Alpha Industries, Inc. [781] 935-5150

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1

Specifications subject to change without notice. 3/01A

GaAs IC 5 Bit Digital Attenuator With

Serial-to-Parallel Driver 0.5–2.5 GHz

Features

I Positive Voltage Operation (+5 V)

I MLF 5 x 5 mm Leadless Package

I Integrated Silicon Serial-to-Parallel Driver

I Attenuation 1 dB Steps to 31 dB

MLF 5 x 5 (-310)

AA109-310

Description

The AA109-310 is a GaAs FET IC 5 bit digital attenuator

with a serial-to-parallel driver packaged in a 32 leadless

exposed pad plastic package. It is particularly suited where

high attenuation accuracy, low insertion loss and low

intermodulation products are required. Typical applications

include base station, wireless and wireless local loop gain

control circuits.

Condition

Frequency

Min.

Typ.

Max.

Unit

0.5–1.0 GHz

2.0

2.4

dB

1.0–2.0 GHz

2.7

3.1

dB

2.0–2.5 GHz

3.1

3.6

dB

15.5

dB

0.5–1.0 GHz

± (0.2 + 3% of

Attenuation Setting in dB)

dB

1.0–2.0 GHz

± (0.3 + 5% of

Attenuation Setting in dB)

dB

2.0–2.5 GHz

± (0.3 + 6% of

Attenuation Setting in dB)

dB

VSWR (I/O)

0.5–2.5 GHz

1.5:1

2.2:1

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

100

µs

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

300

µs

Video Feedthru

70

mV

Input Power for 1 dB Compression

0.9–2.5 GHz

+21

dBm

0.9–2.5 GHz

+27

dBm

Intermodulation Intercept Point (IP3)

For Two-tone Input Power +5 dBm

0.9–2.5 GHz

+41

dBm

0.9–2.5 GHz

+45

dBm

0.001

(0.025 mm)

0.039 (1.00 mm) MAX.

SEATING

PLANE

12˚ MAX.

0.197 (5.00 mm) BSC

0.197

(5.00 mm)

BSC

1

32

0.187

(4.75 mm) BSC

0.187

(4.75 mm)

BSC

PIN 1

INDICATOR

0.122 (3.10 mm)

± 0.006 (0.15 mm)

0.122 (3.10 mm)

± 0.006 (0.15 mm)

32

1

0.138 (3.50 mm) REF.

0.138

(3.50 mm) REF.

0.019 (0.50 mm) BSC

Preliminary

Parameter

Symbol

Min.

Typ.

Max.

Unit

Input Voltage High

3.5

5.0

V

Input Voltage Low

0

0.5

V

Input Leakage Current

±0.5

µA

Quiescent Current

500

µA

Supply Voltages

5.0

V

DC Electrical Characteristics at 25°C (0, +5 V)

1. All measurements made in a 50

Ω system, unless otherwise specified.

2. Insertion loss changes by 0.003 dB/°C.

3. Attenuation value referenced above insertion loss.

4. Exposed pad must be connected to RF ground to obtain specified attenuation.

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