Analog Devices Inc. AD9991KCPZ

Overview

AD9991KCPZ from Analog Devices is a 10-bit CCD signal processor with integrated Precision Timing™ generator, designed for digital still cameras and camcorders. It combines correlated double sampling (CDS), 6–42 dB variable gain amplification, black level clamping, and a 27 MHz 10-bit A/D converter in a single 56-lead LFCSP package. Its on-chip timing core delivers 800 ps resolution for vertical/horizontal clock generation and supports 6-phase V-clocking for high-fidelity CCD readout.

For engineers reviewing the AD9991KCPZ datasheet, AD9991KCPZ pinout, AD9991KCPZ application, or AD9991KCPZ equivalent, this page provides verified functional roles, exact timing resolution (800 ps at 27 MHz), confirmed 56-pin LFCSP package mapping, real-world shutter/blanking control behavior, and validated alternatives for CCD imaging signal chain design.

Technical Context

The AD9991KCPZ implements a fully programmable Precision Timing core synchronized to a 27 MHz CLI input, dividing each pixel period into 48 discrete edge positions (800 ps resolution). It generates all essential CCD clocks - RG, H1–H4, V1–V6, VSG1–VSG5, SUBCK, and substrate bias - with independent rising/falling edge control per signal.

Its analog front end features a correlated double sampler with ≤500 mV allowable reset transient, a 1024-step VGA (6–42 dB), 256-step optical black clamp, and a 10-bit ADC with ±0.5 LSB DNL and guaranteed no missing codes. All timing and analog functions are configured via a 3-wire serial interface operating up to 10 MHz.

Key Specifications

Pinout & Package

AD9991KCPZ is housed in a 56-lead Lead Frame Chip Scale Package (LFCSP) with exposed paddle, specified for –20°C to +85°C operation. Thermal resistance θ_JA = 25°C/W measured on a 4-layer PCB with paddle soldered to ground plane.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD9991KCPZ, TDC1308IPWPR trades integration and resolution for cost, while AD9991KCPZ's 10-bit depth, 6-phase timing, and electronic shutter make it uniquely suited for consumer camcorders and industrial inspection requiring both speed and precision.

Availability

AD9991KCPZ is available at Aetrix Electronics and suitable for digital still cameras, digital video camcorders, and industrial imaging systems requiring stable component supply, long-term lifecycle support, and traceable sourcing for production programs.

Supply support for AD9991KCPZ 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 semiconductor company specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and signal conditioning.

The AD9991KCPZ belongs to Analog Devices' CCD signal processor product line, engineered specifically for high-fidelity, low-noise imaging in portable and embedded camera systems requiring tight integration of analog front-end and programmable timing functions.

FAQ

What is the maximum pixel clock rate supported by the AD9991KCPZ?

The AD9991KCPZ supports a maximum CLI (clock input) frequency of 27 MHz, as specified in the Absolute Maximum Ratings and Timing Specifications tables. This enables real-time digitization of high-resolution CCD sensors with up to 4095 pixels per line. The device's internal pipeline latency remains fixed at 11 cycles regardless of clock rate, ensuring predictable timing behavior across its operational range. AD9991KCPZ maintains full specification compliance - including DNL, noise, and timing resolution - only within this 27 MHz limit.

Does the AD9991KCPZ include on-chip drivers for all CCD clock signals?

No - the AD9991KCPZ integrates on-chip drivers only for RG and H1–H4 outputs, each programmable from 0 to 30.1 mA. Vertical clocks (V1–V6), sensor gate pulses (VSG1–VSG5), and substrate clock (SUBCK) are generated digitally but require an external V-driver IC for level translation and current boosting. This architecture balances integration and flexibility: horizontal timing is handled internally for minimal skew, while vertical timing retains external driver selection for voltage/current optimization per sensor type. AD9991KCPZ's pinout reflects this division, with dedicated HVDD/RGVDD supplies for H/RG drivers and DVDD for logic-driven V-outputs.

How does the Precision Timing™ core achieve 800 ps resolution at 27 MHz?

The AD9991KCPZ's Precision Timing™ core divides each 27 MHz CLI cycle (37 ns period) into 48 discrete edge positions, yielding 37 ns ÷ 48 ≈ 771 ps per step - rounded to 800 ps in specifications. This is implemented via a high-speed interpolator synchronized to CLI, not a PLL-based multiplier. Edge locations for RG, H1–H4, SHP, and SHD are programmed using six-bit registers mapped to quadrants I–IV (0–47), with fixed 6 ns delay (tCLIDLY) from CLI edge to first internal position. AD9991KCPZ uses this resolution to align sampling edges within ±1 LSB of ideal CDS timing - directly improving noise rejection in the analog front end.

Can the AD9991KCPZ operate in both master and slave timing modes?

Yes - the AD9991KCPZ supports dual timing architectures. In master mode, it derives all internal clocks from CLI and generates HD/VD sync outputs. In slave mode, it accepts external HD and VD signals on pins 47 and 50, synchronizing all internal counters and timing generation to those inputs. Mode selection is controlled via register configuration, not hardware pins. This allows seamless integration into systems with centralized timing (e.g., ASIC-based video processors) or distributed timing (e.g., standalone camera modules). AD9991KCPZ maintains identical analog performance and register accessibility in both modes.

What are the power supply requirements for the AD9991KCPZ analog and digital sections?

The AD9991KCPZ requires seven independent supply domains: AVDD/AVSS (AFE analog), TCVDD/TCVSS (timing core analog), RGVDD/RGVSS (RG driver), HVDD/HVSS (H-driver), DRVDD/DRVSS (data output driver), DVDD/DVSS (digital logic), and REFT/REFB (reference). Each operates from 2.7 V to 3.6 V. Critical decoupling is required per the Layout Guidelines: 0.1 µF ceramic capacitors close to each supply pin, plus bulk capacitance on AVDD and DVDD. AD9991KCPZ specifies 270 mW typical power at 27 MHz, with standby modes reducing consumption to 0.5 mW - enabling battery-powered operation when idle.