Analog Devices Inc. AD9801JCST

The AD9801 processes a CCD pixel waveform through correlated double sampling, a variable-gain amplifier, black-level correction and a 10-bit converter. It provides the sampling clocks, input clamp and on-chip reference needed for a compact electronic-camera analog front end. Its parallel data outputs feed a downstream digital image processor.

ADI describes a 48-pin thin quad flatpack (TQFP) for the AD9801. The LCDChip record and local registry use 48-LQFP and map it to 48-LQFP.jpg. Confirm that the exact JCSTRL order code uses the manufacturer outline and check pin-one, lead pitch and body dimensions before PCB release.

Layout checks

• Compare the ADI 48-lead TQFP drawing with the board footprint.
• Place analog bypass and reference capacitors close to their respective pins.
• Separate noisy digital outputs from CCD input and reference traces.

The registered local package JPG is missing; do not publish until the image and footprint are reviewed.

The AD9801 Rev. 0 pin-function table groups the 48 leads as follows; use the full ADI top-view diagram for placement and polarity.

Do not infer electrical connectivity from similar CCD processors; follow the exact AD9801 pin table and decoupling notes.

Specifications refer to the AD9801 Rev. 0 datasheet, primarily at 3.15 V supplies. Confirm the full JCSTRL ordering suffix and applicable lot documentation.

Any replacement must match CDS timing, CCD input range, PGA control, black-level loop, 10-bit output format, 18 MSPS throughput, +3 V supplies, 48-lead mechanical outline and host timing. A newer camera front end may need both hardware and firmware changes.

No internal alternative-product link is shown because no verified pin-, timing- and performance-compatible replacement with a confirmed LCDChip product URL was established.

Analog Devices published the AD9801 Rev. 0 datasheet for a 10-bit CCD processor and currently marks the base product obsolete. The document describes a 48-pin TQFP. Confirm the JCSTRL suffix, packaging format, original markings and supply chain with a qualified supplier.

For this obsolete device, verify the exact ordering code, package marking, lot traceability, storage and ESD handling. Public listings show differing stock figures and mostly RFQ or secondary prices; the existing catalog stock and price are not a confirmed current offer.

Before using this obsolete part, review CCD waveform levels, SHP/SHD and ADCCLK timing, black-pixel clamp sequencing, gain-control range, reference bypass, output loading and the exact 48-lead footprint. Missing package imagery and unverified exact-code pricing prevent publication.