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WM8170 Datasheet(PDF) 1 Page - Wolfson Microelectronics plc |
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WM8170 Datasheet(HTML) 1 Page - Wolfson Microelectronics plc |
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1 / 41 page  WM8170 3.3V Integrated Signal Processor for Area Array CCDs Product Preview Rev 1.0 March 2000 WOLFSON MICROELECTRONICS LTD. Lutton Court, Bernard Terrace, Edinburgh, EH8 9NX, UK Tel: +44 (0) 131 667 9386 Fax: +44 (0) 131 667 5176 Email: sales@wolfson.co.uk http://www.wolfson.co.uk Product Preview data sheets contain specifications for products in the formative phase of development. These products may be changed or discontinued without notice. © 2000 Wolfson Microelectronics Ltd . DESCRIPTION The WM8170 is a 10-bit analogue front end/digitiser IC, which processes and digitises the analogue output signals from area array CCD sensors at pixel sample rates of up to 21MSPS. The device contains input blanking, correlated double sampling (CDS), programmable gain amplifier, black level clamp, on-board voltage reference and a 10-bit, 21MSPS ADC. Two auxiliary 8 bit DACs are provided which may be used for bias voltage control or camera functions such as auto-focus. Fine black level adjustment is performed digitally after the ADC. This digital adjustment will follow DC shifts in the video input without introducing digital correction noise into the image. The WM8170 is designed to interface to a wide range of area array CCDs and can operate at lower power for slower sample rates by setting the reference bias current via an external resistor connected to the ISET pin. All signal timing within the device is derived from the CCD clock signals. The WM8170 is controlled via a configurable serial interface, which is compatible with all of Wolfson’s imaging devices. The user is able to control the device functions and monitor on-chip register settings via the easy-to-use digital management interface. FEATURES • 10-bit, 21MSPS ADC • No missing codes guaranteed • Correlated double sampling • Programmable gain amplifier • Black level clamp • Input blanking • Two auxiliary 8-bit DACs • Power save mode • Serial or parallel control bus • Adjustable sample rate • User selectable sampling on rising or falling edge of clocks • Single 3.3V power supply (3V minimum) • 48-pin TQFP package • Standby mode ICC<10µA • Power consumption typically 190mW at 12MHz, 270mW at 21MHz APPLICATIONS • Digital still cameras • Digital camcorders • PC cameras • Progressive scan CCDs • NTSC, PAL interline CCDs BLOCK DIAGRAM TIMING GENERATOR REFERENCE VRT (14) VRB (15) VMID (16) BLCENB (27) VCLP (12) CLPENB (24) CLPSWB (25) CLAMP DIN (18) PIN (19) CDS S/H PBLK/HD (26) Dual Mode Pin DIGITAL BLACK LEVEL CLAMP AND FILTER 10-BIT ADC PGA ANALOGUE BLACK LEVEL CLAMP CONFIGURABLE SERIAL/PARALLEL INTERFACE (8) PTDO (31) OEB DATA I/O (1,4-7,44-48) SHP (22) SHD (21) CVDD (42) AVDD[1-3] (10,11,20) DVDD[1-4] (3,23,33,39) DCLK (38) HI-Z DIGITAL COMPARATOR 8-BIT ADC 8-BIT ADC VOUT1 (40) VOUT2 (41) BIAS CIRCUIT (29) PNS (36) SEN/STB (37) SCK/RNW (35) SDI/DNA (32) NRESET (34) SDO (30) PDB/VD Dual Mode Pin (13) ISET (2,28) DGND[1-2] (9,17) AGND[1-2] (43) CGND WM8170 |
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