DC-3.5 GHz. AT90-1283 Datasheet

AT90-1283 Datasheet PDF, Equivalent


Part Number

AT90-1283

Description

Digital Attenuator/ 15.5 dB/ 5-Bit/ TTL Driver/ DC-3.5 GHz

Manufacture

Tyco Electronics

Total Page 5 Pages
PDF Download
Download AT90-1283 Datasheet


AT90-1283 Datasheet
Digital Attenuator, 15.5 dB, 5-Bit,
TTL Driver, DC-3.5 GHz
V 4.00
Features
n Attenuation: 0.5 dB Steps to 15.5 dB
n Single Positive Supply
n Contains Internal DC to DC Converter
n Low DC Power Consumption
n Small Footprint, JEDEC Package
n Integral TTL Driver
n 50 ohm Impedance
Description
M/A-COM's AT90-1283 is a GaAs FET 5-bit digital
attenuator with integral TTL driver. Step size is 0.5 dB
providing a 15.5 dB total attenuation range. This device is
in an FQFP-N plastic surface mount package. The AT90-
1283 is ideally suited for use where accuracy, fast speed,
very low power consumption and low costs are required.
CSP-1
Electrical Specifications TA = +25°C
Parameter
Test Conditions
Frequency Units Min Typical
Max
Insertion Loss
Attenuation
Accuracy
VSWR
Individual Bits 0.5-1-4-8 dB
Individual Bit 2 dB
Any Combination of Bits
1 to 15.5 dB
Full Range
DC - 3.5 GHz
DC - 3.5 GHz
DC - 3.5 GHz
DC - 3.5 GHz
dB
dB
dB
dB
DC - 3.5 GHz Ratio
Switching Speed
1 dB Compression
50% Cntl to 90%/10% RF
10% to 90% or 90% to 10%
50 MHz
0.5 - 3.5 GHz
nS
nS
dBm
dBm
Input IP3
+Vcc
Two-tone inputs up to +5 dBm
50 MHz
0.5-3.5 GHz
dB
dB
V
4.75
2.8
1.6:1
75
20
+21
+29
+35
+48
5.0
3.2
±(.3 +5% of atten setting)
±(.4 +10% of atten setting)
±(.5 +7% of atten setting)
1.8:1
150
50
5.25
Logic “0”
Logic “1”
Icc
Sink Current is 20 µA max.
Source Current is 20 µA max.
Vcc min to max, Logic “0” or
“1”
V 0.0
V 2.0
mA —
6
0.8
5.0
10

AT90-1283 Datasheet
Digital Attenuator, 15.5 dB, 5-Bit, TTL Driver, DC - 3.5 GHz
AT90-1283
V 4.00
Pin Configuration
Pin #
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Function
GND
C8
C4
C2
C1
C0.5
GND
NC
NC
NC1
GND
RF1
GND
NC
NC
NC
Pin #
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
Function
NC
NC
+Vcc2
NC
Cp4
NC
Cp4
NC
-Vee3,5
GND
RF2
GND
NC1
-Vee3,5
NC
+Vcc2,6
1. Pins 10 & 29 must be isolated
2. Pin 19 must be connected to Pin 32.
3. Pin 25 must be connected to Pin 30.
4. .01 µF cap must be between pins 21 & 23.
5. -Vee produced internally and requires a .1 µF cap to GND.
6. +Vcc requires a .1 µF cap to GND.
Recommended PCB Layout 7
7. Application Note C2083 is available on line at
www.macom.com
Truth Table
C8 C4 C2 C1
0 0 00
0 0 00
0 0 01
0 0 10
0 1 00
1 0 00
1 1 11
0 = TTL Low; 1 = TTL High
C0.5
0
1
0
0
0
0
1
Attenuation
Loss, Reference
0.5 dB
1.0 dB
2.0 dB
4.0 dB
8.0 dB
15.5 dB
Absolute Maximum Ratings 8
Parameter
Max. Input Power
0.05 GHz
0.5 - 3.5 GHz
+Vcc
Logic Voltages 9
Operating Temperature
Storage Temperature
Absolute Maximum
+27 dBm
+34 dBm
+5.5V
-0.5 to +Vcc + 0.5V
-40°C to +85°C
-65°C to +125°C
8. Operation of this device above any one of these
parameters may cause permanent damange.
9. Standard CMOS TTL interface, latch-up will occur if logic
signal is applied prior to power supply.
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.
2


Features Datasheet pdf Digital Attenuator, 15.5 dB, 5-Bit, TTL Driver, DC-3.5 GHz V 4.00 AT90-1283 Features n n n n n n n CSP-1 Attenuat ion: 0.5 dB Steps to 15.5 dB Single Pos itive Supply Contains Internal DC to DC Converter Low DC Power Consumption Sma ll Footprint, JEDEC Package Integral TT L Driver 50 ohm Impedance Description M/A-COM's AT90-1283 is a GaAs FET 5-bit digital attenuator with integral TTL d river. Step size is 0.5 dB providing a 15.5 dB total attenuation range. This d evice is in an FQFP-N plastic surface m ount package. The AT901283 is ideally s uited for use where accuracy, fast spee d, very low power consumption and low c osts are required. Electrical Specific ations TA = +25°C Parameter Insertion Loss Attenuation Accuracy Test Conditio ns — Individual Bits 0.5-1-4-8 dB Ind ividual Bit 2 dB Any Combination of Bit s 1 to 15.5 dB Full Range 50% Cntl to 9 0%/10% RF 10% to 90% or 90% to 10% — — Two-tone inputs up to +5 dBm — Si nk Current is 20 µA max. Source Current is 20 µA max. Vcc min to max, Lo.
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