HMC288MS8E - Hittite Microwave Corporation

ATTENUATORS - SMT

5 - 34

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

2 dB LSB GaAs MMIC 3-BIT DIGITAL

ATTENUATOR, 0.7 - 3.7 GHz

General Description

Features

Functional Diagram

2 dB LSB Steps to 14 dB

Single Positive Control Per BIT

Monotonic: ±03 dB Bit Error Typical

Miniature MSOP-8 Package, 14.8mm2

Electrical Speci cations,

TA = +25° C, Vdd = +3V to +5V & Vctl = 0/Vdd (Unless Otherwise Stated)

Typical Applications

The HMC288MS8 & HMC288MS8E are broadband

3-bit positive control GaAs IC digital attenuators in 8

lead MSOP surface mount plastic packages. Cover-

ing 0.7 to 3.7 GHz, the insertion loss is typically less

than 1.2 to 1.8 dB. The attenuator bit values are 2

(LSB), 4, and 8 dB for a total attenuation of 14 dB.

Accuracy is excellent at ± 0.3 dB typical with an

IIP3 of up to +51 dBm. Three bit control voltage inputs,

toggled between 0 and +3 to +5V, are used to select

each attenuation state at less than 50 uA each. A sin-

gle Vdd bias of +3 to +5V applied through an external

5K Ohm resistor is required while occupying less than

14.8 mm.

The HMC288MS8 / HMC288MS8E is ideal for:

• Cellular

• PCS, ISM, MMDS

• WLL applications

Parameter Frequency Min. Typical Max. Units

Insertion Loss

0.7 - 1.4 GHz

1.4 - 2.3 GHz

2.3 - 2.7 GHz

2.7 - 3.7 GHz

1. 0

1. 3

1. 5

1. 7

1. 4

1. 7

2.0

2.3

Attenuation Range 0.7 - 3.7 GHz 14 dB

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

0.7 - 1.4 GHz

1.4 - 2.3 GHz

2.3 - 2.7 GHz

2.7 - 3.7 GHz

Attenuation Accuracy: (Referenced to Insertion Loss)

All Attenuation States

0.7 - 1.4 GHz

1.4 - 2.3 GHz

2.3 - 2.7 GHz

2.7 - 3.7 GHz

± 0.3 + 3% of Atten. Setting Max

± 0.2 + 3% of Atten. Setting Max

± 0.3 + 3% of Atten. Setting Max

± 0.3 + 4% of Atten. Setting Max

Input Power for 0.1 dB Compression 5V

3V 0.7 - 3.7 GHz 25

dBm

Input Third Order Intercept Point

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

3V 0.7 - 3.7 GHz 51

dBm

Switching Characteristics

tRISE, tFALL (10/90% RF)

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

0.7 - 3.7 GHz 560

600

HMC288MS8 / 288MS8E

v01.0705

ATTENUATORS - SMT

5 - 35

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 Bit Error

vs. Attenuation State

Return Loss RF1, RF2

(Only Major States are Shown)

Insertion Loss

Normalized Attenuation

(Only Major States are Shown)

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

Absolute Bit Error vs. Frequency

(Only Major States are Shown)

Relative Phase vs. Frequency

(Only Major States are Shown)

2 dB LSB GaAs MMIC 3-BIT DIGITAL

ATTENUATOR, 0.7 - 3.7 GHz

HMC288MS8 / 288MS8E

v01.0705

-4

-3.5

-3

-2.5

-2

-1.5

-1

-0.5

0.5 1 1.5 2 2.5 3 3.5 4

+25 C

-40 C

+85 C

INSERTION LOSS (dB)

FREQUENCY (GHz)

0.3

0.6

0.9

1.2

1.5

2468101214

0.9 GHz

1.9 GHz

2.4 GHz

3.5 GHz

BIT ERROR (dB)

ATTENUATION STATE (dB)

-16

-14

-12

-10

-8

-6

-4

-2

0.5 1 1.5 2 2.5 3 3.5 4

2 dB

4 dB

8 dB

14 dB

NORMALIZED ATTENUATION (dB)

FREQUENCY (GHz)

-20

0.5 1 1.5 2 2.5 3 3.5 4

2 dB

4 dB

8 dB

16 dB

RELATIVE PHASE (deg.)

FREQUENCY (GHz)

0.3

0.6

0.9

1.2

1.5

0.5 1 1.5 2 2.5 3 3.5 4

2 dB

4 dB

8 dB

14 dB

BIT ERROR (dB)

FREQUENCY (GHz)

-25

-20

-15

-10

-5

0.5 1 1.5 2 2.5 3 3.5 4

2 dB

4 dB

8 dB

14 dB

RETURN LOSS (dB)

FREQUENCY (GHz)

ATTENUATORS - SMT

5 - 36

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

Control & Bias Voltages

Truth Table

Application Circuit

DC blocking capacitors C1 & C2 are required on RF1 & RF2. Choose C1 = C2 = 100 ~ 300 pF to allow lowest customer speci c

frequency to pass with minimal loss. R1 = 5K Ohm is required to supply voltage to the circuit throught either PIN 5 or PIN 8.

Control Voltage Input Attenuation

Setting

RF1 - RF2

8 dB

4 dB

2 dB

High High High Reference

I.L.

High High Low 2 dB

High Low High 4 dB

Low High High 8 dB

Low Low Low 14 dB

Max. Atten.

Any combination of the above states will provide an attenuation

approximately equal to the sum of the bits selected.

State Bias Condition

Low 0 to +0.2V @ 20 uA Max.

High Vdd ± 0.2V @ 50 uA Max

Note: Vdd = +3V to 5V ± 0.2V

2 dB LSB GaAs MMIC 3-BIT DIGITAL

ATTENUATOR, 0.7 - 3.7 GHz

HMC288MS8 / 288MS8E

v01.0705

ATTENUATORS - SMT

5 - 37

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, V2, V3) Vdd + 0.5 Vdc

Bias Voltage (Vdd) +8.0 Vdc

Storage Temperature -65 to +150 °C

Operating Temperature -40 to +85 °C

RF Input Power (0.7 - 4 GHz) +28 dBm

NOTES:

1. LEADFRAME MATERIAL: COPPER ALLOY

2. DIMENSIONS ARE IN INCHES [MILLIMETERS]

3. DIMENSION DOES NOT INCLUDE MOLDFLASH OF 0.15mm PER SIDE.

4. DIMENSION DOES NOT INCLUDE MOLDFLASH OF 0.25mm PER SIDE.

5. ALL GROUND LEADS MUST BE SOLDERED TO PCB RF GROUND.

ELECTROSTATIC SENSITIVE DEVICE

OBSERVE HANDLING PRECAUTIONS

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

HMC288MS8 Low Stress Injection Molded Plastic Sn/Pb Solder MSL1 [1] H288

XXXX

HMC288MS8E RoHS-compliant Low Stress Injection Molded Plastic 100% matte Sn MSL1 [2] H288

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

2 dB LSB GaAs MMIC 3-BIT DIGITAL

ATTENUATOR, 0.7 - 3.7 GHz

HMC288MS8 / 288MS8E

v01.0705

ATTENUATORS - SMT

5 - 38

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 Circuit Board

The circuit board used in the  nal application should

use RF circuit design techniques. Signal lines

should have 50 ohm impedance while the pack-

age ground leads should be connected 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 cir-

cuit board as shown is available from Hittite Micro-

wave Corporation upon request.

* R2 = R3 = R4 = 100 Ohm.

These resistors are optional

and may be used to enhance

decoupling of the RF path

from the control inputs.

Item Description

J1 - J2 PCB Mount SMA Connector

J3 - J6 DC Pin

R1 5k Ohm Resistor, 0402 Chip

R2, R3, R4 100 Ohm Resistor, 0402 Chip

C1, C2 0402 Chip Capacitor, Select for Lowest Fre-

quency of Operation

U1 HMC288MS8 / HMC288MS8E

Digital Attenuator

PCB [2] 103141 Evaluation PCB 1.5” x 1.5”

[1] Reference this number when ordering complete evaluation PCB

[2] Circuit Board Material: Rogers 4350

List of Materials for Evaluation PCB 103143 [1]

2 dB LSB GaAs MMIC 3-BIT DIGITAL

ATTENUATOR, 0.7 - 3.7 GHz

HMC288MS8 / 288MS8E

v01.0705

ATTENUATORS - SMT

5 - 39

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

Notes:

2 dB LSB GaAs MMIC 3-BIT DIGITAL

ATTENUATOR, 0.7 - 3.7 GHz

HMC288MS8 / 288MS8E

v01.0705