Alpha Industries, Inc. [781] 935-5150

• Fax [617] 824-4579 • Email sales@alphaind.com • www.alphaind.com

1

Specifications subject to change without notice. 12/00A

GaAs IC 5 Bit Digital Attenuator

1 dB LSB DC–2 GHz

Features

s Attenuation 1.0 dB Steps to 31 dB

with High Accuracy

s Low DC Power Consumption

s Low Cost SSOP-20 Plastic Package

SSOP-20

AA260-85

(Previously AD260-85)*

0.012

(0.30 mm)

REF.

0.0256

(0.65 mm)

BSC

0.069

(1.75 mm)

±0.004

(0.10 mm)

0.008 (0.20 mm) MAX.

0.002 (0.05 mm) MIN.

0.010 (0.25 mm)

0.004 (0.090 mm)

8˚ MAX.

0.030 (0.75 mm)

±0.008 (0.10 mm)

0.078

(2.00 mm)

MAX.

0.283 (7.20 mm)

±0.012 (0.30 mm)

PIN 20

PIN 1

0.209 (5.30 mm)

±0.012 (0.30 mm)

0.307 (7.80 mm)

±0.016 (0.307 mm)

PIN 1

INDICATOR

Description

The AA260-85 is a 5 bit, GaAs IC FET digital attenuator

in a low cost SSOP-20 package. This attenuator has an

LSB of 1 dB and a total attenuation of 31 dB. The

AA260-85 is particularly suited where high attenuation

accuracy, low insertion loss and low intermodulation

products are required. Typical applications include

cellular radio, wireless data, wireless local loop and other

gain level control circuits.

Condition

Min.

Typ.

Max.

Unit

Insertion Loss

DC–0.5 GHz

1.4

1.7

dB

DC–1.0 GHz

1.6

2.0

dB

DC–2.0 GHz

2.0

2.3

dB

Attenuation Range

31

dB

DC–1.0 GHz

± (0.2 + 3% of

Attenuation Setting in dB)

dB

DC–1.8 GHz

± (0.4 + 5% of

Attenuation Setting in dB)

dB

DC–2.0 GHz

± (0.5 + 6% of

Attenuation Setting in dB)

dB

VSWR (I/O)

DC–2.0 GHz

1.4:1

1.7:1

Rise, Fall (10/90% or 90%/10% RF)

15

nS

On, Off (50% CTL to 90%/10% RF)

25

nS

Video Feedthru

25

mV

Input Power for 1 dB Compression

0.5–2.0 GHz

+25

+29

dBm

0.05 GHz

+18

+22

dBm

Intermodulation Intercept Point (IP3)

For Two-tone Input Power +5 dBm

0.5–2.0 GHz

+42

+48

dBm

0.05 GHz

+30

+36

dBm

Control Voltages

Electrical Specifications at -40°C to +85°C (0, -5 V)

1. All measurements made in a 50

Ω system, unless otherwise specified.

2. DC = 300 kHz.

3. Attenuation referenced to insertion loss.

4. Video feedthru measured with 1 ns risetime pulse and 500 MHz bandwidth.

*Due to conflict with another company’s product numbering system, Alpha’s attenuator products starting with the letters “AD” are being changed to “AA”.