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AD7731BN Datasheet(PDF) 3 Page - Analog Devices |
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AD7731BN Datasheet(HTML) 3 Page - Analog Devices |
3 / 44 page –3– REV. 0 AD7731 Parameter B Version 1 Units Conditions/Comments Absolute/Common-Mode Voltage 13 AGND + 1.2 V V min AVDD – 0.95 V V max Reference Input REF IN(+) – REF IN (–) Voltage +2.5 V nom HIREF Bit of Mode Register = 0 REF IN(+) – REF IN (–) Voltage +5 V nom HIREF Bit of Mode Register = 1 Reference DC Input Current 5.5 µA max HIREF Bit of Mode Register = 0 Reference DC Input Current 10 µA max HIREF Bit of Mode Register = 1 Absolute/Common-Mode Voltage 14 AGND – 30 mV V min AVDD + 30 mV V max NO REF Trigger Voltage 0.3 V min NO REF Bit Active If VREF Below This Voltage 0.65 V max NO REF Bit Inactive If VREF Above This Voltage LOGIC INPUTS Input Current ±10 µA max All Inputs Except SCLK and MCLK IN VINL, Input Low Voltage 0.8 V max DVDD = +5 V VINL, Input Low Voltage 0.4 V max DVDD = +3 V VINH, Input High Voltage 2.0 V min SCLK Only (Schmitt Triggered Input) VT+ 1.4/3 V min/V max DVDD = +5 V VT+ 0.95/2.5 V min/V max DVDD = +3 V VT– 0.8/1.4 V min/V max DVDD = +5 V VT– 0.4/1.1 V min/V max DVDD = +3 V VT+ – VT– 0.4/0.85 V min/V max DVDD = +5 V VT+ – VT– 0.4/0.8 V min/V max DVDD = +3 V MCLK IN Only VINL, Input Low Voltage 0.8 V max DVDD = +5 V VINL, Input Low Voltage 0.4 V max DVDD = +3 V VINH, Input High Voltage 3.5 V min DVDD = +5 V VINH, Input High Voltage 2.5 V min DVDD = +3 V LOGIC OUTPUTS (Including MCLK OUT) VOL, Output Low Voltage 0.4 V max ISINK = 800 µA Except for MCLK OUT 15. VDD 16 = +5 V VOL, Output Low Voltage 0.4 V max ISINK = 100 µA Except for MCLK OUT 15. VDD 16 = +3 V VOH, Output High Voltage 4.0 V min ISOURCE = 200 µA Except for MCLK OUT 15. VDD 16 = +5 V VOH, Output High Voltage DVDD – 0.6 V V min ISOURCE = 100 µA Except for MCLK OUT 15. VDD 16 = +3 V Floating State Leakage Current ±10 µA max Floating State Output Capacitance 3 6 pF typ TRANSDUCER BURNOUT 17 AIN1(+) Current –100 nA nom AIN1(–) Current 100 nA nom Initial Tolerance @ 25 °C ±10 % typ Drift 0.1 %/ °C typ SYSTEM CALIBRATION Positive Full-Scale Calibration Limit 18 1.05 × FS V max FS Is the Nominal Full-Scale Voltage (20 mV, 40 mV, 80 mV, 160 mV, 320 mV, 640 mV, 1.28 V) Negative Full-Scale Calibration Limit 18 –1.05 × FS V max Offset Calibration Limit 19 –1.05 × FS V min Input Span 19 0.8 × FS V min 2.1 × FS V max POWER REQUIREMENTS Power Supply Voltages AVDD – AGND Voltage +5 V nom DVDD Voltage +2.7 to +5.25 V min to V max With AGND = 0 V Power Supply Currents External MCLK. Digital I/Ps = 0 V or DVDD AVDD Current (Normal Mode) 10.3 mA max DVDD Current (Normal Mode) 1.7 mA max DVDD of 2.7 V to 3.3 V DVDD Current (Normal Mode) 3.2 mA max DVDD of 4.75 V to 5.25 V AVDD + DVDD Current (Standby Mode) 25 µA max Typically 10 µA. External MCLK IN = 0 V or DV DD Power Dissipation AVDD = DVDD = +5 V. Digital I/Ps = 0 V or DVDD Normal Mode 67.5 mW max Standby Mode 125 µW max Typically 50 µW. External MCLK IN = 0 V or DV DD REV. A |
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