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ADS7865I Datasheet(PDF) 3 Page - Texas Instruments |
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ADS7865I Datasheet(HTML) 3 Page - Texas Instruments |
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3 / 30 page  ELECTRICAL CHARACTERISTICS ADS7865 www.ti.com.............................................................................................................................................................................................. SBAS441 – OCTOBER 2008 At TA = –40°C to +125°C; over entire power-supply voltage range, VREF = 2.5V (internal), fCLK = 32MHz, and fDATA = 2MSPS, unless otherwise noted. ADS7865 PARAMETER TEST CONDITIONS MIN TYP(1) MAX UNIT RESOLUTION 12 Bits ANALOG INPUT FSR Full-scale differential input range (CHxx+) – (CHxx–) –VREF +VREF V VIN Absolute input voltage CHxx+ or CHxx– to AGND –0.1 AVDD + 0.1 V CIN Input capacitance CHxx+ or CHxx– to AGND 2 pF CID Differential input capacitance 4 pF IIL Input leakage current –50 50 nA CMRR Common-mode rejection ratio Both ADCs, dc to 100kHz 72 dB DC ACCURACY –40°C < TA < +125°C –1.25 ±0.6 +1.25 LSB INL Integral nonlinearity –40°C < TA < +85°C –1 ±0.5 +1 LSB DNL Differential nonlinearity(2) –1 ±0.4 +1 LSB Input offset error –3 ±0.5 +3 LSB VOS Match –3 ±0.5 +3 LSB dVOS/dT Input offset thermal drift ±2 µV/°C Gain error(2) –0.6 0.15 +0.6 % GERR Match –0.6 ±0.1 +0.6 % GERR/dT Gain error thermal drift ±2 ppm/°C PSRR Power-supply rejection ratio AVDD = 5V 70 dB AC ACCURACY SINAD Signal-to-noise + distortion VIN = 5VPP at 100kHz 69 71.3 dB SNR Signal-to-noise ratio VIN = 5VPP at 100kHz 70 71.7 dB THD Total harmonic distortion VIN = 5VPP at 100kHz –87 –74 dB SFDR Spurious-free dynamic range VIN = 5VPP at 100kHz 74 88 dB SAMPLING DYNAMICS tCONV Conversion time per ADC 1MHz < fCLK ≤ 32MHz 13 Clocks tACQ Acquisition time 62.5 ns fDATA Data rate 1MHz < fCLK ≤ 32MHz 62.5 2000 kSPS Aperture delay 6 ns tA Match 50 ps tAJIT Aperture jitter 50 ps fCLK Clock frequency on CLOCK 1 32 MHz (1) All values at TA = +25°C. (2) Ensured by design, not production tested. Copyright © 2008, Texas Instruments Incorporated Submit Documentation Feedback 3 Product Folder Link(s): ADS7865 |
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