High Speed, Correlated Double Sampler with Integrated Timing Driver Data Sheet AD9940 FEATURES GENERAL DESCRIPTION 56 MSPS correlated double sampler (CDS) with 6 dB gain The AD9940 is a high speed, correlated double sampler for On-chip horizontal and RG timing driver high speed digital imaging applications. Integrated with a Single-supply operation (2.7 V min) programmable timing driver using the Precision Timing Precision Timing core with 0.37 ns resolution at 56 MSPS core, the AD9940 features a 56 MHz CDS amplifier with Low power CMOS: 105 mW at 2.7 V (115 mW at 3.0 V) 6 dB of fixed gain, an internal voltage reference supply, 48-lead LQFP and 48-lead LFCSP packages and timing control for all the high speed clocks necessary for CCD imaging systems. The Precision Timing core allows APPLICATIONS adjustment of high speed clocks with a resolution of 0.37 ns. Professional HDTV camcorders Output buffers are also included, providing drive strength for PCB traces and direct connection to an image signal processor Professional/high end digital cameras such as the AD9941. Broadcast cameras Industrial high speed cameras The AD9940 is ideal for applications that need to place the High speed data-acquisition systems CDS and VGA/ADC circuits on separate PC boards. The fully differential outputs of the AD9940 provide good signal integ- rity when interfaced with the differential input AD9941. The AD9940 operates from a single 2.7 V power supply, typically dissipates 105 mW (excluding the H/RG drive current), and is packaged in 48-lead LQFP and 48-lead LFCSP packages. FUNCTIONAL BLOCK DIAGRAM REFT REFB AD9940 V REF DIFFN CCDIN CDS BUF DIFFP INTERNAL CLOCKS RG HL PRECISION HORIZONTAL TIMING RST DRIVERS 4 GENERATOR H1 TO H4 SYNC INTERNAL GENERATOR REGISTERS CLI HD SHP SHD SL SCK SDI . Figure 1. Rev. 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Technical Support www.analog.com 05261-001AD9940 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Data Bit Descriptions ........................................................................9 Applications ....................................................................................... 1 Serial Interface Timing .................................................................. 12 General Description ......................................................................... 1 System Overview ............................................................................ 13 Functional Block Diagram .............................................................. 1 Analog Front End Operation .................................................... 13 Revision History ............................................................................... 2 Precision Timing, High Speed Timing Generation ................... 14 Specif icat ions ..................................................................................... 3 Timing Resolution ...................................................................... 14 Analog Specifications ................................................................... 4 High Speed Clock Programmability ........................................ 14 Digital Specifications ................................................................... 5 H-Driver and RG Outputs ........................................................ 16 Timing Specifications (Slave Timing Mode) ............................ 5 HBLK Sequences ........................................................................ 17 Absolute Maximum Ratings ............................................................ 6 Applications Information .............................................................. 19 Thermal Characteristics .............................................................. 6 Outline Dimensions ....................................................................... 20 ESD Caution .................................................................................. 6 Ordering Guide .......................................................................... 20 Pin Configuration and Function Descriptions ............................. 7 REVISION HISTORY 9/2016Rev. 0 to Rev. A Changes to Figure 4 .......................................................................... 7 Changes to Table 6 ............................................................................ 8 Change to Figure 15 Caption ........................................................ 19 Updated Outline Dimensions ....................................................... 20 Changes to Ordering Guide .......................................................... 20 7/2005Revision 0: Initial Version Rev. A Page 2 of 20