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TDA8785H Datasheet(PDF) 2 Page - NXP Semiconductors |
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TDA8785H Datasheet(HTML) 2 Page - NXP Semiconductors |
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2 / 24 page  1997 Dec 18 2 Philips Semiconductors Product specification 8-bit high-speed analog-to-digital converter with gain and offset controls TDA8785 FEATURES • 8-bit analog-to-digital converter (ADC) • 8-bit digital-to-analog converter (DAC) • Sampling rate up to 30 Msps for both ADC and DAC • Binary or two’s complement 3-state TTL outputs • TTL compatible inputs and outputs • 100 MHz variable gain amplifier (0 to 20 dB) externally controlled • All analog inputs and outputs are differential (can also be used in single-ended format) • Analog input signal from 0.1 to 1.0 V (p-p) differential • Offset amplifier with: – Slow offset control ( ±250 mV) – Fast offset control ( ±500 mV) eventually driven by internal DAC. • ADC output code of 8 (typ.) when analog input signal and offset correction inputs are 0 V • Gain, slow offset control inputs and DAC output swing of 1.5 V (p-p) range (2.75 ±0.75 V) • 2.75 V reference voltage • Internal references for ADC and DAC. APPLICATIONS • CCD type of systems • Scanner • Copier • Video acquisition. GENERAL DESCRIPTION The TDA8785 is an 8-bit analog-to-digital converter with gain and offset controls for the input signal. An internal 8-bit DAC provides fast offsets control. QUICK REFERENCE DATA ORDERING INFORMATION SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT VCCA1 analog supply voltage 1 4.75 5.0 5.25 V VCCA2 analog supply voltage 2 4.75 5.0 5.25 V VCCD digital supply voltage 4.75 5.0 5.25 V VCCO TTL output supply voltage 4.75 5.0 5.25 V ICCA analog supply current − 80 − mA ICCD digital supply current − 30 − mA ICCO TTL output supply current − 9 − mA INL integral non-linearity 0 to 20 dB gain; ramp input −±0.7 ±1.8 LSB DNL differential non-linearity 0 to 20 dB gain; ramp input −±0.2 ±0.7 LSB fclk(max) maximum clock frequency ADC and DAC 30 −− MHz B controlled gain amplifier bandwidth − 100 − MHz Ptot total power dissipation − 600 − mW TYPE NUMBER PACKAGE NAME DESCRIPTION VERSION TDA8785H QFP44 plastic quad flat package; 44 leads (lead length 1.3 mm); body 10 × 10 × 1.75 mm SOT307-2 |
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