ARA1400

Features:

• Low cost integrated monolothic GaAs amplifierwith step attenuator
• Attenuation Range: 0-56 dB, adjustable in4 dB increments via a 4 wire parallel control
• Meets DOCSIS distortion requirements at+60 dBmV output signal level
• Low distortion and low noise
• Frequency range: 5-100 MHz
• 5 Volt operation
• 0 to +85 temperature range


Application

• MCNS/DOCSIS Compliant Cable Modems
• CATV Interactive Set-Top Box
• Telephony over Cable Systems
• OpenCable Set-Top Box
• Residential Gateway


Pinout




Specifications

PARAMETER	MIN	MAX	UNIT
Analog Supply: VSUP (pins 4, 12, 17)	0	9	VDC
Amplifier Reference Voltages (pins 5, 18)	-2.5	VSUP 2	VDC
RF Power at Amplifier Inputs (pins 10, 26)	-	+60	dBmV
Attenuator Controls (pins 13, 14, 15, 16)	0	6	V
Output Switch Control (pin 25)	0	6	V
Storage Temperature	-55	+200	°C
Soldering Temperature	-	260	°C

Description

The ARA1400 is a GaAs IC designed to provide thereverse path amplification and output level controlfunctions in a CATV Set-Top Box or Cable Modem. ARA1400 incorporates a digitally controlled precision stepattenuator that is preceded by an ultra low noiseamplifier stage, and followed by an ultra-linearoutput driver amplifier. ARA1400 is capable ofmeeting the MCNS/DOCSIS requirements forharmonic performance at a +60dBmV output levelwhile requiring only a single polarity +5V supply.Both the inputandthe output are single-ended andmatched to 75 Ohms, and a precision attenuatorprovides up to 56 dB of attenuation in 4 dBincrements. ARA1400 is offered in a 28-pin SSOPpackage featuring a heat slug on the bottom of thepackage.