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AD7776 Arkusz danych(PDF) 2 Page - Analog Devices |
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AD7776 Arkusz danych(HTML) 2 Page - Analog Devices |
2 / 12 page REV. 0 –2– AD7776/AD7777/AD7778–SPECIFICATIONS (V CC = +5 V 5%; AGND = DGND = O V; CLKIN = 8 MHz; RTN = O V; CREFIN = 10 nF; all specifications TMIN to TMAX unless otherwise noted.) Parameter A Versions 1 Units Conditions/Comments DC ACCURACY Resolution 2 10 Bits Relative Accuracy ±1 LSB max See Terminology Differential Nonlinearity ±1 LSB max No Missing Codes; See Terminology Bias Offset Error ±12 LSB max See Terminology Bias Offset Error Match 10 LSB max Between Channels, AD7777/AD7778 Only; See Terminology Plus or Minus Full-Scale Error ±12 LSB max See Terminology Plus or Minus Full-Scale Error Match 10 LSB max Between Channels, AD7777/AD7778 Only; See Terminology ANALOG INPUTS Input Voltage Range All Inputs VBIAS ± VSWING V min/V max Input Current +200 µA max VIN = VBIAS ± VSWING; Any Channel REFERENCE INPUT REFIN 1.9/2.1 V min/V max For Specified Performance REFIN Input Current +200 µA max REFERENCE OUTPUT REFOUT 1.9/2.1 V min/V max Nominal REFOUT = 2.0 V DC Output Impedance 5 Ω typ Reference Load Change ±2 mV max For Reference Load Current Change of 0 to ±500 µA ±5 mV max For Reference Load Current Change of 0 to ±1 mA Reference Load Should Not Change During Conversion Short Circuit Current 3 20 mA max See Terminology LOGIC OUTPUTS DB0–DB9, BUSY/INT VOL, Output Low Voltage 0.4 V max ISINK = 1.6 mA VOH, Output High Voltage 4.0 V min ISOURCE = 200 µA Floating State Leakage Current ±10 µA max Floating State Capacitance 3 10 pF max ADC Output Coding Twos Complement LOGIC INPUTS DB0–DB9, CS, WR, RD, CLKIN Input Low Voltage, VINL 0.8 V max Input High Voltage, VINH 2.4 V min Input Leakage Current 10 µA max Input Capacitance 3 10 pF max CONVERSION TIMING Acquisition Time 4.5 tCLKIN ns min See Terminology 5.5 tCLKIN + 70 ns max Single Conversion 14 tCLKIN ns max Double Conversion 28 tCLKIN ns max tCLKIN 125/500 ns min/ns max Period of Input Clock CLKIN tCLKIN High 50 ns min Minimum High Time for CLKIN tCLKIN Low 40 ns min Minimum Low Time for CLKIN POWER REQUIREMENTS VCC Range +4.75/+5.25 V min/V max For Specified Performance ICC, Normal Mode 15 mA max CS = RD = +5 V, CR8 = 0 ICC, Power-Down Mode 1.5 mA max CR8 = 1. All Linear Circuitry OFF Power-Up Time to Operational Specifications 500 µs max From Power-Down Mode DYNAMIC PERFORMANCE See Terminology Signal to Noise and Distortion S/(N+D) Ratio –57 dB min VIN = 99.88 kHz Full-Scale Sine Wave with fSAMPLING = 380.95 kHz Total Harmonic Distortion (THD) –60 dB min VIN = 99.88 kHz Full-Scale Sine Wave with fSAMPLING = 380.95 kHz Intermodulation Distortion (IMD) –75 dB typ fa = 103.2 kHz, fb = 96.5 kHz with fSAMPLING = 380.95 kHz. Both Signals Are Sine Waves at Half-Scale Amplitude Channel-to-Channel Isolation –90 dB typ VIN = 100 kHz Full-Scale Sine Wave with fSAMPLING = 380.95 kHz NOTES 1Temperature range as follows: A = –40 °C to +85°C. 21 LSB = (2 × V SWING)/1024 = 1.95 mV for VSWING = 1.0 V. 3Guaranteed by design, not production tested. Specifications subject to change without notice. |
Podobny numer części - AD7776 |
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Podobny opis - AD7776 |
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