Analog Devices Inc. AD9995KCP

Overview

AD9995KCP from Analog Devices is a 12-bit CCD signal processor with integrated Precision Timing™ generator, designed for digital still cameras and camcorders. It combines correlated double sampling (CDS), 6 dB to 42 dB VGA, 12-bit 36 MHz ADC, black level clamp, and full on-chip timing generation-including 6-phase vertical clocks, RG, H1–H4, VSG1–VSG5, SUBCK, and VSUB-enabling direct CCD interface in compact imaging systems.

For engineers reviewing the AD9995KCP datasheet, AD9995KCP pinout, AD9995KCP application, or AD9995KCP equivalent, key selection considerations include its <600 ps timing resolution at 36 MHz, 56-lead LFCSP package, programmable shutter control (MSHUT/STROBE), 3-wire serial interface, and support for both master and slave sync modes in industrial and consumer imaging designs.

Technical Context

The AD9995KCP implements a dedicated Precision Timing core synchronized to CLI (up to 36 MHz), dividing each pixel period into 48 programmable edge positions for sub-ns clock placement. It supports dual-mode operation: master mode (generating HD/VD from CLI + internal sync) and slave mode (synchronizing to external HD/VD).

All high-speed outputs-RG, H1–H4, SHP, SHD-are fully programmable for rising/falling edge location and polarity; H2/H4 are hardwired inverses of H1/H3. The AFE chain includes DC restore, CDS with 500 mV reset transient tolerance, 10-bit VGA gain control (1024 steps), and optical black clamp with 256-level resolution.

Key Specifications

Pinout & Package

AD9995KCP is housed in a 56-lead LFCSP (CP-56) package with exposed thermal pad, optimized for thermal performance on 4-layer PCBs (θ_JA = 25°C/W). Pin 1 identifier located top-left; pins arranged in dual-row configuration with analog, digital, power, and high-drive outputs segregated per functional domain.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar CCD signal processor applications.

Compared with AD9995KCP, AD9994KCP offers lower cost and power but sacrifices 2 bits of resolution and substrate-level control, while TDC1308DAP provides higher resolution at the expense of full system integration, increased layout complexity, and loss of Precision Timing™ programmability.

Availability

AD9995KCP is available at Aetrix Electronics and suitable for digital still cameras, industrial imaging systems, and machine vision inspection requiring stable component supply, long-term lifecycle support, and traceable sourcing for production programs.

Supply support for AD9995KCP includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.

The AD9995KCP belongs to Analog Devices' Precision Timing™ CCD signal processor product line, engineered specifically for high-fidelity, low-jitter digitization and programmable clock generation in portable and embedded imaging applications.

FAQ

What is the maximum supported pixel clock frequency for the AD9995KCP?

The AD9995KCP supports a maximum CLI (clock input) frequency of 36 MHz, as specified in the Absolute Maximum Ratings and confirmed in the Timing Specifications table. This enables real-time digitization of high-resolution CCD sensors with up to 4095 pixels per line. Operation above 36 MHz is not guaranteed and may result in timing violations or AFE performance degradation. The AD9995KCP's Precision Timing™ core maintains <600 ps resolution even at this maximum rate.

Does the AD9995KCP include on-chip drivers for all CCD clock signals?

The AD9995KCP integrates on-chip drivers for RG and H1–H4 outputs, each programmable up to 30 mA, but does not include drivers for V1–V6, VSG1–VSG5, SUBCK, or VSUB. These vertical and substrate signals require external V-driver circuitry as explicitly stated in the System Overview and Pin Function Descriptions. The AD9995KCP's HVDD and RGVDD supplies power the integrated H- and RG-drivers, while vertical timing outputs are CMOS-level and must be buffered externally.

How is black level clamping implemented in the AD9995KCP?

The AD9995KCP implements optical black clamp using dedicated CLPOB and PBLK signals, with 256-level resolution (8-bit control) and programmable timing per V-sequence group. Clamp level is measured at the ADC output and adjustable from 0 to 255 LSB. The AFE applies DC restore before CDS, and clamp operation is synchronized to pixel-level timing via the Precision Timing™ core-ensuring stable black-level tracking across temperature and gain changes without external components.

Can the AD9995KCP operate in both master and slave timing modes?

Yes, the AD9995KCP supports both master and slave timing modes. In master mode, it generates HD and VD from CLI and internal counters; in slave mode, it synchronizes all internal timing-including H1–H4, RG, and V-sequences-to externally supplied HD and VD signals. Mode selection is controlled via the MODE register, and the SYNC input resets internal counters in either configuration. This dual-mode capability allows seamless integration into systems with centralized or distributed timing architectures.

What package type and thermal characteristics apply to the AD9995KCP?

The AD9995KCP is packaged in a 56-lead LFCSP (CP-56) with an exposed thermal pad, measuring 8 mm × 8 mm × 0.85 mm. Its thermal resistance is θ_JA = 25°C/W when mounted on a 4-layer PCB with the paddle soldered to the board. This package supports reliable operation across the full –20°C to +85°C industrial temperature range and dissipates 360 mW typical at 36 MHz, with standby modes reducing power to as low as 0.5 mW.