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ADS7952 Datasheet(PDF) 4 Page - Texas Instruments |
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ADS7952 Datasheet(HTML) 4 Page - Texas Instruments |
4 / 43 page ELECTRICAL CHARACTERISTICS, ADS7950/51/52/53 ADS7950, ADS7951, ADS7952, ADS7953 ADS7954, ADS7955, ADS7956, ADS7957 ADS7958, ADS7959, ADS7960, ADS7961 SLAS605 – JUNE 2008 ...................................................................................................................................................................................................... www.ti.com +VA = 2.7 V to 5.25 V, +VBD = 1.7 V to 5.25 V, TA = -40°C to 125°C, fsample = 1 MHz (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT ANALOG INPUT Range 1 0 Vref Full-scale input span(1) V Range 2 0 2*Vref –0.20 VREF Range 1 +0.20 Absolute input range V –0.20 2*VREF Range 2 +0.20 Input capacitance 15 ρF Input leakage current TA = 125°C 61 nA SYSTEM PERFORMANCE Resolution 12 Bits ADS795XSB (2) 12 No missing codes Bits ADS795XS(2) 11 ADS795XSB(2) –1 ±0.5 1 Integral linearity LSB(3) ADS795XS(2) –1.5 ±0.75 1.5 ADS795XSB(2) –1 ±0.5 1 Differential linearity LSB ADS795XS(2) –2 ±0.75 1.5 Offset error(4) –3.5 ±1.1 3.5 LSB Range 1 –2 ±0.2 2 Gain error LSB Range 2 ±0.2 SAMPLING DYNAMICS Conversion time 20 MHz sclk 800 nSec Acquisition time 325 nSec Maximum throughput rate 20 MHz sclk 1.0 MHz Aperture delay 5 nsec Step response 150 nsec Over voltage recovery 150 nsec DYNAMIC CHARACTERISTICS Total harmonic distortion(5) 100 kHz –82 dB Signal-to-noise ratio 100 kHz, ADS795XSB(2) 70 71.7 dB 100 kHz, ADS795XS(2) 70 71.7 Signal-to-noise + distortion 100 kHz, ADS795XSB(2) 69 71.3 dB 100 kHz, ADS795XS(2) 68 71.3 Spurious free dynamic range 100 kHz 84 dB Small signal bandwidth At –3 dB 47 MHz Any off-channel with 100kHz, Full-scale input to channel being sampled with DC input (isolation –95 crosstalk). Channel-to-channel crosstalk dB From previously sampled to channel with 100kHz, Full-scale input to channel being sampled with DC –85 input (memory crosstalk). ETERNAL REFERENCE INPUT Vref reference voltage at REFP 2.49 2.5 2.51 V Reference resistance 100 k Ω (1) Ideal input span; does not include gain or offset error. (2) ADS795X, where X indicates 0, 1, 2, or 3 (3) LSB means Least Significant Bit. (4) Measured relative to an ideal full-scale input (5) Calculated on the first nine harmonics of the input frequency. 4 Submit Documentation Feedback Copyright © 2008, Texas Instruments Incorporated Product Folder Link(s): ADS7950, ADS7951, ADS7952, ADS7953 ADS7954, ADS7955, ADS7956, ADS7957 ADS7958, ADS7959, ADS7960, ADS7961 |
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