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AD7722AS 数据表(PDF) 2 Page - Analog Devices |
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AD7722AS 数据表(HTML) 2 Page - Analog Devices |
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2 / 24 page  –2– REV. 0 AD7722–SPECIFICATIONS1 (AV DD = AVDD1 = +5 V 5%; DVDD = +5 V 5%; AGND = AGND1 = DGND = 0 V; UNI = Logic Low or High; fCLKLIN = 12.5 MHz; FS = 195.3 kSPS; REF2 = +2.5 V; TA = TMIN to TMAX; unless otherwise noted) A Version Parameter Test Conditions/Comments Min Typ Max Units DYNAMIC SPECIFICATIONS 2 Bipolar Mode, UNI = VINH VCM = 2.5 V, VIN(+) = VIN(–) =1.25 V pk-pk or, VIN(–) =1.25 V, VIN(+) = 0 to 2.5 Signal to (Noise + Distortion) 3 Input Bandwidth 0 kHz–90.625 kHz 86/84.5 90 dB Input Bandwidth 0 kHz–100 kHz, fCLKIN = 14 MHz 84.5/83 dB Total Harmonic Distortion 3 Input Bandwidth 0 kHz–90.625 kHz –90/–88 dB Input Bandwidth 0 kHz–100 kHz, fCLKIN = 14 MHz –88/–86 dB Spurious Free Dynamic Range Input Bandwidth 0 kHz–90.625 kHz –90 dB Input Bandwidth 0 kHz–100 kHz, fCLKIN = 14 MHz –88 dB Unipolar Mode, UNI = VINL VIN(–) = 0 V, VIN(+) = 0 to 2.5 Signal to (Noise + Distortion) 3 Input Bandwidth 0 kHz–90.625 kHz 84.5/83 88 dB Total Harmonic Distortion 3 Input Bandwidth 0 kHz–97.65 kHz –89/–87 dB Spurious Free Dynamic Range Input Bandwidth 0 kHz–97.65 kHz –90 dB Intermodulation Distortion –93 dB AC CMRR VIN(+) = VIN(–) = 2.5 V pk-pk VCM = 1.25 V to 3.75 V, 20 kHz 96 dB Digital Filter Response Pass-Band Ripple 0 kHz–90.625 kHz ±0.005 dB Cutoff Frequency 96.92 kHz Stop-Band Attenuation 104.6875 kHz to 12.395 MHz 90 dB ANALOG INPUTS Full-Scale Input Span VIN(+)–VIN(–) Bipolar Mode UNI = VINH –VREF2/2 +VREF2/2 V Unipolar Mode UNI = VINL 0VREF2 V Absolute Input Voltage VIN(+) and VIN(–) 0 AVDD V Input Sampling Capacitance 2pF Input Sampling Rate Guaranteed by Design 2 × f CLKIN Hz Differential Input Impedance 1/8E-09 × f CLKIN k Ω CLOCK CLKIN Mark Space Ratio 45 55 % REFERENCE REF1 Output Voltage 2.32 2.47 2.62 V REF1 Output Voltage Drift 60 ppm/ °C REF1 Output Impedance 3k Ω Reference Buffer Offset Voltage Offset Between REF1 and REF2 ±12 mV Using Internal Reference REF2 Output Voltage 2.32 2.47 2.62 V REF2 Output Voltage Drift 60 ppm/ °C Using External Reference REF2 Input Impedance REF1 = AGND 1/16E-09 × f CLKIN k Ω External Reference Voltage Range Applied to REF1 or REF2 2.32 2.5 2.62 V STATIC PERFORMANCE Resolution 16 Bits Differential Nonlinearity Guaranteed Monotonic ±0.5 ±1 LSB Integral Nonlinearity ±2 LSB After Calibration Offset Error 4 ±3mV Gain Error 4, 5 ±0.6 % FSR Without Calibration Offset Error ±6mV Gain Error 5 ±0.6 % FSR Offset Error Drift ±1 LSB/ °C Gain Error Drift REF2 Is an Ideal Reference, REF1 = AGND Unipolar Mode ±1 LSB/ °C Bipolar Mode ±0.5 LSB/ °C |
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