ARA05050RS12P1 - Anadigics

204227B • Skyworks Proprietary and Condential Information • Products and Product Information are Subject to Change Without Notice • September 19, 2016

FEATURES

• LowCostIntegratedMonolothicGaAsAmplier

With Step Attenuator

• Attenuation Range: 0-30 dB, Adjustable In

2dB Increments Via a 4 Wire Parallel Control

• Meets DOCSIS Distortion Requirements at

+58dBmV Output Signal Level

• Low Distortion and Low Noise

• Low Signal toNoise Ratio at All Gain Levels

• Frequency Range: 5-100 MHz

• 5 Volt Operation

• RoHS-Compliant Package Option

APPLICATIONS

• MCNS/DOCSIS Compliant Cable Modems

• CATV Interactive Set-Top Box

• OpenCable Set-Top Box

• Fiber Nodes

• Cable Modem Termination Systems (CMTS)

PRODUCT DESCRIPTION

The ARA05050 is a GaAs IC designed to provide the

reverse path amplication and output level control

functions in a CATV Set-Top Box or Cable Modem.

It incorporates a digitally controlled precision step

attenuator that is preceded by an ultra low noise

amplierstage,andfollowedbyanultra-linearoutput

driver amplier. This device is capable of meeting

the MCNS/DOCSIS requirements for harmonic

Figure 1: Cable Modem or Set Top Box Application Diagram

S12 Package

28 Pin SSOP with Heat Slug

performance at a +58dBmV output level while requiring

only a single polarity +5V supply. Both the input

and the output are single-ended and matched to 75

Ohms. The precision attenuator provides up to 30 dB

of attenuation in 2 dB increments. The ARA05050 is

offered in a 28-pin SSOP package that features a heat

slug on the bottom of the package, and is available in

a RoHS-compliant option.

LPF

Diplexer

ARA05050

SAW

Filter

Double-

Conversion

Tuner

MAC

Upstream

QPSK/16QAM

Modulator

QAM Receiver

with FEC

Balun

Transmit Enable/Disable

Attenuation Control

Microcontroller

with Ethernet

MAC

RAM ROM

10Base-T

Transceiver

RJ45

Connecto

Clock

Data

54-860 MHz

44 MHz

5-42 MHz

LPF

Switch

ARA05050

ReverseAmplierwithStepAttenuator

Data Sheet

ARA05050

Data Sheet

September 19, 2016 • Skyworks Proprietary and Condential Information • Products and Product Information are Subject to Change Without Notice • 204227B

Figure 2: Functional Block Diagram

Figure 3: Pinout

N/C

ISET1

N/C

ATTACG1

ATTOUT

VREF1

RFOUT1

ATTIN

16 dB

VATT

8 dB

RFIN

N/C

VREF2

ISET2

GND

Bypass

RFOUT2

ATTACG2

RFIN2

ATTACG1

ATTACG1 ATTACG2

ATTACG2

2 dB

4 dB

RF IN RF OUT2

SET2

SET1

16 dB 2 dB4 dB8 dB

IN2

OUT1

ATT

OUT

ATT

A1 A2

30 dB, 2dB step digital attenuator section

ARA05050

Data Sheet

204227B • Skyworks Proprietary and Condential Information • Products and Product Information are Subject to Change Without Notice • September 19, 2016

Table 1: Pin Description

Notes:

(1) All N/C pins should be grounded.

(2) Pins should be AC-coupled. No external DC bias should be applied.

(3) Pins should be AC-grounded. No external DC bias should be applied.

(4) Pins should be grounded or pulled to ground through a resistor. No external DC bias should be applied.

PIN NAME DESCRIPTION PIN NAME DESCRIPTION

1N/C No Connection

(1)

28 N/C No Connection

(1)

2Bypass Internal Bypass 27 N/C No Connection

(1)

3ATT

Attenuator Input

(2)

26 ATT

OUT

Attenuator Output

(2)

4RF

OUT1

Amplifier A1 Output and Supply 25 I

SET2

Amplifier A2 Current Adjust

(4)

5 V

REF1

Reference Voltage for Amplifier

A1 24 RF

IN2

Amplifier A2 Input

(4)

6ATT

ACG1

Attenuator AC Ground 1

(3)

23 ATT

ACG2

Attenuator AC Ground 2

(3)

7ATT

ACG1

Attenuator AC Ground 1

(3)

22 ATT

ACG2

Attenuator AC Ground 2

(3)

8ATT

ACG1

Attenuator AC Ground 1

(3)

21 ATT

ACG2

Attenuator AC Ground 2

(3)

9ATT

ACG1

Attenuator AC Ground 1

(3)

20 ATT

ACG2

Attenuator AC Ground 2

(3)

10 RF

Amplifier A1 Input

(4)

19 V

REF2

Reference Voltage for Amplifier A2

11 I

SET1

Amplifier A1 Current Adjust

(4)

18 RF

OUT2

Amplifier A2 Output and Supply

12 V

ATT

Attenuator Supply 17 GND Ground

13 16 dB 16 dB Attenution Control Bit 16 2 dB 2 dB Attenuition Control Bit

14 8 dB 8 dB Attenution Control Bit 15 4 dB 4 dB Attenuition Control Bit

ARA05050

Data Sheet

September 19, 2016 • Skyworks Proprietary and Condential Information • Products and Product Information are Subject to Change Without Notice • 204227B

ELECTRICAL CHARACTERISTICS

Table 2: Absolute Minimum and Maximum Ratings

Table 3: Operating Ranges

Stresses in excess of the absolute ratings may cause permanent damage. Functional

operation is not implied under these conditions. Exposure to absolute ratings for

extended periods of time may adversely affect reliability.

The device may be operated safely over these conditions; however, parametric performance is

guaranteed only over the conditions dened in the electrical specications.

Notes:

1. Pins 3 and 26 should be AC-coupled. No external DC bias should be applied.

2. Pins 10, 11, 24 and 25 should be grounded or pulled to ground through a resistor. No

external DC bias should be applied.

3. Pins 6, 7, 8, 9, 20, 21, 22 and 23 should be AC-grounded. No external DC bias should

be applied.

PARAMETER MIN MAX UNIT

Analog Supply: V

SUP

(pins 4, 12, 18) 0 9 VDC

Amplifier Reference Voltages (pins 5, 19) -2.5 V

SUP

2VDC

RF Power at Amplifier Inputs (pins 10, 24)-+60 dBmV

Attenuator Controls (pins 13, 14, 15, 16) 0 6 V

Storage Temperature -55 +200 °C

Soldering Temperature -260 °C

Soldering Time - 5 Sec

PARAMETER MIN TYP MAX UNIT

Amplifier Supply: VDD (pins 4, 18) 4.5 5 7 VDC

Attenuator Supply: VATTN (pin 12) - 5 7 VDC

Attenuator Controls (pins 13, 14, 15, 16) 0 - 5.5 V

Amplifier Reference Voltages (pins 5, 19) -1.75 -VDC

Output Switch Control (pin 25) 0 - 5.5 V

Case Temperature -40 25 85 °C

ARA05050

Data Sheet

204227B • Skyworks Proprietary and Condential Information • Products and Product Information are Subject to Change Without Notice • September 19, 2016

Notes:

(1) See Figures 5 and 6 for performance at higher frequencies.

All specications as measured in test xture.

Table 4: DC Electrical Specications

TA=25°C; VDD, VATTn = +5.0 VDC

Table 5: AC Electrical Specications

TA=25°C; VDD, VATTn = +5.0 VDC

PARAMETERMINTYPMAXUNITCOMMENTS

Amplifier A1 Current (pin 4) -7595mA

Amplifier A2 Current (pin 18)-100130 mA

Attenuator Current (pin 12)-8-mA

To tal Power Consumption-0.92 1.2W

Thermal Resistance (θ

)-30 -C/W

Junction Temperature--140 C/W

PARAMETERMINTYPMAXUNITCOMMENTS

Gain (10 MHz) 31 32 33 dB 0 dB attenuation setting

Gain Flatness -0.751.5 dB 5 to 100 MHz

Gain Variation over Te mperature--0.006 -dB/°C

Attenuation Steps

2 dB

4 dB

8 dB

16 dB

1.6

3.8

8.0

16.0

1.85

4.0

8.3

16.6

2.2

4.2

8.5

17.0

dB 5 to 42 MHz (1),

Monotonic

2nd Harmonic Distortion Level

5 MHz

25 MHz

-60

-63

-55

-55dBc+58 dBmV into 75 Ohms

3rd Harmonic Distortion Level

5 MHz

25 MHz

-63

-60

-60dBc+58 dBmV into 75 Ohms

3rd Order Output Intercept78- -dBmV

1 dB Gain Compression Point-70 -dBmV

Noise Figure -1.7 2.5dB

ARA05050

Data Sheet

September 19, 2016 • Skyworks Proprietary and Condential Information • Products and Product Information are Subject to Change Without Notice • 204227B

Note: As measured in test xture

continued: AC Electrical Specications

TA=25°C; VDD, VATTn = +5.0 VDC

Table 6: Logic Interface Specications

TA=25°C; VDD, VATTn = +5.0 VDC

Note: “L” = logic low, “H” = logic high

Table 7: Attenuator Logic

Note:

(1) Specication applies when 470 Ohm resistor is connected from pin 2 to ground (see test circuit in Figure 4).

PARAMETER MIN TYP MAX UNIT COMMENTS

Output Noise Power

Active/No Signal/Min. Atten. Set.

Active/No Signal/Max. Atten. Set.

-dBmV Any 160 kHz bandwidth

from 5 to 42 MHz

Input Impedance --75 -Ohms

Input Return Loss --20 -15 dB 75  system

Output Impedance -75 -Ohms

Output Return Loss --20 -15 dB 75  system

PARAMETER MIN TYP MAX UNIT COMMENTS

Attenuator Control Logic

LOW

HIGH

2.8

0.5

5.5 VBypasses atten. stage

Enables atten. stage

Attenuator Control Impedance -5 K -Ohms

ATTENUATION (dB) 0246810 12 14 16 18 20 22 24 26 28 30

2 dB Logic Input (pin 16) L H L H L H L H L H L H L H L H

4 dB Logic Input (pin 15) L L H H L L H H L L H H L L H H

8 dB Logic Input (pin 14) L L L L H H H H L L L L H H H H

16 dB Logic Input (pin 13) L L L L L L L L H H H H H H H H

ARA05050

Data Sheet

204227B • Skyworks Proprietary and Condential Information • Products and Product Information are Subject to Change Without Notice • September 19, 2016

Figure 4: Test Circuit

227

GND

ISET1

ATTACG1

RF OUT1

ATTIN

VATTN

16 dB

8 dB 4 dB

ISET2

RF IN2

2 dB

RF IN

N/C

ATTOUT

VREF1

RF OUT2

ATTACG1

VREF2

ATTACG2

Bypass

N/C

(75 Ohms)

0.1uF

Output

(75 Ohms)

3.9 Ohms

8 dB

16 dB

+5 V

RF Input

+5 V

620 Ohms

0.1uF

0.01uF

1uF

0.01uF

ARA05050

10uH

0.01uF

1uF

620 Ohms

2 dB

4 dB

20 Ohms

1uF

0.1uF

0.8pF ±0.1pF

3.3K Ohms

1.8K Ohms

1000pF

5K Ohms

0.01uF

1uF

0.1uF

5K Ohms

+5 V 1uF

0.01uF

10uH

20 Ohms

3.3K Ohms

1.8K Ohms

1uF

0.1uF

470 Ohms

(see note)

Note:

The 470 Ohm resistor from pin 2 to ground is installed for 3V attenuator

control logic levels. For 5V logic, the 470 Ohm resistor is removed.

0.1 uF

0.01 uF

5K Ohms

0.01uF

VG2

(Not Used)

VG1

(Not Used)

ARA05050

Data Sheet

September 19, 2016 • Skyworks Proprietary and Condential Information • Products and Product Information are Subject to Change Without Notice • 204227B

PERFORMANCE DATA

Figure 5: S21 (0 - 16 dB Attenuation)

Figure 7: S11 - Log Scale Figure 8: S22 - Log Scale

Figure 9: S11 - Smith Chart Figure 10: S22 - Smith Chart

Figure 6: S21 (16 - 30 dB Attenuation)

ARA05050

Data Sheet

204227B • Skyworks Proprietary and Condential Information • Products and Product Information are Subject to Change Without Notice • September 19, 2016

Figure 12: Harmonic Performance

Figure 11: Attenuator Switching Speed - 16 dB Step

ARA05050

Data Sheet

September 19, 2016 • Skyworks Proprietary and Condential Information • Products and Product Information are Subject to Change Without Notice • 204227B

APPLICATION INFORMATION

Printed Circuit Board Layout Considerations

The ARA05050 is a high-performance RF device.

Special consideration must be given to certain features

of the the printed circuit board layout, as they can affect

the RF performance of the IC. Refer to the application

note “CATV Reverse Amp w/ Step Attenuator” for

more details.

Amplier Enable / Disable

TheARA05050 includes two amplication stages

that each can be shut down through external control

pins Vref1 and Vref2 (pins 5 and 19, respectively.)

By applying a typical bias of 1.75 Volts to these pins,

theampliersareenabled.Inordertofullydisable

anamplier,itscontrolpinrequiresanegativebias

of -1.5 to -2.0 Volts.

Amplier Bias Current

The Iset pins (11 and 25) set the bias current for the

amplication stages.  Grounding these pins results

in the maximum possible current. By placing a

resistor from the pin to ground, the current can be

reduced. The recommended bias conditions use the

conguration shown in the test circuit schematic in

Figure 4.

Thermal Layout Considerations

The device package for the ARA05050 features a

heat slug on the bottom of the package body. Use of

the heat slug is an integral part of the device design.

Soldering it to the ground plane of the PC board will

ensure the lowest possible thermal resistance for the

device, and will result in the longest MTF (mean time

to failure.)

APCboardlayoutthatoptimizesthebenetsofthe

heat slug is shown in Figure 13. The via holes located

under the body of the device must be plated through

to a ground plane layer of metal, in order to provide

sufcient thermal conductivity.  The recommended

solder mask outline is shown in Figure 14.

ESD Sensitivity

Electrostatic discharges can cause permanent damage

to this device. Electrostatic charges accumulate

on test equipment and the human body, and can

discharge without detection. Proper precautions and

handling are strongly recommended. Refer to the

application note on ESD precautions.

Figure 13: PC Board Layout

0.025 BSC 0.089 0.014 TY P

0.025 MIN.

0.099

0.197

0.163

0.386 REF .

0.152

REF .

BODY OUTLIN E

(NOMINAL )

0.070 0.150

0.060 TY P.

0.400

(12X)0.020 TO 0.060 DIA.

PLA TED THRU HOLES.

ARA05050

Data Sheet

204227B • Skyworks Proprietary and Condential Information • Products and Product Information are Subject to Change Without Notice • September 19, 2016

Figure 14: Solder Mask Outline

DIMENSIONS ARE IN INCHES

0.145

0.085

0.025 TYP .

0.016 TYP .

0.025 BSC

0.0535

0.242

0.163

0.098

0.091

ARA05050

Data Sheet

September 19, 2016 • Skyworks Proprietary and Condential Information • Products and Product Information are Subject to Change Without Notice • 204227B

Figure 15: S12 Package Outline - 28 Pin SSOP with Heat Slug

PACKAGE OUTLINE

ARA05050

Data Sheet

204227B • Skyworks Proprietary and Condential Information • Products and Product Information are Subject to Change Without Notice • September 19, 2016

COMPONENT PACKAGING

Figure 17: Tape Dimensions

Volume quantities of the ARA05050 are supplied on

tape and reel. Each reel holds 3,500 pieces. Smaller

quantities are available in plastic tubes of 50 pieces.

Figure 16: Reel Dimensions

ARA05050

Data Sheet

September 19, 2016 • Skyworks Proprietary and Condential Information • Products and Product Information are Subject to Change Without Notice • 204227B

ORDERING INFORMATION

ORDER NUMBER TEMPERATURE

RANGE

PACKAGE

DESCRIPTION COMPONENT PACKAGING

ARA05050S12CTR -40 to 85 0C28 Pin SSOP

with Heat Slug 3,500 piece tape and reel

ARA05050S12C -40 to 85 0C28 Pin SSOP

with Heat Slug Plastic tubes (50 pieces per tube)

ARA05050RS12P1 -40 to 85 0C

RoHS-compliant

28 Pin SSOP

with Heat Slug

3,500 piece tape and reel

ARA05050

Data Sheet

204227B • Skyworks Proprietary and Condential Information • Products and Product Information are Subject to Change Without Notice • September 19, 2016

NOTES

Data Sheet

204227B • September 19, 2016

ARA05050

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Skyworks Proprietary and Condential information • Products and Product Information are Subject to Change Without Notice