Analog Devices Inc. AD9991KCPZRL

Overview

AD9991KCPZRL 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 VGA, black level clamp, and 10-bit 27 MHz ADC in a single 56-lead LFCSP package. Its on-chip timing core delivers 800 ps resolution at 27 MHz for precise vertical/horizontal clock generation.

For engineers reviewing the AD9991KCPZRL datasheet, AD9991KCPZRL pinout, AD9991KCPZRL application, or AD9991KCPZRL equivalent, key selection considerations include its 6-phase vertical clock support, programmable H/V timing registers, 56-lead LFCSP thermal performance (θ_JA = 25°C/W), and full 3-wire serial interface control of CCD sensor timing and analog front-end parameters.

Technical Context

The AD9991KCPZRL implements a dual-domain architecture: an analog front end (AFE) with CDS, VGA, clamp, and 10-bit ADC operating up to 27 MHz pixel rate; and a fully programmable Precision Timing core generating RG, H1–H4, V1–V6, VSG1–VSG5, SUBCK, and MSHUT/STROBE signals. All high-speed clocks are resolved to 48 edge positions per pixel period, enabling sub-nanosecond alignment.

Timing is configured via 3-wire serial interface (SL/SCK/SDI) with register banks supporting independent V-sequence programming (up to 10 sequences), H-blanking pattern control, shutter mode selection (electronic/mechanical), and drive strength adjustment (0–30 mA per H/RG output). The device operates across –20°C to +85°C with five independent supply domains (AVDD, TCVDD, RGVDD, HVDD, DRVDD, DVDD).

Key Specifications

Pinout & Package

AD9991KCPZRL is housed in a 56-lead Lead Frame Chip Scale Package (LFCSP, CP-56) with exposed thermal pad. Pin layout supports dedicated analog/digital/power domains: AVDD/AVSS for AFE, TCVDD/TCVSS for timing core, HVDD/HVSS for H-drivers, RGVDD/RGVSS for RG driver, DRVDD/DRVSS for data outputs, and DVDD/DVSS for digital logic and serial interface.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD9991KCPZRL, TDC1304IPWPR offers higher resolution but no timing engine, increasing system design effort; LM98714BCMTX/NOPB provides greater bit depth but omits critical features for video CCDs-making AD9991KCPZRL the only option supporting full 6-phase vertical timing, SUBCK, and MSHUT/STROBE in a single chip.

Availability

AD9991KCPZRL 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 AD9991KCPZRL 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 AD9991KCPZRL belongs to Analog Devices' Precision Timing™ CCD signal processor family, engineered specifically for high-fidelity, low-noise imaging in digital photography and video capture systems requiring tight synchronization between analog signal chain and sensor timing.

FAQ

What is the maximum pixel clock frequency supported by the AD9991KCPZRL?

The AD9991KCPZRL supports a maximum CLI (clock input) frequency of 27 MHz, which defines the upper limit for pixel rate operation. At this rate, the Precision Timing core maintains 800 ps resolution per edge position, and the 10-bit ADC achieves full specification performance including DNL ≤ ±0.5 LSB and total output noise of 0.25 LSB rms. Operation above 27 MHz is not characterized or guaranteed.

Does the AD9991KCPZRL include on-chip drivers for all CCD clock signals?

The AD9991KCPZRL integrates on-chip drivers for RG and H1–H4 outputs, each programmable from 0 to 30 mA in 4.1 mA steps. However, it does not include drivers for vertical clocks (V1–V6), sensor gate pulses (VSG1–VSG5), or SUBCK-these require external V-driver circuitry. The AD9991KCPZRL provides the timing logic and digital outputs only for those signals.

How many independent vertical timing sequences can be programmed in the AD9991KCPZRL?

The AD9991KCPZRL supports up to 10 independent vertical timing sequences (V-sequences), each configurable with unique V1–V6, VSG1–VSG5, and SUBCK patterns. These sequences can be assigned to different regions of a field using sequence change positions, enabling per-region control of CLPOB, PBLK, and HBLK-critical for advanced optical black calibration in video applications.

What is the function of the CLO pin on the AD9991KCPZRL?

The CLO (Clock Output) pin on the AD9991KCPZRL outputs the inverse of the CLI input signal and is intended to drive an external crystal connected between CLI and CLO. This configuration forms a self-contained crystal oscillator, eliminating the need for an external clock source or oscillator IC. The AD9991KCPZRL uses this internally generated clock for all timing operations.

What power supply domains does the AD9991KCPZRL require, and why are they separated?

The AD9991KCPZRL requires six 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), and DVDD/DVSS (digital logic). This separation minimizes noise coupling between sensitive analog signal paths (CDS, ADC) and high-current digital switching (H/RG outputs), preserving SNR and timing integrity.