MACOM AT90-1413TR, AT90-1413-TB, AT90-1413 Datasheet

Digital Attenuator, 15 dB, 4-Bit, TTL

V 1.00

Driver, DC - 4.0 GHz

AT90-1413

Features

n Attenuation: 1 dB Steps to 15 dB
n Single Positive Supply
n Contains Internal DC to DC Converter
n Small Footprint, JEDEC Package
n Integral TTL Driver
n 50 Ohm Impedance
n Test Boards Available
n Tape and Reel Packaging Available

Description

M/A-COM’s AT90-1413 is a GaAs FET 4-Bit digital
attenuator with integral driver. Step size is 1 dB providing
a 15 dB attenuation range. This device is in an FQFP-N
plastic surface mount package. The AT90-1413 is suited
for single supply applications where accuracy, fast speed,
low power consumption and low costs are required.

CSP-1

Electrical Specifications: TA = 25°C

Parameter Test Conditions Frequency Units Min. Typ. Max.

Insertion Loss — DC-2.5 GHz

Attenuation

Accuracy

VSWR Full Attenuation Range DC-2.5 GHz

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

1 dB Compression — 50 MHz

Input IP3 Two-tone Inputs up to +5 dBm 50 MHz

+Vcc — — V 4.75 5.0 5.25
Logic “0” Sink Current is 20 µA max. — V 0.0 — 0.8
Logic “1” Sink Current is 20 µA max. — V 2.0 — 5.0

Icc Vcc min to max, Logic “0” or “1” — mA — 6 10

Individual Bits or

Combination of Bits

10% to 90% or 90% to 10%

DC-4.0 GHz
DC-2.5 GHz

DC-4.0 GHz

DC-4.0 GHz

—
—

0.5-4.0 GHz

0.5-4.0 GHz

dB
dB

dB
dB

Ratio
Ratio

nS
nS

dB
dB

dB
dB

—
—

—
—

—
—

—
—

—
—

—
—

2.0

2.5
— — ±(0.3+4% of atten setting)

±(0.3+6% of atten setting)

1.5:1

1.8:1
75

20

+21
+29

+35
+48

2.5

3.0

1.8:1

2.0:1
150

50
—

—
—

—

Digital Attenuator, 15 dB, 4-Bit, TTL Driver, DC - 4.0 GHz

AT90-1413

V 1.00

Pin Configuration

Pin No. Function Pin No. Function

1 GND 17 N/C
2 C8 18 N/C
3 C4 19 +Vcc 2
4 C2 20 N/C
5 C1 21 Cp 4
6 GND 22 N/C
7 GND 23 Cp 4
8 N/C 24 N/C

9 N/C 25 -Vee 3
10 N/C1 26 GND
11 GND 27 RF2
12 RF1 28 GND
13 GND 29 N/C1
14 N/C 30 -Vee
15 N/C 31 N/C
16 N/C 32 +Vcc

1. Pins 10 & 29 must be isolated.

2. Pin 19 must be connected to Pin 32.

3. Pin 25 must connect to Pin 30.

4. A .01 µF cap must be connected between Pins 21 and 23.

5. -Vee is produced internally and requires a .1 µF cap to
GND

6. +Vcc requires a .1 µF cap to GND.

3,5

2,6

Truth Table

C8 C4 C2 C1 Attenuation

0 0 0 0 Loss, Reference
0 0 0 1 1.0 dB

0 0 1 0 2.0 dB
0 1 0 0 4.0 dB
1 0 0 0 8.0 dB
1 1 1 1 15.0 dB

0 = TTL Low; 1 = TTL High

Recommended PCB Layout 7

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

Absolute Maximum Ratings 8

Parameter Absolute Maximum

Max. Input Power

0.05 GHz

0.5 - 4.0 GHz

+Vcc +5.5V

Logic Voltages 9 -0.5 to +Vcc + 0.5V

Operating Temperature -40°C to +85°C

Storage Temperature -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.

+27 dBm
+34 dBm

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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