AD9848AKST

Overview

The AD9848AKST is a highly integrated CCD signal processor designed for digital still camera applications. It features a complete analog front end with a 10-bit, 20 MHz A/D converter, Correlated Double Sampler (CDS), Pixel Gain Amplifier (PxGA), and Variable Gain Amplifier (VGA). The device includes an on-chip timing driver with Precision Timing core for 1 ns resolution clock adjustment. It operates within a temperature range of -20°C to +85°C and is housed in a 48-lead LQFP package.

Feature Summary

• Integrates a 10-bit A/D converter with CDS, PxGA, and VGA for high-quality signal processing.
• Includes a Precision Timing core allowing precise adjustment of high-speed clocks with approximately 1 ns resolution.
• Features an on-chip timing driver providing horizontal and reset gate clock outputs directly to the CCD.

Applications

• Digital Still Cameras

Procurement Notes

Verify the specific ordering suffix against official Analog Devices documentation to confirm package type and temperature range. Ensure compatibility with system voltage requirements, as the AD9848 requires 3.0 V digital supplies for data outputs. Confirm lead status and availability through authorized distributors prior to design finalization.

Selection Notes

Select the AD9848AKST when a 10-bit resolution and 20 MHz pixel rate are sufficient for the application. Compare against the AD9849 if higher 12-bit resolution or 30 MHz speed is required. Verify that the 3.0 V digital supply capability meets the system's logic level constraints compared to the AD9849's 5 V support.

Part Context

The AD9848 is part of the AD9848/AD9849 family of CCD signal processors from Analog Devices. These devices are engineered to provide a compact solution for image capture systems by combining signal conditioning and timing generation into a single component, reducing board space and design complexity.

Replacement Considerations

The AD9849AKST is a pin-compatible alternative offering 12-bit resolution and 30 MHz operation. Verify voltage supply differences, as the AD9849 supports 5 V H-drivers while the AD9848 is limited to 3 V.