ADA4800 Datasheet | Analog Devices

FEATURES Integrated active load and gain of 1 buffer Very low buffer power consumption As low as 20 m W on chip Power save feature to reduce active load current by GPO control High buffer speed 400 MHz, - 3 d B bandwidth 415 V/μs slew rate Fast settling time to 1%, 2 V step: 5 ns 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 IN 1 IISF IAL VEE 2 IBUFF ICC +1 5 6 IIDRV OUT 3 IDRV Figure 1. APPLICATIONS CCD image sensor output buffer Digital still cameras Camcorders GENERAL DESCRIPTION The ADA4800 is voltage buffer 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 chargecoupled 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 m W 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 m A quiescent current setting, it provides 400 MHz, - 3 d B 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. 7.5V The versatility of the ADA4800 allows for seamless...