Datasheet AD7861 (Analog Devices) - 3

AD7861–SPECIFICATIONS (VDD = 5 V
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5%; TA = –40
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C to +85
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C; REFIN = 2.5 V; Ext CLK @ 12.5 MHz, unless otherwise noted) Parameter AD7861AP Units Conditions/Comments
DC ACCURACY Resolution 11 Bits Twos Complement Data Format Relative Accuracy ±2 LSB max Integral Nonlinearity Differential Nonlinearity ±2.5 LSB max Bias Offset Error ±9 LSB max Any Channel Bias Offset Error Match 4 LSB max Between Channels Full-Scale Error ±13 LSB max Any Channel Full-Scale Error Match 4 LSB max Between Channels DYNAMIC PERFORMANCE Signal-to-Noise Ratio (SNR) 60 dB min fIN = 1 kHz Sine Wave, fSAMPLE = 75 kHz Total Harmonic Distortion (THD) –60 dB max fIN = 1 kHz Sine Wave, fSAMPLE = 75 kHz Peak Harmonic or Spurious Noise –60 dB max fIN = 1 kHz Sine Wave, fSAMPLE = 75 kHz Channel-to-Channel Isolation M1 = 0 –58 dB max 1 kHz Sine Wave Applied to Unselected Channels M1 = 1 –53 dB max 1 kHz Sine Wave Applied to Unselected Channels REFERENCE Input Voltage Range (REF IN) 2.5 V Input Current 50 µA max Onboard Reference Output (REF OUT) 2.5 V Reference Tolerance ±5 % Reference Drive Capability ±100 µA max SAMPLE-AND-HOLD Acquisition Time 1.6 µs 20 CLK Cycles @ 12.5 MHz Aperture Delay Time 200 ns max Aperture Delay Time Match 20 ns max Droop Rate 5 mV/ms max LOGIC Input High Voltage (VIH) 2 V min Input Low Voltage (VIL) 0.8 V max Input Leakage Current 1 µA max Input Capacitance 20 pF typ (VOH) 4.5 V min ISOURCE Current = 20 µA, VDD = 5 V (VOL) 0.4 V max ISINK Current = 400 µA, VDD = 5 V Three-State Leakage Current 1 µA max CONVERSION RATE Conversion Time/Channel 40 CLK Cycles CONVST Pulsewidth 2 CLK Cycles min ANALOG INPUTS Nominal Input Level 0–5 V VIN1, VIN2, VIN3, AUX0–AUX3 Input Current 100 µA Input Capacitance 10 pF SYSTEM CLOCK 6.25–12.5 MHz POWER REQUIREMENTS VDD 5 V dc IDD 10 mA max – 2 – REV. B