MACOM AT90-0001TR, AT90-0001-TB, AT90-0001 Datasheet

Digital Attenuator, 31.0 dB, 5-Bit,
TTL Driver, DC-6.0 GHz

V 5.00

AT90-0001

Features

n Attenuation: 1.0 dB Steps to 31 dB
n High Accuracy to 6 GHz
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 AT90-0001 is a GaAs FET 5-bit digital at­tenuator with an integral TTL driver. Step size is 1.0 dB
providing 31 dB total attenuation range. This device is in a
32 lead FQFP-N surface mount package. Due to superior
grounding techniques this digital attenuator offers superior
performance to 6 GHz. The AT90-0001 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 - 2.0 GHz

Attenuation

Accuracy

VSWR Full Range DC - 2.0 GHz

1 dB Compression —

Input IP2 Two tone inputs to +5 dBm 50 MHz

Input IP3

Switching Speed 50% Cntl to 90%/10% RF

Logic "0"
Logic "1"

Vcc

-Vee

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

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

1 to 24 dB Bits

25 to 31 dB Bits

—

Two-tone inputs up to +5 dBm 50 MHz

—
—

10% to 90% or 90% to 10%

Sink Current is 20 µA Max.

Source Current is 20 µA Max.

DC - 4.0 GHz
DC - 6.0 GHz

DC - 6.0 GHz
DC - 6.0 GHz

DC - 6.0 GHz

50 MHz

0.5 - 6.0 GHz

0.5 - 6.0 GHz

0.5-6.0 GHz
—

—
—

—
—

—

dB
dB
dB

dB
dB

Ratio
Ratio

dBm
dBm

dBm
dBm

dB
dB

V
V

nS
nS

V
V

—
—
—

—
—

—
—

—
—

—
—

—
—

4.75

-8.0
—

—

0.0

2.0

2.5

3.3

5.0
—

—

1.4:1

1.7:1
+22

+28
+43

+60
+37

+48

5.0

-5.0

25
15

-

-

±(0.3 +4% of atten.)
±(0.3 +5% of atten.)

3.1

3.8

5.8

1.7:1

2.4:1
—

—
—

—
—

—

5.25

-4.75
—

—

0.8

5.0

Digital Attenuator, 31.0 dB, 5-Bit, TTL Driver, DC - 6.0 GHz

AT90-0001

V 5.00

Absolute Maximum Ratings 1

Parameter Absolute Maximum

Max. Input Power

0.05 GHz

0.5 - 6.0 GHz
+Vcc +5.5V

-Vee -8.5V

Logic Voltages

Operating Temperature -40°C to +85°C

Storage Temperature -65°C to +125°C

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

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

2

-0.5 to Vcc + 0.5V

+27 dBm
+34 dBm

Pin Configuration

Pin # Function Pin # Function

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

Truth Table

C16 C8 C4 C2 C1 Attenuation

0 0 0 0 0 Loss, Reference
0 0 0 0 1 1 dB
0 0 0 1 0 2 dB
0 0 1 0 0 4 dB
0 1 0 0 0 8 dB
1 0 0 0 0 16 dB
1 1 1 1 1 31 dB

0 = TTL Low; 1 = TTL High

Recommended PCB Layout 3

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

NC = No Connection

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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