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| Telephony Reverse Amplifier with Step Attenuator Product Brief - Rev 0 ARA3000S23 FEATURES * * * * * * Attenuation Range: 0-56 dB, adjustable in 2 dB increments via a serial 3 wire control Meets DOCSIS distortion requirements at +60 dBmV output signal level Low noise figure Low cost integrated monolithic GaAs amplifier with step attenuator +5V Operation Power saving shutdown capability APPLICATIONS DOSIS Compliant IP Telephony Systems. CATV Interactive Set-Top Box Home Gateway * * * Ordering Information ARA3000 S23 -40 to +850 C 28 PIN SSOP PACKAGE Description The ARA3000 is a GaAs IC designed to provide additional reverse path amplification and isolation in IP Telephony Systems. The precision step attenuator can be digitally controlled to set the output power to the desired level. The single amplifier stage at the output is capable of meeting both the DOCSIS distortion and noise requirements from a single +5V supply. In addition, the output amp can be shut down and bypassed by an on chip switch to save power. The ARA3000 is supplied in a 28-pin SSOP package featuring an exposed paddle on the bottom of the package. Soldering the exposed paddle to the ground plane of the PC board ensures the lowest possible thermal resistance for the IC resulting in a long MTF. 3 20 10 27 2 1 28 22 24 sw bias 9 4-6 1 1 attn in gnd +5V 2 2 26 23 5 BIT ATTENUATOR attn out c1 32 32 / 16 / 8 / 4 / 2 dB 16 8 4 c2 2 32 11 19 1 1 +3V 16 8 4 2 D1 2 2 CMOS gnd SERIAL to PARALLEL D0 clk data enable CO C1 12 13 14 15 16 17 18 7-8 21 25 Figure 1: Functional Block Diagram ARA3000S23 D C Electrical Specifications (TA=250C , Vdd=+5V, Vdd C MOS=+3V) PAR AMETER C urrent C onsumpti on +5V +5V +3V TYP 12 120 2 U N IT mA mA mA C OMMEN TS Ampli fi er D i sabled Ampli fi er Enabled Max Attenuati on Setti ng AC Electrical Specifications (TA=250C , Vdd=+5V, Vdd C MOS=+3V) PAR AMETER TYP 16 Gai n -1.7 Gai n Flatness Gai n vari ati on over temp Attenuati on Step Si zes 2 dB 4 dB 8 dB 16 dB 32 dB 2nd Harmoni c Level 0.5 -0.006 1.7 3.9 8.1 15.9 30.7 -55 -60 -60 -60 -60 3.5 75 -12 dB dB dB/C dB dB dB dB dB dB c dB c dB c dB c dB dB ohms dB Pout = +60 dBmV (amp enabled) Pi n = + 58 dBmV (amp di sabled) Pout = +60 dBmV (amp enabled) Pi n = + 58 dBmV (amp di sabled) Attenuator setti ng of 62 dB and amp di sabled Attenuator setti ng of 0 dB and amp enabled U N IT dB C OMMEN TS Attenuator setti ng @ 0 dB Ampli fi er enabled Attenuator setti ng @ 0 dB Ampli fi er di sabled (bypassed) 5 to 42 MHz 3rd Harmoni c Level Maxi mum Isolati on Noi se Fi gure Input & Output Impedance Input & Output Return Loss ANADIGICS, Inc. 35 Technology Drive Warren, New Jersey 07059 Tel: (908) 668-5000 Fax: (908) 668-5132 http://www.anadigics.com Mktg@anadigics.com IMPORTANT NOTICE ANADIGICS, Inc. reserves the right to make changes to its products or discontinue any product at any time without notice. The Advanced Product data sheets and product specifications contained in this data sheet are subject to change prior to a products formal introduction. The information in this data sheet has been carefully checked and is assumed to be reliable. However, ANADIGICS assumes no responsibility for inaccuracies. ANADIGICS strongly urges customers to verify that the information they are using is current before placing orders. WARNING ANADIGICS products are not intended for use in life support appliances, devices, or systems. Use of an ANADIGICS product in any such application without written consent is prohibited. 2 |
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