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ADS7280IRSAT Datasheet(PDF) 6 Page - Texas Instruments |
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ADS7280IRSAT Datasheet(HTML) 6 Page - Texas Instruments |
6 / 46 page ADS7279 ADS7280 SBAS436 – MAY 2008........................................................................................................................................................................................................ www.ti.com ELECTRICAL CHARACTERISTICS: VREF = 2.5V (continued) At TA = –40°C to +85°C, +VA = 2.7V to 3.6V, +VBD = 1.65V to 1.5x(+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. ADS7279, ADS7280 PARAMETER TEST CONDITIONS MIN TYP MAX UNIT DYNAMIC CHARACTERISTICS VIN = 2.5VPP at 10kHz –100.8 THD Total harmonic distortion(4) dB VIN = 2.5VPP at 100kHz –88.4 VIN = 2.5VPP at 10kHz 81 83.1 SNR Signal-to-noise ratio dB VIN = 2.5VPP at 100kHz 82 VIN = 2.5VPP at 10kHz 83 SINAD Signal-to-noise + distortion dB VIN = 2.5VPP at 100kHz 81.4 VIN = 2.5VPP at 10kHz 102.6 SFDR Spurious-free dynamic range dB VIN = 2.5VPP at 100kHz 89.8 –3dB small-signal bandwidth 30 MHz CLOCK Internal conversion clock frequency 21 22 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 VREF [REF+ – 3.6V ≥ +VA ≥ 2.7V 2.475 2.5 2.525 Input reference (REF–)] VREF V range (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 POWER SUPPLY REQUIREMENTS +VBD 1.65 +VA 1.5 × (+VA) V Power-supply fs ≤ 1MHz 3 3.6 voltage +VA V fs ≤ 900kHz 2.7 3.6 1MHz sample rate, 4.5 6.0 3V ≤ +VA ≤ 3.6V 900kHz sample rate, mA 4.2 Supply current 2.7V ≤ +VA ≤ 3V Nap or Auto Nap mode 0.25 0.4 PD Mode 0.001 1 µA 1MSPS, BVDD = 1.8V 0.1 0.5 Buffer I/O supply current mA 1MSPS, BVDD = 3V 0.5 1.2 AVDD = 3V, BVDD = 1.8V 13.7 18.9 Power dissipation mW AVDD = 3V, BVDD = 3V 15.0 21.6 TEMPERATURE RANGE TA Operating free-air temperature –40 +85 °C (4) Calculated on the first nine harmonics of the input frequency. (5) Can vary ±30%. 6 Submit Documentation Feedback Copyright © 2008, Texas Instruments Incorporated Product Folder Link(s): ADS7279 ADS7280 |
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