HMC468LP3TR - Hittite Microwave Corporation

ATTENUATORS - SMT

5 - 138

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

HMC468LP3 / 468LP3E

1 dB LSB GaAs MMIC 3-BIT DIGITAL

POSITIVE CONTROL ATTENUATOR, DC - 6 GHz

v03.1107

Functional Diagram

Electrical Speci cations, TA = +25° C, With Vdd = +5V & Vctl = 0/+5V

The HMC468LP3 / HMC468LP3E is ideal for:

• Cellular; UMTS/3G Infrastructure

• Fixed Wireless & WLL

• Microwave Radio & VSAT

• Test Equipment

1 dB LSB Steps to 7 dB

High IP3: +50 dBm

± 0.25 dB Typical Bit Error

Single Control Line Per Bit

Single +5V Supply

16 Lead 3x3mm SMT Package: 9mm2

Included in the HMC-DK004 Designer’s Kit

The HMC468LP3 & HMC468LP3E are broadband

3-bit GaAs IC digital attenuators in low cost leadless

surface mount packages. Covering DC to 6.0 GHz,

the insertion loss is less than 1 dB typical up to 4

GHz. The attenuator bit values are 1 (LSB), 2 and 4

dB for a total attenuation of 7 dB. Attenuation accu-

racy is excellent at ±0.4 dB typical step error with an

IIP3 of +50 dBm. Three control voltage inputs, toggled

between 0 and +5V, are used to select each attenua-

tion state. A single Vdd bias of +5V is required.

Parameter Frequency (GHz) Min. Typ. Max. Units

Insertion Loss

DC - 2.5 GHz

2.5 - 4.5 GHz

4.5 - 6.0 GHz

0.7

0.9

1.3

1.0

1.3

1.8

Attenuation Range DC - 6 GHz 7 dB

Return Loss (RF1 & RF2, All Atten. States) DC - 4 GHz

4.0 - 6.0 GHz

Attenuation Accuracy:

(Referenced to Insertion Loss)

All States

1 - 4 dB States

5 - 7 dB States

DC - 2.5 GHz

2.5 - 6.0 GHz

± 0.2 + 2% of Atten. Setting Max.

± 0.3 + 3% of Atten. Setting Max.

± 0.4 + 4% of Atten. Setting Max.

Input Power for 0.1 dB Compression 0.25 - 6.0 GHz 20 dBm

Input Third Order Intercept Point

(Two-Tone Input Power= 0 dBm Each Tone) 0.25 - 6.0 GHz 50 dBm

Switching Characteristics

tRISE, tFALL (10/90% RF)

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

DC - 6 GHz

110

135

* Bypass capacitor connecting ACG1, ACG2 & ACG3 to RF ground required per pin description herein.

Typical Applications Features

General Description

ATTENUATORS - SMT

5 - 139

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

Return Loss RF1, RF2

(Only Major States are Shown)

Insertion Loss

Normalized Attenuation

(Only Major States are Shown)

Bit Error vs. Frequency

(Only Major States are Shown)

Relative Phase vs. Frequency

(Only Major States are Shown)

Bit Error vs. Attenuation State

-3

-2.5

-2

-1.5

-1

-0.5

0123456

+25 C

+85 C

-40 C

INSERTION LOSS (dB)

FREQUENCY (GHz)

-35

-30

-25

-20

-15

-10

-5

0123456

1 dB

2 dB

4 dB

7 dB

RETURN LOSS (dB)

FREQUENCY (GHz)

-10

-8

-6

-4

-2

0123456

1 dB

2 dB

4 dB

7 dB

NORMALIZED ATTENUATION (dB)

FREQUENCY (GHz)

-1

-0.6

-0.2

0.2

0.6

1234567

80 MHz

500 MHz

1 GHz

2 GHz

3 GHz

4 GHz

5 GHz

6 GHz

BIT ERROR (dB)

ATTENUATION STATE (dB)

-1

-0.6

-0.2

0.2

0.6

0123456

1 dB

2 dB

4 dB

7 dB

BIT ERROR (dB)

FREQUENCY (GHz)

-10

-5

0123456

1 dB

2 dB

4 dB

7 dB

RELATIVE PHASE (deg)

FREQUENCY (GHz)

HMC468LP3 / 468LP3E

v03.1107

1 dB LSB GaAs MMIC 3-BIT DIGITAL

POSITIVE CONTROL ATTENUATOR, DC - 6 GHz

ATTENUATORS - SMT

5 - 140

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

Truth Table

TTL/CMOS Control Voltages

State Bias Condition

Low 0 to 0.8 Vdc @ -5 uA Typ.

High +2.0 to +5.0 Vdc @ 40 uA Typ.

Control Voltage Input

Attenuation Setting

RF1 - RF2

4 dB

2 dB

1 dB

High High High Reference I.L.

High High Low 1 dB

High Low High 2 dB

Low High High 4 dB

Low Low Low 7 dB

Any combination of the above states will provide an attenuation

approximately equal to the sum of the bits selected.

Worst Case Step Error

Between Successive Attenuation States

-1

-0.6

-0.2

0.2

0.6

0123456

STEP ERROR (dB)

FREQUENCY (GHz) Bias Voltage & Current

Vdd Range= +5.0 Vdc ± 10%

Vdd

(Vdc)

Idd (Typ.)

(mA)

Idd (Max.)

(mA)

+5.0 1.05 1.8

HMC468LP3 / 468LP3E

v03.1107

1 dB LSB GaAs MMIC 3-BIT DIGITAL

POSITIVE CONTROL ATTENUATOR, DC - 6 GHz

ATTENUATORS - SMT

5 - 141

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

Absolute Maximum Ratings

Outline Drawing

Control Voltage (V1 to V3) -0.5 Vdc to Vdd +1 Vdc

Bias Voltage (Vdd) +7 Vdc

Storage Temperature -65 to +150 °C

Operating Temperature -40 to +85 °C

RF Input Power +30 dBm

ESD Sensitivity (HBM) Class 1A

ELECTROSTATIC SENSITIVE DEVICE

OBSERVE HANDLING PRECAUTIONS

Part Number Package Body Material Lead Finish MSL Rating Package Marking [3]

HMC468LP3 Low Stress Injection Molded Plastic Sn/Pb Solder MSL1 [1] 468

XXXX

HMC468LP3E RoHS-compliant Low Stress Injection Molded Plastic 100% matte Sn MSL1 [2] 468

XXXX

[1] Max peak re ow temperature of 235 °C

[2] Max peak re ow temperature of 260 °C

[3] 4-Digit lot number XXXX

Package Information

NOTES:

1. LEADFRAME MATERIAL: COPPER ALLOY

2. DIMENSIONS ARE IN INCHES [MILLIMETERS]

3. LEAD SPACING TOLERANCE IS NON-CUMULATIVE

4. PAD BURR LENGTH SHALL BE 0.15mm MAXIMUM.

PAD BURR HEIGHT SHALL BE 0.05mm MAXIMUM.

5. PACKAGE WARP SHALL NOT EXCEED 0.05mm.

6. ALL GROUND LEADS AND GROUND PADDLE MUST BE

SOLDERED TO PCB RF GROUND.

7. REFER TO HITTITE APPLICATION NOTE FOR SUGGESTED

LAND PATTERN.

HMC468LP3 / 468LP3E

v03.1107

1 dB LSB GaAs MMIC 3-BIT DIGITAL

POSITIVE CONTROL ATTENUATOR, DC - 6 GHz

ATTENUATORS - SMT

5 - 142

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

Pin Descriptions

Pin Number Function Description Interface Schematic

1, 3, 4, 8,

9, 10, 12 N/C These pins should be connected to PCB

RF ground to maximize performance.

2, 11 RF1, RF2 This pin is DC coupled and matched to 50 Ohm.

Blocking capacitors are required

13 - 15 V1 - V3 See truth table and control voltage table.

5 - 7 ACG1 - ACG3

External capacitor to ground is required.

Select value for lowest frequency of operation.

Place capacitor as close to pins as possible.

16 Vdd Supply Voltage

GND Package bottom has an exposed metal paddle

that must be connected to RF/DC ground.

Application Circuit

HMC468LP3 / 468LP3E

v03.1107

1 dB LSB GaAs MMIC 3-BIT DIGITAL

POSITIVE CONTROL ATTENUATOR, DC - 6 GHz

ATTENUATORS - SMT

5 - 143

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

Evaluation PCB

The circuit board used in the  nal application should

use RF circuit design techniques. Signal lines

should have 50 ohm impedance while the package

ground leads and exposed paddle should be con-

nected directly to the ground plane similar to that

shown. A sufficient number of via holes should be

used to connect the top and bottom ground planes.

The evaluation circuit board shown is available from

Hittite upon request.

List of Materials for Evaluation PCB 107302 [1]

Item Description

J1 - J2 PCB Mount SMA Connector

J3 - J7 DC Pin

C1 1000 pF Capacitor, 0603 Pkg.

C2, C3 100 pF Capacitor, 0402 Pkg.

C4 3300 pF Capacitor, 0603 Pkg.

U1 HMC468LP3 / HMC468LP3E

Digital Attenuator

PCB [2] 107300 Evaluation PCB

[1] Reference this number when ordering complete evaluation PCB

[2] Circuit Board Material: Rogers 4350

HMC468LP3 / 468LP3E

v03.1107

1 dB LSB GaAs MMIC 3-BIT DIGITAL

POSITIVE CONTROL ATTENUATOR, DC - 6 GHz