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Электронный компонент: AT-233

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Digital Attenuator, 30 dB, 4-Bit,
TTL Driver, DC - 2 GHz
AT
-
233
CR-12
V 3.00
Features
n
Attenuation: 2 dB Steps to 30 dB
2
n
Temperature Stability: 0.18 dB from 55C to +85C
Typical
n
Low DC Power Consumption
n
Hermetic Surface Mount Package
n
Integral TTL Driver
n
50 Ohm Nominal Impedance
Description
M/A-COM's AT-233 is a GaAs FET 4-Bit digital
attenuator with a 2 dB minimum step size and 30 dB total
attenuation. This attenuator and integral TTL driver is in a
hermetically sealed ceramic 16-lead surface mount package.
The AT-233 is ideally suited for use where accuracy, fast
switching, very low power consumption and low
intermodulation products are required. Typical applications
include dynamic range setting in precision receiver circuits
and other gain/leveling control circuits. Environmental
screening is available. Contact the factory for information.
Electrical Specifications: T
A
= 25C
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
--
--
--
--
--
--
2.3
2.65
2.8
Attenuation Accuracy
3
Any Single Bit

Any Combination of Bits
DC - 1.0 GHz
DC - 2.0 GHz
DC - 1.0 GHz
DC - 2.0 GHz
(0.2 + 3% of attenuation setting in dB) dB
(0.2 + 3% of attenuation setting in dB) dB
or 0.45 dB, whichever is greater
(0.20 + 3% of attenuation setting in dB) dB
(0.25 + 4% of attenuation setting in dB) dB
or 0.45 dB, whichever is greater
VSWR
DC - 2.0 GHz
Ratio
--
--
1.7:1
Trise, Tfall
10% to 90%
--
ns
--
10
--
Ton, Toff
50% Control to 90/10% RF
--
ns
--
30
--
Transients
In-Band (peak-peak)
--
mV
--
35
--
1 dB Compression
4
Input Power
0.05 GHz
0.5 - 2.0 GHz
dBm
dBm
--
--
+20
+28
--
--
Input IP3
4
For two tone input power
Up to +5 dBm
0.05 GHz
0.5 - 2.0 GHz
dBm
dBm
--
--
+40
+50
--
--
Input IP2
4
For two-tone input power
Up to +5 dBm
0.05 GHz
0.5 - 2.0 GHz
dBm
dBm
--
--
+45
+68
--
--
1. All specifications apply when operated with bias voltages of +5V or V
CC
and 5.0V to 8.0V for V
EE
, and 50 Ohm impedance at
all ports unless otherwise specified.
2. Above reference insertion loss.
3. This attenuator is guaranteed monotonic.
4. V
EE
= -5V for the typical numbers given.
Digital Attenuator, 30 dB, 4-Bit, TTL Driver, DC - 2 GHz
AT-233
Specifications subject to change without notice.
n
North America: Tel. (800) 366-2266
n
Asia/Pacific: Tel.+81-44-844-8296, Fax +81-44-844-8298
n
Europe: Tel. +44 (1344) 869 595, Fax+44 (1344) 300 020
Visit www.macom.com for additional data sheets and product information.
V 3.00
2
Functional Schematic (Top View)
Absolute Maximum Ratings
5
5. Operation of this device above any one of these
parameters may cause permanent damage.
Parameter
Absolute Maximum
Max Input Power
0.5 GHz
0.5 - 2.0 GHz
+27 dBm
+34 dBm
Supply Voltages
V
CC
V
EE
+5.5V
-8.5V
Control Voltage
-0.5V to V
CC
+ 0.5V
Operating Temperature
-55C to +125C
Storage Temperature
-65C to +150C
Parameter
Test Conditions
Frequency
Units
Min
Typ
Max
V
CC
--
V
4.5
5.0
5.5
V
EE
--
V
-8.0
--
-5.0
I
CC
V
CC
= 4.5 to 5.5 V
Vctl = 0 to 0.8V, or V
CC
2.1V to V
CC
--
mA
--
--
4.0
I
EE
V
EE
= -5.0 to 8.0V
--
mA
--
--
1.0
Vctl
Logic 0 (TTL)
Logic 1 (TTL)
--
--
V
V
0.0
2.0
--
--
0.8
5.0
Input Leakage Current (Low)
Input Leakage Current (High)
0 to 0.8V
2.0 to 5.0V
--
--
A
A
--
--
--
--
1.0
1.0
Electrical Specifications: T
A
= 25C
1
Truth Table
C4
C3
C2
C1
Attenuation
0
0
0
0
Reference
0
0
0
1
2 dB
0
0
1
0
4 dB
0
1
0
0
8 dB
1
0
0
0
16 dB
1
1
1
1
30 dB
Control Inputs
0 = TTL Low 1 = TTL High
NC
+5V
-5V
C4
C3
C2
C1
GND
RF2
GND
GND
GND
GND
GND
GND
RF1
PIN 1
PIN 16
16 dB
8 dB
4 dB
2 dB
Digital Attenuator, 30 dB, 4-Bit, TTL Driver, DC - 2 GHz
AT-233
Specifications subject to change without notice.
n
North America: Tel. (800) 366-2266
n
Asia/Pacific: Tel.+81-44-844-8296, Fax +81-44-844-8298
n
Europe: Tel. +44 (1344) 869 595, Fax+44 (1344) 300 020
Visit www.macom.com for additional data sheets and product information.
V 3.00
Typical Performance Curves
VSWR vs. Frequency
Ref. Insertion Loss vs. Frequency
Attenuation Accuracy vs. Frequency
3
Ordering Information
6
Part Number
Package
AT-233 PIN
CR-12
6. Contact the factory for standard or custom screening
requirements
0.0
1.0
2.0
3.0
4.0
5.0
0.0
0.5
1.0
1.5
2.0
Frequency (GHz)
Insertion Loss (dB)
+85C
+25C
-55C
-2.0
-1.5
-1.0
-0.5
0.0
0.5
1.0
0.0
0.5
1.0
1.5
2.0
Frequency (GHz)
Deviation from Nominal
Attenuation (dB)
2 dB
4 dB
8 dB
16 dB
Full Atten
1.00
1.20
1.40
1.60
1.80
2.00
0.0
0.5
1.0
1.5
2.0
Frequency (GHz)
VSWR
2 dB
4 dB
8 dB 16 dB Ref Loss State