Analog Devices Inc. AD9927BBCZ

Overview

AD9927BBCZ from Analog Devices is a 14-bit CCD signal processor integrating a 18-channel vertical driver, precision timing generator, correlated double sampler (CDS), 10-bit VGA (6–42 dB), and 14-bit 40 MHz ADC - designed for digital still camera image acquisition chains requiring high-fidelity analog front-end processing and sub-400 ps clock resolution.

For engineers reviewing the AD9927BBCZ datasheet, AD9927BBCZ pinout, AD9927BBCZ application, or AD9927BBCZ equivalent, this device serves as a complete CCD interface solution with on-chip V-driver, horizontal/vertical timing generation, black level clamping, and programmable GPOs for shutter control - critical for compact DSC sensor subsystem design and timing-critical pixel readout.

Technical Context

The AD9927BBCZ implements a unified Precision Timing core synchronized to a 40 MHz CLI input, enabling independent edge placement across 64 positions (~390 ps resolution at 40 MHz) for RG, H1–H8, SHP, and SHD signals. Its architecture supports both master mode (internal VD/HD generation) and slave mode (external VD/HD synchronization).

It integrates dual-domain power management: 1.8 V logic domains (AVDD, DVDD, TCVDD) coexist with 3.0 V/3.3 V drivers (RGVDD, HVDD, XVVDD) and bipolar V-driver supplies (VH1/VH2 = +15 V, VL1/VL2 = −7.5 V, VM1/VM2 = 0 V), enabling direct drive of advanced 5-field CCDs with 3-level and 2-level vertical clocks.

Key Specifications

Pinout & Package

AD9927BBCZ uses a 128-lead CSP_BGA package (9 mm × 9 mm, 0.65 mm pitch) with dedicated power domains for analog, timing, digital, driver, and V-driver sections - enabling low-noise AFE operation while supporting high-voltage vertical clock synthesis.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TDC1308IPWPR and LM98725MTX/NOPB, AD9927BBCZ provides full signal chain integration - combining 14-bit digitization, 18-channel V-driving, and 400 ps timing resolution in one CSP_BGA - reducing system-level jitter, board area, and firmware timing calibration effort.

Availability

AD9927BBCZ is available at Aetrix Electronics and suitable for digital still camera modules, prosumer DSLR imaging subsystems, and industrial machine vision sensor interfaces requiring stable component supply, long-lifecycle support, and traceable sourcing.

Supply support for AD9927BBCZ 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, industrial, communications, and imaging markets since 1965.

The AD9927BBCZ belongs to Analog Devices' CCD Signal Processor product line - engineered specifically for high-fidelity, low-jitter digital still camera image acquisition with integrated timing, analog front-end, and driver functionality.

FAQ

What is the maximum supported CLI clock frequency for AD9927BBCZ?

The AD9927BBCZ supports a maximum CLI clock frequency of 40 MHz, as specified in the Absolute Maximum Ratings and Timing Specifications tables. At this rate, the Precision Timing core achieves ~390 ps resolution per edge position. Operation above 40 MHz is not guaranteed and may result in timing violations or degraded ADC performance. The AD9927BBCZ datasheet explicitly defines 40 MHz as the upper limit for reliable CDS sampling, VGA settling, and digital output timing compliance.

Does AD9927BBCZ include an integrated crystal oscillator circuit?

Yes, AD9927BBCZ includes an on-chip crystal driver circuit. The CLO pin outputs the inverse of the CLI input, enabling direct connection of a parallel-resonant crystal between CLI and CLO to form a self-contained oscillator. This eliminates the need for an external crystal oscillator IC and reduces component count in master-mode configurations where the AD9927BBCZ generates its own timing reference.

How many vertical clock outputs does AD9927BBCZ provide, and what voltage levels do they support?

The AD9927BBCZ provides 18 vertical clock outputs: V1A–V6 (3-level), V7–V15 (2-level), and SUBCK. These support programmable voltage rails: VH1/VH2 up to +16.5 V, VL1/VL2 down to −8.5 V, and VM1/VM2 centered at 0 V - enabling direct drive of multi-phase CCD vertical registers without external level shifters or discrete drivers.

Can AD9927BBCZ operate in slave mode, and what signals are required?

Yes, AD9927BBCZ supports slave mode operation. In this mode, it synchronizes to externally provided VD (vertical sync) and HD (horizontal sync) signals applied to the VD and HD pins. All internal timing generators lock to these inputs, and the AD9927BBCZ disables its internal VD/HD outputs. This configuration is used when a host processor or ASIC handles primary timing generation while delegating AFE and driver functions to the AD9927BBCZ.

What is the black level clamp resolution and implementation location in AD9927BBCZ?

The AD9927BBCZ black level clamp offers 1024-step resolution (10-bit control) and operates at the ADC output stage - meaning clamping is applied after digitization, allowing precise digital offset correction without analog path degradation. Clamp level is programmable from 0 LSB to 255 LSB (full-scale range), and the circuit supports variable hold timing to accommodate optical black (OB) pixel sampling windows.