MACOM AT65-0283TR, AT65-0283-TB Datasheet

Digital Attenuator, 15.5 dB, 5-Bit,
TTL Driver, DC - 2.0 GHz

V 6.00

AT65-0283

Features

n Attenuation: 0.5 dB Steps to 15.5 dB
n Low DC Power Consumption
n Plastic SOIC, Wide Body, SMT Package
n Integral TTL Driver
n 50 ohm Impedance
n Test Boards are Available
n Tape and Reel Packaging Available

Description

M/A-COM's AT65-0283 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 a SOIC-16 plastic surface mount package. The
AT65-0283 is ideally suited for use where accuracy, fast
speed, very low power consumption and low costs are
required.

SOW-16

Package outline conforms to JEDEC standard MS-013AA.

Electrical Specifications: TA = 25°C

Parameter Test Conditions Frequency Units Min Typical Max

Insertion Loss — DC - 1.0 GHz

Attenuation Accuracy Any Bit

VSWR Full Range DC - 2.0 GHz Ratio — 1.5:1 1.8:1

Switching Speed

1 dB Compression —

Input IP

Vcc

-Vee

Logic “0” Sink Current is 20 µA max. — V 0.0 — 0.8
Logic “1” Source Current is 20 µA max. — V 2.0 — 5.0

Icc Vcc min to max, Logic “0” or “1” — mA — 0.2 6

-Iee -Iee min to max, Logic “0” or “1” — mA — -0.2 -1

1

3

Any Combination of Bits

50% Cntl to 90%/10% RF

10% to 90% or 90% to 10%

—

Two-tone inputs up to +5 dBm 50 MHz

—
—

DC - 2.0 GHz
DC - 2.0 GHz

DC -2.0 GHz

—
—

50 MHz

0.5 - 2.0 GHz

0.5-2.0 GHz
—

—

dB
dB

dB
dB

nS
nS

dBm
dBm

dB
dB

V
V

—
—

—
—

—
—

—
—

—
—

4.75

-8.0

2.0

2.3
—

—

75
20

+21
+29

+35
+48

5.0

-5.0

2.5

2.7

±(.3 +4% of atten)

± (.3 +6% of atten)

150

50

—
—

—
—

5.25

-4.75

1. Decoupling capacitors (.01 µF) are required on power supply lines.

Digital Attenuator, 15.5 dB, 5-Bit, TTL Driver, DC - 2.0 GHz

AT65-0283

V 6.00

Pin Configuration

Pin # Function Pin # Function

1 RF 9 C8
2 GND 10 Vcc
3 GND 11 Vee
4 GND 12 C4
5 GND 13 C2
6 GND 14 C1
7 GND 15 C0.5
8 RF 16 GND

Truth Table

C8 C4 C2 C1 C0.5 Attenuation

0 0 0 0 0 Loss, Reference
0 0 0 0 1 0.5 dB
0 0 0 1 0 1.0 dB
0 0 1 0 0 2.0 dB
0 1 0 0 0 4.0 dB
1 0 0 0 0 8.0 dB
1 1 1 1 1 15.5 dB

Absolute Maximum Ratings

2

Parameter Absolute Maximum

Max. Input Power

0.05 GHz

0.5 - 2.0 GHz

+27 dBm
+34 dBm

+Vcc +5.5V

-Vee -8.5V

Logic Voltages 3 -0.5 to Vcc + 0.5V

Operating Temperature -40°C to +85°C

Storage Temperature -65°C to +125°C

2. Operation of this device above any one of these
parameters may cause permanent damange.

3. Standard CMOS TTL interface, latch-up will occur if logic
signal is applied prior to power supply.

Typical Performance Curves

Insertion Loss

2.50

2.00

1.50

Insertion Loss (dB)

0 = TTL Low; 1 = TTL High

4 dB Bit0.5, 1, 2 dB Bits

0.4

0.3

0.2

0.1

0.0

Deviation (dB)

-0.1

-0.2
0 500 1000 1500 2000

Frequency (MHz)

Specifications subject to change without notice.

n North America: Tel. [phone]
n Asia/Pacific: Tel.[phone], Fax [phone]
n Europe: Tel. [phone], Fax[phone]

Visit www.macom.com for additional data sheets and product information.

1.00
0 500 1000 1500 2000

Frequency (MHz)

Attenuation Accuracy Attenuation Accuracy

8 dB

1.0

0.8

0.6

0.4

0.2

Deviation (dB)

0.0

-0.2
0 500 1000 1500 2000

Frequency (MHz)

Max. Attenuation

2