HMC305LP4E View Datasheet(PDF) - Hittite Microwave

Part Name

Description

Manufacturer

HMC305LP4E

0.5 dB LSB GaAs MMIC 5-BIT SERIAL CONTROL DIGITAL ATTENUATOR, 0.7 - 3.8 GHz

Hittite Microwave 

HMC305LP4 / 305LP4E

v03.0809

5

0.5 dB LSB GaAs MMIC 5-BIT SERIAL

CONTROL DIGITAL ATTENUATOR, 0.7 - 3.8 GHz

UED Worst Case Step Error

TIN Between Successive Attenuation States

1.2

N 0.8

ISCO T 0.4

D DUC esigns 0

D -0.4

PRO for New -0.8

ended -1.2

m 0.5

1

1.5

2

2.5

3

3.5

4

Not Recom FREQUENCY (GHz)

Digital Control Voltages

State

Low

High

Vcc = +5V

0 to 1.3V

3.5 to 5V

Vcc = +3V

0 to 0.7V

2.3 to 3V

Serial Input Truth Table

Latch

Enable

X

X

Shift

Clock

X





X

Reset

L

H

H

Function

Shift register cleared

Shift register clocked

Contents of shift register

transferred to Digital

Attenuator

Timing

Truth Table

Parameter

Symbol

Serial Input Setup

Time

Hold time from Serial

Input to Shift Clock

Setup time from

Shift Clock to Latch

Enable

Propagation delay,

Latch Enable to C0.5

through C8

Setup time from

Reset to Shift Clock

Clock Frequency

(1/tclk)

ts

th

tlsup

tpd

-

fclk

Vcc = +5V

Min. Max.

20

-

0

-

40

-

-

30

20

-

-

30

Vcc = +3V Units

Min. Max.

100 -

ns

5

-

ns

100 -

ns

-

70 ns

50

-

ns

-

10 MHz

Serial Control Input

C 0.5 C 1

C2

C4

C8

Attenuation

Setting

RF1 - RF2

High High High High High

Reference

I.L.

Low High High High High

0.5 dB

High Low High High High

1 dB

High High Low High High

2 dB

High High High Low High

4 dB

High High High High Low

8 dB

Low Low

Low

Low

Low

15.5 dB

Max. Atten.

Any combination of the above states will provide an attenuation

approximately equal to the sum of the bits selected.

Timing Diagram

5-4

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

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