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ADS7229IRSAR Datasheet(PDF) 6 Page - Texas Instruments |
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ADS7229IRSAR Datasheet(HTML) 6 Page - Texas Instruments |
6 / 51 page ADS7229 ADS7230 SBAS437A – MAY 2008 – REVISED JUNE 2009 ............................................................................................................................................................... www.ti.com ELECTRICAL CHARACTERISTICS (continued) At TA = –40°C to +85°C, +VA = 2.7V to 3.6V, +VBD = 1.65V to 1.5 × (+VA), VREF = 2.5V, fSAMPLE = 1MHz for 3V ≤ +VA ≤ 3.6V, and fSAMPLE = 900kHz for 3V < +VA ≤ 2.7V using external clock, unless otherwise noted. ADS7229, ADS7230 PARAMETER TEST CONDITIONS MIN TYP MAX UNIT DYNAMIC CHARACTERISTICS VIN = 2.5VPP at 10kHz –96.8 THD Total harmonic distortion(4) dB VIN = 2.5VPP at 100kHz –88.4 VIN = 2.5VPP at 10kHz 72 73.2 SNR Signal-to-noise ratio dB VIN = 2.5VPP at 100kHz 72 VIN = 2.5VPP at 10kHz 73.1 SINAD Signal-to-noise + distortion dB VIN = 2.5VPP at 100kHz 72.1 VIN = 2.5VPP at 10kHz 95.9 SFDR Spurious-free dynamic range dB VIN = 2.5VPP at 100kHz 91.5 –3dB small-signal bandwidth 30 MHz CLOCK Internal conversion clock frequency 21 23 23.5 MHz Used as I/O clock only 42 SCLK external serial clock MHz As I/O clock and conversion clock 1 42 EXTERNAL VOLTAGE REFERENCE INPUT fSAMPLE ≤ 500kSPS, 0.3 2.525 2.7V ≤ +VA < 3V fSAMPLE ≤ 500kSPS, 0.3 3 3V ≤ +VA < 3.6V VREF [(REF+) – (REF–)] Input reference VREF fSAMPLE > 500kSPS, V range 2.475 2.525 2.7V ≤ +VA < 3V fSAMPLE > 500kSPS, 2.475 3 3V ≤ +VA ≤ 3.6V (REF–) – AGND –0.1 0.1 Resistance(5) Reference input 40 k Ω DIGITAL INPUT/OUTPUT Logic family—CMOS VIH High-level input voltage (+VA × 1.5)V ≥ +VBD ≥ 1.65V 0.65 × (+VBD) +VBD + 0.3 V VIL Low-level input voltage (+VA × 1.5)V ≥ +VBD ≥ 1.65V –0.3 0.35 × (+VBD) V II Input current VI = +VBD or BDGND –50 50 nA CI Input capacitance 5 pF (+VA × 1.5)V ≥ +VBD ≥ 1.65V, VOH High-level output voltage +VBD – 0.6 +VBD V IO = 100µA (+VA × 1.5)V ≥ +VBD ≥ 1.65V, VOL Low-level output voltage 0 0.4 V IO = 100µA CO Output capacitance 5 pF CL Load capacitance 30 pF Data format—straight binary (4) Calculated on the first nine harmonics of the input frequency. (5) Can vary ±30%. 6 Submit Documentation Feedback Copyright © 2008–2009, Texas Instruments Incorporated Product Folder Link(s): ADS7229 ADS7230 |
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