AD8324 is a low-cost amplifier designed for coaxial line driving. It supports DOCSIS 2.0 and Euro-DOCSIS standards and has programmable gain in 1 dB steps over a range of 59 dB. It has low distortion with -59 dBc SFDR at 21 MHz and -54 dBc SFDR at 65 MHz output at 61 dBmV. The output noise level at minimum gain is 1.3 nV/√Hz. It maintains a 75 Ω output impedance in TX-enable and Transmit-disable condition. The upper bandwidth is 100 MHz (full gain range). It supports 3.3 V supply operation and SPI interfaces.
The AD8324 is a low‑cost 3.3 V upstream cable line driver designed for DOCSIS 2.0 and Euro‑DOCSIS applications. It offers digitally programmable gain in 1 dB steps over a 59 dB range, low distortion, and a 75 Ω output impedance suitable for coaxial and twisted‑pair drivers.
The document lists detailed electrical specifications, logic input levels, timing requirements, absolute maximum ratings, pin configurations, typical performance curves, and an ordering guide with package options. It also includes mechanical dimensions for the LFCSP and QSOP packages.
| Supply Voltage | 3.3 V |
|---|---|
| Input Resistance (Single‑Ended) | 550 Ω |
| Input Resistance (Differential) | 1100 Ω |
| Input Capacitance | 2 pF |
| Voltage Gain Range | 58–60 dB |
| Maximum Output Power | 61 dBmV |
| Quiescent Current (Max Gain) | 207 mA |
| Operating Temperature (LFCSP) | -40 °C to +85 °C |
The AD8324 operates from a single 3.3 V supply.
Gain is programmable in 1 dB steps over a 59 dB range, giving 60 possible gain codes.
The device can deliver up to 61 dBmV AC output.