(Hong Kong)
Product Summary
The AD8325ARUZ is a low-cost, digitally controlled, variable gain amplifier optimized for coaxial line driving applications such as cable modems that are designed to the MCNS-DOCSIS upstream –50 standard. An 8-bit serial word determines the desired output gain over a 59.45 dB range resulting in gain changes of 0.7526 dB/LSB. –52. The AAD8325ARUZ comprises a digitally controlled variable attenuator –54 of 0 dB to –59.45 dB, which is preceded by a low noise, fixed gain buffer and is followed by a low distortion high power amplifier. The AD8325ARUZ accepts a differential or single-ended input signal. The output is specified for driving a 75 W load, such as coaxial cable. The AD8325ARUZ is packaged in a low-cost 28-lead TSSOP, operates from a single 5 V supply, and has an operational temperature range of –40°C to +85°C. The AD8325ARUZ can be applied in gain programmable line driver, interactive cable set-top boxes, pc plug-in cable modems, and general-purpose digitally controlled variable gain block.
Parametrics
AD8325ARUZ absolute maximum ratings: (1)Supply Voltage +VS Pins 5, 9, 10, 19, 20, 23, 27: 6 V; (2)Input Voltages Pins 25, 26: ±0.5 V; (3)Internal Power Dissipation TSSOP: 0.9 W; (4)Operating Temperature Range: –40°C to +85°C; (5)Storage Temperature Range: –65°C to +150°C; (6)Lead Temperature, Soldering 60 seconds: 300°C.
Features
AD8325ARUZ features: (1)supports docsis standard for reverse path transmission; (2)gain programmable in 0.75 db steps over a 59.45 db range; (3)low distortion at 61 dbmv output; (4)output noise level; (5)maintains 75 Ω output impedance; (6)upper bandwidth: 100 MHz (full gain range) ; (7)5 v supply operation ; (8)supports spi interfaces.
Diagrams
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 AD8325ARUZ |
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IC LN DVR CATV FINE-STEP 28TSSOP |
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AD8325ARUZ-REEL |
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IC LN DVR CATV FINE-STEP 28TSSOP |
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