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ADS1174 Datasheet(PDF) 3 Page - Texas Instruments |
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ADS1174 Datasheet(HTML) 3 Page - Texas Instruments |
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3 / 40 page  ELECTRICAL CHARACTERISTICS ADS1174 ADS1178 www.ti.com ........................................................................................................................................ SBAS373B – OCTOBER 2007 – REVISED SEPTEMBER 2008 Limit specifications at TA = –40°C to +105°C. Typical specifications at TA = +25°C, AVDD = +5V, DVDD = +1.8V, IOVDD = +3.3V, fCLK = 27MHz, VREFP = 2.5V, VREFN = 0V, and all channels active, unless otherwise noted. ADS1174, ADS1178 PARAMETER TEST CONDITIONS MIN TYP MAX UNIT ANALOG INPUTS Full-scale input voltage (FSR(1)) VIN = (AINP – AINN) ±VREF V Absolute input voltage AINP or AINN to AGND AGND – 0.1 AVDD + 0.1 V Common-mode input voltage VCM = (AINP + AINN)/2 2.5 V High-Speed mode 28 k Ω Differential input impedance Low-Power mode 140 k Ω DC PERFORMANCE Resolution No missing codes 16 Bits High-Speed mode 52,734 SPS Data rate (fDATA) Low-Power mode 10,547 SPS Integral nonlinearity (INL)(2) Differential input ±0.3 ±1 LSB Offset error 0.3 2 mV Offset drift 2 µV/°C Gain error 0.1 0.5 % Gain drift 2 ppm/°C Noise Shorted input 1 LSBPP Common-mode rejection fCM = 60Hz (3) 100 dB AVDD fPS = 60Hz (3) 75 dB Power-supply rejection DVDD fPS = 60Hz (3) 85 dB IOVDD fPS = 60Hz (3) 90 dB VCOM output voltage No load AVDD/2 V AC PERFORMANCE Crosstalk VIN = 1kHz, –0.5dBFS –107 dB Signal-to-noise ratio (SNR) (unweighted) VIN = 1kHz, –0.5dBFS 92 97 dB Total harmonic distortion (THD)(4) High-Speed mode VIN = 1kHz, –0.5dBFS –105 –96 dB Spurious-free dynamic range 106 dB Passband ripple ±0.005 dB Passband 0.453 fDATA Hz –3dB Bandwidth 0.49 fDATA Hz Stop band attenuation 100 dB Stop band 0.547 fDATA 63.453 fDATA Hz Group delay 38/fDATA s Settling time (latency) Complete settling 76/fDATA s (1) FSR = full-scale range = 2VREF (2) Best-fit method. (3) fCM is the input common-mode frequency. fPS is the power-supply frequency. (4) THD includes the first nine harmonics of the input signal. Copyright © 2007–2008, Texas Instruments Incorporated Submit Documentation Feedback 3 Product Folder Link(s): ADS1174 ADS1178 |
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