Overview
The AD8328ARQZ, produced by Analog Devices Inc., is a low-cost amplifier specifically designed for coaxial line driving applications. This component is primarily intended for use in Data Over Cable Service Interface Specification (DOCSIS)-certified cable modems and EuroDOCSIS cable modems. It operates on a 5 V supply and supports SPI interfaces, making it suitable for various cable television (CATV) and telephony applications.
Key Specifications
| Parameter | Value |
|---|---|
| Supply Voltage | 5 V |
| Output Impedance | 300 Ω (Tx-enable and Tx-disable condition) |
| Upper Bandwidth | 107 MHz (full gain range) |
| Input Impedance (Single-ended) | 800 Ω |
| Input Impedance (Differential) | 1.6 kΩ |
| Gain Range | −28 dB to +31 dB (steps of 1 dB per LSB) |
| Package Type | 20-SSOP (0.154", 3.90mm Width) |
| Mounting Type | Surface Mount |
| RoHS Status | Non-RoHS Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Key Features
- Digitally controlled gain with an 8-bit serial interface, allowing for precise control over the output signal level.
- Programmable gain range of −28 dB to +31 dB with steps of 1 dB per least significant bit (LSB).
- Supports SPI interfaces for serial data transfer.
- Low power sleep mode, reducing supply current to 20 μA when powered down.
- External bypass and ramp capacitor options for additional control.
- Supply current scaling with gain code, reducing power consumption at lower gain settings.
Applications
- DOCSIS and EuroDOCSIS cable modems.
- CATV set-top boxes.
- CATV telephony modems.
- Coaxial and twisted pair line drivers.
Q & A
- Q: What is the primary application of the AD8328ARQZ?
A: The AD8328ARQZ is primarily used in DOCSIS and EuroDOCSIS cable modems, as well as in CATV set-top boxes and telephony modems.
- Q: What is the supply voltage of the AD8328ARQZ?
A: The AD8328ARQZ operates on a 5 V supply voltage.
- Q: What is the output impedance of the AD8328ARQZ?
A: The output impedance of the AD8328ARQZ is 300 Ω in both Tx-enable and Tx-disable conditions.
- Q: How is the gain controlled in the AD8328ARQZ?
A: The gain of the AD8328ARQZ is digitally controlled through an 8-bit serial interface.
- Q: What is the gain range of the AD8328ARQZ?
A: The gain range of the AD8328ARQZ is from −28 dB to +31 dB, with steps of 1 dB per least significant bit (LSB).
- Q: Does the AD8328ARQZ support low power modes?
A: Yes, the AD8328ARQZ has a low power sleep mode that reduces the supply current to 20 μA when powered down.
- Q: What package type is the AD8328ARQZ available in?
A: The AD8328ARQZ is available in a 20-SSOP package.
- Q: Is the AD8328ARQZ RoHS compliant?
A: No, the AD8328ARQZ is not RoHS compliant.
- Q: What is the moisture sensitivity level (MSL) of the AD8328ARQZ?
A: The MSL of the AD8328ARQZ is 1 (Unlimited).
- Q: Is the AD8328ARQZ still in production?
A: No, the AD8328ARQZ is marked as obsolete.
