AD8321: Gain Programmable CATV Line Driver
The AD8321 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 ...More
AD8321: Gain Programmable CATV Line Driver
Product Description
The AD8321 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 AD8321 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.
An evaluation board is available for this product and may be ordered using the following product number: AD8321-EVAL. Schematic and layout for this evaluation board is contained in the product datasheet.
Features
- Linear in dB Gain Response Over >53 dB Range
- Drives Low Distortion >11 dBm Signal into 75 Ω Load: –53 dBc SFDR at 42 MHz
- Very Low Output Noise Level
- Maintains Constant 75 Ω Output Impedance
Power-Up and Power-Down Condition
No Line Transformer Required
- Upper Bandwidth:
235 MHz (Min Gain) - 9 V Single Supply Operation
- Power-Down Functionality
- Supports SPI Interface
- Low Cost
Diagrams
- Enlarge
- Другие диаграммы
- Обозначения и трафареты для печатной платы
Functional Block Diagram for AD8321
Gain Programmable CATV Line Driver
Другие диаграммы для AD8321
Gain Programmable CATV Line Driver
AD8321 Pin Configuration
Functional Block Diagram for AD8321
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| Part# | Gain Control | -3 dB BW (MHz) | Gain Low End (dB) | Gain High End (dB) | Number of Channels | Spectral Noise (nV/rtHz) | Supply Voltage (V) | Supply Current (max) | Gain Accuracy (dB) | 1 dB Comp Point (dBm) | Package | Price* (1000-4999) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| AD600 | Analog | 35 | 0 | +40 | 2 | 1.4 | ±5 | 14mA | - | - | - | $16.61 |
| AD602 | Analog | 35 | -10 | +30 | 2 | 1.4 | ±5 | 14mA | - | - | - | $13.36 |
| AD603 | Analog | 90 | -11 | +31 | 1 | 1.4 | ±5 | 20mA | ±0.5 | - | 8-Lead DIP, 8-Lead SOIC | $4.40 |
| AD604 | Analog | 40 | 0 | +48 | 2 | 0.8 | ±5 | 31mA | ±0.3 | 15 | 24-Lead SOIC, 24-Lead SSOP | $16.45 |
| AD605 | Analog | 40 | -14 | +34 | 2 | 1.8 | +5 | 23mA | ±0.2 | 15 | 16-Lead SOIC | $9.91 |
| AD8260 | Digital | 180 | -6 | +24 | 1 | 2.4 | +3.3 | 28mA | +0.25 | - | - | $3.84 |
| AD8320 | Digital | 150 | -10 | +26 | 1 | 53 | +12 | 105mA | ±0.2 | 22.5 | 20-Lead SOIC | - |
| AD8321 | Digital | 120 | -27.4 | +26 | 1 | 20 | +9 | 90mA | ±1 | 19.5 | 20-Lead SOIC | $4.40 |
| AD8322 | Digital | 180 | -12.6 | +29.5 | 1 | 64 | +5 | 113mA | ±2 | 19 | 28-Lead TSSOP | $3.19 |
| AD8323 | Digital | 100 | -26 | +27.5 | 1 | - | +5 | - | - | - | 28-Lead TSSOP | $3.34 |
| AD8324 | Digital | 100 | -25.5 | +33.5 | 1 | 157 | +3.3 | 207mA | ±1 | 21 | 20-Lead LFCSP, 20-Lead QSOP | $1.73 |
| AD8325 | Digital | 100 | -29.5 | +30 | 1 | 56 | +5 | 133mA | ±1 | 18.5 | 28-Lead TSSOP | $3.34 |
| AD8326 | Digital | 100 | -26 | +27.5 | 1 | 100 | ±5 | 157mA |