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AD7891ACHIPS-2 Datasheet(PDF) 2 Page - Analog Devices |
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AD7891ACHIPS-2 Datasheet(HTML) 2 Page - Analog Devices |
2 / 20 page –2– REV. D AD7891–SPECIFICATIONS (VDD = 5 V 5%, AGND = DGND = 0 V, REF IN = 2.5 V. All specifications TMIN to TMAX, unless otherwise noted.) Parameter A Version 1 B Version Y Version Unit Test Conditions/Comments DYNAMIC PERFORMANCE 2 Sample Rate = 454.5 kSPS 3 (AD7891-1), 500 kSPS 3 (AD7891-2). Any channel. Signal-to-(Noise + Distortion) Ratio 4 @ 25 ∞C70 7070dB min TMIN to TMAX 70 70 70 dB min Total Harmonic Distortion 4 –78 –78 –78 dB max Peak Harmonic or Spurious Noise 4 –80 –80 –80 dB max Intermodulation Distortion 4 fa = 9 kHz, fb = 9.5 kHz. Second-Order Terms –80 –80 –80 dB typ Third-Order Terms –80 –80 –80 dB typ Channel-to-Channel Isolation 4 –80 –80 –80 dB max DC ACCURACY Any channel. Resolution 12 12 12 Bits Minimum Resolution for which No Missing Codes Are Guaranteed 12 12 12 Bits Relative Accuracy 4 ±1 ±0.75 ±1 LSB max Differential Nonlinearity 4 ±1 ±1 ±1 LSB max Positive Full-Scale Error 4 ±3 ±3 ±3 LSB max Positive Full-Scale Error Match 4, 5 0.6 0.6 0.6 LSB typ 1.5 LSB max. Unipolar Offset Error ±4 ±4 ±4 LSB max Input ranges of 0 V to 2.5 V, 0 V to 5 V. Unipolar Offset Error Match 5 0.1 0.1 0.1 LSB typ 1 LSB max. Negative Full-Scale Error 4 ±3 ±3 ±3 LSB max Input ranges of ±2.5 V, ±5V, ±10 V. Negative Full-Scale Error Match 4, 5 0.6 0.6 0.6 LSB typ 1.5 LSB max. Bipolar Zero Error ±4 ±4 ±4 LSB max Input ranges of ±2.5 V, ±5V, ±10 V. Bipolar Zero Error Match 5 0.2 0.2 0.2 LSB typ 1.5 LSB max. ANALOG INPUTS AD7891-1 Input Voltage Range ±5 ±5 ±5V Input applied to both VINXA and VINXB. ±10 ±10 ±10 V Input applied to VINXA, VINXB = AGND. AD7891-1 VINXA Input Resistance 7.5 7.5 7.5 k W min Input range of ±5V. AD7891-1 VINXA Input Resistance 15 15 15 k W min Input range of ±10 V. AD7891-2 Input Voltage Range 0 to 2.5 0 to 2.5 0 to 2.5 V Input applied to both VINXA and VINXB. 0 to 5 0 to 5 0 to 5 V Input applied to VINXA, VINXB = AGND. ±2.5 ±2.5 ±2.5 V Input applied to VINXA, VINXB = REF IN 6. AD7891-2 VINXA Input Resistance 1.5 1.5 1.5 k W min Input ranges of ±2.5 V and 0 V to 5 V. AD7891-2 VINXA Input Current ±50 ±50 ±50 nA max Input range of 0 V to 2.5 V. REFERENCE INPUT/OUTPUT REF IN Input Voltage Range 2.375/2.625 2.375/2.625 2.375/2.625 V min/V max 2.5 V ± 5%. Input Impedance 1.6 1.6 1.6 k W min Resistor connected to internal reference node. Input Capacitance 5 10 10 10 pF max REF OUT Output Voltage 2.5 2.5 2.5 V nom REF OUT Error @ 25 ∞C ±10 ±10 ±10 mV max TMIN to TMAX ±20 ±20 ±20 mV max REF OUT Temperature Coefficient 25 25 25 ppm/ ∞C typ REF OUT Output Impedance 5 5 5 k W nom See REF IN input impedance. LOGIC INPUTS Input High Voltage, VINH 2.4 2.4 2.4 V min VDD = 5 V ± 5%. Input Low Voltage, VINL 0.8 0.8 0.8 V max VDD = 5 V ± 5%. Input Current, IINH ±10 ±10 ±10 mA max Input Capacitance 5 C IN 10 10 10 pF max |
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