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AD7818ARM データシート(PDF) 3 Page - Analog Devices |
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AD7818ARM データシート(HTML) 3 Page - Analog Devices |
3 / 20 page Data Sheet AD7817/AD7818 Rev. D | Page 3 of 20 SPECIFICATIONS VDD = 2.7 V to 5.5 V, GND = 0 V, REFIN = 2.5 V, unless otherwise noted. The AD7817 temperature sensor is specified with an external 2.5 V reference, and the AD7818 temperature sensor is specified with an on-chip reference. For VDD = 2.7 V, TA = 85°C maximum and temperature sensor measurement error = ±3°C. Table 1. Parameter AVersion1 BVersion1 SVersion1 Unit Test Conditions/Comments DYNAMIC PERFORMANCE (AD7817 ONLY) Sample rate = 100 kSPS, any channel, f IN = 20 kHz Signal-to-(Noise + Distortion) Ratio2 58 58 58 dB min Total Harmonic Distortion2 –65 −65 −65 dB max −75 dB typical Peak Harmonic or Spurious Noise2 –65 −65 −65 dB max −75 dB typical Intermodulation Distortion2 fa =19.9 kHz, fb = 20.1 kHz Second-Order Terms –67 −67 −67 dB typ Third-Order Terms –67 −67 −67 dB typ Channel-to-Channel Isolation2 –80 −80 −80 dB typ f IN = 20 kHz DC ACCURACY (AD7817 ONLY) Any channel Resolution 10 10 10 Bits Minimum Resolution for Which No Missing Codes are Guaranteed 10 10 10 Relative Accuracy2 ±1 ±1 ±1 LSB max Differential Nonlinearity2 ±1 ±1 ±1 LSB max Gain Error2 ±2 ±2 ±2 LSB max External reference ±10 ±10 +20/−10 LSB max Internal reference Gain Error Match2 ±1/2 ±1/2 ±1/2 LSB max Offset Error2 ±2 ±2 ±2 LSB max Offset Error Match ±1/2 ±1/2 ±1/2 LSB max TEMPERATURE SENSOR (AD7817 ONLY) Measurement Error External reference V REF = 2.5 V Ambient Temperature 25°C ±2 ±1 ±2 °C max T MIN to TMAX ±3 ±2 ±3 °C max Measurement Error On-chip reference Ambient Temperature 25°C ±2.25 ±2.25 ±2.25 °C max T MIN to TMAX ±3 ±3 ±6 °C max Temperature Resolution 1/4 1/4 1/4 °C/LSB REFERENCE INPUT (AD7817 ONLY)3, 4 REF IN Input Voltage Range 3 2.625 2.625 2.625 V max 2.5 V + 5% 2.375 2.375 2.375 V min 2.5 V − 5% Input Impedance 40 40 40 kΩ min Input Capacitance 10 10 10 pF max ON-CHIP REFERENCE (AD7817 ONLY)5 Nominal 2.5 V Temperature Coefficient3 80 80 150 ppm/°C typ CONVERSION RATE (AD7817 ONLY) Track-and-Hold Acquisition Time4 400 400 400 ns max Source Impedance < 10 Ω Conversion Time Temperature Sensor 27 27 27 µs max Channel 1 to Channel 4 9 9 9 μs max |
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同様の説明 - AD7818ARM |
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