Vertical line driver and DC-DC converter - Philips
Description
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INTEGRATED CIRCUITS
DATA SHEET
TDA9991HL Vertical line driver and DC-DC converter for Full Frame and Frame Transfer CCD image sensors
Preliminary specification Supersedes data of 2000 Dec 22 File under Integrated Circuits, IC02 2001 May 29
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Philips Semiconductors
Preliminary specification
Vertical line driver and DC-DC converter for Full Frame and Frame Transfer CCD image sensors
FEATURES • Enables compact and cost effective camera design • Eight two-level low-ohmic line drivers suitable for Philips Full Frame (FF) and Frame Transfer (FT) CCD image sensors • Versatile programmable DC-DC converters and voltage regulators to create all required low-noise supply voltages for the Philips FT CCD sensor family and for the on-chip drivers • DC-DC converter can be operated with an on-chip free running oscillator or with an external clock • Wide supply range also suitable for direct use on batteries • Electronic shutter driver (charge reset) • Fast start-up • DC ready signal available indicating the TDA9991HL has started up • 3-wire serial bus • Separate digital supply voltage for optimal interfacing with DSP circuit and serial bus • Low current consumption in Power-down mode.
APPLICATIONS • Digital still camera • Desktop video camera • Security camera • Camcorder • DSP applications.
GENERAL DESCRIPTION The TDA9991HL forms the interface between the pulse pattern generator and the CCD image sensor in camera systems and minimizes the component count significantly by integration of various functions.
The device contains eight vertical line drivers, a shutter driver for charge reset, a versatile programmable DC-DC converter, a non-programmable DC-DC converter and voltage regulators which create all required low noise supply voltages for FT and FF CCD sensors.
A three wire serial bus, similar to the ones used in the Philips front-end ICs (TDA8786 and TDA8783) is used for programming the devic...
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