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ADS7251IRTET Datasheet(PDF) 5 Page - Texas Instruments |
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ADS7251IRTET Datasheet(HTML) 5 Page - Texas Instruments |
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5 / 38 page  ADS7251, ADS7851 www.ti.com SBAS587A – JANUARY 2014 – REVISED APRIL 2014 6.5 Electrical Characteristics: ADS7251 All minimum and maximum specifications are at TA = –40°C to +125°C, AVDD = 5 V, VREF_A = VREF_B = 2.5 V, and fDATA = 2 MSPS, unless otherwise noted. Typical values are at TA = +25°C, AVDD = 5 V, and DVDD = 3.3 V. PARAMETER TEST CONDITIONS MIN TYP MAX UNIT RESOLUTION Resolution 12 Bits SAMPLING DYNAMICS tCONV Conversion time tSU_CSCK + 12 tCLK ns tACQ Acquisition time 75 ns fDATA Data rate 2 MSPS fCLK Clock frequency 32 MHz DC ACCURACY NMC No missing codes 12 Bits DNL Differential nonlinearity –0.99 ±0.3 1 LSB INL Integral nonlinearity –1 ±0.5 1 LSB VOS Input offset error –1 ±0.2 1 mV VOS match ADC_A to ADC_B –1 ±0.2 1 mV dVOS/dT Input offset thermal drift 4 μV/°C Referenced to the voltage at GE Gain error –0.1% ±0.05% 0.1% REFOUT_x GERR match ADC_A to ADC_B –0.1% ±0.05% 0.1% Referenced to the voltage at GE/dT Gain error thermal drift 1 ppm/°C REFOUT_x CMRR Common-mode rejection ratio Both ADCs, dc to 20 kHz 72 dB AC ACCURACY SINAD Signal-to-noise + distortion 72.7 72.9 dB SNR Signal-to-noise ratio 72.8 73 dB For 20-kHz input frequency, at –0.5 dBFS THD Total harmonic distortion –90 dB SFDR Spurious-free dynamic range 90 dB Isolation between ADC_A and fIN = 15 kHz, fNOISE = 25 kHz –105 dB ADC_B SUPPLY CURRENT Analog, during Throughput = 2 MSPS, IAVDD-DYNAMIC 11 12 mA conversion AVDD = 5 V Supply IAVDD-STATIC current Analog, static 5.5 mA IDVDD Digital, for code 800 0.15 mA POWER DISSIPATION Throughput = 2 MSPS, PD-ACTIVE During conversion 55 60 mW Power AVDD = 5 V dissipation PD-STATIC Static mode 27.5 mW Copyright © 2014, Texas Instruments Incorporated Submit Documentation Feedback 5 Product Folder Links: ADS7251 ADS7851 |
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