Datasheet HMC230MS8 Datasheet (Hittite)

HMC230MS8

MICROWAVE CORPORATION

4 dB LSB GaAs IC 3 - BIT DIGITAL ATTENUATOR 0.75 - 2.0 GHz

2

ATTENUATORS

SMT

FEBRUARY 2001

Features

4 dB LSB STEPS to 28 dB

SINGLE POSITIVE CONTROL PER BIT

+/- 0.5 dB TYPICAL BIT ERROR

PIN - FOR - PIN REPLACEMENT TO
AA100-59 DIGITAL ATTENUATOR

V01.0700

General Description

The HMC230MS8 is a broadband 3 - bit posi­tive control GaAs IC digital attenuator in an 8
lead MSOP surface mount plastic package.
Covering 0.75 to 2 GHz the insertion loss is
typically less than 2 dB. The attenuator bit
values are 4 (LSB), 8, and 16 dB for a total
attenuation of 28 dB. Accuracy is excellent at
± 0.5 dB typical with an IIP3 of up to +48 dBm.
Three 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 HMC230MS8 is ideal for cellular, PCS,
ISM, MMDS, and WLL handset & basestation
applications.

Guaranteed Performance

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

Parameter Frequency Min. Typ. Max. Units

Insertion Loss
Attenuation Range 0.75 - 2.0 GHz 28 dB
Return Loss (RF1 & RF2, AllAtten.States)

Attenuation Accuracy: (Referenced to Insertion Loss)

4, 8, 12, 16, 20 dB States
24, 28 dB States
All Attenuation States

InputPower for 0.1 dB Compression 5V3V0.75 - 2.0 GHz 20

Input Third Order Intercept Point
(Two-Tone Input Power = 0dBm Each)

Switching Character istics
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

0.75 - 1.7 GHz

1.7- 2.0 GHz

0.75 - 1.7 GHz

1.7- 2.0 GHz

0.75 - 1.4 GHz

0.75 - 1.4 GHz

1.40 - 2.0 GHz

5V3V0.75 - 2.0 GHz 46

0.75 - 2.0 GHz

10
13

±0.3+3%ofAtten.SettingMax
±0.4+6%ofAtten.SettingMax
±0.3+3%ofAttem.SettingMax

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1.6

1.8

13
16

19

45

560

600

1.8

2.1

dB
dB

dB
dB

dB
dB
dB

dBm
dBm

dBm
dBm

ns
ns

MICROWAVE CORPORATION

4 dB LSB GaAs IC 3 - BIT DIGITAL ATTENUATOR 0.75 - 2.0 GHz

HMC230MS8

V01.0700

Insertion Loss

0

-0.5

-1

-1.5

-2

INSERTION LOSS (dB)

-2.5

-3

0.75 1 1.25 1.5 1.75 2

+85 C

-40 C

FREQUENCY (GHz)

Normalized Attenuation

(Only Major States are Shown)

0

-5

-10

-15

+25 C

4dB

8dB

16 dB

FEBRUARY 2001

Return Loss RF1, RF2

(

Only Major States are Shown)

0

-5

16, 28 dB

-10

-15

RETURN LOSS(dB)

-20

-25

0.75 1 1.25 1.5 1.75 2

4dB

8dB

FREQUENCY (GHz)

Bit Error vs Attenuation State

3

2

1

2

ATTENUATORS

SMT

0.9 GHz

-20

-25

-30

NORMALIZEDINSERTIONLOSS(dB)

-35

0.75 1 1.25 1.5 1.75 2
FREQUENCY (GHz)

28 dB

0

BIT ERROR (dB)

-1

-2
4 8 12 16 20 24 28

ATTENUATIONSTATE(dB)

1.9 GHz

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

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

2 - 39

HMC230MS8

MICROWAVE CORPORATION

4 dB LSB GaAs IC 3 - BIT DIGITAL ATTENUATOR 0.75 - 2.0 GHz

2

ATTENUATORS

SMT

FEBRUARY 2001

Bit Error vs Frequency

Only Major States are Shown)

(

4
3
2
1
0

-1

BIT ERROR (dB)

8dB

-2

-3

-4

0.75 1 1.25 1.5 1.75 2

4dB

FREQUENCY (GHz)

Functional Diagram/
Application Circuit

Vdd

Pin Number

5 k W

R1

100 pF

RF1

V2

GND

C1

1

2

3

4 dB

8 dB

16 dB

28 dB

V01.0700

Relative Phase vs Frequency

(

Only Major States are Shown)

60

16 dB

40

20

0

-20

RELATIVE PHASE (deg.)

-40

-60

0.75 1 1.25 1.5 1.75 2

FREQUENCY (GHz)

28 dB

8dB

4dB

T ruth Table

Control Voltage Input Attenuation

V1

16 dBV24dBV38dB

High High High Reference

High Low High 4 dB

GND

8

V3

7

GND

6

High High Low 8 dB

Low High High 16 dB

Low Low Low 28 dB

Anycombinationof above states will
provide an attenuation approximately
equalto the sum of the bits selected.

Setting

RF1 -RF2

I.L.

Max Atten.

V1

DC blocking capacitors C1 & C2 are required on RF1 & RF2. Choose C1 = C2
= 100 ~ 300 pF to allow lowest customer specific frequency to pass with
minimal loss. R1 = 5KΩ is required to supply voltage to the circuit through
either PIN 1 or PIN 5.

4

16 dB

100 pF

5

RF2

C2

Control & Bias
V oltages

State Bias Condition

Low 0 to +0 .2V@ 20 uA Ma x

High Vdd ± 0.2 V @ 50 uA Typ

Note: Vdd = +3V to +5V± 0.2V

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

2 - 40

HMC230MS8

MICROWAVE CORPORATION

4 dB LSB GaAs IC 3 - BIT DIGITAL ATTENUATOR 0.75 - 2.0 GHz

V01.0700

Absolute Maximum Ratings

Control Voltage (V1, V2, V3) Vdd + 0.5 Vdc
Bias Voltage(Vdd) +8.0 Vdc

StorageTemperature -65to+150degC
Operating Temperature -40 to +85deg C
RF Input Power (0.75 - 2 GHz) +26 dBm

Outline

FEBRUARY 2001

2

ATTENUATORS

SMT

1. MATERIAL:
A) PACKAGE BODY - LOW STRESS INJECTION-MOLDED PLASTIC.
B) LEADFRAME MATERIAL: COPPER ALLOY

2 . PLATING : LEAD - TIN SOLDER PLATE

3. DIMENSIONS ARE IN INCHES (MILLIMETERS).
UNLESS OTHERWISE SPECIFIED ALL TOL. ARE ±0.005(±0.13).

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

4. DIMENSION DOES NOT INCLUDE MOLDFLASH OF 0.15 MM PER SIDE

5. DIMENSION DOES NOT INCLUDE MOLDFLASH OF 0.25 MM PER SIDE

2 - 41

MICROWAVE CORPORATION

4 dB LSB GaAs IC 3 - BIT DIGITAL ATTENUATOR 0.75 - 2.0 GHz

HMC230MS8

2

ATTENUATORS

SMT

FEBRUARY 2001

Evaluation Circuit Board

V01.0700

* R2 = R3 = R4 = 100 Ω .
These resistors are optional and

may be used to enhance
decoupling of the RF path from
the control inputs.

The circuit board used in the final application should use RF circuit design techniques. Signal lines should have
50 ohm impedance while the package ground leads should be connected directly to the ground plane similar to
that shown above. A sufficient number of VIA holes should be used to connect the top and bottom ground planes.
The evaluation circuit board as shown is available from Hittite upon request.

Evaluation Circuit Board Layout Design Details

Item Description

J1 - J2 PC Mount SMA Connector
J3 - J6 DC Pin
R1 5k Ω Resistor, 0402 Chip
R2, R3, R4 100 Ω Resistor, 0402 Chip
C1, C2 0402 Chip Capacitor, Select for

Lowest Frequency of Operation
U1 HMC230MS8 Digital Attenuator
PCB* 103153 Evaluation PCB 1.25" x 1.5"

*Circuit Board Material: Rogers 4350

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

2 - 42

MICROWAVE CORPORATION

4 dB LSB GaAs IC 3 - BIT DIGITAL ATTENUATOR 0.75 - 2.0 GHz

HMC230MS8

V01.0700

NOTES:

FEBRUARY 2001

2

ATTENUATORS

SMT

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

2 - 43