HRF-AT4521 - HONEYWELL - Product.Network

HRF-AT4521

31.0 dB, DC - 2.5GHz, 5 Bit Serial Digital Attenuator

The Honeywell HRF-AT4521 is a 5-bit digital attenuator that is ideal for use in

broadband communication system applications that require accuracy, speed

and low power consumption. The HRF-AT4521 is manufactured with

Honeywell's patented Silicon On Insulator (SOI) CMOS manufacturing

technology, which provides the performance of GaAs with the economy and

integration capabilities of conventional CMOS. These attenuators are DC

coupled to improve lower operating frequency, frequency response and

reduce the number of DC bias points required.

FEATURES

• Very Low DC Power Consumption

• Attenuation In Steps From 1 dB To 31 dB

• Single Positive Power Supply Voltage

• Serial Data Interface

• 50 Ohm Impedance

• DC-coupled, bi-directional RF path

• Space Saving VQFN Surface Mount Packaging

• Lead-free, RoHS compliant and Green

RF ELECTRICAL SPECIFICATIO NS @ + 25oC

Results @ VDD = 5.0 +/- 10%, VSS = 0 unless otherwise stated, Z0 = 50 Ohm s

Contact Honeywell for relative perform ance at other supply configurations

Parameter Test Condition Frequency Minimum Typical Maximum Units

Insertion Loss 1.0 GHz

2.0 GHz

2.5 GHz 2.0

2.2

2.8

2.6

2.8

3.4

dB

1dB Compression VSS = 0V, Input Power

VSS = - 3V, Input Power 2.0 GHz

2.0 GHz 22

28 dBm

dBm

Input IP3 VSS = 0V

Two-tone inputs, up to +5 dBm

@ 0 dBm attenuation

2.0 GHz

36

dBm

Input IP3 Vss = -3V

Two-tone inputs, up to + 5 dBm

@ 0 dBm attenuation

2.0 GHz

>36

dBm

Return Loss Any Combination of Bits -11 -13 dB

Attenuation Accuracy

All attenuation states

1.0 GHz

2.0 GHz

2.5 GHz

+ (0.25 + 2.5 %), - (0.10 + 5.0 %)

+ 0.45, - (0.20 + 8.0 %)

+ 0.35, - (-0.40 + 10.5%)

dB

Trise, Tfall

Ton, Toff (Tpd) 10% To 90%

50% Cntl To 90%/10%RF 10

15 nS

nS

T clock Period (Tprd) T high / T low = ½ minimum clock period 50 nS

T data set up (Tsup) Set up to rising edge of clock 5 nS

T data hold (Thld) Data hold after rising edge of clock 2 nS

T latch set up (Tlsup) Data set up to rising edge of OE 5 nS

Note 1 - For higher accuracy designs, please consider HRF-AT4610/HRF-AT4 611

HR

F

-

AT4521 in VQFN Packa

g

e

HRF-AT4521

2 www.honeywell.com/microwave

FUNCTIONAL SCHEMATIC

DC ELECTRICAL SPECIFICATIO NS @ + 25°C

Parameter Minimum Typical Maximum Units

VDD 3.31 5.0 5.5 V

VSS -5.0 V

IDD <5.0 50 uA

CMOS Logic level (0) 0 0.8 V

CMOS Logic level (1) VDD – 0.8 VDD V

Input Leakage Current 10 uA

Note 1, the performance curves are for VDD = +5.0 +/- 10%

ABSOLUTE MAXIMUM RATINGS1

Parameter Absolute Maximum Units

Input Power + 35 dBm

VDD +6.0 V

VSS -5.5 V

ESD Voltage2 400 V

Operating Temperature -40 To +85 OC

Storage Temperature -65 To +125 OC

Moisture Sensitivity Level Level 3 @ 260OC

Digital Inputs VDD+0.6 max to -0.6 min V

Note 1 - Operation of this device beyond any of these parameters may cause permanent damage.

Note 2 - Although the HRF-AT4521 contains ESD protection circuitry on all digital inputs, precautions should be taken to

ensure that the Absolute Maximum Ratings are not exceeded.

Latch-Up: Unlike conventional CMOS digital attenuators, Honeywell's HRF-AT4 521 is immune to latch-up.

RF In RF Out

S4 S3 S0S1S2

16dB 8dB 4dB 2dB 1dB

ESD, Buf fer , Le v el Shi ft

HRF- AT4521

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PIN CONFIGURATIONS

Pin Function Pin Function

1 VDD 9 GROUND

2 GROUND 10 RF OUTPUT

3 RF INPUT 11 GROUND

4 GROUND 12 VSS

5 GROUND 13 GROUND

6 GROUND 14 OE

7 GROUND 15 CLK

8 GROUND 16 DATA

Note: Bottom ground plate must be grou nded for proper RF performance.

SERIAL DATA LOAD

Serial data is shifted into the register on the rising edge of clock, MSB first. The state of “OE” will not affect the shifting of

data. The rising edge of the “OE” signal will be the clock for the transfer of shifted data. Latche d new data occurs one

prop delay after the rising edge of “OE ”. See the Electrical Spec Table for AC parameters.

TRUTH TABLE

S4 S3 S2 S1 S0 Output

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

Reference Input

1 dB

2 dB

4 dB

8 dB

16 dB

31 dB

Operation: Data on serial input D is clocked into internal registers on the low to high transition of the Clock signal (CK).

The register output is enabled when Output Enable (OE) is in the low state. "0" = CMOS Low, "1" = CMOS High.

HRF-AT4521

4 www.honeywell.com/microwave

PERFORMANCE CURVES

Insertion Loss

Typical AT4521 Reference Insertion Loss

-4.0

-3.5

-3.0

-2.5

-2.0

-1.5

-1.0

-0.5

0.0

0.00 0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00 2.25 2.50

Frequency (GHz)

Insertion Loss (dB)

- 40 C

+25C

+ 85 C

3.3 V

Return Loss

Typical AT4521 Input Return Loss

-30

-25

-20

-15

-10

-5

0

0.0 0.5 1.0 1.5 2.0 2.5

Frequency (GHz)

Return Loss (dB)

HRF- AT4521

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Step Accuracy

Typical AT4521 Step Accuracy

-1.0

-0.8

-0.6

-0.4

-0.2

0.0

0.2

0.4

0.6

0.8

1.0

0.0 0.3 0.5 0.8 1.0 1.3 1.5 1.8 2.0 2.3 2.5

Frequency (GHz)

Step Accuracy (dB)

1 dB

2 dB

4 dB

8 dB

31 dB

16 dB

8 dB

1 dB

31 dB

2 dB

4 dB

16 dB

Relative Accuracy

Typical AT4521 Relative Accuracy

-5.0

-4.0

-3.0

-2.0

-1.0

0.0

1.0

0.0 0.3 0.5 0.8 1.0 1.3 1.5 1.8 2.0 2.3 2.5

Frequency (GHz)

Relative Accuracy (dB)

1 dB 2 dB

4 dB 8 dB

16 dB 31 dB

31 dB

16 dB 8 dB

HRF-AT4521

6 www.honeywell.com/microwave

PACKAGE OUTLINE DRAWING

GREEN MATERIAL SET

The –GR attenuators have a Green mate rial set that can with stand a maximum soldering temperature of 260OC.

LEAD FINISH

The package leads are Nickel Palladium Gold (NiPdAu). The configuration being manufactured and d elivered today is

lead-free RoHS compliant. Compliant packages have half-etch leadframes and have date codes of 0300 or greater.

LEAD FREE QFN SURFACE MOUNT APPLICATION

Please see Application Note AN310 for assembly process re commendations. The maximum solderin g temperature of the

-GR is 260oC (-AU attenuators are 250 oC). Application Notes can be found at our website:

www.honeywell.com/microwave

CIRCUIT APPLICATION INFORMATION

These attenuators require a DC referen ce to ground. They may not operate properly when AC co upled on both the RF

input and output without a DC ground reference provided as part of the circuit. See Application Note AN311.

Notes

1. Pin 1 identifier can be a combination or a dot and/ or chamfer.

2. Dimensions are in millimeters.

HRF- AT4521

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EVALUATION CIRCUIT BOARD

Honeywell's evaluation board provides an easy to use method of evaluating the RF performance of our attenuator. Simply

connect power, DC and RF signals to b e measuring attenuator performance in less than 10 minutes.

EVALUATION CIRCUIT BOARD LAYOUT DESIGN DETAILS

Item Description

PCB Impedance Matched Multi-Layer FR4

Attenuator HRF-AT4521 Digital Attenuator

Chip Capacitor Panasonic Model ECU-E1C103KBQ Capacitor, .01uf 0402 10% 16V

RF Connector Johnson Con nectors Model 142-0701-801 SMA RF Coaxial Connector

DC Pin Mil-Max Model 800-10-064-10-001 Header Pins

ORDERING INFORMATION

Ordering Number Delivery Method Units Per Shipment

HRF-AT4521-GR-TR

HRF-AT4521-GR-T

HRF-AT4521-E

Tape and Reel

Tape

Evaluation Board

2500 Units per Reel

<2500

One Board Per Box

The new –GR attenuators will replace and are fully back-compatible with the –AU attenuators.

FIND OUT MORE

For more information on Honeywell’s Microwave Products visit us online at www.honeywell.com/microwave or contact

us at 800-323-8295 (763-954-2474 internationally).

Honeywell reserves the right to make changes to improve reliability, function or design. Honeywell does not assume any liability arising out of the

application or use of any product or circuit described herein; neither does it convey any license under its patent rights nor the rights of others.

Honeywell

12001 High wa y 55

Plymouth, MN 55441

Tel: 800-323-8295

www.honeywell.com/microwave

Form #4521W

September 2007

y

well International Inc.

HRF-AT4521 Evaluation Board

HRF-AT4521

Evaluation Board

Top View

HRF-AT4521

Honeywell

RF In RF Out

VDD VSS

Gnd

Gnd DataCLK OE