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ADS7863IDBQR Datasheet(PDF) 4 Page - Texas Instruments |
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ADS7863IDBQR Datasheet(HTML) 4 Page - Texas Instruments |
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4 / 40 page  www.ti.com ELECTRICAL CHARACTERISTICS ADS7863 SBAS383B – JUNE 2007 – REVISED MARCH 2008 At TA = –40°C to +125°C, entire power-supply range, VREF = 2.5V (internal), fCLK = 32MHz, and tDATA = 2MSPS, unless otherwise noted. ADS7863 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 –1 +1 nA CMRR Common-mode rejection ratio Both ADCs, dc to 100kHz 72 dB DC ACCURACY –40 °C < T A < +125°C –1.25 ±0.6 +1.25 LSB INL Integral nonlinearity –40 °C < T A < +85°C –1 ±0.5 +1 LSB DNL Differential nonlinearity(2) –1 ±0.5 +1 LSB VOS Input offset error –3 ±0.5 +3 LSB VOS match –3 ±0.5 +3 LSB dVOS/dT Input offset thermal drift ±3 µV/°C GERR Gain error(2) –0.5 +1 % GERR match –0.5 ±0.1 +0.5 % GERR/dT Gain error thermal drift ±1 ppm/ °C PSRR Power-supply rejection ratio AVDD = 5.5V 70 dB AC ACCURACY SINAD Signal-to-noise + distortion VIN = 5VPP at 100kHz 69.8 71 dB SNR Signal-to-noise ratio VIN = 5VPP at 100kHz 70 71.5 dB THD Total harmonic distortion VIN = 5VPP at 100kHz –81 –76 dB SFDR Spurious-free dynamic range VIN = 5VPP at 100kHz 76 84 dB SAMPLING DYNAMICS(2) tCONV Conversion time per ADC 1MHz < fCLK ≤ 32MHz 16 tCLK tACQ Acquisition time 2 tCLK tDATA Data rate 1MHz < fCLK ≤ 32MHz 62.5 2000 kSPS tA Aperture delay 6 ns tA match 50 ps tAJIT Aperture jitter 50 ps fCLK Clock frequency on CLOCK 1 32 MHz TCLK Clock period 31.25 1000 ns INTERNAL VOLTAGE REFERENCE Resolution Reference output DAC resolution 10 Bits Over 20%...100% DAC range 0.2VREFOUT VREFOUT V DAC = 0x3FF, VREFOUT Reference output voltage 2.485 2.500 2.515 V –40 °C < T A < +125°C DAC = 0x3FF at +25 °C 2.495 2.500 2.505 V dVREFOUT/dT Reference voltage drift ±10 ppm/ °C –9.76 ±2.44 9.76 mV DNLDAC DAC differential nonlinearity –4 ±1 4 LSB –9.76 ±1.22 9.76 mV INLDAC DAC integral nonlinearity –4 ±0.5 4 LSB –9.76 ±2.44 9.76 mV VOSDAC DAC offset error VREFOUT = 0.5V –4 ±1 4 LSB (1) All typical values at TA = +25°C. (2) Ensured by design, not production tested. 4 Submit Documentation Feedback Copyright © 2007–2008, Texas Instruments Incorporated Product Folder Link(s): ADS7863 |
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