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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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AD7821 데이터시트(PDF) 2 Page - Analog Devices |
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AD7821 데이터시트(HTML) 2 Page - Analog Devices |
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2 / 12 page  REV. A –2– AD7821–SPECIFICATIONS VDD = +5 V 5%, GND = 0 V. Unipolar Input Range: VSS = GND, VREF(+) = 5 V, VREF(–) = GND. Bipolar Input Range: VSS = –5 V 5%, VREF(+) = 2.5 V, VREF(–) = –2.5 V. These test conditions apply unless otherwise stated. All specifications TMIN to TMAX unless otherwise noted. Specifications apply for RD Mode (Pin 7 = 0 V). Parameter K Version 1 B, T Versions Units Comments UNIPOLAR INPUT RANGE Resolution 2 8 8 Bits Total Unadjusted Error 3 ± 1 ± 1 LSB max Minimum Resolution for which No Missing Codes are Guaranteed 8 8 Bits BIPOLAR INPUT RANGE Resolution 2 8 8 Bits Zero Code Error ± 1 ± 1 LSB max Full Scale Error ± 1 ± 1 LSB max Signal-to-Noise Ratio (SNR) 3 45 45 dB min VIN = 99.85 kHz Full-Scale Sine Wave with fSAMPLING = 500 kHz Total Harmonic Distortion (THD) 3 –50 –50 dB max VIN = 99.85 kHz Full-Scale Sine Wave with fSAMPLING = 500 kHz Peak Harmonic or Spurious Noise 3 –50 –50 dB max VIN = 99.85 kHz Full-Scale Sine Wave with fSAMPLING = 500 kHz Intermodulation Distortion (IMD) 3 fa (84.72 kHz) and fb (94.97 kHz) Full-Scale Sine Waves with fSAMPLING = 500 kHz –50 –50 dB max Second Order Terms –50 –50 dB max Third Order Terms Slew Rate, Tracking 3 1.6 1.6 V/ µs max 2.36 2.36 V/ µs typ REFERENCE INPUT Input Resistance 1.0/4.0 1.0/4.0 k Ω min/kΩ max VREF(+) Input Voltage Range VREF(–)/VDD VREF(–)/VDD V min/V max VREF(–) Input Voltage Range VSS/VREF(+) VSS/VREF(+) V min/V max ANALOG INPUT Input Voltage Range VREF(–)/VREF(+) VREF(–)/VREF(+) V min/ max Input Leakage Current ± 3 ± 3 µA max –5 V ≤ V IN ≤ +5 V Input Capacitance 55 55 pF typ LOGIC INPUTS CS , WR, RD VINH 2.4 2.4 V min VINL 0.8 0.8 V max IINH (CS, RD)1 1 µA max IINH (WR)3 3 µA max IINL –1 –1 µA max Input Capacitance 4 8 8 pF max Typically 5 pF MODE VINH 3.5 3.5 V min VINL 1.5 1.5 V max IINH 200 200 µA max 50 µA typ IINL –1 –1 µA max Input Capacitance 4 8 8 pF max Typically 5 pF LOGIC OUTPUTS DB0–DB7, OFL, INT VOH 4.0 4.0 V min ISOURCE = 360 µA VOL 0.4 0.4 V max ISINK = 1.6 mA IOUT (DB0–DB7) ± 3 ± 3 µA max Floating State Leakage Output Capacitance 4 (DB0–DB7) 8 8 pF max Typically 5 pF RDY VOL 0.4 0.4 V max ISINK = 2.6 mA IOUT ± 3 ± 3 µA max Floating State Leakage Output Capacitance 4 8 8 pF max Typically 5 pF POWER SUPPLY IDD 5 15 20 mA max CS = RD = 0 V ISS 100 100 µA max CS = RD = 0 V Power Dissipation 50 50 mW typ Power Supply Sensitivity ± 1/4 ± 1/4 LSB max ± 1/16 LSB typ, V DD = 4.75 V to 5.25 V, (VREF(+) = 4.75 V max for Unipolar Mode) NOTES 1Temperature Ranges are as follows: K Version = –40 °C to +85°C; B Version = –40°C to +85°C; T Version = –55°C to +125°C. 21 LSB = 19.53 mV for both the unipolar (0 V to +5 V) and bipolar (–2.5 V to +2.5 V) input ranges. 3See Terminology. 4Sample tested at +25 °C to ensure compliance. 5See Typical Performance Characteristics. Specifications subject to change without notice. |
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