AD9891KBC

Overview

The AD9891KBC is a highly integrated CCD signal processor designed for digital imaging applications. It features a complete analog front end with a 10-bit, 20 MHz A/D converter and a full-function programmable timing generator utilizing Precision Timing technology. The device includes a Correlated Double Sampler (CDS), Pixel Gain Amplifier (PxGA), Variable Gain Amplifier (VGA), and black level clamp. It operates over an extended temperature range of –20°C to +85°C and is housed in a 64-lead CSPBGA package.

Feature Summary

• Integrates a 10-bit A/D converter capable of processing signals at pixel rates up to 20 MHz.
• Includes on-chip drivers for horizontal clocks and reset gate, eliminating the need for external buffer amplifiers.
• Features a Precision Timing core that allows high-speed clock adjustment with nanosecond resolution.
• Provides a complete analog front end with CDS, PxGA, VGA, and black level clamping functions.

Applications

• Digital Still Cameras
• Digital Video Camcorders
• Industrial Imaging Systems

Procurement Notes

Verify the specific suffix KBC confirms the industrial temperature range and CSPBGA package configuration. Confirm compatibility with the system's serial interface requirements and power supply voltages before integration. Check for obsolescence status as this component may be superseded by newer generations within the product family.

Selection Notes

Select the AD9891KBC when a 10-bit resolution and 20 MHz maximum sampling rate are sufficient for the application. Choose this model over the AD9895 if lower power consumption and reduced cost are prioritized over higher speed and 12-bit precision. Ensure the design supports the required 3-wire serial interface for timing configuration.

Part Context

The AD9891KBC belongs to the AD9891/AD9895 family of CCD signal processors from Analog Devices. This series is engineered to simplify the interface between CCD sensors and digital image processors by combining analog signal conditioning with precise timing generation in a single integrated circuit.

Replacement Considerations

Public confirmed substitute part numbers: AD9895KBC.