ADC-100 FARADAY | Alldatasheet

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© Faraday Technology. As part of continual product improvement the specifications, details and dimensions shown in this publication are subject to change without notice Fara064d.doc Page 1 of 5 Apr-01 (E) The ADC-100 range converts analogue video in various formats to 10 or 12 bit parallel digital video. The range provides a complete front end solution for the digitising of high quality component, composite or s-video. The module incorporates a tightly specified anti-aliasing filter, an A-D converter and a digital filter all on a board measuring no more than 1044mm 2 (1.65sq in). Features Typical applications

  • ± 5V operation • Video Broadcast and studio equipment
  • High impedance input stage • Digital Cameras
  • Filtered and buffered video o/p • Telecommunications equipment
  • User just provides pixel clock and clamp pulse • Video Frame Grabber Cards for PCs
  • Choice of 10 or 12 bit A-D • Closed Circuit Security
  • Matched digital delay Y,Pb/Pr units (to eliminate additional delay lines) ADC-100 BLOCK DIAGRAM ADC-100 RANGE VIDEO FRONT-END MODULES

Fara064d.doc Page 2 of 5 Apr-01 (E) Technical Description The ADC-100 range of modules are a complete front end solution for digitising analogue video. They comprise all buffering and filtering components required - allowing the user to connect directly to the video source. A dc clamp is provided to ensure that the black level is accurately set before being presented to the A-D converter. The modules utilise 2x oversampling to minimise the size of the filter components and achieve high performance. The subsequent data is decimated by high performance low pass digital filters to provide output data with standard sampling rates. All this is achieved transparently to the user; the only control signals required are a back porch clamp signal, a sync pulse to align the digital filter and an appropriate clock. For further details of the digital filter functionality consult Fairchild datasheet TMC2242. Typical I/P circuit for minimal tilt

Fara064d.doc Page 3 of 5 Apr-01 (E) Specification High Spec. analogue filter ADC-100, ADC-101, ADC-120, ADC-122 ADC-121 Analogue Filter Start of Stopband 21.0 MHz 10.5 MHz Analogue Filter Stopband rejection 45 dB 45 dB Analogue Filter Group delay ripple < 3 ns to 3.58 MHz < 10 ns to 6.0 MHz < 6 ns to 1.64 MHz < 20 ns to 2.75 MHz Differential gain 1% typical 1% typical Differential phase 1 ° typical 1 ° typical Supply current + 300 mA +5v 20 mA -5v + 300 mA +5v 20 mA -5v Relaxed analogue filter ADC-110R, ADC-111R, Analogue Filter Passband 6.0 MHz with ripple of ± 0.1 dB. Analogue Filter Start of Stopband 21.0 MHz Analogue Filter Stopband rejection 35 dB Analogue Filter Group delay ripple < 3 ns to 3.58 MHz < 16 ns to 6.0 MHz Differential gain 1.5% typical Differential phase 1.5 ° typical Supply current + 300 mA +5v 20 mA -5v Digital Filter details ADC-100, ADC-101, ADC-110, ADC-111, ADC-120, ADC-121 ADC-122 Filter Type TMC2242A TMC2242C Passband ± 0.01 dB to 0.22 fs ± 0.014 dB to 0.22 fs Attenuation at 0.25 fs - 6 dB - 6 dB Stopband attenuation > 59 dB from 0.28 fs > 56 dB from 0.29 fs Data latency 34 clk periods 68 clk periods Note: The ADC-122R uses the TMC2242C digital filter which features a double delay mode enabling the luminance module (fs = 27 MHz) to output data synchronously with the colour difference modules (fs = 13.5 MHz). This eliminates the need for a digital delay of the luminance data by 34 clock cycles. For further information consult Fairchild datasheet TMC2242C. An absolute delay difference of 37 ns exists between the ADC-122R and ADC-121R due to the differences in the analogue filters.

Fara064d.doc Page 4 of 5 Apr-01 (E) Module Details Order Code Gain Black Level Comments Application MMC Equivalent ADC-100R 1.6 230 10-bit FE-100H10-1 ADC-100B 1.6 230 12-bit Composite, Luminance (S-video), digital video decoder front end. High performance applications. fs = 27 MHz FE-100H12-1 ADC-101R 1.6 512 10-bit FE-100H10-2 ADC-101B 1.6 512 12-bit Chrominance , digital video decoder front end. High performance applications. fs = 27 MHz FE-100H12-2 ADC-110R 1.6 230 10-bit relaxed filter Composite, Luminance (S-video), digital video decoder front end. fs = 27 MHz FE-100M-1 ADC-111R 1.6 230 10-bit relaxed filter Chrominance , digital video decoder front end fs = 27 MHz FE-100M-2 ADC-120R 2.475 64 10-bit CCIR-601-2 levels Y input (Component Video) , Expanded active video range. fs = 27 MHz not available ADC-121R 2.475 512 10-bit CCIR-601-2 levels

2.75 MHz Filter

Pb,Pr input (Component video), Expanded active video range. fs =13.5 MHz not available ADC-122R 2.475 64 10-bit CCIR-601-2 levels Double delay Y input (Component Video) , Expanded active video range. fs = 27 MHz Matched digital filter delay. Note: PROVISIONAL DATA not available The modules are fitted with a high performance 10-bit analogue to digital converter as standard (R- suffix) but they are also available with a 12-bit analogue converter (B suffix) Devices are normally supplied with a Fairchild half band filter. The units can be optionally supplied with other compatible half band filters, or with no digital filter at the customers request. Application Notes The ADC modules incorporate a clamp circuit which must be fed with a back porch signal derived on the users pcb. This can easily be generated using standard sync separators. The user has control over digital filter inputs DEC_N, OE_N and SYNC appropriately. These inputs allow the user to synchronise the decimation of pixel data and multiplex the outputs from modules. For further details the user should consult the Fairchild datasheet TMC2242. The insertion delay difference between the component modules ADC122R and ADC121R can be eliminated by latching the Luminance data for 1 clock cycle within the application. Note: This product is Aqueous Washable.

Fara064d.doc Page 5 of 5 Apr-01 (E) Faraday Technology Ltd. Tel: + 44 (0)1782 661501 Croft Road Industrial Estate, Fax: + 44 (0)1782 630101 Newcastle, Staffordshire Email: sales@faradaytech.co.uk