The AD9945 is a complete analog signal processor for CCD applications. It features a 40 MHz single-channel architecture specifically designed to sample and condition the outputs of interlaced and progressive CCD sensors.
The AD9945 is a complete analog signal processor for CCD applications. It integrates a correlated double sampler, a digitally controlled variable‑gain amplifier, a black‑level clamp circuit and a 12‑bit A/D converter, all powered from a single 3 V supply.
The device is supplied in a 32‑lead LFCSP package, operates from 2.85 V to 3.6 V, and consumes about 160 mW in normal operation. It provides a 3‑wire serial digital interface for programming registers and supports up to 40 MHz sampling rates.
| Maximum Clock Rate | 40 MHz |
|---|---|
| Power Consumption (Normal Operation) | 160 mW |
| Operating Temperature Range | -20 °C to +85 °C |
| Supply Voltage (Analog, Digital, Driver) | 2.85 V to 3.6 V |
| Resolution | 12 bits |
| VGA Gain Control Resolution | 1024 steps |
The AD9945 operates from 2.85 V to 3.6 V.
The VGA gain control has a resolution of 1024 steps.
The maximum SCK frequency for the serial interface is 10 MHz.
A single continuous ground plane is recommended for the device.