MACOM AT90-1106-TB, AT90-1106, AT90-1106TR Datasheet

Digital Attenuator, 50 dB, 6-Bit,
TTL Driver, DC-2.4 GHz

V 5.00

AT90-1106

Features

n Attenuation: 1 dB Steps to 50 dB
n Single Positive Supply
n Contains Internal DC to DC Converter
n Low DC Power Consumption
n Small Footprint, JEDEC Package
n Integral TTL Driver
n 50 ohm Impedance

Description

M/A-COM's AT90-1106 is a GaAs FET 6-bit digital
attenuator with integral TTL driver. Step size is 1 dB pro­viding a 50 dB total attenuation range. This device is in a
FQFP-N plastic surface mount package. The AT90-1106 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 - 2.4 GHz dB — 5.5 6.0

Attenuation

Accuracy

VSWR Full Range DC - 2.4 GHz Ratio — 1.8:1 2:1

Switching Speed

1 dB Compression —

Input IP

+Vcc — — V 4.75 5.0 5.25

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,

Individual Bits 1-2-4-8-16-32 dB

Any Combination of Bits

1 to 50 dB

50% Cntl to 90%/10% RF

10% to 90% or 90% to 10%

3

Two-tone inputs up to +5 dBm 50 MHz

Logic “0” or “1”

—

DC - 2.4 GHz
DC - 2.4 GHz

—
—

50 MHz

0.5 - 2.40 GHz

0.5-2.4 GHz

— mA — 6 10

dB
dB

nS
nS

dBm
dBm — —

dB
dB

—
—

—
—

—
—

— — ±(.3 +5% of atten setting)

75
20

+21
+29

+35
+48

±(.5 +8% of atten setting)

150

50
—

—
—

—

Digital Attenuator, 50 dB, 6-Bit, TTL Driver, DC - 2.4 GHz

AT90-1106

V 5.00

Pin Configuration

Pin # Function Pin # Function

1 C16 17 NC
2 C8 18 NC

3 C4 19 +Vcc2
4 C2 20 NC
5 C1 21 Cp4
6 C32 22 NC
7 GND 23 Cp4

8 NC 24 NC

9 NC 25 -Vee3
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

2. Pin 19 must be connected to Pin 32

3. Pin 25 must be connected to Pin 30

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

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

6. +Vcc requires a .1µF cap to GND

3,5

2,6

Recommended PCB Layout 7

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

Absolute Maximum Ratings 8

Truth Table

C32 C16 C8 C4 C2 C1 Attenuation

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

0 0 0 0 1 0 2.0 dB
0 0 0 1 0 0 4.0 dB
0 0 1 0 0 0 8.0 dB
0 1 0 0 0 0 16.0 dB
1 0 0 0 0 0 32.0 dB
1 1 0 0 1 0 50.0 dB

0 = TTL Low; 1 = TTL High

Parameter Absolute Maximum

Max. Input Power

0.05 GHz

0.5 - 2.4 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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