Analog Devices Inc. AD9948KCPZRL

Overview

AD9948KCPZRL from Analog Devices is a 10-bit CCD signal processor with integrated Precision Timing™ core, Correlated Double Sampler (CDS), 0–18 dB pixel gain amplifier (PxGA®), 6–42 dB variable gain amplifier (VGA), and 25 MSPS ADC - designed for digital still camera front-end signal conditioning and timing generation. It delivers black-level clamping, on-chip 3 V horizontal/RGB drivers, and programmable high-speed CCD clocks with 800 ps resolution.

For engineers reviewing the AD9948KCPZRL datasheet, AD9948KCPZRL pinout, AD9948KCPZRL application, or AD9948KCPZRL equivalent, this page provides verified functional identity, confirmed 40-lead LFCSP package mapping, validated 25 MHz pixel-rate operation, real-world timing register programmability, and two field-validated alternative parts for CCD imaging signal chain design.

Technical Context

The AD9948KCPZRL integrates analog front-end (AFE) and timing driver functions in one die: its CDS stage suppresses reset noise before PxGA/VGA amplification; the 10-bit ADC digitizes up to 25 MSPS signals with ±0.5 LSB DNL and guaranteed no missing codes; the Precision Timing core divides the CLI master clock into 48 edge positions per pixel period (tCLI/48), enabling 800 ps resolution for RG, H1–H4, SHP, and SHD edges.

Timing control is implemented via 3-wire serial interface (up to 10 MHz SCK) with auto-increment register writes; all high-speed outputs (RG, H1–H4) support programmable polarity, edge location (0–47), and drive current (0–30.1 mA in 4.1 mA steps); data outputs D0–D9 are phase-adjustable (DOUTPHASE register) with 11-cycle pipeline latency synchronized to CLI.

Key Specifications

Pinout & Package

AD9948KCPZRL is housed in a 40-lead Lead Frame Chip Scale Package (LFCSP, CP-40) with exposed paddle for thermal dissipation (θ_JA = 27°C/W). Pin 1 identifier located top-left; NC pins at positions 1 and 40.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD9948KCPZRL, AD9949KCPZRL offers higher resolution and speed at increased power and register complexity, while TDC1000YFFT serves entirely different sensing domains and lacks essential CCD signal processing features - making AD9948KCPZRL uniquely suited for precision digital still camera AFE integration.

Availability

AD9948KCPZRL is available at Aetrix Electronics and suitable for digital still camera modules, industrial machine vision systems, medical endoscopic imaging, and scientific CCD instrumentation requiring stable component supply, long-lifecycle support, and lead-free compliance.

Supply support for AD9948KCPZRL 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 leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and signal conditioning.

The AD9948KCPZRL belongs to Analog Devices' Precision Timing™ CCD signal processor product line, engineered specifically to integrate analog front-end functions and sub-nanosecond timing generation for digital imaging applications - reducing system complexity and improving image fidelity in compact camera designs.

FAQ

What is the maximum pixel clock frequency supported by the AD9948KCPZRL?

The AD9948KCPZRL supports a maximum pixel clock frequency of 25 MHz, as specified in the General Specifications table. This enables operation with CCD sensors up to 4096 × 4096 pixels at frame rates compatible with digital still camera requirements. The CLI input must be driven at this rate to maintain timing core accuracy and ADC sampling integrity. Exceeding 25 MHz violates absolute maximum ratings and may cause loss of synchronization or data corruption in AD9948KCPZRL operation.

Does the AD9948KCPZRL include on-chip drivers for CCD horizontal clocks?

Yes, the AD9948KCPZRL integrates on-chip drivers for H1–H4 and RG outputs, each capable of delivering up to 30.1 mA with programmable current control (0–7 steps × 4.1 mA). These drivers operate from HVDD and RGVDD supplies (2.7–3.6 V) and support direct connection to CCD inputs without external buffers. The AD9948KCPZRL datasheet confirms H2/H4 are hardware-inverted copies of H1/H3 with <1 ns propagation skew, ensuring precise crossover voltage alignment critical for CCD charge transfer efficiency.

How is timing precision achieved in the AD9948KCPZRL's Precision Timing™ core?

The AD9948KCPZRL achieves 800 ps timing resolution by dividing the CLI master clock period into 48 discrete edge positions (tCLI/48), with a fixed 6 ns delay (tCLIDLY) from CLI to first internal pixel period position. Each high-speed output (RG, H1–H4, SHP, SHD) is assigned programmable rising/falling edge locations within this 48-step grid, mapped via 6-bit register fields. This architecture eliminates external PLLs or delay lines and enables deterministic sub-nanosecond clock alignment - a capability explicitly documented for AD9948KCPZRL in the Timing Specifications and Precision Timing sections of the datasheet.

What are the key power supply requirements for the AD9948KCPZRL?

The AD9948KCPZRL requires five independent supply rails: AVDD/TCVDD (2.7–3.6 V) for AFE and timing core; HVDD (2.7–3.6 V) for H1–H4 drivers; RGVDD (2.7–3.6 V) for RG driver; DRVDD (2.7–3.6 V) for D0–D9 drivers; and DVDD (2.7–3.6 V) for digital logic. All supplies must be decoupled per the layout guidelines, and REFT/REFB require 1.0 µF capacitors to AVSS. Total active power is 220 mW at 25 MHz; shutdown mode draws 1 mW - values confirmed in the General Specifications table for AD9948KCPZRL.

Can the AD9948KCPZRL perform correlated double sampling (CDS) and black-level clamping simultaneously?

Yes, the AD9948KCPZRL performs CDS and black-level clamping in sequence within the same signal path: CDS removes reset kTC noise from the CCD output, then the resulting signal passes through the PxGA and VGA stages before black-level clamping adjusts the DC offset at the ADC input. The clamp level is programmable in 256 steps (0–63.75 LSB at ADC output) and supports both normal and fast settling modes. This dual-stage processing is intrinsic to AD9948KCPZRL's analog front-end architecture and is validated in the ANALOG SPECIFICATIONS and GENERAL DESCRIPTION sections of the datasheet.