MACOM AT65-0009TR, AT65-0009-TB, AT65-0009 Datasheet

Voltage Variable Attenuator
824 - 960 MHz

V 1.00

AT65-0009

Features

n 25 dB Attenuation Range
n High IP3
n Excellent Linearity Performance
n Surface Mount SOT-25 Package
n Low Cost/High Performance
n 50 Ohm Nominal Impedance

SOT-25

Description

M/A-COM’s AT65-0009 is an integrated assembly contain­ing two PIN diodes and a passive glass quadrature hybrid.
This device is packaged in a 5 leaded SOT plastic surface
mount package. The diodes are biased to +3.5V for maxi­mum attenuation using the suggested Bias Circuit. The
AT65-0009 is ideally suited for GSM communication appli­cations requiring variable attenuation in the 824 to 960
MHz bandwidth.

Electrical Specifications: TA = 25°C, Z0 = 50Ω

Parameter Test Conditions Units Min. Typ. Max.

Insertion Loss VB = 0V dB — 1.7 2.1

VSWR Ratio — 1.7 2.2

Attenuation Flatness vs.

Frequency

Switching Speed 50% control to 90%/10% RF µSec — 5.0 7.0

Input IP3 Two Tones 900 MHz, 905 MHz, +5 dBm

Input IP2 Two Tones 900 MHz, 905 MHz, +5 dBm

Attenuation VB = 3.7V dB 25 28 —

0 - 10 dB
0 - 20 dB
0 - 30 dB

VB = 0V

VB = 0V

dB
dB
dB

dB — 40 —

dB — 34 —

—
—
—

0.5

0.5

1.0

1.3

1.3

2.5

Voltage Variable Attenuator, 824 - 960 MHz

AT65-0009

V 1.00

Pin Configuration

Pin # Function

1 RFIN VB
2 GND
3 RFOUT VB
4 GND
5 GND

Functional Diagram and
Bias Circuitry

GND

PIN 1

C5

C1 C2

RF IN RF OUT

GND

L1

C3

L2

C4

R1

V

B

External Circuitry Parts 4

GND

PIN 3

Recommended PCB Configuration

1. Circuit Material = FR-4, TETRA II, 0.031 inches thick.

2. Line Width = 0.025 inches, Line Spacing = 0.0056
inches.

Absolute Maximum Ratings 3

Parameter

C6

Max Input Power +27 dBm

Operating Voltage +5 V

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 damage.

Absolute Maximum

Part Value Purpose

C1 390 pF DC Block
C2 390 pF DC Block
C3 390 pF By-pass
C4 390 pF By-pass

L1 180 nH RF Choke
L2 180 nH RF Choke

R1 10 kOhm Current Limiting
C55 1.5 pF RF Tune
C65 1.5 pF RF Tune

4. All external circuitry parts are readily available, low cost
surface mount components (.060 in. x .030 in or .080 in
x .050 in.).

5. See Application Note MA-C-05010008A for external tuning
capacitor values to suit specific Communication Bandwidths.

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.

Ordering Information

Part Number Package

AT65-0009 Bulk Packaging

AT65-0009TR Tape and Reel (1K Reel)

AT65-0009-TB Units Mounted on Test Board

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