MACOM AT90-0263TR, AT90-0263-TB, AT90-0263 Datasheet

Digital Attenuator, 31 dB, 5-Bit,
TTL Driver, DC-4.0 GHz

V 6.00

AT90-0263

Features

n Attenuation: 1.0dB Steps to 31dB
n Low DC Power Consumption
n Small Footprint, JEDEC 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 AT90-0263 is a GaAs FET 5-bit digital
attenuator with integral TTL driver. Step size is 1.0 dB
providing 31dB total attenuation range. This device is in a
FQFP-N plastic surface mount package. The AT90-0263 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 — DC - 4.0 GHz dB — 3.6 4.0

Attenuation

Accuracy

VSWR Full Range DC - 4.0 GHz Ratio — 2.0:1 2.2:1

Switching Speed

1 dB Compression —

Input IP

3

+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,

-Iee -Vee min to max,

Individual Bits 1-2-4-8-16 dB

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

1 to 31 dB

—

—
—

Logic “0” or “1”

Logic “0” or “1”

DC - 3.0 GHz
DC - 4.0 GHz
DC - 4.0 GHz

—
—

50 MHz

0.5 - 4.0 GHz

0.5-4.0 GHz
—

—

— mA — 0.2 6

— mA — -0.2 -1

dB
dB
dB

nS
nS

dBm
dBm

dB
dB

V
V

—
—
—

—
—

—
—

—
—

4.75

-8.0

—
—
—

75
20

+21
+29

+35
+48

5.0

-5.0

±(.3 +5% of atten setting)
±(.4 +6% of atten setting)
±(.5 +7% of atten setting)

150

50
—

—
—

—

5.25

-4.75

Digital Attenuator, 31 dB, 5-Bit, TTL Driver, DC - 4.0 GHz

AT90-0263

V 6.00

Pin Configuration

Pin # Function Pin # Function

1 GND 17 NC
2 C16 18 NC

3 C8 19 NC
4 C4 20 NC
5 C2 21 NC
6 C1 22 NC
7 GND 23 NC

8 NC 24 NC

9 NC 25 NC
10 NC1 26 GND
11 GND 27 RF2
12 RF1 28 GND
13 GND 29 NC1
14 NC 30 -Vee
15 NC 31 NC
16 NC 32 +Vcc

1. Pins 10 & 29 must be isolated

Absolute Maximum Ratings 3

Recommended PCB Layout 2

2. Application Note C2083 is available on line at
www.macom.com

Truth Table

Parameter Absolute Maximum

Max. Input Power

0.05 GHz

0.5 - 4.0 GHz
+Vcc +5.5V

-Vee -8.5V

Logic Voltages 4 -0.5 to +Vcc + 0.5V

Operating Temperature -40°C to +85°C

Storage Temperature -65°C to +125°C

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

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

+27 dBm
+34 dBm

C16 C8 C4 C2 C1 Attenuation

0 0 0 0 0 Loss, Reference
0 0 0 0 1 1.0 dB
0 0 0 1 0 2.0 dB
0 0 1 0 0 4.0 dB
0 1 0 0 0 8.0 dB
1 0 0 0 0 16.0 dB
1 1 1 1 1 31.0 dB

0 = TTL Low; 1 = TTL High

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.

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