AD9940 Datasheet | Analog Devices

FEATURES 56 MSPS correlated double sampler (CDS) with 6 d B gain On-chip horizontal and RG timing driver Single-supply operation (2.7 V min) Precision Timing™ core with 0.37 ns resolution at 56 MSPS Low power CMOS: 105 m W at 2.7 V (115 m W at 3.0 V) 48-lead LQFP and 48-lead LFCSP packages APPLICATIONS Professional HDTV camcorders Professional/high end digital cameras Broadcast cameras Industrial high speed cameras High speed data-acquisition systems GENERAL DESCRIPTION The AD9940 is a high speed, correlated double sampler for high speed digital imaging applications. Integrated with a programmable timing driver using the Precision Timing core, the AD9940 features a 56 MHz CDS amplifier with 6 d B of fixed gain, an internal voltage reference supply, and timing control for all the high speed clocks necessary for CCD imaging systems. The Precision Timing core allows adjustment of high speed clocks with a resolution of 0.37 ns. Output buffers are also included, providing drive strength for PCB traces and direct connection to an image signal processor such as the AD9941. The AD9940 is ideal for applications that need to place the CDS and VGA/ADC circuits on separate PC boards. The fully differential outputs of the AD9940 provide good signal integrity when interfaced with the differential input AD9941. The AD9940 operates from a single 2.7 V power supply, typically dissipates 105 m W (excluding the H/RG drive current), and is packaged in 48-lead LQFP and 48-lead LFCSP packages. CCDIN FUNCTIONAL BLOCK DIAGRAM REFT REFB VREF DIFFN DIFFP RG HL H1 TO H4 HORIZONTAL 4 DRIVERS . INTERNAL CLOCKS PRECISION TIMING GENERATOR SYNC GENERATOR INTERNAL REGISTERS HD SHP SHD Figure 1. SL SCK SDI 05261-001 Rev. A Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityisassumedby Analog Devices for itsuse,nor foranyinfringementsofpatentsor other rights of third parties that may...