AD8325: 5 V CATV Line Driver Fine Step Output Power Control
The AD8325 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 standard. ...More
AD8325: 5 V CATV Line Driver Fine Step Output Power Control
Product Description
The AD8325 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 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.
The AD8325 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.
An evaluation board is available for this product and may be ordered using the following product number AD8325-EVAL.
Features
- Supports DOCSIS Standard for Reverse Path Transmission
- Gain Programmable in 0.75 dB Steps Over a 59.45 dB Range
- Low Distortion at 61 dBmV Output
–57 dBc SFDR at 21 MHz
–55 dBc SFDR at 42 MHz
- Output Noise Level: –48 dBmV in 160 kHz
- Maintains 75Ω Output Impedance
Transmit Enable and Transmit Disable Modes - Upper Bandwidth:100 MHz (Full Gain Range)
- 5 V Supply Operation
- Supports SPI Interfaces
Diagrams
- Enlarge
- Other Diagrams
- Symbols and Footprints
Functional Block Diagram for AD8325
5 V CATV Line Driver Fine Step Output Power Control
Other Diagrams for AD8325
5 V CATV Line Driver Fine Step Output Power Control
Pin Configuration for AD8325
Functional Block Diagram for AD8325
| Part# | Application | Function | Voltage Supply (V) | Minimum Gain (Acl) | -3 dB BW (MHz) | Slew Rate (V/us) | Iout Drive (mA) | Distortion (dBc) | Spectral Noise (nV/rtHz) | Price* (1000-4999) |
|---|---|---|---|---|---|---|---|---|---|---|
| AD45048 | DSL | Driver | +/- 6, 12 | - | 65 | 55 | 230 | -80 | - | $2.32 |
| AD8320 | Cable | CATV Line Driver | 5 to 12 | n/a | 150 | n/a | n/a | -57 | 53 | - |
| AD8322 | Cable | CATV Line Driver | 5 | - | 180 | - | - | -58 | 64 | $3.19 |
| AD8324 | Cable | CATV Line Driver | 3.3 | - | 100 | - | - | -59 | 157 | $1.73 |
| AD8325 | Cable | CATV Line Driver | 5 | - | 100 | - | - | -57 | 56 | $3.34 |
| AD8326 | Cable | CATV Line Driver | 7 to 12 | - | 100 | - | - | -57 | 100 | $3.95 |
| AD8327 | Cable | CATV Line Driver | 5 | - | 160 | - | - | -63 | 64 | $3.80 |
| AD8328 | Cable | CATV Line Driver | 5 | - | 107 | - | - | -57 | 135 | $1.92 |
| AD8390 | DSL | Driver | +/- 12 | 5 | 100 | 300 | 400 | -82 | 8 | $2.29 |
| AD8391 | DSL | Driver | +/- 6 | 1 | 60 | 600 | 175 | -80 | 4 | $2.13 |
| AD8392 | DSL | Driver | +/- 12 | 1 | 65 | 900 | 400 | -82 | 4 | $3.94 |
| AD8393 | DSL | Driver | 12 | 5 | 100 | - | 500 | -73 | 4 | - |
| ADA4304-2 | - | Active RF Splitter | - | - | 1600 | - | - | -62 | - | $0.70 |
| ADA4310-1 | - | - | - | 1 | 190 | 820 | - | -69 | 2.85 | $1.45 |
* The pricing listed here is provided only for budgetary purposes as recommended list price in U.S.
Dollars in the United States ex factor per unit for the stated volume. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
** Pricing is currently unavailable. Click on the product number to see the Product Page for additional information.
AD8325 Model Options
| Model | Status | Package | Pins | Temp. Range |
Price* (1000 pcs.) |
Production** Availability |
ROHS Compilant | Samples Cart | Purchase Cart |
|---|---|---|---|---|---|---|---|---|---|
| AD8325-EVAL | Prodn | Evaluation Boards | - | Comm. | - | 11/07/2008 | N | Contact ADI | Add To Cart |
| AD8325ARU | Prodn | 28 ld TSSOP | 28 | Ind | $3.67 | 09/12/2008 |
N
Material Declaration |
Contact ADI | Add To Cart |
| AD8325ARU-REEL | Prodn | 28 ld TSSOP | 28 | Ind | $3.67 | - |
N
Material Declaration |
Contact ADI | Add To Cart |
| AD8325ARUZ | Prodn | 28 ld TSSOP | 28 | Ind | $3.34 | 09/12/2008 |
Y
Material Declaration |
Contact ADI | Add To Cart |
| AD8325ARUZ-REEL | Prodn | 28 ld TSSOP | 28 | Ind | $3.34 | 09/12/2008 |
Y
Material Declaration |
Contact ADI | Add To Cart |
Help
- Pre-Release: The model has not been released to general production, but samples may be available.
- Production: The model is currently being produced, and generally available for purchase and sampling.
- Last Time Buy: The model has been scheduled for obsolescence, but may still be purchased for a limited time.
- Obsolete: The specific part is obsolete and no longer available. Other models listed in the table may still be available (if they have a status that is not obsolete).
For detailed drawings and chemical composition please consult our Package Site
- Commercial: 0 to +70 degrees Celsius
- Military : -55 to +125 degrees Celsius
- Industrial: Temperature ranges may vary by model. Please consult the datasheet for more information.
- Automotive: -40 to +125 degrees Celsius
Sample availability may be better than production availability. Please enter samples into your cart to check sample availability.
*The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
**Sample availability may be better than production availability. Please enter samples iinto your cart to check sample availability.

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