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ADS8684IDBTR bảng dữ liệu(PDF) 9 Page - Texas Instruments |
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ADS8684IDBTR bảng dữ liệu(HTML) 9 Page - Texas Instruments |
9 / 80 page ADS8684A, ADS8688A www.ti.com SBAS680 – JULY 2015 Electrical Characteristics (continued) Minimum and maximum specifications are at TA = –40°C to 125°C. Typical specifications are at TA = 25°C. AVDD = 5 V, DVDD = 3 V, VREF = 4.096 V (internal), and fSAMPLE = 500 kSPS, unless otherwise noted. TEST PARAMETER TEST CONDITIONS MIN TYP MAX UNIT LEVEL(1) AUXILIARY CHANNEL Resolution 16 Bits A V(AUX_IN) AUX_IN voltage range (AUX_IN – AUX_GND) 0 VREF V A AUX_IN 0 VREF V A Operating input range AUX_GND 0 V A During sampling 75 pF C Ci Input capacitance During conversion 5 pF C IIkg(in) Input leakage current 100 nA A DNL Differential nonlinearity –0.99 ±0.6 1.5 LSB A INL Integral nonlinearity –4 ±1.5 4 LSB A EG(AUX) Gain error At TA = 25°C ±0.02 ±0.2 %FSR A EO(AUX) Offset error At TA = 25°C –5 5 mV A SNR Signal-to-noise ratio V(AUX_IN) = –0.5 dBFS at 1 kHz 87 89 dB A THD Total harmonic distortion(7) V(AUX_IN) = –0.5 dBFS at 1 kHz –102 dB B SINAD Signal-to-noise + distortion V(AUX_IN) = –0.5 dBFS at 1 kHz 86 88.5 dB A SFDR Spurious-free dynamic range V(AUX_IN) = –0.5 dBFS at 1 kHz 103 dB B INTERNAL REFERENCE OUTPUT Voltage on REFIO pin V(REFIO_INT) (10) At TA = 25°C 4.095 4.096 4.097 V A (configured as output) Internal reference temperature 6 10 ppm/°C B drift C(OUT_REFIO) Decoupling capacitor on REFIO 10 22 µF B Reference voltage to ADC V(REFCAP) At TA = 25°C 4.095 4.096 4.097 V A (on REFCAP pin) Reference buffer output 0.5 1 Ω B impedance Reference buffer temperature 0.6 1.5 ppm/°C B drift Decoupling capacitor on C(OUT_REFCAP) 10 22 μF B REFCAP C(OUT_REFCAP) = 22 µF, Turn-on time 15 ms B C(OUT_REFIO) = 22 µF EXTERNAL REFERENCE INPUT External reference voltage on VREFIO_EXT 4.046 4.096 4.146 V C REFIO (configured as input) (10) Does not include the variation in voltage resulting from solder-shift and long-term effects. Copyright © 2015, Texas Instruments Incorporated Submit Documentation Feedback 9 Product Folder Links: ADS8684A ADS8688A |
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