Analog Devices Inc. AD9990BBCZ

Overview

AD9990BBCZ from Analog Devices is a dual-channel, 14-bit CCD signal processor with integrated precision timing core, supporting up to 32 MHz per channel, 24 programmable vertical clocks, and correlated double sampling (CDS) with selectable gains (−3 dB to +6 dB). It delivers 6 dB to 42 dB VGA control, black level clamping, and on-chip 3 V horizontal/RG drivers for digital still camera sensor interfaces.

For engineers reviewing the AD9990BBCZ datasheet, AD9990BBCZ pinout, AD9990BBCZ application, or AD9990BBCZ equivalent, key selection considerations include its 14-bit/32 MHz ADC performance, ~488 ps timing resolution, dual-channel CDS/VGA/ADC signal chain, and 112-ball CSP_BGA package compatibility with high-density imaging PCB layouts.

Technical Context

The AD9990BBCZ integrates two independent analog front ends-each with CDS, 10-bit VGA, black level clamp, and 14-bit ADC-synchronized by a single Precision Timing® core capable of sub-nanosecond clock edge adjustment (~488 ps at 32 MHz). Its timing generator produces 24 vertical clocks, 8 horizontal clocks (H1A–H4A, H1B–H4B), RG_A/B, substrate clock (SUBCK), and gate pulses.

All timing signals are derived from an on-chip sync generator with external sync input support, while internal LDOs provide regulated 1.8 V (core) and 3 V (drivers) supplies. Eight general-purpose outputs (GPO1–GPO8) enable shutter control and system-level coordination without external logic.

Key Specifications

Pinout & Package

AD9990BBCZ is housed in an 112-ball CSP_BGA package (8 mm × 8 mm, 0.65 mm pitch) with thermal pad exposed on underside. Pin functions are defined per Analog Devices AD9990 Rev. SpB datasheet Figure 1 and Pin Configuration table (Pages 17–19).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD9990BBCZ, AD9991BBCZ offers identical timing precision and ADC performance in a single-channel form factor, while TDC1000YFFT serves a fundamentally different transducer domain and lacks CCD-specific circuitry-making AD9991BBCZ the only viable alternative for channel-reduced CCD systems.

Availability

AD9990BBCZ is available at Aetrix Electronics and suitable for digital still camera modules, industrial inspection systems, and scientific CCD acquisition equipment requiring stable component supply, long-lifecycle support, and guaranteed traceability.

Supply support for AD9990BBCZ 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 AD9990BBCZ belongs to Analog Devices' CCD Signal Processor product line, engineered specifically for high-fidelity, low-noise digitization and precise clock generation in professional and industrial CCD-based imaging systems.

FAQ

What is the maximum supported CCD clock frequency for AD9990BBCZ?

The AD9990BBCZ supports up to 32 MHz per channel for analog-to-digital conversion and timing generation. Its Precision Timing® core maintains ~488 ps resolution at this rate, enabling accurate edge placement for high-speed CCD pixel clocks. The 32 MHz limit applies to both the ADC sampling clock and the highest-frequency timing outputs such as RG and H-clocks. Exceeding this frequency may compromise CDS accuracy and timing jitter performance in the AD9990BBCZ.

Does AD9990BBCZ include on-chip voltage regulation?

Yes, AD9990BBCZ integrates two dedicated LDO regulators: one providing a stable 1.8 V supply for the digital core and analog circuitry, and another delivering 3 V for horizontal and RG drivers. These on-chip LDOs reduce external power components, improve PSRR for noise-sensitive analog sections, and simplify layout-eliminating the need for discrete 1.8 V and 3 V regulators in most implementations of AD9990BBCZ.

How many vertical clock outputs does AD9990BBCZ provide, and are they independently programmable?

AD9990BBCZ provides 24 vertical clock outputs labeled XV1 through XV24. Each is fully programmable in terms of pulse width, delay, polarity, and sequence via internal registers accessed over the 3-wire serial interface. This allows customized drive waveforms for advanced interline or frame-transfer CCDs-supporting complex multi-phase vertical transfer schemes not possible with fixed-function timing generators in the AD9990BBCZ.

What is the function of the GPO pins on AD9990BBCZ?

The AD9990BBCZ includes eight general-purpose outputs (GPO1–GPO8), each configurable as push-pull or open-drain with programmable polarity and timing relative to internal events. They are commonly used for mechanical shutter control, LED flash synchronization, sensor reset coordination, or system-level handshaking-offering flexible, software-defined I/O without requiring external GPIO expanders in designs based on AD9990BBCZ.

Is AD9990BBCZ pin-compatible with any other Analog Devices CCD processors?

No, AD9990BBCZ is not pin-compatible with other Analog Devices CCD processors. While AD9991BBCZ shares the same 112-ball CSP_BGA package footprint, its pin assignments differ significantly-particularly for analog inputs, clock outputs, and power domains. Board-level reuse between AD9990BBCZ and AD9991BBCZ requires redesign. Always verify pin mapping against the respective Rev. SpB datasheets before migration or substitution involving AD9990BBCZ.