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ADS774H Datasheet(PDF) 3 Page - Texas Instruments |
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ADS774H Datasheet(HTML) 3 Page - Texas Instruments |
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3 / 23 page  ELECTRICAL CHARACTERISTICS ADS774H www.ti.com ................................................................................................................................................................................................ SBAS443 – AUGUST 2009 All specifications at TA = TMIN to TMAX, VDD = +5V, VEE = –15V to +5V, sampling frequency of 117kHz, and fIN = 10kHz, unless otherwise noted. ADS774HI ADS774HIB(1) PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNIT SYSTEM PERFORMANCE Resolution 12 12 Bits ANALOG INPUTS 0 to +10, 0 to +10, Unipolar V 0 to +20 0 to +20 Voltage range Bipolar ±5, ±10 ±5, ±10 V 0V to +10V, ±5V 8.5 12 8.5 12 k Ω Impedance ±10V, 0V to +20V 35 50 35 50 k Ω DIGITAL INPUTS (CE, CS, R/C, A0, 12/8) Logic 1 +2.0 +5.5 +2.0 +5.5 V Voltages Logic 0 –0.5 +0.8 –0.5 +0.8 V Current –5 0.1 +5 –5 0.1 +5 µA Capacitance 5 5 pF DC ACCURACY At +25°C ±1 ±1/2 LSB Linearity error TMIN to TMAX (2) ±1 ±1/2 LSB Unipolar offset error At +25°C (adjustable to zero) ±2 ±2 LSB Unipolar offset TMIN to TMAX (2) ±4 ±3 LSB Bipolar offset error At +25°C (adjustable to zero) ±10 ±4 LSB Bipolar offset TMIN to TMAX (2) ±12 ±5 LSB At +25°C (adjustable to zero) ±0.25 ±0.25 % of FS(4) Full-scale calibration error(3) TMIN to TMAX (2) ±0.47 ±0.37 % of FS At +25°C 12 12 Bits No missing codes resolution TMIN to TMAX (2) 12 12 Bits AC ACCURACY(5) Spurious free dynamic range 73 78 76 78 dB Total harmonic distortion –77 –72 –77 –75 dB Signal-to-noise ratio 69 72 71 72 dB Signal-to-(noise + distortion) ratio 68 71 70 71 dB Intermodulation distortion fIN1 = 20kHz, fIN2 = 23kHz –75 –75 dB TEMPERATURE COEFFICIENTS(6) Unipolar offset ±1 ±1 ppm/°C Bipolar offset ±2 ±2 ppm/°C Full-scale calibration ±12 ±12 ppm/°C POWER-SUPPLY SENSITIVITY Change in full-scale calibration(7) +4.75V < VDD < +5.25V ±1/2 ±1/2 LSB CONVERSION TIME (Including Acquisition Time) 8-bit cycle 5.5 5.9 5.5 5.9 µs tAQ + tC at +25°C 12-bit cycle 7.5 8 7.5 8 µs 12-bit cycle, TMIN to TMAX 8 8.5 8 8.5 µs (1) Shaded cells indicate different specifications from standard grade version of device. (2) Maximum error at TMIN and TMAX. (3) With fixed 50 Ω resistor from REF OUT to REF IN. This parameter is also adjustable to zero at +25°C. (4) FS in this parametric table means Full-Scale Range. That is, for a ±10V input range, FS = 20V; for a 0V to +10V range, FS = 10V. (5) Based on VEE = +5V, which is the Control Mode; see the S/H Control Mode and ADC774 Emulation Mode section. (6) Using internal reference. (7) This parameter is the worst-case change in accuracy from accuracy with a +5V supply. Copyright © 2009, Texas Instruments Incorporated Submit Documentation Feedback 3 |
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