(Hong Kong)
Product Summary
The AD8321ARZ is a low cost digitally controlled variable gain amplifier optimized for coaxial line driving applications such as cable modems that are designed to the DOCSIS (upstream) standard. An 8-bit serial word determines the desired output gain over a 53.4 dB range, resulting in gain changes of 0.75 dB/LSB. The AD8321ARZ comprises a digitally controlled variable attenuator of 0 dB to –53.4 dB, which is preceded by a low noise, fixed gain buffer and followed by a low distortion high power amplifier. The AD8321ARZ accepts a differential or single-ended input signal. The output is specified for driving a 75 W load, such as coaxial cable, although the AD8321ARZ is capable of driving other loads. Performance of –53 dBc is achieved with an output level up to 11 dBm at 42 MHz bandwidth using a 9 V supply. The AD8321ARZ is packaged in a low cost 20-lead SOIC, operates from a single +9 V supply, and has an operational temperature range of –40°C to +85°C. The AD8321ARZ can be applied in gain programmable line driver, hfc high speed data modems, interactive catv set-top boxesm catv plant test equipment, and general purpose if variable gain block.
Parametrics
AD8321ARZ absolute maximum ratings: (1)Supply Voltage +VS Pins 7, 8, 9, 17, 20: +11 V; (2)Input Voltages Pins 18, 19: ±0.5 V ; (3)Operating Temperature Range: –40°C to +85°C; (4)Storage Temperature Range: –65°C to +150°C; (5)Lead Temperature, Soldering 60 seconds: +300°C.
Features
AD8321ARZ features: (1)linear in db gain response over >53 dB range; (2)drives low distortion >11 dBm Signal into 75 Ω Load: -53 dBc SFDR at 42 MHz; (3)very low output noise level; (4)maintains constant 75Ω output impedance; (5)upper bandwidth: 235 mhz (min gain) ; (6)9 v single supply operation ; (7)power-down functionality ; (8)supports spi interface ; (9)low cost.
Diagrams
| Image | Part No | Mfg | Description |  |
Pricing (USD) |
Quantity | ||||
|---|---|---|---|---|---|---|---|---|---|---|
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 AD8321ARZ |
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IC LINE DRIVER CATV 3.3V 20SOIC |
Data Sheet |
Negotiable |
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AD8321ARZ-REEL |
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IC LINE DVR CATV 20-SOIC T/R |
Data Sheet |
Negotiable |
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