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TDA8786G Fiches technique(PDF) 2 Page - NXP Semiconductors |
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TDA8786G Fiches technique(HTML) 2 Page - NXP Semiconductors |
2 / 28 page 1997 Nov 17 2 Philips Semiconductors Product specification 10-bit analog-to-digital interface for CCD cameras TDA8786; TDA8786A FEATURES • Correlated Double Sampling (CDS), AGC, soft clipper, pre-blanking, 10-bit ADC and reference regulator included • Fully programmable via a 3-wire serial interface • Sampling frequency up to 18 MHz • AGC gain from 3.5 to 33.5 dB (in 0.1 dB steps) • Programmable soft clipper for white compression (starting at 40% of the input signal) • Standby mode available for each block for power saving applications (19 mW) • 6 dB fixed gain analog output for analog iris control • 8-bit and 10-bit DAC included for analog settings • Low power consumption of only 475 mW (typ.) • 5 V operation and 2.5 to 5 V operation for the digital outputs • CDS control pulse: TDA8786 = HIGH; TDA8786A = LOW • TTL compatible inputs, TTL and CMOS compatible outputs. GENERAL DESCRIPTION The TDA8786; TDA8786A is a 10-bit analog-to-digital interface for CCD cameras. The device includes a correlated double sampling circuit, AGC, a soft clipper circuit and a low power 10-bit Analog-to-Digital Converter (ADC) together with its reference voltage regulator. The AGC and soft clipper circuits are controlled by on-chip DACs via a serial interface. A 10-bit DAC controls the ADC input clamp level. A pre-blanking function is also included. An additional DAC is provided for additional system controls; its output voltage range is 1.4 V (p-p) which is available at pin OFDOUT. APPLICATIONS • CCD camera systems. QUICK REFERENCE DATA ORDERING INFORMATION SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT VCCA analog supply voltage 4.5 4.75 5.5 V VCCD digital supply voltage 4.5 4.75 5.5 V VCCO digital outputs supply voltage 2.5 2.6 5.5 V ICCA analog supply current − 83 − mA ICCD digital supply current − 16 − mA ICCO digital outputs supply current fCLK = 18 MHz; CL = 20 pF; ramp input − 1 − mA ADCres ADC resolution − 10 − bits Vi(CDS)(p-p) CDS input voltage (peak-to-peak value) − 400 1200 mV GCDS CDS output amplifier gain − 6 − dB fCLK(max) maximum clock frequency 18 −− MHz AGCdyn AGC dynamic range − 30 − dB Ntot(rms) total noise from CDS input to ADC output (RMS value) gain = 3.5 dB − 0.5 − LSB Ptot total power consumption − 475 − mW TYPE NUMBER PACKAGE NAME DESCRIPTION VERSION TDA8786G LQFP48 plastic low profile quad flat package; 48 leads; body 7 × 7 × 1.4 mm SOT313-2 TDA8786AG |
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