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AD7939BCP 数据表(PDF) 3 Page - Analog Devices |
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AD7939BCP 数据表(HTML) 3 Page - Analog Devices |
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3 / 32 page  Preliminary Technical Data AD7938/AD7939 AD7938—SPECIFICATIONS VDD = VDRIVE = 2.7 V to 5.25 V, Internal/External VREF = 2.5 V, unless otherwise noted, FCLKIN = 24 MHz, FSAMPLE = 1.5 MSPS; TA = TMIN to TMAX, unless otherwise noted. Table 1. Parameter B Version1 Unit Test Conditions/Comments DYNAMIC PERFORMANCE FIN = 50 kHz sine wave Signal-to-Noise + Distortion (SINAD)2 70 dB min Signal-to-Noise Ratio (SNR)2 70 dB min Total Harmonic Distortion (THD)2 −75 dB max −80 dB typ Peak Harmonic or Spurious Noise (SFDR)2 −75 dB max −82 dB typ Intermodulation Distortion (IMD)2 fa = 40.1 kHz, fb = 51.5 kHz Second-Order Terms −85 dB typ Third-Order Terms −85 dB typ Channel to Channel Isolation −85 dB typ Aperture Delay2 5 ns typ Aperture Jitter2 50 ps typ Full Power Bandwidth2, 3 20 MHz typ @ 3 dB 2.5 MHz typ @ 0.1 dB DC ACCURACY Resolution 12 Bits Integral Nonlinearity2 ±1 LSB max Differential Nonlinearity2 ±0.95 LSB max Guaranteed no missed codes to 12 bits Total Unadjusted Error TBD LSB max Single-Ended and Pseudo-Differential Input Straight binary output coding Offset Error2 ±4.5 LSB max Offset Error Match2 ±0.5 LSB max Gain Error2 ±2 LSB max Gain Error Match2 ±0.6 LSB max Fully Differential Input Twos complement output coding Positive Gain Error2 ±2 LSB max Positive Gain Error Match2 ±0.6 LSB max Zero-Code Error2 ±3 LSB max Zero-Code Error Match2 ±1 LSB max Negative Gain Error2 ±2 LSB max Negative Gain Error Match2 ±0.6 LSB max ANALOG INPUT Single-Ended Input Range 0 to VREF or 0 to 2 × VREF V Depending on RANGE bit setting Pseudo-Differential Input Range: VIN+ 0 to VREF or 2 × VREF V Depending on RANGE bit setting VIN− −0.1 to +0.4 V Fully Differential Input Range: VIN+ and VIN− VCM ± VREF/2 V VCM = common-mode voltage4 = VREF/2 VIN+ and VIN− VCM ± VREF V VCM = VREF, VIN+ or VIN− must remain within GND/VDD DC Leakage Current5 ±1 µA max Input Capacitance 45 pF typ When in track 10 pF typ When in hold REFERENCE INPUT/OUTPUT VREF Input Voltage6 2.5 V ±1% for specified performance DC Leakage Current ±1 µA max VREF Input Impedance 10 kΩ typ VREFOUT Output Voltage 2.5 V ±0.1% @ 25°C VREFOUT Temperature Coefficient 15 ppm/°C typ VREF Noise 10 µV typ 0.1 Hz to 10 Hz bandwidth 130 µV typ 0.1 Hz to 1 MHz bandwidth Rev. PrN | Page 3 of 32 |
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