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ADS858xS bảng dữ liệu(PDF) 10 Page - Texas Instruments |
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ADS858xS bảng dữ liệu(HTML) 10 Page - Texas Instruments |
10 / 63 page 10 ADS8588S, ADS8586S, ADS8584S SBAS642 – DECEMBER 2016 www.ti.com Product Folder Links: ADS8588S ADS8586S ADS8584S Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated Electrical Characteristics (continued) minimum and maximum specifications are at TA = –40°C to +125°C, AVDD = 4.75 V to 5.25 V; typical specifications are at TA = 25°C; AVDD = 5 V, DVDD = 3 V, VREF = 2.5 V (internal), and fSAMPLE = 200 kSPS (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT TEST LEVEL(1) (6) Calculated on the first nine harmonics of the input frequency. (7) Isolation crosstalk is measured by applying a full-scale sinusoidal signal up to 160 kHz to a channel, not selected in the multiplexing sequence, and measuring the effect on the output of any selected channel. (8) Does not include the variation in voltage resulting from solder shift effects. (9) Recommended to use an X7R-grade, 0603-size ceramic capacitor for optimum performance (see the Layout Guidelines section). DYNAMIC CHARACTERISTICS SNR Signal-to-noise ratio, no oversampling (VIN – 0.5 dBFS at 1 kHz) Input range = ±10 V 91 92.7 dB A Input range = ±5 V 90.4 92.2 A SNROSR Signal-to-noise ratio, oversampling = 16X (VIN – 0.5 dBFS at 130 Hz) Input range = ±10 V 95.5 96.4 dB A Input range = ±5 V 94.4 95.5 A THD Total harmonic distortion(6) (VIN – 0.5 dBFS at 1 kHz) All input ranges –114 –95 dB B SINAD Signal-to-noise + distortion ratio, no oversampling (VIN – 0.5 dBFS at 1 kHz) Input range = ±10 V 90.7 92.7 dB A Input range = ±5 V 90.2 92.1 A SINADOSR Signal-to-noise + distortion ratio, oversampling = 16 X (VIN – 0.5 dBFS at 130 Hz) Input range = ±10 V 95 96.4 dB A Input range = ±5 V 94 95.4 A SFDR Spurious-free dynamic range (VIN – 0.5 dBFS at 1 kHz) All input ranges –118 dB B Crosstalk isolation(7) –95 dB A BW(–3 dB) Small-signal bandwidth –3 dB At TA = 25°C, input range = ±10 V 24 kHz B At TA = 25°C, input range = ±5 V 16 B BW(–0.1 dB) –0.1 dB At TA = 25°C, input range = ±10 V 14 kHz B At TA = 25°C, input range = ±5 V 9.5 B tGROUP Group delay Input range = ±10 V 13 µs C Input range = ±5 V 19 C INTERNAL REFERENCE OUTPUT (REFSEL = 1) VREF (8) Voltage on the REFIN/REFOUT pin (configured as output) At TA = 25°C 2.4975 2.5 2.5025 V A Internal reference temperature drift 7.5 ppm/°C B C(REFIN_ REFOUT) Decoupling capacitor on REFIN/REFOUT(9) 10 µF B V(REFCAP) Reference voltage to the ADC (on the REFCAPA, REFCAPB pin) At TA = 25°C 3.996 4.0 4.004 V A Reference buffer output impedance 0.5 1 Ω C Reference buffer output temperature drift 5 ppm/°C B C(REFCAP) Decoupling capacitor on REFCAPA, REFCAPB 10 μF B Turn-on time C(REFCAP) = 10 µF, C(REFIN_REFOUT) = 10 µF 25 ms B EXTERNAL REFERENCE INPUT (REFSEL = 0) VREFIO_EXT External reference voltage on REFIO (configured as input) 2.475 2.5 2.525 V B Reference input impedance 100 MΩ C Reference input capacitance 10 pF C |
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