hittite HMC346C8 User Manual

查询HMC346C8供应商

MICROWAVE CORPORATION

Typical Applications

The HMC346C8 is ideal for:

• Basestation Infrastructure

9

• Fiber Optics & Broadband Telecom

• Microwave Radio & VSAT

• Military Radios, Radar, & ECM

• Test Instrumentation

Functional Diagram

ATTENUATORS - SMT

v00.0504

HMC346C8

GaAs MMIC SMT VOLTAGE-

VARIABLE ATTENUATOR, DC - 8 GHz

Features

Wide Bandwidth: DC - 8 GHz

Low Phase Shift vs. Attenuation

30 dB Attenuation Range

Surface Mount Ceramic Package

General Description

The HMC346C8 is an absorptive Voltage Vari­able Attenuator (VVA) in a non-hermetic surface­mount ceramic package operating from DC - 8
GHz. It features an on-chip reference attenuator
for use with an external op-amp to provide simple
single voltage attenuation control, 0 to -3V. The
device is ideal in designs where an analog DC
control signal must control RF signal levels over
a 30 dB amplitude range. Applications include
AGC circuits and temperature compensation of
multiple gain stages in microwave radios and test
instrumentation.

9 - 62

Electrical Specifi cations, T

Parameter Min Typical Max Units

Insertion Loss DC - 6 GHz

Attenuation Range DC - 8 GHz 30 dB

Return Loss DC - 8 GHz 10 dB

Switching Characteristics

Input Power for 0.25 dB Compression (0.5 - 8 GHz)

Input Third Order Intercept (0.5 - 8 GHz)
(Two-tone Input Power = -8 dBm Each Tone)

For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
12 Elizabeth Drive, Chelmsford, MA 01824 Phone: [phone] Fax: [phone]

= +25° C, 50 ohm system

A

DC - 8 GHz

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

Order Online at www.hittite.com

tRISE, tFALL (10/90% RF)

Min. Atten.

Atten. >2 dB

Min. Atten.

Atten. >2 dB

1.9

2.1

+8

-2

+25
+10

2.9

3.1

2
8

dB
dB

ns
ns

dBm
dBm

dBm
dBm

v00.0504

HMC346C8

MICROWAVE CORPORATION

GaAs MMIC SMT VOLTAGE-

VARIABLE ATTENUATOR, DC - 8 GHz

Relative Attenuation, Control Voltage

GaAs MMIC SUB-HARMONICALLY PUMPED MIXER 17 - 25 GHz

Insertion Loss vs. Temperature

0

-0.5

-1

-1.5

-2

-2.5

-3

-3.5

INSERTION LOSS (dB)

-4

-4.5

-5
012345678910

+25C
+85C

-40C

FREQUENCY (GHz)

Return Loss vs. Attenuation

0

Optimized for 4 GHz Operation

0

-5

-10

-15

-20

-25

ATTENUATION (dB)

-30

-35
012345678910

FREQUENCY (GHz)

Relative Attenuation, Control Voltage
Optimized for 8 GHz Operation

0

9

-5

-10

-15

-20

-25

RETURN LOSS (dB)

-30

-35
012345678910

FREQUENCY (GHz)

5dB
10dB
15dB
20dB
25dB
30dB

Relative Attenuation vs.
Control Voltage @ 4 GHz

0

-0.5

-1

-1.5

-2

CONTROL VOLTAGE (Vdc)

-2.5

V1 +25C
V2 +25C
V1 +85C
V2 +85C
V1 -40C
V2 -40C

-5

-10

-15

-20

-25

ATTENUATION (dB)

-30

-35
012345678910

FREQUENCY (GHz)

Relative Attenuation vs.
Control Voltage @ 8 GHz

0

V1 +25C

-0.5

-1

-1.5

-2

CONTROL VOLTAGE (Vdc)

-2.5

V2 +25C
V1 +85C
V2 +85C
V1 -40C
V2 -40C

ATTENUATORS - SMT

-3
0 5 10 15 20 25 30

RELATIVE ATTENUATION (dB)

For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
12 Elizabeth Drive, Chelmsford, MA 01824 Phone: [phone] Fax: [phone]

Order Online at www.hittite.com

-3
0 5 10 15 20 25 30

RELATIVE ATTENUATION (dB)

9 - 63