Digital Attenuator, 30 dB, 4-Bit,
TTL Driver, DC-3.0 GHz
AT65
-
0233
SO-16
V 5.00
Electrical Specifications: T
A
= 25C
Features
n
Attenuation: 2.0 dB steps to 30 dB
n
Low DC Power Consumption
n
Integral TTL Driver
n
50 Ohm Impedance
n
Temperature Stability: 0.18 dB from -55C to +85C
Typ.
Description
M/A-COM's AT65-0233 is a GaAs FET 4-bit digital
attenuator with a 2.0 dB minimum step size and a 30 dB
total attenuation range. This device is in a SOIC-16 plastic
surface mount package. The AT65-0233 is ideally suited for
use where accuracy, fast speed, very low power
consumption and low costs are required. Typical
applications include dynamic range setting in precision
receiver circuits and other gain/leveling control circuits.
Parameter
Test Conditions
Frequency
Units
Min.
Typ.
Max.
Insertion Loss
--
DC - 0.5 GHz
DC - 2.0 GHz
DC - 3.0 GHz
dB
dB
dB
--
--
--
1.7
2.3
2.6
2.0
2.7
3.1
Attenuation Accuracy
Any Bit or Combination of Bits
DC - 3.0 GHz
dB
(.4 + 8% of attenuation)
VSWR
Full Range
DC - 3.0 GHz
Ratio
--
--
1.7:1
Trise, Tfall
Ton, Toff
Transients
nS
nS
mV
--
--
--
10
30
35
50
150
--
1 dB Compression
Input Power
Input Power
0.05 GHz
0.5 - 3.0 GHz
dBm
dBm
--
--
+20
+28
--
--
Input IP
3
Two-tone inputs up to +5 dBm
0.05 GHz
0.5 - 3.0 GHz
dBm
dBm
--
--
+40
+50
--
--
Input IP
2
Two-tone inputs up to +5 dBm
0.05 GHz
0.5 - 3.0 GHz
dBm
dBm
--
--
+45
+68
--
--
10% to 90%
50% Cntl to 90%/10% RF
In-Band
V
CC
-V
EE
--
--
--
--
V
V
4.5
-8.0
5.0
-5.0
5.5
-4.75
Vctl
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 0.8 V
2.0 to 5.0 V
--
--
A
A
--
--
--
--
20
20
Icc
V
CC
= 4.5 to 5.5 V
--
mA
--
--
4.0
-Iee
V
EE
= -5.0 to 8.0 V
--
mA
--
--
-1
Digital Attenuator, 30 dB, 4-Bit, TTL Driver, DC - 3.0 GHz
AT65-0233
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 5.00
2
Pin Configuration
Pin #
Function
Pin #
Function
1
GND
9
C2
2
RF1
10
C1
3
GND
11
GND
4
N/C
12
GND
5
Vee
13
N/C
6
Vcc
14
GND
7
C4
15
RF2
8
C3
16
GND
N/C = No Connection
Absolute Maximum Ratings
1
Parameter
Absolute Maximum
Max. Input Power
0.05 GHz
0.5 - 3.0 GHz
+27 dBm
+34 dBm
+Vcc
+5.5V
-Vee
-8.5V
Control Voltage
2
-0.5 to Vcc + 0.5V
Operating Temperature
-40C to +85C
Storage Temperature
-65C to +125C
1. Operation of this device above any one of these
parameters may cause permanent damage.
2. Standard CMOS TTL interface, latch-up will occur if logic
signal is applied prior to power supply.
Truth Table
C1
C2
C3
C4
Attenuation
0
0
0
0
Loss, Reference
1
0
0
0
2.0 dB
0
1
0
0
4.0 dB
0
0
1
0
8.0 dB
0
0
0
1
16.0 dB
1
1
1
1
30.0 dB
0 = TTL Low; 1 = TTL High
Typical Performance Curves
Attenuation Accuracy, 4 dB
Attenuation Accuracy, 2 dB
Typical Insertion Loss (dB)
0
1
2
3
0
0.5
1
1.5
2
2.5
3
Frequency (GHz)
Loss (dB)
-0.6
-0.4
-0.2
0
0.2
0.4
0.6
0
0.5
1
1.5
2
2.5
3
Frequency (GHz)
Deviation from Nom. Atten. (dB)
-0.6
-0.4
-0.2
0
0.2
0.4
0.6
0
0.5
1
1.5
2
2.5
3
Frequency (GHz)
Deviation from Nom. Atten. (dB)
Digital Attenuator, 30 dB, 4-Bit, TTL Driver, DC - 3.0 GHz
AT65-0233
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 5.00
Typical Performance Curves
Attenuation Accuracy, 16 dB
Attenuation Accuracy, 8 dB
Attenuation Accuracy, 30 dB
3
Typical RF1 VSWR
Typical RF2 VSWR
Ordering Information
Part Number
Package
AT65-0233
SOIC-16 Lead Plastic
AT65-0233TR
Tape and Reel (1K Reel)
AT65-0233-TB
Unit mounted on a test board
1
1.1
1.2
1.3
1.4
0
0.5
1
1.5
2
2.5
3
Frequency (GHz)
VSWR
2 & 4 dB
Insertion Loss
8 dB
16 & 30 dB
1
1.1
1.2
1.3
1.4
0
0.5
1
1.5
2
2.5
3
Frequency (GHz)
VSWR
Insertion Loss
16 dB
30 dB
2, 4, & 8 dB
-2.4
-2
-1.6
-1.2
-0.8
-0.4
0
0.4
0.8
0
0.5
1
1.5
2
2.5
3
Frequency (GHz)
Deviation from Nom. Atten. (dB)
-0.4
-0.2
0
0.2
0.4
0
0.5
1
1.5
2
2.5
3
Frequency (GHz)
Deviation from Nom. Atten. (dB)
-0.8
-0.4
0
0.4
0.8
0
0.5
1
1.5
2
2.5
3
Frequency (GHz)
Deviation from Nom. Atten. (dB)
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