9

9 - 144

For price, delivery, and to place orders, please contact Hittite Microwave Corporation:

20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373

Order On-line at www.hittite.com

HMC472LP4

0.5 dB LSB GaAs MMIC 6-BIT DIGITAL

POSITIVE CONTROL ATTENUATOR, DC - 3.0 GHz

v00.0604

Functional Diagram

Electrical Specifications,

T

Typical Applications

The HMC472LP4 is ideal for both RF

and IF applications:

• Cellular; UMTS/3G Infrastructure

• ISM, MMDS, WLAN, WiMAX

• Microwave Radio & VSAT

• Test Equipment & Sensors

Features

0.5 dB LSB Steps to 31.5 dB

Single Control Line Per Bit

TTL/CMOS Compatible Control

+/- 0.5 dB Typical Step Error

Single +5V Supply

4 mm x 4 mm x 1 mm SMT Package

General Description

The HMC472LP4 is a broadband 6-bit GaAs IC

digital attenuator in a low cost leadless surface

mount package. This single positive control line

per bit digital attenuator incorporates off chip

AC ground capacitors for near DC operation,

making it suitable for a wide variety of RF and IF

applications. Covering DC to 3.0 GHz, the

insertion loss is less than 2.0 dB typical. The

attenuator bit values are 0.5 (LSB), 1, 2, 4, 8,

and 16 dB for a total attenuation of

31.5 dB.

Attenuation accuracy is excellent at ± 0.5 dB

typical step error with an IIP3 of +45 dBm. Six

TTL/CMOS control inputs are used to select

each attenuation state. A single Vdd bias of +5V

is required.

Parameter

Frequency (GHz)

Min.

Typ.

Max.

Units

Insertion Loss

DC - 1.5 GHz

1.5 - 3.0 GHz

1.5

2.0

1.8

2.3

dB

dB

Attenuation Range

DC - 3.0 GHz

31.5

dB

Return Loss (RF1 & RF2, All Atten. States)

DC - 3.0 GHz

15

dB

Attenuation Accuracy:

(Referenced to Insertion Loss)

REF - 15.5 dB

16.0 - 31.5 dB

DC - 3.0 GHz

± (0.4 + 4% of Atten. Setting) Max.

± (0.5 + 4% of Atten. Setting) Max.

dB

dB

Input Power for 0.1 dB Compression

0.1 - 3.0 GHz

20

dBm

Input Third Order Intercept Point

(Two-Tone Input Power= 0 dBm Each Tone)

REF - 15.5 dB States

16.0 - 31.5 dB States

0.1 - 3.0 GHz

45

35

dBm

dBm

Switching Characteristics

tRISE, tFALL (10/90% RF)

tON, tOFF (50% CTL to 10/90% RF)

DC - 3.0 GHz

130

140

ns

ns