AT90-1283 Tyco Electronics, AT90-1283 Datasheet

AT90-1283

Manufacturer Part Number

AT90-1283

Description

Digital Attenuator, 15.5 Db, 5-bit, Ttl Driver, Dc-3.5 Ghz

Manufacturer

Tyco Electronics

Datasheet

1.AT90-1283.pdf (5 pages)

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Download datasheet (124Kb)

Digital Attenuator, 15.5 dB, 5-Bit,

TTL Driver, DC-3.5 GHz

Features

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.

For dual supply designs without switching noise, use

AT90-0283.

Electrical Specifications T

1. During turn-on, the device requires an initial start up current (Icc) specified as “Turn-on Current”. Once operational, Icc will drop

2. The DC-DC converter is guaranteed to start in 100 µs as long as the power supplies have the maximum turn-on current

Thermal Resistance

1 dB Compression

Turn-on Current

Switching Speed

Switching Noise

to the specified levels.

available for start-up.

Insertion Loss

Attenuation: 0.5 dB Steps to 15.5 dB

Single Positive Supply

Contains Internal DC to DC Converter

Low DC Power Consumption

Small Footprint, JEDEC Package

Integral TTL Driver

50 ohm Impedance

Parameter

Attenuation

Accuracy

Input IP

Logic “0”

Logic “1”

VSWR

+Vcc

Icc

θjc

Two-tone inputs up to +5 dBm

Source Current is 20 µA max.

Vcc min to max, Logic “0” or

10% to 90% or 90% to 10%

Sink Current is 20 µA max.

Individual Bits 0.5-1-4-8 dB

50% Cntl to 90%/10% RF

recommended capacitors

For guaranteed start-up

Any Combination of Bits

DC-DC Converter with

Test Conditions

Individual Bit 2 dB

Generated from

1 to 15.5 dB

Full Range

“1”

—

= +25°C

DC - 3.5 GHz

0.5 - 3.5 GHz

Frequency

0.5-3.5 GHz

3.5 MHz

50 MHz

—

CSP-1

Units

Ratio

°C/W

dBm

Min

4.75

0.0

2.0

—

Typical

1.6:1

+21

+29

+35

+48

2.8

5.0

-93

—

±(.4 +10% of atten setting)

±(.3 +5% of atten setting)

±(.5 +7% of atten setting)

1.8:1

Max

5.25

150

125

3.2

0.8

5.0

—

V 9.00

Related parts for AT90-1283

AT90-1283 Summary of contents

Page 1

... 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 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 ...

Page 2

... CMOS TTL interface, latch-up will occur if logic signal is applied prior to power supply. 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 AT90-1283 V 9. +27 dBm +34 dBm +5.5V 2 ...

Page 3

... Frequency (MHz) Attenuation Error Bit 1.0 0.5 0.0 -0.5 0 500 1000 1500 2000 2500 Frequency (MHz) 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 AT90-1283 V 9.00 Output 3000 3500 3000 3500 3000 3500 3 ...

Page 4

... Frequency (MHz) VSWR Bit Input 1.6 1.4 1.2 1.0 0 500 1000 1500 2000 2500 Frequency (MHz) 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 AT90-1283 V 9.00 3000 3500 Output 3000 3500 Output 3000 3500 4 ...

Page 5

... Tape and Reel (1K Reel) AT90-1283-TB Units Mounted on Test Board Note: Reference Application Note M513 for reel size information. 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 AT90-1283 V 9.00 Output 3000 3500 5 ...

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