Alpha Industries, Inc. [781] 935-5150

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

1

Specifications subject to change without notice. 3/01A

GaAs IC 5 Bit Digital Attenuator With

Serial-to-Parallel Driver DC–2 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 0.5 dB Steps to 15.5 dB

MLF 5 x 5 (-310)

AA107-310

Description

The AA107-310 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 at IF

frequencies where high attenuation accuracy, low insertion

loss and low intermodulation products are required. Typical

applications include base station, wireless and RF data and

wireless local loop gain control circuits.

Condition

Min.

Typ.

Max.

Unit

DC–1.0 GHz

1.4

1.7

dB

DC–2.0 GHz

1.7

2.2

dB

15.5

dB

DC–1.0 GHz

± (0.2 + 3% of

Attenuation Setting in dB)

dB

DC–2.0 GHz

± (0.4 + 3% of

Attenuation Setting in dB)

dB

VSWR (I/O)

DC–2.0 GHz

1.4:1

1.8:1

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

50

ns

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

100

ns

Video Feedthru

50

mV

Input Power for 1 dB Compression

0.50–2.0 GHz

+24

+29

dBm

0.05 GHz

+17

+22

dBm

Intermodulation Intercept Point (IP3)

For Two-tone Input Power +5 dBm

0.50–2.0 GHz

+44

+50

dBm

0.05 GHz

+35

+40

dBm

Control Voltages

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

1. All measurements made in a 50

Ω system, unless otherwise specified.

2. DC = 300 kHz.

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

4. Attenuation value referenced above insertion loss.

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

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