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ADC-304-3 Folha de dados(PDF) 2 Page - List of Unclassifed Manufacturers |
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ADC-304-3 Folha de dados(HTML) 2 Page - List of Unclassifed Manufacturers |
2 / 5 page ® ® ADC-304 FUNCTIONAL SPECIFICATIONS Unless otherwise noted, the following specifications apply to the ADC-304 when used either with a single or dual power source. The test conditions are: For single power supply operation: For dual power supply operation: +VS = +5V, DIG GND = 0V +VS = +5V, DIG GND = 0V –VS = 0V, VT = +5V –VS = –5.2V, VT = 0V, VB = +3V, TA = +25°C VB = –2V, TA = +25°C ANA GND = +5V, fs = 20MHz ANA GND = 0V, fs = 20MHz ANALOG INPUTS MIN. TYP. MAX. UNITS Input Range VB VT Volts Input Capacitance — 30 35 pF Input Bias Current 15 50 100 µA Offset Voltage VT –8 –13 –19 mV VB 0 +5 +11 mV DIGITAL INPUTS Logic Levels Logic “1” +2.0 — — Volts Logic “0” — — +0.8 Volts Logic Input Currents Logic “1” — –100 –150 µA Logic “0” –0.1 –0.32 –0.5 mA PERFORMANCE Conversion Rate 20 — — MHz Integral Nonlinearity — — ±1/2 LSB Differential Nonlinearity — — ±1/2 LSB Differential Gain Error — — 1.5 % Differential Phase Error — — 0.5 degrees Aperture Delay Ta 5 7 9 ns Aperture Uncertainty — 30 — ps Signal-to-Noise and Distortion (Vin = full scale, fs = 20MHz) fin = 1MHz 47 dB fin = 5MHz 43 dB fin = 10MHz 35 dB Clock Pulse Width Tpw1 35 — — ns Tpw0 10 — — ns Reference Pin Current 11 15 18 mA Reference Resistance (VT to VB) — 130 — Ohms Reference Input (dual supply) VT –0.1 0 +0.1 Volts VB –1.8 –2.0 –2.2 Volts Footnotes: fin = 1kHz, ramp NTSC 40 IRE-modulated ramp, fs = 14.3MHz ABSOLUTE MAXIMUM RATINGS PARAMETERS LIMITS UNITS Supply Voltages +VS to GND 0 to +6 Volts –VS to GND 0 to –6 Volts Input Voltage (Analog) Vin –VS to (ANA GND + 0.3) Volts (dual power supply) Input Voltage (Reference) VT, VB, VM –VS to (ANA GND + 0.3) Volts (dual power supply) VT – VB 2.5 Volts Input Current IM –3.0 to +3.0 mA Input Voltage (Digital) Digital Inputs –0.5 to +VS Volts DIGITAL OUTPUTS MIN. TYP. MAX. UNITS Resolution and Output Coding 8 bits Straight binary Complementary binary Two’s complement Complementary two’s complement Logic Levels Logic “1” +2.7 +3.4 — Volts Logic “0” — — +0.5 Volts Logic Loading “1” — –500 — µA Logic Loading “0” — — +3 mA Output Data Delay TDLH 15 20 30 ns TDHL 22 26 35 ns POWER REQUIREMENTS Single Power Supply Supply Voltage = +VS +4.75 +5.0 +5.25 Volts Supply Voltage = –VS — 0 — Volts Supply Current = +IS +56 +71 +91 mA Power Dissipation 280 355 455 mW Dual Power Supply Supply Voltage = +VS +4.75 +5.0 +5.25 Volts Supply Voltage = –VS –4.75 –5.2 –5.5 Volts Supply Current = +IS +7 +10 +14 mA Supply Current = –IS –50 –62 –78 mA Power Dissipation 295 375 476 mW PHYSICAL/ENVIRONMENTAL Operating Temperature –20 — +75 °C Storage Temperature –55 — +150 °C TECHNICAL NOTES 1. The two DIGITAL GND pins (pins 5 and 11 on the DIP, pins 12 and 18 on the SOP) are not connected to each other internally and neither are the two +5V POWER pins (6 and 10 on the DIP, 13 and 17 on the SOP). All four pins must be externally connected to the appropriate pcb patterns. Also, the DIGITAL GND and ANALOG GND pins are not connected to each other internally. 2. Layout of the analog and digital sections should be separated to reduce interference from noise. To further guard against unwanted noise, it is recommended to bypass, as close as possible, the voltage supply pins to their respective ground pins with 1µF tantalum and 0.01µF ceramic disk capacitors in parallel. 3. The input capacitance of the analog input is much smaller than that of a typical flash A/D converter. It is necessary to use an amplifier with sufficient bandwidth and driving power. The analog input pins are separated internally, so they should be connected together externally. If the ADC-304 is driven with a low output impedance amplifier, parasitic oscillations may occur. These parasitic oscillations can be prevented by introducing a small resistance of 2 to 10 Ω between the amplifier output and the ADC-304’s A/D input. This resistance must have a very low value of series inductance at high frequencies. Note that each of the analog input pins is divided in this manner with these resistances. Connect the driving amplifier as close as possible to the A/D input of the ADC-304. 2 |
Nº de peça semelhante - ADC-304-3 |
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Descrição semelhante - ADC-304-3 |
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