The AD9845B is a 12-bit 30MSPS CCD signal processor featuring pin compatibility with AD9845A designs, a 12-bit 30MSPS A/D converter, a 30MSPS correlated double sampler (CDS), 4dB~6dB 6-bit pixel gain amplifier (PxGA®), 2dB to 36dB 10-bit variable gain amplifier (VGA), low noise clamp circuits, preblanking function, auxiliary inputs with VGA and input clamp, a 3-wire serial digital interface, 3V single-supply operation, low power: 153mW @ 3V supply, and a space-saving 48-lead LQFP package.
The AD9845B is an improved 12‑bit, 30 MSPS CCD signal processor designed for high‑performance digital still cameras and industrial/scientific imaging. It integrates a correlated double sampler, pixel gain amplifier (PxGA), variable gain amplifier (VGA), black‑level clamp, and a 12‑bit A/D converter, all programmable via a 3‑wire serial digital interface.
The device operates from a single 3 V supply, dissipates only 153 mW in normal mode, and is offered in a space‑saving 48‑lead LQFP package. Detailed specifications include temperature range, power consumption, clock rates, input/output voltage levels, and pin configurations for easy integration into imaging systems.
| Resolution | 12 Bits |
|---|---|
| Maximum Clock Rate | 30 MHz |
| Power Consumption (Normal Operation) | 153 mW |
| Supply Voltage (Analog/Digital) | 2.7 – 3.6 V |
| Operating Temperature Range | -20 °C to +85 °C |
| Standby Power | 5 mW |
| Total Power‑Down | 0.5 mW |
| PxGA Gain Range | -2.5 dB to 9.5 dB |
The device operates from –20 °C to +85 °C.
Typical power consumption is 153 mW at a 3 V supply.
Registers are programmed through a 3‑wire serial digital interface.
The AD9845B is supplied in a 48‑lead LQFP package.