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ADA4800:  Low Power, High Speed CCD Buffer Amplifier

Product Details

Product Status:Recommended for New Designs

The ADA4800 is a voltage buffer amplifier integrated with an active load. The buffer is a low power, high speed, low noise, high slew rate, fast settling, fixed gain of 1 monolithic amplifier for charge-coupled device (CCD) applications. For CCD applications, the active load current source (IAL) can load the open source CCD sensor outputs and the buffer can drive the AFE load. The active current load can also be switched off, to use the ADA4800 as just a unity gain buffer. The buffer consumes only 20 mW of static power. In applications where power savings is critical, the ADA4800 features a power save mode (see the Power Save Mode section), which further reduces the total current consumption. The bandwidth of the ADA4800 buffer is also fully adjustable through the IDRV pin.

The buffer of the ADA4800 employs a push-pull output stage architecture, providing drive current and maximum slew capability for both rising and falling signal transitions. At a 5 mA quiescent current setting, it provides 400 MHz, −3 dB bandwidth, which makes this buffer well suited for CCD sensors from machine vision to digital still camera applications.

The ADA4800 is ideal for driving the input of the Analog Devices, Inc., 12-bit and 14-bit high resolution analog front ends (AFE) such as the AD9928, AD9990, AD9920A, AD9923A, and AD997x family.

The versatility of the ADA4800 allows for seamless interfacing with many CCD sensors from various manufacturers.

The ADA4800 is designed to operate at supply voltages as low as 4 V and up to 17 V. It is available in a 1.6 mm × 1.6 mm × 0.55 mm, 6-lead LFCSP package and is rated to operate over the industrial temperature range of −40°C to +85°C.

Applications

  • CCD image sensor output buffer
  • Digital still cameras
  • Camcorders

FEATURES and BENEFITS

  • Integrated active load and gain of 1 buffer
  • Very low buffer power consumption
    As low as 20 mW on chip
  • Power save feature to reduce active load current by GPO control
  • Fast settling time to 1%, 2 V step: 5 ns
  • High buffer speed
    400 MHz, −3 dB bandwidth
    415 V/μs slew rate
  • Adjustable buffer bandwidth
  • Push-pull output stage
  • Adjustable active load current
  • Small package: 1.6 mm × 1.6 mm × 0.55 mm

Functional Block Diagram for ADA4800

Documentation

Title Content Type File Type
ADA4800: Low-Power High Speed CCD Buffer Amplifier Preliminary Data Sheet (Rev A, 07/2010) (pdf, 695 kB) Data Sheets PDF
A Stress-Free Method for Choosing High-Speed Op Amps
A decision-tree approach to making the critical decision about high-speed op amp selection, including a look at some helpful tools.
Webcasts WEBCAST
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

Evaluation Kits & Symbols & Footprints

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Price, packaging, availability

ADA4800 Model Options
Price Table Help

The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.


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