Datasheet AD7864 (Analog Devices) - 5

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AD7864 Parameter A Version1 B Version Unit Test Conditions/Comments
AD7864-2 Input Voltage Range 0 to 2.5, 0 to 5 0 to 2.5, 0 to 5 V Input Current (0 V to 2.5 V Option) ±100 ±100 nA max Input Resistance (0 V to 5 V Option) 9 9 kΩ min REFERENCE INPUT/OUTPUT VREF In Input Voltage Range 2.375/2.625 2.375/2.625 VMIN/VMAX 2.5 V ± 5% VREF In Input Capacitance4 10 10 pF max VREF Out Output Voltage 2.5 2.5 V nom VREF Out Error @ 25°C ±10 ±10 mV max VREF Out Error TMIN to TMAX ±20 ±20 mV max VREF Out Temperature Coefficient 25 25 ppm/°C typ VREF Out Output Impedance 6 6 kΩ typ See the Reference section LOGIC INPUTS Input High Voltage, VINH 2.4 2.4 V min VDD = 5 V ± 5% Input Low Voltage, VINL 0.8 0.8 V max VDD = 5 V ± 5% Input Current, IIN ±10 ±10 μA max Input Capacitance, C 4 IN 10 10 pF max LOGIC OUTPUTS Output High Voltage, VOH 4.0 4.0 V min ISOURCE = 400 μA Output Low Voltage, VOL 0.4 0.4 V max ISINK = 1.6 mA DB11 to DB0 High Impedance Leakage Current ±10 ±10 μA max Capacitance4 10 10 pF max Output Coding AD7864-1, AD7864-3 Twos complement AD7864-2 Straight (natural) binary CONVERSION RATE Conversion Time 1.65 1.65 μs max For one channel Track-And-Hold Acquisition Time2, 3 0.35 0.35 μs max Throughput Time 130 130 kSPS max For all four channels POWER REQUIREMENTS VDD 5 5 V nom ±5% for specified performance IDD 5 μA typical, logic inputs = 0 V or VDD Normal Mode 24 24 mA max Standby Mode 20 20 μA max Typically 4 μA Power Dissipation Normal Mode 120 120 mW max Typically 90 mW Standby Mode 100 100 μW max Typically 20 μW 1 Temperature ranges are as follows: A, B versions: –40°C to +85°C. The A version is fully specified up to 105°C with a maximum sample rate of 450 kSPS and IDD maximum (normal mode) of 26 mA. 2 Performance is measured through the full channel (SHA and ADC). 3 See the Terminology section. 4 Sample tested at initial release to ensure compliance. Rev. D | Page 4 of 28 Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM PRODUCT HIGHLIGHTS TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS TIMING CHARACTERISTICS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TERMINOLOGY THEORY OF OPERATION CONVERTER DETAILS Track-and-Hold Amplifiers Reference CIRCUIT DESCRIPTION ANALOG INPUT AD7864-1 AD7864-2 AD7864-3 SELECTING A CONVERSION SEQUENCE TIMING AND CONTROL Reading Between Each Conversion in the Conversion Sequence Reading After the Conversion Sequence USING AN EXTERNAL CLOCK STANDBY MODE OPERATION ACCESSING THE OUTPUT DATA REGISTERS OFFSET AND FULL-SCALE ADJUSTMENT POSITIVE FULL-SCALE ADJUST NEGATIVE FULL-SCALE ADJUST DYNAMIC SPECIFICATIONS SIGNAL-TO-NOISE RATIO (SNR) EFFECTIVE NUMBER OF BITS INTERMODULATION DISTORTION AC LINEARITY PLOTS MEASURING APERTURE JITTER MICROPROCESSOR INTERFACING AD7864 TO ADSP-2100/ADSP-2101/ADSP-2102 INTERFACE AD7864 TO TMS320C5x INTERFACE AD7864 TO MC68HC000 INTERFACE VECTOR MOTOR CONTROL MULTIPLE AD7864S IN A SYSTEM OUTLINE DIMENSIONS ORDERING GUIDE