥?.025 GHz
.025 鈥?0.5 GHz
0.2 鈥?2.0 GHz
0.5 鈥?1.0 GHz
DC 鈥?0.5 GHz
0.5 鈥?1.0 GHz
1.0 鈥?2.0 GHz
2.2:1 Max
1.8:1 Max
1.5:1 Max
1.4:1 Max
5.5 dB Max
6.0 dB Max
6.5 dB Max
0.20
(5.1)
Typ
Reference Insertion Loss
0.090 (2.29)
10 Places .025 鹵.005 Dia Pin
(0.64 鹵 0.13)
0.900 Ref.
11 Places
(22.86)
Operating
g
Characteristics
p
Impedance
Switching Characteristics
Ton, (50% CTL to 90% RF)
Toff (50% CTL to 10% RF)
Trise, (10% RF to 90% RF)
Tfall (90% RF to 10% RF)
Switching Transients (unfiltered)
Input Power for 1 dB Compression
0.5 鈥?2.0 GHz
0.05 GHz
50 Ohms Nominal
160 ns Typ
80 ns Typ
15 ns Typ
3 ns Typ
130 mV Typ
28 dBm Typ
15 dBm Typ
Bottom of case is AC ground.
Dimensions in ( ) are in mm.
Unless Otherwise Noted: .xxx = 鹵 0.010 (.xx = 鹵 0.25)
.xx = 鹵 0.02 (.x = 鹵 0.5)
Functional Schematic (Top View)
1 dB
2 dB
4 dB
8 dB
16dB
RF1
RF2
Intermodulation Intercept Point (for two-tone input power up to +5 dBm)
Intercept Points
IP2
IP3
0.5 鈥?2.0 GHz
+55
+47
dBm Typ
0.05 GHz
+45
+28
dBm Typ
Bias Power
Control
Vin Low (0)
Vin High (1)
+15 VDC @ 5 mA Max
-12 VDC @ 3 mA Max
5 line, TTL Data Bus
0.0 to 0.8V @ 1
碌A(chǔ)
Max
2.4 to 5.0V @ 1
碌A(chǔ)
Max
+15V
C1
GND GND GND GND -12V
C2
C3
C4
C5
Truth Table
Control Input
C1
0
1
0
0
0
0
C2
C3
C4
0
0
0
0
0
0
1
0
0
0
1
0
0
0
1
0
0
0
Any Combination
"1" = Logic High (TTL)
C5
0
0
0
0
0
1
Attenuator Setting
REFERENCE
1 dB
2 dB
4 dB
8 dB
16 dB
Sum of Bits Selected
"0" = Logic Low (TTL)
1. All specifications apply when operated with bias voltages of +15 VDC and -12VDC
and a 50 ohm impedance at both RF ports.
2. Above reference insertion loss.
3. Contact the factory for standard or custom screening requirements.
Ordering Information
Model No.
AT-357 SMA
Package
Connectorized
Speci鏗乧ations Subject to Change Without Notice.
M/A-COM, Inc.
North America:
Tel. (800) 366-2266
Fax (800) 618-8883
s
1
Asia/Paci鏗乧: Tel. +81 (03) 3226-1671
Fax +81 (03) 3226-1451
s
Europe: Tel. +44 (1344) 869 595
Fax +44 (1344) 300 020
1
2
