Datasheet AD7854, AD7854L (Analog Devices) - 2

AD7854/AD7854L–SPECIFICATIONS1, 2 (AVDD = DVDD = +3.0 V to +5.5 V, REFIN/REFOUT = 2.5 V External Reference, fCLKIN = 4 MHz (for L Version: 1.8 MHz (0
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C to +70
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C) and 1 MHz (–40
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C to +85
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C)); fSAMPLE = 200 kHz (AD7854), 100 kHz (AD7854L); TA = TMIN to TMAX, unless otherwise noted.) Specifications in () apply to the AD7854L. Parameter A Version1 B Version1 S Version1 Units Test Conditions/Comments
DYNAMIC PERFORMANCE Signal to Noise + Distortion Ratio3 70 71 70 dB min Typically SNR is 72 dB (SNR) VIN = 10 kHz Sine Wave, fSAMPLE = 200 kHz (L Version: fSAMPLE = 100 kHz @ fCLKIN = 2 MHz) Total Harmonic Distortion (THD) –78 –78 –78 dB max VIN = 10 kHz Sine Wave, fSAMPLE = 200 kHz (L Version: fSAMPLE = 100 kHz @ fCLKIN = 2 MHz) Peak Harmonic or Spurious Noise –78 –78 –78 dB max VIN = 10 kHz Sine Wave, fSAMPLE = 200 kHz (L Version: fSAMPLE = 100 kHz @ fCLKIN = 2 MHz) Intermodulation Distortion (IMD) Second Order Terms –78 –78 –78 dB typ fa = 9.983 kHz, fb = 10.05 kHz, fSAMPLE = 200 kHz (L Version: fSAMPLE = 100 kHz @ fCLKIN = 2 MHz) Third Order Terms –78 –78 –78 dB typ fa = 9.983 kHz, fb = 10.05 kHz, fSAMPLE = 200 kHz (L Version: fSAMPLE = 100 kHz @ fCLKIN = 2 MHz) DC ACCURACY Resolution 12 12 12 Bits Integral Nonlinearity ±1 ±0.5 ±1 LSB max 5 V Reference VDD = 5 V Differential Nonlinearity ±1 ±1 ±1 LSB max Guaranteed No Missed Codes to 12 Bits Unipolar Offset Error ±3 ±3 ±4 LSB max ±2 ±2 ±2 LSB typ Unipolar Gain Error ±4 ±4 ±4 LSB max ±2 ±2 ±2 LSB typ Bipolar Positive Full-Scale Error ±4 ±4 ±5 LSB max ±2 ±2 ±2 LSB typ Negative Full-Scale Error ±4 ±4 ±5 LSB max ±2 ±2 ±2 LSB typ Bipolar Zero Error ±4 ±4 ±5 LSB max ANALOG INPUT Input Voltage Ranges 0 to VREF 0 to VREF 0 to VREF Volts i.e., AIN(+) – AIN(–) = 0 to VREF, AIN(–) can be biased up but AIN(+) cannot go below AIN(–). ±VREF/2 ±VREF/2 ±VREF/2 Volts i.e., AIN(+) – AIN(–) = –VREF/2 to +VREF/2, AIN(–) should be biased to +VREF/2 and AIN(+) can go below AIN(–) but cannot go below 0 V. Leakage Current ±1 ±1 ±1 µA max Input Capacitance 20 20 20 pF typ REFERENCE INPUT/OUTPUT REFIN Input Voltage Range 2.3/VDD 2.3/VDD 2.3/VDD V min/max Functional from 1.2 V Input Impedance 150 150 150 kΩ typ REFOUT Output Voltage 2.3/2.75 2.3/2.7 2.3/2.7 V min/max REFOUT Tempco 20 20 20 ppm/°C typ LOGIC INPUTS Input High Voltage, VINH 3 3 3 V min AVDD = DVDD = 4.5 V to 5.5 V 2.1 2.1 2.1 V min AVDD = DVDD = 3.0 V to 3.6 V Input Low Voltage, VINL 0.4 0.4 0.4 V max AVDD = DVDD = 4.5 V to 5.5 V 0.6 0.6 0.6 V max AVDD = DVDD = 3.0 V to 3.6 V Input Current, IIN ±10 ±10 ±10 µA max Typically 10 nA, VIN = 0 V or VDD Input Capacitance, C 4 IN 10 10 10 pF max LOGIC OUTPUTS Output High Voltage, VOH ISOURCE = 200 µA 4 4 4 V min AVDD = DVDD = 4.5 V to 5.5 V 2.4 2.4 2.4 V min AVDD = DVDD = 3.0 V to 3.6 V Output Low Voltage, VOL 0.4 0.4 0.4 V max ISINK = 0.8 mA Floating-State Leakage Current ±10 ±10 ±10 µA max Floating-State Output Capacitance4 10 10 10 pF max Output Coding Straight (Natural) Binary Unipolar Input Range Twos Complement Bipolar Input Range CONVERSION RATE tCLKIN × 18 Conversion Time 4.6 (10) 4.6 (9) 4.6 (9) µs max (L Versions Only, 0°C to +70°C, 1.8 MHz CLKIN) Track/Hold Acquisition Time 0.5 (1) 0.5 (1) 0.5 (1) µs min (L Versions Only, –40°C to +85°C, 1 MHz CLKIN) –2– REV. B