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AD7818ARM-REEL Arkusz danych(PDF) 3 Page - Analog Devices |
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AD7818ARM-REEL Arkusz danych(HTML) 3 Page - Analog Devices |
3 / 20 page REV. C AD7816/AD7817/AD7818 –3– Parameter A Version Unit Test Conditions/Comments DYNAMIC PERFORMANCE (AD7818 Only) Sample Rate = 100 kSPS, Any Channel, fIN = 20 kHz Signal to (Noise + Distortion) Ratio 2 57 dB min Total Harmonic Distortion 2 –65 dB max –75 dB typ Peak Harmonic or Spurious Noise 2 –67 dB typ –75 dB typ Intermodulation Distortion 2 fa = 19.9 kHz, fb = 20.1 kHz Second Order Terms –67 dB typ Third Order Terms –67 dB typ Channel-to-Channel Isolation 2 –80 dB typ fIN = 20 kHz DC ACCURACY (AD7818 Only) Any Channel Resolution 10 Bits Minimum Resolution for Which No Missing Codes are Guaranteed 10 Bits Relative Accuracy 2 1 LSB max Differential Nonlinearity 2 1 LSB max Gain Error 2 10 LSB max Offset Error 2 4 LSB max TEMPERATURE SENSOR 1 Measurement Error External Reference VREF = 2.5 V Ambient Temperature 25 °C 2 °C max TMIN to TMAX 3 °C max Measurement Error On-Chip Reference Ambient Temperature 25 °C 2 °C max TMIN to TMAX 3 °C max Temperature Resolution 1/4 °C/LSB REFERENCE INPUT 3, 4 (AD7816 Only) REFIN Input Voltage Range 3 2.625 V max 2.5 V + 5% 2.375 V min 2.5 V – 5% Input Impedance 50 k Ω min Input Capacitance 10 pF max ON-CHIP REFERENCE 5 Nominal 2.5 V Temperature Coefficient 3 30 ppm/ °C typ CONVERSION RATE Track/Hold Acquisition Time 4 400 ns max Source Impedance < 10 Ω Conversion Time Temperature Sensor 27 µs max Channel 1 9 µs max (AD7818 Only) POWER REQUIREMENTS VDD 5.5 V max For Specified Performance 2.7 V min IDD Logic Inputs = 0 V or VDD Normal Operation 2 mA max 1.3 mA typ Using External Reference 1.75 mA max 2.5 V External Reference Connected Power-Down (VDD = 5 V) 10.75 µA max 6 µA typ Power-Down (VDD = 3 V) 4.5 µA max 2 µA typ Auto Power-Down Mode VDD = 3 V 10 SPS Throughput Rate 6.4 µW typ See Power vs. Throughput Section for 1 kSPS Throughput Rate 48.8 µW typ Description of Power Dissipation in 10 kSPS Throughput Rate 434 µW typ Auto Power-Down Mode Power-Down 13.5 µW max Typically 6 µW AD7816/AD7818 6–SPECIFICATIONS1 (VDD=2.7Vto5.5V,GND=0V,REFIN=2.5Vunless otherwise noted) |
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