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AD7876BQ データシート(PDF) 2 Page - Analog Devices |
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AD7876BQ データシート(HTML) 2 Page - Analog Devices |
2 / 20 page AD7870 Parameter J, A l K, B l L, C l S l T l Units Test Conditions/Comments DYNAMIC PERFORMANCE 2 Signal to Noise Ratio 3 (SNR) @ +25 °C 70 70 72 69 69 dB min VIN = 10 kHz Sine Wave, fSAMPLE = 100 kHz TMIN to TMAX 70 70 71 69 69 dB min Typically 71.5 dB for 0 < VIN < 50 kHz Total Harmonic Distortion (THD) –80 –80 –80 –78 –78 dB max VIN = 10 kHz Sine Wave, fSAMPLE = 100 kHz Typically –86 dB for 0 < VIN < 50 kHz Peak Harmonic or Spurious Noise –80 –80 –80 –78 –78 dB max VIN = 10 kHz, fSAMPLE = 100 kHz Typically –86 dB for 0 < VIN < 50 kHz Intermodulation Distortion (IMD) Second Order Terms –80 –80 –80 –78 –78 dB max fa = 9 kHz, fb = 9.5 kHz, fSAMPLE = 50 kHz Third Order Terms –80 –80 –80 –78 –78 dB max fa = 9 kHz, fb = 9.5 kHz, fSAMPLE = 50 kHz Track/Hold Acquisition Time 2 2 2 2 2 µs max DC ACCURACY Resolution 12 12 12 12 12 Bits Minimum Resolution for which No Missing Codes are Guaranteed 12 12 12 12 12 Bits Integral Nonlinearity ±1/2 ±1/2 ±1/4 ±1/2 ±1/2 LSB typ Integral Nonlinearity ±1 ±1/2 ±1 LSB max Differential Nonlinearity ±1 ±1 ±1 LSB max Bipolar Zero Error ±5 ±5 ±5 ±5 ±5 LSB max Positive Full-Scale Error 4 ±5 ±5 ±5 ±5 ±5 LSB max Negative Full-Scale Error4 ±5 ±5 ±5 ±5 ±5 LSB max ANALOG INPUT Input Voltage Range ±3 ±3 ±3 ±3 ±3 Volts Input Current ±500 ±500 ±500 ±500 ±500 µA max REFERENCE OUTPUT REF OUT @ +25 °C 2.99 2.99 2.99 2.99 2.99 V min 3.01 3.01 3.01 3.01 3.01 V max REF OUT Tempco ±60 ±60 ±35 ±60 ±35 ppm/ °C max Reference Load Sensitivity ( ∆REF OUT/∆I) ±1 ±1 ±1 ±1 ±1 mV max Reference Load Current Change (0–500 µA) Reference Load Should Not Be Changed During Conversion. LOGIC INPUTS Input High Voltage, VINH 2.4 2.4 2.4 2.4 2.4 V min VDD = 5 V ± 5% Input Low Voltage, VINL 0.8 0.8 0.8 0.8 0.8 V max VDD = 5 V ± 5% Input Current, IIN ±10 ±10 ±10 ±10 ±10 µA max VIN = 0 V to VDD Input Current (12/ 8/CLK Input Only) ±10 ±10 ±10 ±10 ±10 µA max VIN = VSS to VDD Input Capacitance, CIN 5 10 10 10 10 10 pF max LOGIC OUTPUTS Output High Voltage, VOH 4.0 4.0 4.0 4.0 4.0 V min ISOURCE = 40 µA Output Low Voltage, VOL 0.4 0.4 0.4 0.4 0.4 V max ISINK = 1.6 mA DB11–DB0 Floating-State Leakage Current ±10 ±10 ±10 ±10 ±10 µA max Floating-State Output Capacitance 5 15 15 15 15 15 pF max CONVERSION TIME External Clock (fCLK = 2.5 MHz) 8 8 8 8 8 µs max Internal Clock 7/9 7/9 7/9 7/9 7/9 µs min/µs max POWER REQUIREMENTS VDD +5 +5 +5 +5 +5 V nom ±5% for Specified Performance VSS –5 –5 –5 –5 –5 V nom ±5% for Specified Performance IDD 13 13 13 13 13 mA max Typically 8 mA ISS 6 6 6 6 6 mA max Typically 4 mA Power Dissipation 95 95 95 95 95 mW max Typically 60 mW NOTES 1Temperature ranges are as follows: J, K, L Versions; 0 °C to +70°C: A, B, C Versions; –25°C to +85°C: S, T Versions; –55°C to +125°C. 2V IN (pk-pk) = ± 3 V. 3SNR calculation includes distortion and noise components. 4Measured with respect to internal reference and includes bipolar offset error. 5Sample tested @ +25 °C to ensure compliance. Specifications subject to change without notice. AD7870/AD7875/AD7876–SPECIFICATIONS (V DD = +5 V 5%, VSS = –5 V 5%, A6ND = DGND = 0 V, fCLK = 2.5 MHz external, unless otherwise stated. All Specifications Tmin to Tmax unless otherwise noted.) REV. B –2– |
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