Hittite HMC291 Datasheet

MICROWAVE CORPORATION

4 dB LSB GaAs IC 2 - BIT DIGITAL ATTENUATOR 0.7 - 4.0 GHz

HMC291

2

ATTENUATORS

SMT

FEBRUARY 2001

Features

4 dB LSB STEPS to 12 dB
SINGLE POSITIVE CONTROL PER BIT, 0/+3V
+/- 0.2 dB TYPICAL BIT ERROR
MINIATURE SOT 26 PACKAGE: 9 mm²

V00.0600

General Description

The HMC291 is a broadband 2 - bit positive
control GaAs IC digital attenuator in a 6 lead
SOT26 surface mount plastic package. Cov­ering 0.7 to 4 GHz the insertion loss is typically
less than 0.7 to 1.3 dB. The attenuator bit
values are 4 (LSB) and 8 dB for a total attenu­ation of 12 dB. Accuracy is excellent at ± 0.2
dB typical with an IIP3 of up to +54 dBm. Two
bit control voltage inputs, toggled between 0
and +3 to +5 volts, are used to select each
attenuation state at less than 50 uA each. A
single Vdd bias of +3 to +5 volts applied
through an external 5KΩ resistor is required.
The HMC291 is ideal for cellular, PCS, ISM,
MMDS, and WLL handset & basestation appli­cations. Occupying less than 9 mm², this is the
smallest 2 - bit digital attenuator available.

Guaranteed Performance

With Vdd =+3V to +5V & Vctl = 0/Vdd (Unless Otherwise Stated), -40 to +85 deg C

Parameter Frequency Min. Typ. Max. Units

0.7 -1.4 GHz

Insertion Loss

Attenuation Range 0.7 - 4.0 GHz 12 dB
Return Loss (RF1 & RF2, All Atten.States)

Attenuation Accuracy:(Referenced to Insertion Loss)
All Attenuation States

All Attenuation States
All Attenuation States
All Attenuation States

InputPower for 0.1 dB Compression 5V3V0.7 - 4.0 GHz 26
InputThird Order Intercept Point

(Tw o-Tone InputPower = 0dBm Each)
Switching Characteristics

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

12 Elizabeth Drive, Chelmsford, MA 01824 Phone: [phone] Fax: [phone] Web Site: www.hittite.com

1.4 - 2.3 GHz

2.3 - 2.7 GHz

2.7 - 4.0 GHz

0.7 - 1.4 GHz

1.4 - 4.0 GHz

0.7 - 1.4 GHz

1.4 - 2.3 GHz

2.3 - 2.7 GHz

2.7 - 4.0 GHz

5V3V0.7 - 4.0 GHz 54

0.7 - 4.0 GHz

14
16

± 0.3 + 3% of Atten. Setting Max
± 0.2 + 2% of Atten. Setting Max
± 0.2 + 3% of Atten. Setting Max
± 0.4 + 5% of Atten. Setting Max

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0.7

0.9

1.0

1.1

17
22

22
50

560
600

1.0

1.3

1.4

1.6

dB
dB
dB
dB

dB
dB

dB
dB
dB
dB

dBm
dBm

dBm
dBm

ns
ns

MICROWAVE CORPORATION

4 dB LSB GaAs IC 2 - BIT DIGITAL ATTENUATOR 0.7 - 4.0 GHz

HMC291

V00.0600

Insertion Loss

0

-40 C

-0.5

-1

-1.5

INSERTION LOSS (dB)

-2

-2.5

0.5 1 1.5 2 2.5 3 3.5 4

+85 C

FREQUENCY (GHz)

Normalized Attenuation

0

-2

-4

-6

-8

-10

-12

NORMALIZED INSERTION LOSS (dB)

-14

0.5 1 1.5 2 2.5 3 3.5 4

4dB

8dB

12 dB

FREQUENCY (GHz)

+25 C

FEBRUARY 2001

Return Loss RF1, RF2

0

-5

-10

-15

-20

RETURN LOSS (dB)

-25

-30

-35

0.5 1 1.5 2 2.5 3 3.5 4

4dB

8dB

FREQUENCY (GHz)

Absolute Bit Error vs
Attenuation State

1

0.8

0.6

0.4

BIT ERROR (dB)

0.2

0

0.9 GHz

4 6 8 10 12

ATTENUATION STATE (dB)

3.5 GHz

12 dB

2

ATTENUATORS

SMT

2.4 GHz

1.9 GHz

Note: All Data Typical Over Voltage (+3V to +5V) & Temperature (-40 to +85 deg.C).

S-Parameter data is available On-Line at www.hittite.com

12 Elizabeth Drive, Chelmsford, MA 01824 Phone: [phone] Fax: [phone] Web Site: www.hittite.com

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